./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 30f4e4ab Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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_1b.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 cb528549fa76ae8087cf7043645dfa20323a0116 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-30f4e4a [2019-11-28 02:56:29,108 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 02:56:29,111 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 02:56:29,129 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 02:56:29,129 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 02:56:29,131 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 02:56:29,133 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 02:56:29,143 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 02:56:29,148 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 02:56:29,153 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 02:56:29,154 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 02:56:29,156 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 02:56:29,156 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 02:56:29,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 02:56:29,161 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 02:56:29,163 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 02:56:29,164 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 02:56:29,165 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 02:56:29,168 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 02:56:29,172 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 02:56:29,176 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 02:56:29,180 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 02:56:29,181 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 02:56:29,183 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 02:56:29,186 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 02:56:29,186 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 02:56:29,187 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 02:56:29,189 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 02:56:29,189 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 02:56:29,190 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 02:56:29,190 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 02:56:29,191 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 02:56:29,191 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 02:56:29,192 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 02:56:29,193 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 02:56:29,193 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 02:56:29,194 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 02:56:29,194 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 02:56:29,194 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 02:56:29,195 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 02:56:29,197 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 02:56:29,198 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-11-28 02:56:29,214 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 02:56:29,214 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 02:56:29,215 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 02:56:29,216 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 02:56:29,216 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 02:56:29,216 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-28 02:56:29,216 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-28 02:56:29,217 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-28 02:56:29,217 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-28 02:56:29,217 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-28 02:56:29,217 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-28 02:56:29,217 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 02:56:29,218 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-28 02:56:29,218 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 02:56:29,218 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 02:56:29,218 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-28 02:56:29,219 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-28 02:56:29,219 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-28 02:56:29,219 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 02:56:29,219 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-28 02:56:29,219 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 02:56:29,220 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-28 02:56:29,220 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 02:56:29,220 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 02:56:29,220 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-28 02:56:29,221 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 02:56:29,221 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 02:56:29,221 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-28 02:56:29,222 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-28 02:56:29,222 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR 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 -> cb528549fa76ae8087cf7043645dfa20323a0116 [2019-11-28 02:56:29,533 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 02:56:29,552 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 02:56:29,555 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 02:56:29,557 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 02:56:29,557 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 02:56:29,558 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c [2019-11-28 02:56:29,616 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da6114f3a/57e81b13b1214f339e6c867360856300/FLAGda4017940 [2019-11-28 02:56:30,037 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 02:56:30,037 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c [2019-11-28 02:56:30,043 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da6114f3a/57e81b13b1214f339e6c867360856300/FLAGda4017940 [2019-11-28 02:56:30,460 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da6114f3a/57e81b13b1214f339e6c867360856300 [2019-11-28 02:56:30,464 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 02:56:30,466 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 02:56:30,467 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 02:56:30,467 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 02:56:30,471 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 02:56:30,472 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:56:30" (1/1) ... [2019-11-28 02:56:30,475 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dc447bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:30, skipping insertion in model container [2019-11-28 02:56:30,475 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:56:30" (1/1) ... [2019-11-28 02:56:30,484 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 02:56:30,505 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 02:56:30,748 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 02:56:30,756 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 02:56:30,778 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 02:56:30,795 INFO L208 MainTranslator]: Completed translation [2019-11-28 02:56:30,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:30 WrapperNode [2019-11-28 02:56:30,796 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 02:56:30,797 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 02:56:30,797 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 02:56:30,798 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 02:56:30,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:30" (1/1) ... [2019-11-28 02:56:30,814 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:30" (1/1) ... [2019-11-28 02:56:30,894 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 02:56:30,894 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 02:56:30,894 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 02:56:30,894 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 02:56:30,905 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:30" (1/1) ... [2019-11-28 02:56:30,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:30" (1/1) ... [2019-11-28 02:56:30,906 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:30" (1/1) ... [2019-11-28 02:56:30,906 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:30" (1/1) ... [2019-11-28 02:56:30,909 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:30" (1/1) ... [2019-11-28 02:56:30,912 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:30" (1/1) ... [2019-11-28 02:56:30,913 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:30" (1/1) ... [2019-11-28 02:56:30,914 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 02:56:30,915 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 02:56:30,915 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 02:56:30,915 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 02:56:30,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:30,993 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2019-11-28 02:56:30,993 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2019-11-28 02:56:30,993 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2019-11-28 02:56:30,994 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2019-11-28 02:56:30,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 02:56:30,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 02:56:31,217 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 02:56:31,217 INFO L297 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 02:56:31,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:56:31 BoogieIcfgContainer [2019-11-28 02:56:31,219 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 02:56:31,219 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-28 02:56:31,219 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-28 02:56:31,223 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-28 02:56:31,224 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 02:56:31,224 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 02:56:30" (1/3) ... [2019-11-28 02:56:31,226 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5869c3b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 02:56:31, skipping insertion in model container [2019-11-28 02:56:31,226 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 02:56:31,226 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:30" (2/3) ... [2019-11-28 02:56:31,226 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5869c3b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 02:56:31, skipping insertion in model container [2019-11-28 02:56:31,227 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 02:56:31,227 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:56:31" (3/3) ... [2019-11-28 02:56:31,228 INFO L371 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1b.c [2019-11-28 02:56:31,315 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-28 02:56:31,315 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-28 02:56:31,315 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-28 02:56:31,316 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 02:56:31,316 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 02:56:31,316 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-28 02:56:31,316 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 02:56:31,316 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-28 02:56:31,337 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2019-11-28 02:56:31,370 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-28 02:56:31,370 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 02:56:31,370 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 02:56:31,380 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-28 02:56:31,380 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 02:56:31,380 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-28 02:56:31,381 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2019-11-28 02:56:31,384 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-28 02:56:31,384 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 02:56:31,384 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 02:56:31,385 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-28 02:56:31,385 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 02:56:31,396 INFO L794 eck$LassoCheckResult]: Stem: 13#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 22#L25true call main_#t~ret6 := rec2(main_~x~0);< 3#rec2ENTRYtrue [2019-11-28 02:56:31,397 INFO L796 eck$LassoCheckResult]: Loop: 3#rec2ENTRYtrue ~j := #in~j; 20#L18true assume !(~j <= 0); 18#L20true call #t~ret3 := rec1(~j - 1);< 4#rec1ENTRYtrue ~i := #in~i; 9#L12true assume ~i <= 0;#res := 0; 5#rec1FINALtrue assume true; 12#rec1EXITtrue >#33#return; 23#L20-1true call #t~ret4 := rec2(#t~ret3);< 3#rec2ENTRYtrue [2019-11-28 02:56:31,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:31,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1617, now seen corresponding path program 1 times [2019-11-28 02:56:31,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:31,436 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410588290] [2019-11-28 02:56:31,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:31,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:31,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:31,541 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:56:31,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:31,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1102838740, now seen corresponding path program 1 times [2019-11-28 02:56:31,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:31,544 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49680171] [2019-11-28 02:56:31,544 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:31,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:31,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:31,574 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:56:31,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:31,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1371489668, now seen corresponding path program 1 times [2019-11-28 02:56:31,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:31,578 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608505858] [2019-11-28 02:56:31,578 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:31,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:31,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:31,608 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:56:31,803 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 02:56:31,804 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 02:56:31,804 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 02:56:31,804 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 02:56:31,804 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 02:56:31,805 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:31,805 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 02:56:31,805 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 02:56:31,806 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration1_Loop [2019-11-28 02:56:31,806 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 02:56:31,806 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 02:56:31,830 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:31,837 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:31,844 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:31,847 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:31,851 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:31,912 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 02:56:31,913 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:31,927 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:31,928 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:31,939 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:31,940 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_~j=0} Honda state: {rec2_~j=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:31,954 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:31,954 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:31,959 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:31,960 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret3=0} Honda state: {rec2_#t~ret3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:31,976 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:31,976 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:31,982 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:31,982 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#res=0} Honda state: {rec2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:31,999 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:32,000 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:32,005 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:32,005 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret4=0} Honda state: {rec2_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:32,021 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:32,022 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:32,041 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 02:56:32,041 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:32,057 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 02:56:32,059 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 02:56:32,060 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 02:56:32,060 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 02:56:32,060 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 02:56:32,060 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 02:56:32,063 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:32,063 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 02:56:32,064 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 02:56:32,064 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration1_Loop [2019-11-28 02:56:32,064 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 02:56:32,064 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 02:56:32,067 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:32,075 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:32,080 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:32,085 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:32,103 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:32,161 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 02:56:32,168 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:32,186 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 02:56:32,191 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:32,192 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:32,192 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:32,193 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:32,193 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:32,196 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:32,197 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:32,202 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:32,221 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 02:56:32,226 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:32,226 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:32,228 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:32,229 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:32,229 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:32,232 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:32,232 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:32,238 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:32,256 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 02:56:32,259 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:32,259 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:32,260 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:32,260 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:32,260 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:32,262 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:32,262 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 02:56:32,268 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:32,287 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 02:56:32,289 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:32,289 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:32,290 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:32,290 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:32,291 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:32,295 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:32,296 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:32,300 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 02:56:32,315 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-28 02:56:32,315 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:32,340 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 02:56:32,340 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 02:56:32,341 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 02:56:32,342 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#in~j) = 1*rec2_#in~j Supporting invariants [] [2019-11-28 02:56:32,348 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:32,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:32,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:32,412 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 02:56:32,415 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:32,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:32,454 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-28 02:56:32,458 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:32,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 02:56:32,575 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 6 loop predicates [2019-11-28 02:56:32,576 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 21 states. Second operand 7 states. [2019-11-28 02:56:33,225 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 21 states.. Second operand 7 states. Result 194 states and 279 transitions. Complement of second has 61 states. [2019-11-28 02:56:33,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 1 stem states 9 non-accepting loop states 1 accepting loop states [2019-11-28 02:56:33,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-28 02:56:33,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 57 transitions. [2019-11-28 02:56:33,237 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 57 transitions. Stem has 2 letters. Loop has 8 letters. [2019-11-28 02:56:33,241 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:33,241 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 57 transitions. Stem has 10 letters. Loop has 8 letters. [2019-11-28 02:56:33,241 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:33,241 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 57 transitions. Stem has 2 letters. Loop has 16 letters. [2019-11-28 02:56:33,242 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:33,243 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 194 states and 279 transitions. [2019-11-28 02:56:33,259 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-28 02:56:33,278 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 194 states to 82 states and 120 transitions. [2019-11-28 02:56:33,282 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 35 [2019-11-28 02:56:33,284 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 38 [2019-11-28 02:56:33,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 82 states and 120 transitions. [2019-11-28 02:56:33,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 02:56:33,285 INFO L688 BuchiCegarLoop]: Abstraction has 82 states and 120 transitions. [2019-11-28 02:56:33,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states and 120 transitions. [2019-11-28 02:56:33,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2019-11-28 02:56:33,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-28 02:56:33,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 83 transitions. [2019-11-28 02:56:33,334 INFO L711 BuchiCegarLoop]: Abstraction has 55 states and 83 transitions. [2019-11-28 02:56:33,334 INFO L591 BuchiCegarLoop]: Abstraction has 55 states and 83 transitions. [2019-11-28 02:56:33,334 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-28 02:56:33,334 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 55 states and 83 transitions. [2019-11-28 02:56:33,336 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-28 02:56:33,337 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 02:56:33,337 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 02:56:33,337 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 02:56:33,338 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-28 02:56:33,338 INFO L794 eck$LassoCheckResult]: Stem: 378#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 345#L25 call main_#t~ret6 := rec2(main_~x~0);< 344#rec2ENTRY ~j := #in~j; 347#L18 assume !(~j <= 0); 363#L20 call #t~ret3 := rec1(~j - 1);< 379#rec1ENTRY ~i := #in~i; 397#L12 assume !(~i <= 0); 351#L14 call #t~ret0 := rec1(~i - 2);< 350#rec1ENTRY [2019-11-28 02:56:33,338 INFO L796 eck$LassoCheckResult]: Loop: 350#rec1ENTRY ~i := #in~i; 358#L12 assume !(~i <= 0); 354#L14 call #t~ret0 := rec1(~i - 2);< 350#rec1ENTRY [2019-11-28 02:56:33,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:33,339 INFO L82 PathProgramCache]: Analyzing trace with hash 874549579, now seen corresponding path program 1 times [2019-11-28 02:56:33,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:33,339 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491545353] [2019-11-28 02:56:33,340 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:33,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:33,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:33,356 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:56:33,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:33,356 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 1 times [2019-11-28 02:56:33,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:33,357 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709942080] [2019-11-28 02:56:33,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:33,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:33,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:33,364 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:56:33,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:33,365 INFO L82 PathProgramCache]: Analyzing trace with hash 434890603, now seen corresponding path program 2 times [2019-11-28 02:56:33,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:33,365 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331174801] [2019-11-28 02:56:33,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:33,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:33,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:33,382 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:56:33,421 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 02:56:33,421 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 02:56:33,421 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 02:56:33,422 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 02:56:33,422 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 02:56:33,422 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:33,422 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 02:56:33,422 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 02:56:33,423 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration2_Loop [2019-11-28 02:56:33,423 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 02:56:33,423 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 02:56:33,426 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:33,429 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:33,432 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:33,434 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:33,438 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:33,441 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:33,487 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 02:56:33,487 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:33,498 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:33,498 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:33,504 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:33,504 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:33,517 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:33,517 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:33,521 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:33,522 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:33,541 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:33,541 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:33,553 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:33,553 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Exception during sending of exit command (exit): Broken pipe No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:33,575 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:33,575 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:33,580 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:33,580 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret1=0} Honda state: {rec1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:33,598 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:33,599 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:33,604 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:33,604 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:33,623 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:33,623 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:33,648 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 02:56:33,649 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:33,658 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 02:56:33,661 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 02:56:33,661 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 02:56:33,662 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 02:56:33,662 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 02:56:33,662 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 02:56:33,662 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:33,662 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 02:56:33,662 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 02:56:33,663 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration2_Loop [2019-11-28 02:56:33,663 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 02:56:33,663 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 02:56:33,665 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:33,668 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:33,673 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:33,677 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:33,680 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:33,687 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:33,733 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 02:56:33,735 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:33,750 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 02:56:33,752 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:33,752 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:33,752 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:33,752 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:33,752 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:33,753 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:33,753 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:33,756 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:33,780 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 02:56:33,782 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:33,782 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:33,783 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:33,783 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:33,784 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:33,784 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:33,785 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 02:56:33,787 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:33,809 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 02:56:33,812 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:33,812 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:33,813 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:33,813 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:33,813 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:33,816 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:33,816 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:33,818 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:33,827 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 02:56:33,829 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:33,829 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:33,829 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:33,829 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:33,830 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:33,830 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:33,831 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:33,832 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:33,841 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 02:56:33,842 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:33,843 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:33,843 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:33,843 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:33,843 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:33,845 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:33,845 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:33,852 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 02:56:33,857 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-28 02:56:33,857 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:33,864 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 02:56:33,864 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 02:56:33,864 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 02:56:33,865 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2019-11-28 02:56:33,875 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:33,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:33,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:33,924 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 02:56:33,927 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:33,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:33,939 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 02:56:33,941 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:33,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 02:56:33,999 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 [2019-11-28 02:56:33,999 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 55 states and 83 transitions. cyclomatic complexity: 32 Second operand 4 states. [2019-11-28 02:56:34,074 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 55 states and 83 transitions. cyclomatic complexity: 32. Second operand 4 states. Result 105 states and 149 transitions. Complement of second has 13 states. [2019-11-28 02:56:34,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-28 02:56:34,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-28 02:56:34,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 17 transitions. [2019-11-28 02:56:34,076 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 8 letters. Loop has 3 letters. [2019-11-28 02:56:34,077 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:34,077 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 11 letters. Loop has 3 letters. [2019-11-28 02:56:34,077 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:34,077 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 8 letters. Loop has 6 letters. [2019-11-28 02:56:34,077 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:34,078 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 105 states and 149 transitions. [2019-11-28 02:56:34,082 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-28 02:56:34,087 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 105 states to 93 states and 137 transitions. [2019-11-28 02:56:34,087 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 37 [2019-11-28 02:56:34,088 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 39 [2019-11-28 02:56:34,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 137 transitions. [2019-11-28 02:56:34,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 02:56:34,089 INFO L688 BuchiCegarLoop]: Abstraction has 93 states and 137 transitions. [2019-11-28 02:56:34,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states and 137 transitions. [2019-11-28 02:56:34,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2019-11-28 02:56:34,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-28 02:56:34,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 129 transitions. [2019-11-28 02:56:34,101 INFO L711 BuchiCegarLoop]: Abstraction has 89 states and 129 transitions. [2019-11-28 02:56:34,101 INFO L591 BuchiCegarLoop]: Abstraction has 89 states and 129 transitions. [2019-11-28 02:56:34,101 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-28 02:56:34,101 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 89 states and 129 transitions. [2019-11-28 02:56:34,103 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-28 02:56:34,103 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 02:56:34,103 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 02:56:34,104 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 02:56:34,104 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-28 02:56:34,105 INFO L794 eck$LassoCheckResult]: Stem: 613#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 614#L25 call main_#t~ret6 := rec2(main_~x~0);< 620#rec2ENTRY ~j := #in~j; 633#L18 assume !(~j <= 0); 615#L20 call #t~ret3 := rec1(~j - 1);< 642#rec1ENTRY ~i := #in~i; 637#L12 assume !(~i <= 0); 577#L14 call #t~ret0 := rec1(~i - 2);< 576#rec1ENTRY ~i := #in~i; 579#L12 assume ~i <= 0;#res := 0; 583#rec1FINAL assume true; 584#rec1EXIT >#27#return; 593#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 595#rec1ENTRY [2019-11-28 02:56:34,105 INFO L796 eck$LassoCheckResult]: Loop: 595#rec1ENTRY ~i := #in~i; 632#L12 assume !(~i <= 0); 589#L14 call #t~ret0 := rec1(~i - 2);< 595#rec1ENTRY [2019-11-28 02:56:34,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:34,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1317996508, now seen corresponding path program 1 times [2019-11-28 02:56:34,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:34,106 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009895453] [2019-11-28 02:56:34,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:34,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:34,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:34,127 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:56:34,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:34,130 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 2 times [2019-11-28 02:56:34,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:34,131 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497122094] [2019-11-28 02:56:34,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:34,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:34,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:34,142 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:56:34,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:34,143 INFO L82 PathProgramCache]: Analyzing trace with hash -157050054, now seen corresponding path program 2 times [2019-11-28 02:56:34,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:34,144 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223137866] [2019-11-28 02:56:34,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:34,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:34,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:34,233 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-28 02:56:34,234 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223137866] [2019-11-28 02:56:34,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 02:56:34,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-28 02:56:34,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806831344] [2019-11-28 02:56:34,277 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 02:56:34,277 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 02:56:34,277 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 02:56:34,278 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 02:56:34,278 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 02:56:34,278 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:34,278 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 02:56:34,278 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 02:56:34,278 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration3_Loop [2019-11-28 02:56:34,279 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 02:56:34,279 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 02:56:34,280 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:34,283 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:34,289 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:34,291 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:34,293 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:34,295 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:34,322 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 02:56:34,322 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:34,327 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:34,327 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:34,331 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:34,331 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:34,338 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:34,338 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:34,347 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 02:56:34,347 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:34,397 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 02:56:34,400 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 02:56:34,400 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 02:56:34,400 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 02:56:34,400 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 02:56:34,400 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 02:56:34,400 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:34,400 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 02:56:34,400 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 02:56:34,401 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration3_Loop [2019-11-28 02:56:34,401 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 02:56:34,401 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 02:56:34,402 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:34,410 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:34,431 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:34,439 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:34,444 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:34,449 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:34,496 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 02:56:34,498 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:34,510 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 02:56:34,512 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:34,512 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:34,512 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:34,513 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:34,513 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:34,514 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:34,514 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:34,516 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:34,524 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 02:56:34,527 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:34,527 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:34,527 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:34,527 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:34,527 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:34,529 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:34,529 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:34,532 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 02:56:34,534 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-28 02:56:34,535 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:34,539 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 02:56:34,540 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 02:56:34,540 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 02:56:34,540 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Exception during sending of exit command (exit): Stream closed [2019-11-28 02:56:34,552 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:34,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:34,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:34,602 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-28 02:56:34,604 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:34,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:34,648 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 02:56:34,648 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:34,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 02:56:34,669 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 [2019-11-28 02:56:34,669 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 89 states and 129 transitions. cyclomatic complexity: 47 Second operand 5 states. [2019-11-28 02:56:34,781 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 89 states and 129 transitions. cyclomatic complexity: 47. Second operand 5 states. Result 134 states and 193 transitions. Complement of second has 14 states. [2019-11-28 02:56:34,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-28 02:56:34,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 02:56:34,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 19 transitions. [2019-11-28 02:56:34,784 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 13 letters. Loop has 3 letters. [2019-11-28 02:56:34,784 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:34,784 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 16 letters. Loop has 3 letters. [2019-11-28 02:56:34,785 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:34,785 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 13 letters. Loop has 6 letters. [2019-11-28 02:56:34,785 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:34,785 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 134 states and 193 transitions. [2019-11-28 02:56:34,789 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-28 02:56:34,794 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 134 states to 122 states and 181 transitions. [2019-11-28 02:56:34,795 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 48 [2019-11-28 02:56:34,795 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 50 [2019-11-28 02:56:34,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 181 transitions. [2019-11-28 02:56:34,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 02:56:34,796 INFO L688 BuchiCegarLoop]: Abstraction has 122 states and 181 transitions. [2019-11-28 02:56:34,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states and 181 transitions. [2019-11-28 02:56:34,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 113. [2019-11-28 02:56:34,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-28 02:56:34,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 165 transitions. [2019-11-28 02:56:34,810 INFO L711 BuchiCegarLoop]: Abstraction has 113 states and 165 transitions. [2019-11-28 02:56:34,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 02:56:34,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 02:56:34,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-28 02:56:34,815 INFO L87 Difference]: Start difference. First operand 113 states and 165 transitions. Second operand 6 states. [2019-11-28 02:56:34,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 02:56:34,867 INFO L93 Difference]: Finished difference Result 123 states and 175 transitions. [2019-11-28 02:56:34,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 02:56:34,868 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 123 states and 175 transitions. [2019-11-28 02:56:34,872 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2019-11-28 02:56:34,878 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 123 states to 121 states and 173 transitions. [2019-11-28 02:56:34,878 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 55 [2019-11-28 02:56:34,878 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 55 [2019-11-28 02:56:34,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 121 states and 173 transitions. [2019-11-28 02:56:34,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 02:56:34,879 INFO L688 BuchiCegarLoop]: Abstraction has 121 states and 173 transitions. [2019-11-28 02:56:34,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states and 173 transitions. [2019-11-28 02:56:34,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 101. [2019-11-28 02:56:34,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-11-28 02:56:34,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 143 transitions. [2019-11-28 02:56:34,900 INFO L711 BuchiCegarLoop]: Abstraction has 101 states and 143 transitions. [2019-11-28 02:56:34,900 INFO L591 BuchiCegarLoop]: Abstraction has 101 states and 143 transitions. [2019-11-28 02:56:34,903 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-28 02:56:34,903 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 101 states and 143 transitions. [2019-11-28 02:56:34,905 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-28 02:56:34,907 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 02:56:34,908 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 02:56:34,909 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 02:56:34,909 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-28 02:56:34,909 INFO L794 eck$LassoCheckResult]: Stem: 1167#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 1168#L25 call main_#t~ret6 := rec2(main_~x~0);< 1174#rec2ENTRY ~j := #in~j; 1185#L18 assume !(~j <= 0); 1146#L20 call #t~ret3 := rec1(~j - 1);< 1184#rec1ENTRY ~i := #in~i; 1183#L12 assume !(~i <= 0); 1156#L14 call #t~ret0 := rec1(~i - 2);< 1181#rec1ENTRY ~i := #in~i; 1179#L12 assume !(~i <= 0); 1161#L14 call #t~ret0 := rec1(~i - 2);< 1178#rec1ENTRY ~i := #in~i; 1180#L12 assume ~i <= 0;#res := 0; 1222#rec1FINAL assume true; 1166#rec1EXIT >#27#return; 1133#L14-1 [2019-11-28 02:56:34,909 INFO L796 eck$LassoCheckResult]: Loop: 1133#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1132#rec1ENTRY ~i := #in~i; 1135#L12 assume ~i <= 0;#res := 0; 1140#rec1FINAL assume true; 1141#rec1EXIT >#29#return; 1154#L14-2 call #t~ret2 := rec1(#t~ret1);< 1163#rec1ENTRY ~i := #in~i; 1204#L12 assume !(~i <= 0); 1157#L14 call #t~ret0 := rec1(~i - 2);< 1163#rec1ENTRY ~i := #in~i; 1204#L12 assume ~i <= 0;#res := 0; 1205#rec1FINAL assume true; 1213#rec1EXIT >#27#return; 1133#L14-1 [2019-11-28 02:56:34,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:34,911 INFO L82 PathProgramCache]: Analyzing trace with hash -377207200, now seen corresponding path program 1 times [2019-11-28 02:56:34,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:34,911 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210335740] [2019-11-28 02:56:34,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:34,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:34,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:34,941 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:56:34,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:34,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1306212703, now seen corresponding path program 1 times [2019-11-28 02:56:34,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:34,943 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712870094] [2019-11-28 02:56:34,943 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:34,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:34,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:34,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:34,998 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-28 02:56:35,002 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712870094] [2019-11-28 02:56:35,002 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926167224] [2019-11-28 02:56:35,003 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 02:56:35,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:35,030 INFO L255 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-28 02:56:35,031 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:35,035 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 02:56:35,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-28 02:56:35,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2019-11-28 02:56:35,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249395606] [2019-11-28 02:56:35,037 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-28 02:56:35,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 02:56:35,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 02:56:35,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-28 02:56:35,038 INFO L87 Difference]: Start difference. First operand 101 states and 143 transitions. cyclomatic complexity: 49 Second operand 6 states. [2019-11-28 02:56:35,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 02:56:35,090 INFO L93 Difference]: Finished difference Result 117 states and 161 transitions. [2019-11-28 02:56:35,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 02:56:35,094 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 117 states and 161 transitions. [2019-11-28 02:56:35,098 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-28 02:56:35,105 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 117 states to 117 states and 161 transitions. [2019-11-28 02:56:35,105 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 53 [2019-11-28 02:56:35,105 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 53 [2019-11-28 02:56:35,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 117 states and 161 transitions. [2019-11-28 02:56:35,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 02:56:35,106 INFO L688 BuchiCegarLoop]: Abstraction has 117 states and 161 transitions. [2019-11-28 02:56:35,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states and 161 transitions. [2019-11-28 02:56:35,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 113. [2019-11-28 02:56:35,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-28 02:56:35,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 157 transitions. [2019-11-28 02:56:35,130 INFO L711 BuchiCegarLoop]: Abstraction has 113 states and 157 transitions. [2019-11-28 02:56:35,130 INFO L591 BuchiCegarLoop]: Abstraction has 113 states and 157 transitions. [2019-11-28 02:56:35,130 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-11-28 02:56:35,130 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 113 states and 157 transitions. [2019-11-28 02:56:35,131 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-28 02:56:35,132 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 02:56:35,132 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 02:56:35,133 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 02:56:35,133 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 02:56:35,134 INFO L794 eck$LassoCheckResult]: Stem: 1445#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; 1446#L25 call main_#t~ret6 := rec2(main_~x~0);< 1458#rec2ENTRY ~j := #in~j; 1471#L18 assume !(~j <= 0); 1422#L20 call #t~ret3 := rec1(~j - 1);< 1470#rec1ENTRY ~i := #in~i; 1469#L12 assume !(~i <= 0); 1418#L14 call #t~ret0 := rec1(~i - 2);< 1467#rec1ENTRY ~i := #in~i; 1440#L12 assume ~i <= 0;#res := 0; 1417#rec1FINAL assume true; 1419#rec1EXIT >#27#return; 1410#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1409#rec1ENTRY ~i := #in~i; 1412#L12 assume ~i <= 0;#res := 0; 1515#rec1FINAL assume true; 1509#rec1EXIT >#29#return; 1441#L14-2 call #t~ret2 := rec1(#t~ret1);< 1442#rec1ENTRY ~i := #in~i; 1510#L12 assume ~i <= 0;#res := 0; 1508#rec1FINAL assume true; 1505#rec1EXIT >#31#return; 1434#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 1435#rec1FINAL assume true; 1464#rec1EXIT >#33#return; 1404#L20-1 [2019-11-28 02:56:35,134 INFO L796 eck$LassoCheckResult]: Loop: 1404#L20-1 call #t~ret4 := rec2(#t~ret3);< 1403#rec2ENTRY ~j := #in~j; 1405#L18 assume !(~j <= 0); 1452#L20 call #t~ret3 := rec1(~j - 1);< 1454#rec1ENTRY ~i := #in~i; 1512#L12 assume !(~i <= 0); 1447#L14 call #t~ret0 := rec1(~i - 2);< 1454#rec1ENTRY ~i := #in~i; 1512#L12 assume ~i <= 0;#res := 0; 1511#rec1FINAL assume true; 1507#rec1EXIT >#27#return; 1411#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1409#rec1ENTRY ~i := #in~i; 1412#L12 assume ~i <= 0;#res := 0; 1515#rec1FINAL assume true; 1509#rec1EXIT >#29#return; 1506#L14-2 call #t~ret2 := rec1(#t~ret1);< 1442#rec1ENTRY ~i := #in~i; 1510#L12 assume ~i <= 0;#res := 0; 1508#rec1FINAL assume true; 1505#rec1EXIT >#31#return; 1463#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 1475#rec1FINAL assume true; 1461#rec1EXIT >#33#return; 1404#L20-1 [2019-11-28 02:56:35,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:35,134 INFO L82 PathProgramCache]: Analyzing trace with hash -790062692, now seen corresponding path program 1 times [2019-11-28 02:56:35,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:35,135 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926658723] [2019-11-28 02:56:35,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:35,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:35,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:35,163 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:56:35,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:35,163 INFO L82 PathProgramCache]: Analyzing trace with hash 125202860, now seen corresponding path program 1 times [2019-11-28 02:56:35,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:35,166 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460210195] [2019-11-28 02:56:35,166 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:35,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:35,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:35,188 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:56:35,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:35,189 INFO L82 PathProgramCache]: Analyzing trace with hash -2019382713, now seen corresponding path program 1 times [2019-11-28 02:56:35,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:35,189 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578599988] [2019-11-28 02:56:35,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:35,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:35,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:35,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:35,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:35,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:35,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:35,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:35,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:35,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:35,385 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-11-28 02:56:35,385 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578599988] [2019-11-28 02:56:35,385 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155663058] [2019-11-28 02:56:35,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 02:56:35,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:35,427 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-28 02:56:35,431 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:35,452 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-11-28 02:56:35,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 02:56:35,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-28 02:56:35,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209594949] [2019-11-28 02:56:35,710 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 02:56:35,710 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 02:56:35,710 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 02:56:35,710 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 02:56:35,710 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 02:56:35,710 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:35,710 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 02:56:35,710 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 02:56:35,710 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration5_Loop [2019-11-28 02:56:35,711 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 02:56:35,711 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 02:56:35,712 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:35,721 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:35,724 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:35,770 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 02:56:35,771 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:35,782 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:35,782 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:35,799 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 02:56:35,799 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:39,031 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 02:56:39,034 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 02:56:39,034 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 02:56:39,034 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 02:56:39,034 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 02:56:39,034 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 02:56:39,034 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:39,035 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 02:56:39,035 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 02:56:39,035 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration5_Loop [2019-11-28 02:56:39,035 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 02:56:39,035 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 02:56:39,036 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:39,037 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:39,038 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:39,119 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 02:56:39,120 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:39,127 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 02:56:39,128 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:39,128 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:39,129 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:39,129 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:39,129 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:39,130 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:39,130 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 02:56:39,132 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:39,137 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 02:56:39,139 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:39,139 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:39,139 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:39,139 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:39,139 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:39,142 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:39,142 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 02:56:39,144 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:39,149 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 02:56:39,150 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:39,150 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:39,151 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:39,151 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:39,151 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:39,153 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:39,154 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 02:56:39,159 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 02:56:39,166 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 02:56:39,166 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:39,171 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 02:56:39,171 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 02:56:39,171 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 02:56:39,171 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#t~ret3) = 1*rec2_#t~ret3 Supporting invariants [] [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Exception during sending of exit command (exit): Broken pipe [2019-11-28 02:56:39,173 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 02:56:39,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:39,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:39,226 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 02:56:39,235 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:39,268 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:39,274 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:39,279 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:39,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:39,312 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-28 02:56:39,315 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:39,453 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-28 02:56:39,454 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2019-11-28 02:56:39,454 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 157 transitions. cyclomatic complexity: 51 Second operand 11 states. [2019-11-28 02:56:39,980 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 157 transitions. cyclomatic complexity: 51. Second operand 11 states. Result 584 states and 903 transitions. Complement of second has 45 states. [2019-11-28 02:56:39,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2019-11-28 02:56:39,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-28 02:56:39,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 52 transitions. [2019-11-28 02:56:39,982 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 25 letters. Loop has 24 letters. [2019-11-28 02:56:39,983 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:39,983 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 49 letters. Loop has 24 letters. [2019-11-28 02:56:39,984 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:39,984 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 25 letters. Loop has 48 letters. [2019-11-28 02:56:39,985 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:39,986 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 584 states and 903 transitions. [2019-11-28 02:56:40,002 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2019-11-28 02:56:40,019 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 584 states to 432 states and 649 transitions. [2019-11-28 02:56:40,019 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 140 [2019-11-28 02:56:40,022 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 141 [2019-11-28 02:56:40,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 432 states and 649 transitions. [2019-11-28 02:56:40,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 02:56:40,023 INFO L688 BuchiCegarLoop]: Abstraction has 432 states and 649 transitions. [2019-11-28 02:56:40,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states and 649 transitions. [2019-11-28 02:56:40,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 383. [2019-11-28 02:56:40,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2019-11-28 02:56:40,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 534 transitions. [2019-11-28 02:56:40,058 INFO L711 BuchiCegarLoop]: Abstraction has 383 states and 534 transitions. [2019-11-28 02:56:40,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 02:56:40,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-28 02:56:40,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-28 02:56:40,059 INFO L87 Difference]: Start difference. First operand 383 states and 534 transitions. Second operand 12 states. [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Exception during sending of exit command (exit): Broken pipe [2019-11-28 02:56:40,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 02:56:40,304 INFO L93 Difference]: Finished difference Result 442 states and 645 transitions. [2019-11-28 02:56:40,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-28 02:56:40,304 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 442 states and 645 transitions. [2019-11-28 02:56:40,312 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2019-11-28 02:56:40,319 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 442 states to 349 states and 495 transitions. [2019-11-28 02:56:40,319 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 131 [2019-11-28 02:56:40,320 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 135 [2019-11-28 02:56:40,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 349 states and 495 transitions. [2019-11-28 02:56:40,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 02:56:40,322 INFO L688 BuchiCegarLoop]: Abstraction has 349 states and 495 transitions. [2019-11-28 02:56:40,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states and 495 transitions. [2019-11-28 02:56:40,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 314. [2019-11-28 02:56:40,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2019-11-28 02:56:40,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 415 transitions. [2019-11-28 02:56:40,341 INFO L711 BuchiCegarLoop]: Abstraction has 314 states and 415 transitions. [2019-11-28 02:56:40,341 INFO L591 BuchiCegarLoop]: Abstraction has 314 states and 415 transitions. [2019-11-28 02:56:40,341 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-11-28 02:56:40,341 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 314 states and 415 transitions. [2019-11-28 02:56:40,344 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2019-11-28 02:56:40,344 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 02:56:40,344 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 02:56:40,346 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 02:56:40,347 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-28 02:56:40,348 INFO L794 eck$LassoCheckResult]: Stem: 3437#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; 3438#L25 call main_#t~ret6 := rec2(main_~x~0);< 3454#rec2ENTRY ~j := #in~j; 3476#L18 assume !(~j <= 0); 3456#L20 call #t~ret3 := rec1(~j - 1);< 3474#rec1ENTRY ~i := #in~i; 3490#L12 assume !(~i <= 0); 3483#L14 call #t~ret0 := rec1(~i - 2);< 3489#rec1ENTRY ~i := #in~i; 3494#L12 assume ~i <= 0;#res := 0; 3548#rec1FINAL assume true; 3545#rec1EXIT >#27#return; 3540#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 3541#rec1ENTRY ~i := #in~i; 3544#L12 assume ~i <= 0;#res := 0; 3543#rec1FINAL assume true; 3539#rec1EXIT >#29#return; 3535#L14-2 call #t~ret2 := rec1(#t~ret1);< 3537#rec1ENTRY ~i := #in~i; 3542#L12 assume ~i <= 0;#res := 0; 3538#rec1FINAL assume true; 3536#rec1EXIT >#31#return; 3532#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 3568#rec1FINAL assume true; 3455#rec1EXIT >#33#return; 3386#L20-1 call #t~ret4 := rec2(#t~ret3);< 3385#rec2ENTRY ~j := #in~j; 3387#L18 assume !(~j <= 0); 3521#L20 call #t~ret3 := rec1(~j - 1);< 3461#rec1ENTRY ~i := #in~i; 3567#L12 assume !(~i <= 0); 3423#L14 call #t~ret0 := rec1(~i - 2);< 3440#rec1ENTRY [2019-11-28 02:56:40,348 INFO L796 eck$LassoCheckResult]: Loop: 3440#rec1ENTRY ~i := #in~i; 3553#L12 assume !(~i <= 0); 3420#L14 call #t~ret0 := rec1(~i - 2);< 3440#rec1ENTRY [2019-11-28 02:56:40,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:40,349 INFO L82 PathProgramCache]: Analyzing trace with hash -744961728, now seen corresponding path program 2 times [2019-11-28 02:56:40,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:40,349 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586232683] [2019-11-28 02:56:40,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:40,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:40,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:40,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:40,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:40,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:40,463 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-28 02:56:40,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586232683] [2019-11-28 02:56:40,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671615458] [2019-11-28 02:56:40,464 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 02:56:40,494 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 02:56:40,494 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 02:56:40,495 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-28 02:56:40,497 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:40,504 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-28 02:56:40,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 02:56:40,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2019-11-28 02:56:40,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113802660] [2019-11-28 02:56:40,506 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 02:56:40,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:40,506 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 3 times [2019-11-28 02:56:40,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:40,507 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927437098] [2019-11-28 02:56:40,507 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:40,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:40,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:40,511 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:56:40,533 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 02:56:40,533 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 02:56:40,534 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 02:56:40,534 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 02:56:40,534 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 02:56:40,534 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:40,534 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 02:56:40,534 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 02:56:40,534 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration6_Loop [2019-11-28 02:56:40,534 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 02:56:40,534 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 02:56:40,535 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:40,539 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:40,544 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:40,551 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:40,553 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:40,554 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:40,578 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 02:56:40,578 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:40,587 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:40,587 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:40,591 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:40,591 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:40,599 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:40,599 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:40,609 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 02:56:40,609 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:40,665 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 02:56:40,667 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 02:56:40,667 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 02:56:40,667 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 02:56:40,667 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 02:56:40,667 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 02:56:40,667 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:40,668 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 02:56:40,668 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 02:56:40,668 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration6_Loop [2019-11-28 02:56:40,668 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 02:56:40,668 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 02:56:40,669 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:40,673 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:40,678 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:40,681 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:40,683 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:40,684 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:40,711 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 02:56:40,712 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:40,718 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 02:56:40,722 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:40,722 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:40,722 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:40,722 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:40,723 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:40,723 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:40,723 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 02:56:40,731 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 Starting monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:40,742 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 02:56:40,744 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:40,744 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:40,744 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:40,744 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:40,745 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:40,746 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:40,746 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:40,748 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 02:56:40,750 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-28 02:56:40,750 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:40,755 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 02:56:40,755 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 02:56:40,755 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 02:56:40,755 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2019-11-28 02:56:40,758 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:40,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:40,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:40,809 INFO L255 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-28 02:56:40,816 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:40,837 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:40,844 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:40,850 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:40,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:40,865 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 02:56:40,865 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:40,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 02:56:40,883 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 [2019-11-28 02:56:40,883 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114 Second operand 5 states. [2019-11-28 02:56:40,961 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114. Second operand 5 states. Result 348 states and 455 transitions. Complement of second has 14 states. [2019-11-28 02:56:40,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-28 02:56:40,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 02:56:40,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 17 transitions. [2019-11-28 02:56:40,964 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 32 letters. Loop has 3 letters. [2019-11-28 02:56:40,965 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:40,965 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 02:56:40,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:41,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:41,020 INFO L255 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-28 02:56:41,023 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:41,044 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:41,050 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:41,060 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:41,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:41,077 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 02:56:41,078 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:41,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 02:56:41,098 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 [2019-11-28 02:56:41,098 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114 Second operand 5 states. [2019-11-28 02:56:41,177 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114. Second operand 5 states. Result 348 states and 455 transitions. Complement of second has 14 states. [2019-11-28 02:56:41,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-28 02:56:41,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 02:56:41,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 17 transitions. [2019-11-28 02:56:41,178 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 32 letters. Loop has 3 letters. [2019-11-28 02:56:41,179 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:41,179 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 02:56:41,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:41,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:41,232 INFO L255 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-28 02:56:41,238 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:41,255 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:41,259 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:41,266 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:41,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:41,276 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 02:56:41,276 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:41,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 02:56:41,295 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 [2019-11-28 02:56:41,295 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114 Second operand 5 states. [2019-11-28 02:56:41,406 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114. Second operand 5 states. Result 485 states and 616 transitions. Complement of second has 16 states. [2019-11-28 02:56:41,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-28 02:56:41,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 02:56:41,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 24 transitions. [2019-11-28 02:56:41,408 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 32 letters. Loop has 3 letters. [2019-11-28 02:56:41,408 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:41,408 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 35 letters. Loop has 3 letters. [2019-11-28 02:56:41,409 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:41,409 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 32 letters. Loop has 6 letters. [2019-11-28 02:56:41,409 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:41,409 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 485 states and 616 transitions. [2019-11-28 02:56:41,417 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 26 [2019-11-28 02:56:41,425 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 485 states to 395 states and 526 transitions. [2019-11-28 02:56:41,425 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 129 [2019-11-28 02:56:41,426 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 136 [2019-11-28 02:56:41,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 395 states and 526 transitions. [2019-11-28 02:56:41,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 02:56:41,427 INFO L688 BuchiCegarLoop]: Abstraction has 395 states and 526 transitions. [2019-11-28 02:56:41,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states and 526 transitions. [2019-11-28 02:56:41,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 351. [2019-11-28 02:56:41,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2019-11-28 02:56:41,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 456 transitions. [2019-11-28 02:56:41,442 INFO L711 BuchiCegarLoop]: Abstraction has 351 states and 456 transitions. [2019-11-28 02:56:41,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 02:56:41,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-28 02:56:41,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-11-28 02:56:41,443 INFO L87 Difference]: Start difference. First operand 351 states and 456 transitions. Second operand 10 states. [2019-11-28 02:56:41,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 02:56:41,553 INFO L93 Difference]: Finished difference Result 378 states and 513 transitions. [2019-11-28 02:56:41,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-28 02:56:41,554 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 378 states and 513 transitions. [2019-11-28 02:56:41,560 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2019-11-28 02:56:41,562 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 378 states to 104 states and 142 transitions. [2019-11-28 02:56:41,562 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 98 [2019-11-28 02:56:41,562 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 98 [2019-11-28 02:56:41,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 104 states and 142 transitions. [2019-11-28 02:56:41,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 02:56:41,563 INFO L688 BuchiCegarLoop]: Abstraction has 104 states and 142 transitions. [2019-11-28 02:56:41,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states and 142 transitions. [2019-11-28 02:56:41,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 86. [2019-11-28 02:56:41,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-28 02:56:41,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2019-11-28 02:56:41,568 INFO L711 BuchiCegarLoop]: Abstraction has 86 states and 106 transitions. [2019-11-28 02:56:41,568 INFO L591 BuchiCegarLoop]: Abstraction has 86 states and 106 transitions. [2019-11-28 02:56:41,568 INFO L424 BuchiCegarLoop]: ======== Iteration 7============ [2019-11-28 02:56:41,568 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 86 states and 106 transitions. [2019-11-28 02:56:41,569 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2019-11-28 02:56:41,569 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 02:56:41,569 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 02:56:41,570 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-11-28 02:56:41,570 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-28 02:56:41,570 INFO L794 eck$LassoCheckResult]: Stem: 6179#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 6180#L25 call main_#t~ret6 := rec2(main_~x~0);< 6185#rec2ENTRY ~j := #in~j; 6207#L18 assume !(~j <= 0); 6204#L20 call #t~ret3 := rec1(~j - 1);< 6206#rec1ENTRY ~i := #in~i; 6205#L12 assume !(~i <= 0); 6175#L14 call #t~ret0 := rec1(~i - 2);< 6187#rec1ENTRY ~i := #in~i; 6156#L12 assume !(~i <= 0); 6155#L14 [2019-11-28 02:56:41,570 INFO L796 eck$LassoCheckResult]: Loop: 6155#L14 call #t~ret0 := rec1(~i - 2);< 6154#rec1ENTRY ~i := #in~i; 6156#L12 assume !(~i <= 0); 6155#L14 [2019-11-28 02:56:41,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:41,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1371444593, now seen corresponding path program 3 times [2019-11-28 02:56:41,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:41,571 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520728048] [2019-11-28 02:56:41,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:41,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:41,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:41,577 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:56:41,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:41,578 INFO L82 PathProgramCache]: Analyzing trace with hash 54781, now seen corresponding path program 4 times [2019-11-28 02:56:41,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:41,578 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074325249] [2019-11-28 02:56:41,578 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:41,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:41,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:41,582 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:56:41,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:41,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1318041775, now seen corresponding path program 4 times [2019-11-28 02:56:41,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:41,583 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038186862] [2019-11-28 02:56:41,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:41,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:41,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:41,592 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:56:41,632 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 02:56:41,632 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 02:56:41,632 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 02:56:41,632 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 02:56:41,632 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 02:56:41,632 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:41,632 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 02:56:41,633 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 02:56:41,633 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration7_Loop [2019-11-28 02:56:41,633 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 02:56:41,633 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 02:56:41,634 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:41,643 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:41,645 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:41,647 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:41,649 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:41,683 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 02:56:41,683 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:41,691 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:41,692 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:41,703 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 02:56:41,703 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:47,322 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 02:56:47,324 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 02:56:47,324 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 02:56:47,324 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 02:56:47,324 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 02:56:47,324 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 02:56:47,324 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:47,325 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 02:56:47,325 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 02:56:47,325 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration7_Loop [2019-11-28 02:56:47,325 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 02:56:47,325 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 02:56:47,327 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:47,339 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:47,341 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:47,343 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:47,344 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:47,390 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 02:56:47,390 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:47,401 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 02:56:47,403 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:47,403 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:47,403 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:47,403 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:47,403 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:47,405 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:47,405 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:47,409 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 02:56:47,412 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-28 02:56:47,412 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:47,419 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 02:56:47,419 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 02:56:47,420 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 02:56:47,420 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_~i) = 1*rec1_~i Supporting invariants [] [2019-11-28 02:56:47,422 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:47,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:47,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:47,455 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 02:56:47,456 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:47,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:47,468 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 02:56:47,468 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:47,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 02:56:47,490 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 [2019-11-28 02:56:47,490 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 86 states and 106 transitions. cyclomatic complexity: 23 Second operand 4 states. [2019-11-28 02:56:47,533 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 86 states and 106 transitions. cyclomatic complexity: 23. Second operand 4 states. Result 100 states and 124 transitions. Complement of second has 11 states. [2019-11-28 02:56:47,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2019-11-28 02:56:47,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-28 02:56:47,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2019-11-28 02:56:47,535 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 10 letters. Loop has 3 letters. [2019-11-28 02:56:47,535 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:47,535 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 13 letters. Loop has 3 letters. [2019-11-28 02:56:47,535 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:47,536 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 10 letters. Loop has 6 letters. [2019-11-28 02:56:47,536 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:47,536 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 100 states and 124 transitions. [2019-11-28 02:56:47,538 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2019-11-28 02:56:47,540 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 100 states to 94 states and 117 transitions. [2019-11-28 02:56:47,540 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 83 [2019-11-28 02:56:47,540 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 84 [2019-11-28 02:56:47,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 117 transitions. [2019-11-28 02:56:47,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 02:56:47,541 INFO L688 BuchiCegarLoop]: Abstraction has 94 states and 117 transitions. [2019-11-28 02:56:47,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states and 117 transitions. [2019-11-28 02:56:47,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2019-11-28 02:56:47,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-28 02:56:47,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 114 transitions. [2019-11-28 02:56:47,546 INFO L711 BuchiCegarLoop]: Abstraction has 92 states and 114 transitions. [2019-11-28 02:56:47,547 INFO L591 BuchiCegarLoop]: Abstraction has 92 states and 114 transitions. [2019-11-28 02:56:47,547 INFO L424 BuchiCegarLoop]: ======== Iteration 8============ [2019-11-28 02:56:47,547 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 92 states and 114 transitions. [2019-11-28 02:56:47,548 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2019-11-28 02:56:47,548 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 02:56:47,548 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 02:56:47,550 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 02:56:47,550 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2019-11-28 02:56:47,551 INFO L794 eck$LassoCheckResult]: Stem: 6436#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 6405#L25 call main_#t~ret6 := rec2(main_~x~0);< 6404#rec2ENTRY ~j := #in~j; 6406#L18 assume !(~j <= 0); 6439#L20 call #t~ret3 := rec1(~j - 1);< 6440#rec1ENTRY ~i := #in~i; 6461#L12 assume !(~i <= 0); 6424#L14 call #t~ret0 := rec1(~i - 2);< 6458#rec1ENTRY ~i := #in~i; 6475#L12 assume !(~i <= 0); 6408#L14 call #t~ret0 := rec1(~i - 2);< 6407#rec1ENTRY ~i := #in~i; 6409#L12 assume ~i <= 0;#res := 0; 6495#rec1FINAL assume true; 6493#rec1EXIT >#27#return; 6417#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6423#rec1ENTRY ~i := #in~i; 6489#L12 assume ~i <= 0;#res := 0; 6488#rec1FINAL assume true; 6466#rec1EXIT >#29#return; 6467#L14-2 call #t~ret2 := rec1(#t~ret1);< 6479#rec1ENTRY ~i := #in~i; 6485#L12 assume ~i <= 0;#res := 0; 6484#rec1FINAL assume true; 6477#rec1EXIT >#31#return; 6476#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 6464#rec1FINAL assume true; 6465#rec1EXIT >#27#return; 6418#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6454#rec1ENTRY [2019-11-28 02:56:47,551 INFO L796 eck$LassoCheckResult]: Loop: 6454#rec1ENTRY ~i := #in~i; 6482#L12 assume !(~i <= 0); 6422#L14 call #t~ret0 := rec1(~i - 2);< 6437#rec1ENTRY ~i := #in~i; 6481#L12 assume !(~i <= 0); 6415#L14 call #t~ret0 := rec1(~i - 2);< 6438#rec1ENTRY ~i := #in~i; 6435#L12 assume ~i <= 0;#res := 0; 6414#rec1FINAL assume true; 6416#rec1EXIT >#27#return; 6417#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6423#rec1ENTRY ~i := #in~i; 6489#L12 assume ~i <= 0;#res := 0; 6488#rec1FINAL assume true; 6466#rec1EXIT >#29#return; 6467#L14-2 call #t~ret2 := rec1(#t~ret1);< 6479#rec1ENTRY ~i := #in~i; 6485#L12 assume ~i <= 0;#res := 0; 6484#rec1FINAL assume true; 6477#rec1EXIT >#31#return; 6476#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 6464#rec1FINAL assume true; 6465#rec1EXIT >#27#return; 6419#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6454#rec1ENTRY [2019-11-28 02:56:47,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:47,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1733863270, now seen corresponding path program 1 times [2019-11-28 02:56:47,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:47,552 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32396475] [2019-11-28 02:56:47,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:47,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:47,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:47,577 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:56:47,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:47,578 INFO L82 PathProgramCache]: Analyzing trace with hash -165506564, now seen corresponding path program 1 times [2019-11-28 02:56:47,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:47,579 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23599764] [2019-11-28 02:56:47,579 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:47,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:47,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:47,594 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:56:47,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:47,595 INFO L82 PathProgramCache]: Analyzing trace with hash 2126813793, now seen corresponding path program 2 times [2019-11-28 02:56:47,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:47,596 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856185044] [2019-11-28 02:56:47,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:47,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:47,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:47,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:47,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:47,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:47,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:47,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:47,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:47,715 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 43 proven. 32 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2019-11-28 02:56:47,716 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856185044] [2019-11-28 02:56:47,716 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891645358] [2019-11-28 02:56:47,716 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 02:56:47,750 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 02:56:47,751 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 02:56:47,752 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 02:56:47,753 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:47,760 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-11-28 02:56:47,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 02:56:47,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 11 [2019-11-28 02:56:47,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560895008] [2019-11-28 02:56:48,012 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 02:56:48,013 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 02:56:48,013 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 02:56:48,013 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 02:56:48,013 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 02:56:48,013 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:48,013 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 02:56:48,013 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 02:56:48,014 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration8_Loop [2019-11-28 02:56:48,014 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 02:56:48,014 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 02:56:48,015 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:48,017 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:48,021 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:48,022 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:48,029 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:48,031 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:48,077 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 02:56:48,077 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:48,081 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:48,081 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 02:56:48,084 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:48,084 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:48,090 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:48,090 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:48,098 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:48,099 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:48,107 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:48,107 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 02:56:48,111 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:48,111 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:48,121 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:48,122 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:48,134 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 02:56:48,134 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 02:56:48,140 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 02:56:48,146 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 02:56:48,146 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 02:56:48,146 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 02:56:48,146 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 02:56:48,146 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 02:56:48,147 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:48,147 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 02:56:48,147 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 02:56:48,147 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration8_Loop [2019-11-28 02:56:48,147 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 02:56:48,147 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 02:56:48,148 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:48,150 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:48,152 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:48,159 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:48,161 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:48,163 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:48,207 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 02:56:48,207 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:48,213 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 02:56:48,215 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:48,215 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:48,215 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:48,215 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:48,215 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:48,216 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:48,216 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:48,219 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:48,225 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 02:56:48,227 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:48,227 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:48,227 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:48,227 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:48,227 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:48,228 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:48,228 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:48,230 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:48,236 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 02:56:48,238 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:48,238 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:48,238 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:48,238 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:48,238 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:48,239 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:48,239 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:48,242 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 02:56:48,245 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 02:56:48,245 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:48,249 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 02:56:48,249 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 02:56:48,250 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 02:56:48,250 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2019-11-28 02:56:48,252 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 02:56:48,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:48,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:48,312 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-28 02:56:48,318 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:48,344 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:48,347 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:48,355 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:48,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:48,391 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-28 02:56:48,393 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:48,538 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-28 02:56:48,538 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2019-11-28 02:56:48,540 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26 Second operand 11 states. [2019-11-28 02:56:48,653 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26. Second operand 11 states. Result 100 states and 122 transitions. Complement of second has 7 states. [2019-11-28 02:56:48,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2019-11-28 02:56:48,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-28 02:56:48,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2019-11-28 02:56:48,654 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 29 letters. Loop has 24 letters. [2019-11-28 02:56:48,654 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:48,654 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 02:56:48,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:48,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:48,702 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-28 02:56:48,704 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:48,725 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:48,727 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:48,729 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:48,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:48,754 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-28 02:56:48,755 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:48,852 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-28 02:56:48,853 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 9 loop predicates [2019-11-28 02:56:48,853 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26 Second operand 11 states. [2019-11-28 02:56:48,915 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26. Second operand 11 states. Result 100 states and 122 transitions. Complement of second has 7 states. [2019-11-28 02:56:48,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2019-11-28 02:56:48,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-28 02:56:48,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2019-11-28 02:56:48,916 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 29 letters. Loop has 24 letters. [2019-11-28 02:56:48,916 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:48,916 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 02:56:48,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:48,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:48,962 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-28 02:56:48,963 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:48,989 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:48,991 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:48,998 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:49,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:49,031 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-28 02:56:49,033 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:49,159 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-28 02:56:49,160 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 9 loop predicates [2019-11-28 02:56:49,160 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26 Second operand 11 states. [2019-11-28 02:56:49,471 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26. Second operand 11 states. Result 257 states and 303 transitions. Complement of second has 31 states. [2019-11-28 02:56:49,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2019-11-28 02:56:49,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-28 02:56:49,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 38 transitions. [2019-11-28 02:56:49,475 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 38 transitions. Stem has 29 letters. Loop has 24 letters. [2019-11-28 02:56:49,479 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:49,479 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 02:56:49,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:49,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:49,528 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-28 02:56:49,529 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:49,545 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:49,547 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:49,549 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:49,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:49,579 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-28 02:56:49,581 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:49,679 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-28 02:56:49,680 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and with honda bouncer for loop.2 stem predicates 9 loop predicates [2019-11-28 02:56:49,680 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26 Second operand 11 states. [2019-11-28 02:56:50,239 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26. Second operand 11 states. Result 409 states and 515 transitions. Complement of second has 80 states. [2019-11-28 02:56:50,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 15 states 2 stem states 12 non-accepting loop states 1 accepting loop states [2019-11-28 02:56:50,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-28 02:56:50,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 49 transitions. [2019-11-28 02:56:50,241 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 49 transitions. Stem has 29 letters. Loop has 24 letters. [2019-11-28 02:56:50,242 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:50,242 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 49 transitions. Stem has 53 letters. Loop has 24 letters. [2019-11-28 02:56:50,242 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:50,243 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 49 transitions. Stem has 29 letters. Loop has 48 letters. [2019-11-28 02:56:50,244 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:50,244 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 409 states and 515 transitions. [2019-11-28 02:56:50,250 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 62 [2019-11-28 02:56:50,254 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 409 states to 253 states and 345 transitions. [2019-11-28 02:56:50,254 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 154 [2019-11-28 02:56:50,254 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 164 [2019-11-28 02:56:50,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 253 states and 345 transitions. [2019-11-28 02:56:50,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 02:56:50,255 INFO L688 BuchiCegarLoop]: Abstraction has 253 states and 345 transitions. [2019-11-28 02:56:50,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states and 345 transitions. [2019-11-28 02:56:50,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 216. [2019-11-28 02:56:50,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-11-28 02:56:50,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 270 transitions. [2019-11-28 02:56:50,265 INFO L711 BuchiCegarLoop]: Abstraction has 216 states and 270 transitions. [2019-11-28 02:56:50,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 02:56:50,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-28 02:56:50,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2019-11-28 02:56:50,266 INFO L87 Difference]: Start difference. First operand 216 states and 270 transitions. Second operand 11 states. [2019-11-28 02:56:50,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 02:56:50,392 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2019-11-28 02:56:50,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-28 02:56:50,392 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 35 states and 37 transitions. [2019-11-28 02:56:50,393 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 02:56:50,393 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 35 states to 0 states and 0 transitions. [2019-11-28 02:56:50,393 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-28 02:56:50,393 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-28 02:56:50,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-28 02:56:50,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-28 02:56:50,394 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 02:56:50,394 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 02:56:50,394 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 02:56:50,394 INFO L424 BuchiCegarLoop]: ======== Iteration 9============ [2019-11-28 02:56:50,394 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-11-28 02:56:50,394 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 02:56:50,394 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-11-28 02:56:50,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 02:56:50 BoogieIcfgContainer [2019-11-28 02:56:50,401 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-28 02:56:50,402 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 02:56:50,402 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 02:56:50,402 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 02:56:50,403 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:56:31" (3/4) ... [2019-11-28 02:56:50,407 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-28 02:56:50,407 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 02:56:50,409 INFO L168 Benchmark]: Toolchain (without parser) took 19942.91 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 327.2 MB). Free memory was 953.6 MB in the beginning and 1.0 GB in the end (delta: -57.6 MB). Peak memory consumption was 269.5 MB. Max. memory is 11.5 GB. [2019-11-28 02:56:50,410 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 02:56:50,410 INFO L168 Benchmark]: CACSL2BoogieTranslator took 329.91 ms. Allocated memory is still 1.0 GB. Free memory was 953.6 MB in the beginning and 942.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 02:56:50,411 INFO L168 Benchmark]: Boogie Procedure Inliner took 96.56 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.2 MB). Free memory was 942.9 MB in the beginning and 1.1 GB in the end (delta: -187.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-28 02:56:50,411 INFO L168 Benchmark]: Boogie Preprocessor took 20.62 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 02:56:50,412 INFO L168 Benchmark]: RCFGBuilder took 303.52 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.2 MB). Peak memory consumption was 24.2 MB. Max. memory is 11.5 GB. [2019-11-28 02:56:50,413 INFO L168 Benchmark]: BuchiAutomizer took 19182.16 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 192.9 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 87.1 MB). Peak memory consumption was 280.1 MB. Max. memory is 11.5 GB. [2019-11-28 02:56:50,413 INFO L168 Benchmark]: Witness Printer took 5.27 ms. Allocated memory is still 1.4 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 02:56:50,416 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 329.91 ms. Allocated memory is still 1.0 GB. Free memory was 953.6 MB in the beginning and 942.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 96.56 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.2 MB). Free memory was 942.9 MB in the beginning and 1.1 GB in the end (delta: -187.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.62 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 303.52 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.2 MB). Peak memory consumption was 24.2 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 19182.16 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 192.9 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 87.1 MB). Peak memory consumption was 280.1 MB. Max. memory is 11.5 GB. * Witness Printer took 5.27 ms. Allocated memory is still 1.4 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 12 terminating modules (5 trivial, 5 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(j) and consists of 11 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 deterministic module has affine ranking function org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@735854de and consists of 11 locations. One deterministic module has affine ranking function 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 15 locations. 5 modules have a trivial ranking function, the largest among these consists of 12 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 19.1s and 9 iterations. TraceHistogramMax:5. Analysis of lassos took 13.0s. Construction of modules took 1.2s. Büchi inclusion checks took 4.2s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 11. Automata minimization 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 249 StatesRemovedByMinimization, 11 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had 314 states and ocurred in iteration 5. Nontrivial modules had stage [5, 0, 1, 1, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 38/58 HoareTripleCheckerStatistics: 284 SDtfs, 352 SDslu, 489 SDs, 0 SdLazy, 977 SolverSat, 338 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time LassoAnalysisResults: nont0 unkn0 SFLI1 SFLT3 conc0 concLT3 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital12 mio100 ax100 hnf98 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq154 hnf92 smp100 dnf100 smp100 tf111 neg100 sie110 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 32ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 14 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 7 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 9.3s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...