./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 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_1d.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 0837a1e1d82be1b28ccf3514392f1b01c88a9160 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-30f4e4a [2019-11-28 02:56:34,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 02:56:34,076 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 02:56:34,094 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 02:56:34,094 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 02:56:34,097 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 02:56:34,099 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 02:56:34,116 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 02:56:34,118 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 02:56:34,122 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 02:56:34,124 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 02:56:34,125 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 02:56:34,127 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 02:56:34,130 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 02:56:34,132 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 02:56:34,134 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 02:56:34,136 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 02:56:34,140 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 02:56:34,142 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 02:56:34,147 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 02:56:34,152 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 02:56:34,154 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 02:56:34,157 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 02:56:34,158 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 02:56:34,163 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 02:56:34,163 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 02:56:34,164 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 02:56:34,166 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 02:56:34,166 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 02:56:34,168 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 02:56:34,169 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 02:56:34,169 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 02:56:34,170 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 02:56:34,171 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 02:56:34,173 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 02:56:34,173 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 02:56:34,175 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 02:56:34,175 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 02:56:34,175 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 02:56:34,177 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 02:56:34,178 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 02:56:34,179 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-11-28 02:56:34,195 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 02:56:34,196 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 02:56:34,197 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 02:56:34,197 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 02:56:34,198 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 02:56:34,198 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-28 02:56:34,198 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-28 02:56:34,199 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-28 02:56:34,199 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-28 02:56:34,199 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-28 02:56:34,199 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-28 02:56:34,200 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 02:56:34,200 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-28 02:56:34,203 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 02:56:34,203 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 02:56:34,203 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-28 02:56:34,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-28 02:56:34,204 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-28 02:56:34,204 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 02:56:34,204 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-28 02:56:34,205 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 02:56:34,205 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-28 02:56:34,205 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 02:56:34,206 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 02:56:34,206 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-28 02:56:34,206 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 02:56:34,206 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 02:56:34,207 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-28 02:56:34,208 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-28 02:56:34,208 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 -> 0837a1e1d82be1b28ccf3514392f1b01c88a9160 [2019-11-28 02:56:34,552 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 02:56:34,573 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 02:56:34,576 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 02:56:34,578 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 02:56:34,579 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 02:56:34,580 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c [2019-11-28 02:56:34,650 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6400f291/92f73283108b4c759291c7ce3fa26774/FLAG0286c92d7 [2019-11-28 02:56:35,092 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 02:56:35,093 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c [2019-11-28 02:56:35,098 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6400f291/92f73283108b4c759291c7ce3fa26774/FLAG0286c92d7 [2019-11-28 02:56:35,468 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6400f291/92f73283108b4c759291c7ce3fa26774 [2019-11-28 02:56:35,471 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 02:56:35,472 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 02:56:35,473 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 02:56:35,473 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 02:56:35,477 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 02:56:35,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:56:35" (1/1) ... [2019-11-28 02:56:35,481 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@524374c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:35, skipping insertion in model container [2019-11-28 02:56:35,481 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:56:35" (1/1) ... [2019-11-28 02:56:35,489 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 02:56:35,510 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 02:56:35,701 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 02:56:35,707 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 02:56:35,731 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 02:56:35,746 INFO L208 MainTranslator]: Completed translation [2019-11-28 02:56:35,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:35 WrapperNode [2019-11-28 02:56:35,748 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 02:56:35,749 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 02:56:35,750 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 02:56:35,750 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 02:56:35,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:35" (1/1) ... [2019-11-28 02:56:35,767 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:35" (1/1) ... [2019-11-28 02:56:35,787 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 02:56:35,787 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 02:56:35,787 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 02:56:35,787 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 02:56:35,886 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:35" (1/1) ... [2019-11-28 02:56:35,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:35" (1/1) ... [2019-11-28 02:56:35,887 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:35" (1/1) ... [2019-11-28 02:56:35,888 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:35" (1/1) ... [2019-11-28 02:56:35,894 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:35" (1/1) ... [2019-11-28 02:56:35,897 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:35" (1/1) ... [2019-11-28 02:56:35,898 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:35" (1/1) ... [2019-11-28 02:56:35,899 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 02:56:35,900 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 02:56:35,900 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 02:56:35,900 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 02:56:35,902 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:35" (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 02:56:35,967 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2019-11-28 02:56:35,968 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2019-11-28 02:56:35,968 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2019-11-28 02:56:35,970 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2019-11-28 02:56:35,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 02:56:35,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 02:56:36,136 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 02:56:36,137 INFO L297 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 02:56:36,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:56:36 BoogieIcfgContainer [2019-11-28 02:56:36,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 02:56:36,139 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-28 02:56:36,139 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-28 02:56:36,143 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-28 02:56:36,144 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 02:56:36,145 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 02:56:35" (1/3) ... [2019-11-28 02:56:36,146 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5086fcd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 02:56:36, skipping insertion in model container [2019-11-28 02:56:36,146 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 02:56:36,146 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:35" (2/3) ... [2019-11-28 02:56:36,147 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5086fcd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 02:56:36, skipping insertion in model container [2019-11-28 02:56:36,147 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 02:56:36,147 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:56:36" (3/3) ... [2019-11-28 02:56:36,149 INFO L371 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1d.c [2019-11-28 02:56:36,228 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-28 02:56:36,229 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-28 02:56:36,229 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-28 02:56:36,229 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 02:56:36,229 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 02:56:36,229 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-28 02:56:36,229 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 02:56:36,230 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-28 02:56:36,268 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2019-11-28 02:56:36,310 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-28 02:56:36,311 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 02:56:36,311 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 02:56:36,319 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-28 02:56:36,319 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 02:56:36,320 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-28 02:56:36,320 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2019-11-28 02:56:36,323 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-28 02:56:36,323 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 02:56:36,324 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 02:56:36,324 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-28 02:56:36,324 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 02:56:36,333 INFO L794 eck$LassoCheckResult]: Stem: 13#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 22#L25true call main_#t~ret6 := rec2(main_~x~0);< 3#rec2ENTRYtrue [2019-11-28 02:56:36,334 INFO L796 eck$LassoCheckResult]: Loop: 3#rec2ENTRYtrue ~j := #in~j; 20#L18true assume !(~j <= 0); 18#L20true call #t~ret3 := rec1(~j);< 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 - 1);< 3#rec2ENTRYtrue [2019-11-28 02:56:36,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:36,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1617, now seen corresponding path program 1 times [2019-11-28 02:56:36,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:36,352 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399727555] [2019-11-28 02:56:36,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:36,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:36,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:36,454 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:56:36,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:36,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1102838740, now seen corresponding path program 1 times [2019-11-28 02:56:36,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:36,457 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836354321] [2019-11-28 02:56:36,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:36,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:36,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:36,583 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 02:56:36,584 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836354321] [2019-11-28 02:56:36,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 02:56:36,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 02:56:36,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134851192] [2019-11-28 02:56:36,593 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-28 02:56:36,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 02:56:36,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 02:56:36,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 02:56:36,614 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2019-11-28 02:56:36,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 02:56:36,723 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2019-11-28 02:56:36,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 02:56:36,726 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 33 transitions. [2019-11-28 02:56:36,730 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-28 02:56:36,738 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 16 states and 22 transitions. [2019-11-28 02:56:36,739 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2019-11-28 02:56:36,739 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 16 [2019-11-28 02:56:36,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 22 transitions. [2019-11-28 02:56:36,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-28 02:56:36,742 INFO L688 BuchiCegarLoop]: Abstraction has 16 states and 22 transitions. [2019-11-28 02:56:36,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states and 22 transitions. [2019-11-28 02:56:36,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-28 02:56:36,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-28 02:56:36,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2019-11-28 02:56:36,776 INFO L711 BuchiCegarLoop]: Abstraction has 16 states and 22 transitions. [2019-11-28 02:56:36,776 INFO L591 BuchiCegarLoop]: Abstraction has 16 states and 22 transitions. [2019-11-28 02:56:36,776 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-28 02:56:36,776 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states and 22 transitions. [2019-11-28 02:56:36,778 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-28 02:56:36,778 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 02:56:36,778 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 02:56:36,779 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-28 02:56:36,780 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 02:56:36,780 INFO L794 eck$LassoCheckResult]: Stem: 77#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 64#L25 call main_#t~ret6 := rec2(main_~x~0);< 63#rec2ENTRY [2019-11-28 02:56:36,780 INFO L796 eck$LassoCheckResult]: Loop: 63#rec2ENTRY ~j := #in~j; 66#L18 assume !(~j <= 0); 71#L20 call #t~ret3 := rec1(~j);< 67#rec1ENTRY ~i := #in~i; 72#L12 assume !(~i <= 0); 68#L14 call #t~ret0 := rec1(~i - 2);< 67#rec1ENTRY ~i := #in~i; 72#L12 assume ~i <= 0;#res := 0; 73#rec1FINAL assume true; 74#rec1EXIT >#27#return; 69#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 67#rec1ENTRY ~i := #in~i; 72#L12 assume ~i <= 0;#res := 0; 73#rec1FINAL assume true; 74#rec1EXIT >#29#return; 70#L14-2 call #t~ret2 := rec1(#t~ret1);< 67#rec1ENTRY ~i := #in~i; 72#L12 assume ~i <= 0;#res := 0; 73#rec1FINAL assume true; 74#rec1EXIT >#31#return; 75#L14-3 #res := 1 + #t~ret2;havoc #t~ret2;havoc #t~ret0;havoc #t~ret1; 76#rec1FINAL assume true; 78#rec1EXIT >#33#return; 65#L20-1 call #t~ret4 := rec2(#t~ret3 - 1);< 63#rec2ENTRY [2019-11-28 02:56:36,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:36,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1617, now seen corresponding path program 2 times [2019-11-28 02:56:36,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:36,781 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444676444] [2019-11-28 02:56:36,781 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:36,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:36,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:36,790 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:56:36,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:36,791 INFO L82 PathProgramCache]: Analyzing trace with hash -616266826, now seen corresponding path program 1 times [2019-11-28 02:56:36,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:36,792 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594735551] [2019-11-28 02:56:36,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:36,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:36,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:36,834 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:56:36,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:36,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1277860358, now seen corresponding path program 1 times [2019-11-28 02:56:36,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:36,836 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509037695] [2019-11-28 02:56:36,836 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:36,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:36,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:36,882 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:56:37,295 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 02:56:37,296 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 02:56:37,296 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 02:56:37,296 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 02:56:37,296 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 02:56:37,296 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:37,297 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 02:56:37,297 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 02:56:37,297 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration2_Loop [2019-11-28 02:56:37,297 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 02:56:37,297 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 02:56:37,318 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 02:56:37,325 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 02:56:37,330 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 02:56:37,333 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 02:56:37,336 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 02:56:37,388 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 02:56:37,389 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 02:56:37,401 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:37,401 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 02:56:37,411 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:37,412 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) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:37,432 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:37,432 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 02:56:37,439 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:37,439 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 02:56:37,454 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:37,454 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 02:56:37,459 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:37,459 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) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:37,476 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:37,476 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 02:56:37,480 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:37,480 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 02:56:37,497 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:37,497 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 02:56:37,521 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 02:56:37,521 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 02:56:37,531 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 02:56:37,534 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 02:56:37,534 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 02:56:37,534 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 02:56:37,534 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 02:56:37,534 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 02:56:37,535 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:37,535 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 02:56:37,535 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 02:56:37,535 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration2_Loop [2019-11-28 02:56:37,535 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 02:56:37,535 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 02:56:37,537 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 02:56:37,543 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 02:56:37,549 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 02:56:37,555 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 02:56:37,568 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 02:56:37,600 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 02:56:37,605 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) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:37,612 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 02:56:37,615 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:37,615 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:37,616 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:37,616 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:37,616 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:37,619 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:37,619 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 02:56:37,622 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) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:37,640 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 02:56:37,642 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:37,642 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:37,643 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:37,643 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:37,643 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:37,644 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:37,644 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 02:56:37,646 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) [2019-11-28 02:56:37,656 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 02:56:37,657 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:37,658 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:37,658 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:37,658 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:37,658 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:37,659 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:37,659 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:37,662 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) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:37,671 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 02:56:37,673 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:37,673 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:37,674 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:37,674 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:37,674 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:37,675 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:37,675 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 02:56:37,678 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 02:56:37,683 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-28 02:56:37,683 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 02:56:37,691 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 02:56:37,691 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 02:56:37,691 INFO L510 LassoAnalysis]: Proved termination. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:37,692 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#in~j) = 1*rec2_#in~j Supporting invariants [] [2019-11-28 02:56:37,696 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 02:56:37,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:37,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:37,742 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 02:56:37,744 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:37,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:37,798 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-28 02:56:37,802 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:37,952 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-28 02:56:37,956 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 8 loop predicates [2019-11-28 02:56:37,957 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 16 states and 22 transitions. cyclomatic complexity: 8 Second operand 9 states. [2019-11-28 02:56:38,386 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 16 states and 22 transitions. cyclomatic complexity: 8. Second operand 9 states. Result 101 states and 147 transitions. Complement of second has 42 states. [2019-11-28 02:56:38,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 1 stem states 8 non-accepting loop states 1 accepting loop states [2019-11-28 02:56:38,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-28 02:56:38,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 36 transitions. [2019-11-28 02:56:38,391 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 2 letters. Loop has 24 letters. [2019-11-28 02:56:38,394 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:38,394 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 26 letters. Loop has 24 letters. [2019-11-28 02:56:38,395 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:38,395 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 2 letters. Loop has 48 letters. [2019-11-28 02:56:38,398 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:38,398 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 101 states and 147 transitions. [2019-11-28 02:56:38,413 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-28 02:56:38,426 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 101 states to 89 states and 135 transitions. [2019-11-28 02:56:38,427 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 38 [2019-11-28 02:56:38,428 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 41 [2019-11-28 02:56:38,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 89 states and 135 transitions. [2019-11-28 02:56:38,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 02:56:38,433 INFO L688 BuchiCegarLoop]: Abstraction has 89 states and 135 transitions. [2019-11-28 02:56:38,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states and 135 transitions. [2019-11-28 02:56:38,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 62. [2019-11-28 02:56:38,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-28 02:56:38,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 98 transitions. [2019-11-28 02:56:38,468 INFO L711 BuchiCegarLoop]: Abstraction has 62 states and 98 transitions. [2019-11-28 02:56:38,468 INFO L591 BuchiCegarLoop]: Abstraction has 62 states and 98 transitions. [2019-11-28 02:56:38,469 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-28 02:56:38,469 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 62 states and 98 transitions. [2019-11-28 02:56:38,474 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-28 02:56:38,474 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 02:56:38,475 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 02:56:38,476 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 02:56:38,477 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-28 02:56:38,477 INFO L794 eck$LassoCheckResult]: Stem: 375#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; 338#L25 call main_#t~ret6 := rec2(main_~x~0);< 337#rec2ENTRY ~j := #in~j; 340#L18 assume !(~j <= 0); 369#L20 call #t~ret3 := rec1(~j);< 382#rec1ENTRY ~i := #in~i; 368#L12 assume !(~i <= 0); 346#L14 call #t~ret0 := rec1(~i - 2);< 343#rec1ENTRY [2019-11-28 02:56:38,478 INFO L796 eck$LassoCheckResult]: Loop: 343#rec1ENTRY ~i := #in~i; 351#L12 assume !(~i <= 0); 344#L14 call #t~ret0 := rec1(~i - 2);< 343#rec1ENTRY [2019-11-28 02:56:38,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:38,478 INFO L82 PathProgramCache]: Analyzing trace with hash 874549579, now seen corresponding path program 1 times [2019-11-28 02:56:38,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:38,485 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470609762] [2019-11-28 02:56:38,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:38,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:38,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:38,511 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:56:38,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:38,515 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 1 times [2019-11-28 02:56:38,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:38,516 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255751506] [2019-11-28 02:56:38,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:38,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:38,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:38,531 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:56:38,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:38,535 INFO L82 PathProgramCache]: Analyzing trace with hash 434890603, now seen corresponding path program 2 times [2019-11-28 02:56:38,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:38,535 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910022424] [2019-11-28 02:56:38,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:38,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:38,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:38,566 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:56:38,598 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 02:56:38,598 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 02:56:38,598 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 02:56:38,598 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 02:56:38,598 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 02:56:38,598 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:38,598 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 02:56:38,599 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 02:56:38,599 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration3_Loop [2019-11-28 02:56:38,599 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 02:56:38,599 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 02:56:38,600 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 02:56:38,603 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 02:56:38,606 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 02:56:38,608 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 02:56:38,610 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 02:56:38,616 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 02:56:38,659 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 02:56:38,660 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 02:56:38,668 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:38,668 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 02:56:38,673 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:38,673 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 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:38,693 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:38,694 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 02:56:38,698 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:38,698 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 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:38,715 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:38,715 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 02:56:38,720 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:38,720 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 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:38,737 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:38,737 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 02:56:38,741 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:38,741 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 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:38,757 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:38,758 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 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 02:56:38,778 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 02:56:38,778 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 [2019-11-28 02:56:38,840 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 02:56:38,842 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 02:56:38,842 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 02:56:38,842 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 02:56:38,842 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 02:56:38,842 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 02:56:38,842 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:38,843 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 02:56:38,843 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 02:56:38,843 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration3_Loop [2019-11-28 02:56:38,843 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 02:56:38,843 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 02:56:38,844 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 02:56:38,853 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 02:56:38,855 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 02:56:38,858 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 02:56:38,870 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 02:56:38,872 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 02:56:38,913 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 02:56:38,914 INFO L489 LassoAnalysis]: Using template 'affine'. 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 02:56:38,926 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 02:56:38,928 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:38,928 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:38,929 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:38,929 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:38,929 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:38,930 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:38,930 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:38,932 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 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:38,946 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 02:56:38,948 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:38,948 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:38,948 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:38,948 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:38,948 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:38,949 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:38,950 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 02:56:38,952 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) [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Exception during sending of exit command (exit): Broken pipe [2019-11-28 02:56:38,994 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 02:56:38,996 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:38,996 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:38,996 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:38,997 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:38,997 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:38,998 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:38,998 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 02:56:39,000 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) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:39,011 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 02:56:39,013 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:39,013 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:39,013 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:39,013 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:39,013 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:39,015 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:39,015 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 02:56:39,019 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 02:56:39,024 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-28 02:56:39,024 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 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:39,037 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 02:56:39,037 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 02:56:39,038 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 02:56:39,038 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2019-11-28 02:56:39,041 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:39,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:39,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:39,081 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 02:56:39,083 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:39,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:39,093 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 02:56:39,093 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:39,111 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 02:56:39,112 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 02:56:39,112 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 62 states and 98 transitions. cyclomatic complexity: 40 Second operand 4 states. [2019-11-28 02:56:39,163 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 62 states and 98 transitions. cyclomatic complexity: 40. Second operand 4 states. Result 108 states and 165 transitions. Complement of second has 13 states. [2019-11-28 02:56:39,164 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 02:56:39,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-28 02:56:39,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 13 transitions. [2019-11-28 02:56:39,166 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 13 transitions. Stem has 8 letters. Loop has 3 letters. [2019-11-28 02:56:39,166 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:39,166 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 13 transitions. Stem has 11 letters. Loop has 3 letters. [2019-11-28 02:56:39,167 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:39,167 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 13 transitions. Stem has 8 letters. Loop has 6 letters. [2019-11-28 02:56:39,167 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:39,168 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 108 states and 165 transitions. [2019-11-28 02:56:39,171 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-28 02:56:39,182 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 108 states to 96 states and 153 transitions. [2019-11-28 02:56:39,182 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 40 [2019-11-28 02:56:39,184 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 42 [2019-11-28 02:56:39,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 153 transitions. [2019-11-28 02:56:39,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 02:56:39,187 INFO L688 BuchiCegarLoop]: Abstraction has 96 states and 153 transitions. [2019-11-28 02:56:39,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states and 153 transitions. [2019-11-28 02:56:39,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2019-11-28 02:56:39,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-28 02:56:39,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 143 transitions. [2019-11-28 02:56:39,211 INFO L711 BuchiCegarLoop]: Abstraction has 92 states and 143 transitions. [2019-11-28 02:56:39,211 INFO L591 BuchiCegarLoop]: Abstraction has 92 states and 143 transitions. [2019-11-28 02:56:39,211 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-28 02:56:39,211 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 92 states and 143 transitions. [2019-11-28 02:56:39,213 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-28 02:56:39,213 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 02:56:39,214 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 02:56:39,214 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 02:56:39,215 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-28 02:56:39,215 INFO L794 eck$LassoCheckResult]: Stem: 617#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; 618#L25 call main_#t~ret6 := rec2(main_~x~0);< 621#rec2ENTRY ~j := #in~j; 638#L18 assume !(~j <= 0); 592#L20 call #t~ret3 := rec1(~j);< 630#rec1ENTRY ~i := #in~i; 639#L12 assume !(~i <= 0); 580#L14 call #t~ret0 := rec1(~i - 2);< 579#rec1ENTRY ~i := #in~i; 582#L12 assume ~i <= 0;#res := 0; 641#rec1FINAL assume true; 626#rec1EXIT >#27#return; 591#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 594#rec1ENTRY [2019-11-28 02:56:39,215 INFO L796 eck$LassoCheckResult]: Loop: 594#rec1ENTRY ~i := #in~i; 634#L12 assume !(~i <= 0); 610#L14 call #t~ret0 := rec1(~i - 2);< 594#rec1ENTRY [2019-11-28 02:56:39,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:39,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1317996508, now seen corresponding path program 1 times [2019-11-28 02:56:39,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:39,216 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567638759] [2019-11-28 02:56:39,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:39,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:39,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:39,231 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:56:39,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:39,232 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 2 times [2019-11-28 02:56:39,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:39,232 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808566837] [2019-11-28 02:56:39,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:39,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:39,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:39,241 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:56:39,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:39,244 INFO L82 PathProgramCache]: Analyzing trace with hash -157050054, now seen corresponding path program 2 times [2019-11-28 02:56:39,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:39,244 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431095002] [2019-11-28 02:56:39,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:39,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:39,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:39,314 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 02:56:39,315 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431095002] [2019-11-28 02:56:39,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 02:56:39,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-28 02:56:39,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242021567] [2019-11-28 02:56:39,368 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 02:56:39,368 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 02:56:39,368 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 02:56:39,368 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 02:56:39,368 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 02:56:39,368 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:39,369 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 02:56:39,369 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 02:56:39,369 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration4_Loop [2019-11-28 02:56:39,369 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 02:56:39,369 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 02:56:39,370 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 02:56:39,373 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 02:56:39,377 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 02:56:39,381 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 02:56:39,396 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 02:56:39,400 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 02:56:39,448 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 02:56:39,448 INFO L404 LassoAnalysis]: Checking for nontermination... 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 02:56:39,454 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:39,455 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:39,458 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:39,458 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 25 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 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:39,463 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:39,463 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 02:56:39,465 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:39,465 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 26 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 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:39,471 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:39,471 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 02:56:39,474 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:39,474 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 27 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 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:39,479 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:39,480 INFO L160 nArgumentSynthesizer]: Using integer mode. 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 02:56:39,488 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 02:56:39,488 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 02:56:39,530 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 02:56:39,531 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 02:56:39,532 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 02:56:39,532 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 02:56:39,532 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 02:56:39,532 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 02:56:39,532 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:39,532 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 02:56:39,532 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 02:56:39,532 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration4_Loop [2019-11-28 02:56:39,532 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 02:56:39,532 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 02:56:39,533 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 02:56:39,536 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 02:56:39,538 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 02:56:39,544 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 02:56:39,547 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 02:56:39,549 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 02:56:39,592 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 02:56:39,592 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 02:56:39,599 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 02:56:39,601 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:39,601 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:39,601 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:39,601 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:39,601 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:39,604 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:39,604 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 02:56:39,606 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 02:56:39,613 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 02:56:39,615 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:39,615 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:39,615 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:39,615 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:39,615 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:39,616 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:39,616 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 02:56:39,618 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 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:39,625 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 02:56:39,627 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:39,627 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:39,627 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:39,627 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:39,627 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:39,629 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:39,629 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:39,632 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 02:56:39,634 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-28 02:56:39,634 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 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:39,640 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 02:56:39,640 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 02:56:39,640 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 02:56:39,640 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:39,643 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 02:56:39,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:39,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:39,690 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-28 02:56:39,691 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:39,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:39,721 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 02:56:39,721 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:39,741 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 02:56:39,741 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 02:56:39,741 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 143 transitions. cyclomatic complexity: 57 Second operand 5 states. [2019-11-28 02:56:39,848 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 143 transitions. cyclomatic complexity: 57. Second operand 5 states. Result 132 states and 207 transitions. Complement of second has 14 states. [2019-11-28 02:56:39,850 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 02:56:39,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 02:56:39,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 17 transitions. [2019-11-28 02:56:39,851 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 13 letters. Loop has 3 letters. [2019-11-28 02:56:39,851 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:39,851 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 16 letters. Loop has 3 letters. [2019-11-28 02:56:39,851 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:39,852 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 13 letters. Loop has 6 letters. [2019-11-28 02:56:39,852 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:39,852 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 132 states and 207 transitions. [2019-11-28 02:56:39,855 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-28 02:56:39,860 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 132 states to 120 states and 195 transitions. [2019-11-28 02:56:39,860 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 49 [2019-11-28 02:56:39,860 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 51 [2019-11-28 02:56:39,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 120 states and 195 transitions. [2019-11-28 02:56:39,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 02:56:39,861 INFO L688 BuchiCegarLoop]: Abstraction has 120 states and 195 transitions. [2019-11-28 02:56:39,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states and 195 transitions. [2019-11-28 02:56:39,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2019-11-28 02:56:39,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-11-28 02:56:39,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 185 transitions. [2019-11-28 02:56:39,887 INFO L711 BuchiCegarLoop]: Abstraction has 116 states and 185 transitions. [2019-11-28 02:56:39,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 02:56:39,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 02:56:39,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-28 02:56:39,888 INFO L87 Difference]: Start difference. First operand 116 states and 185 transitions. Second operand 6 states. [2019-11-28 02:56:39,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 02:56:39,932 INFO L93 Difference]: Finished difference Result 129 states and 195 transitions. [2019-11-28 02:56:39,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 02:56:39,933 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 129 states and 195 transitions. [2019-11-28 02:56:39,936 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2019-11-28 02:56:39,939 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 129 states to 127 states and 193 transitions. [2019-11-28 02:56:39,939 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 59 [2019-11-28 02:56:39,940 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 59 [2019-11-28 02:56:39,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 127 states and 193 transitions. [2019-11-28 02:56:39,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 02:56:39,940 INFO L688 BuchiCegarLoop]: Abstraction has 127 states and 193 transitions. [2019-11-28 02:56:39,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states and 193 transitions. [2019-11-28 02:56:39,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 104. [2019-11-28 02:56:39,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-28 02:56:39,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 157 transitions. [2019-11-28 02:56:39,953 INFO L711 BuchiCegarLoop]: Abstraction has 104 states and 157 transitions. [2019-11-28 02:56:39,954 INFO L591 BuchiCegarLoop]: Abstraction has 104 states and 157 transitions. [2019-11-28 02:56:39,954 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-11-28 02:56:39,954 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 104 states and 157 transitions. [2019-11-28 02:56:39,955 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-28 02:56:39,955 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 02:56:39,956 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 02:56:39,957 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 02:56:39,957 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-28 02:56:39,957 INFO L794 eck$LassoCheckResult]: Stem: 1186#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; 1187#L25 call main_#t~ret6 := rec2(main_~x~0);< 1194#rec2ENTRY ~j := #in~j; 1208#L18 assume !(~j <= 0); 1200#L20 call #t~ret3 := rec1(~j);< 1207#rec1ENTRY ~i := #in~i; 1206#L12 assume !(~i <= 0); 1154#L14 call #t~ret0 := rec1(~i - 2);< 1205#rec1ENTRY ~i := #in~i; 1203#L12 assume !(~i <= 0); 1165#L14 call #t~ret0 := rec1(~i - 2);< 1202#rec1ENTRY ~i := #in~i; 1204#L12 assume ~i <= 0;#res := 0; 1229#rec1FINAL assume true; 1184#rec1EXIT >#27#return; 1147#L14-1 [2019-11-28 02:56:39,957 INFO L796 eck$LassoCheckResult]: Loop: 1147#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1145#rec1ENTRY ~i := #in~i; 1148#L12 assume ~i <= 0;#res := 0; 1221#rec1FINAL assume true; 1215#rec1EXIT >#29#return; 1160#L14-2 call #t~ret2 := rec1(#t~ret1);< 1182#rec1ENTRY ~i := #in~i; 1218#L12 assume !(~i <= 0); 1162#L14 call #t~ret0 := rec1(~i - 2);< 1182#rec1ENTRY ~i := #in~i; 1218#L12 assume ~i <= 0;#res := 0; 1217#rec1FINAL assume true; 1216#rec1EXIT >#27#return; 1147#L14-1 [2019-11-28 02:56:39,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:39,958 INFO L82 PathProgramCache]: Analyzing trace with hash -377207200, now seen corresponding path program 1 times [2019-11-28 02:56:39,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:39,958 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873593335] [2019-11-28 02:56:39,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:39,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:39,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:39,970 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:56:39,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:39,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1306212703, now seen corresponding path program 1 times [2019-11-28 02:56:39,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:39,972 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950779872] [2019-11-28 02:56:39,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:39,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:40,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:40,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:40,023 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 02:56:40,024 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950779872] [2019-11-28 02:56:40,024 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774089932] [2019-11-28 02:56:40,024 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 02:56:40,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:40,051 INFO L255 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-28 02:56:40,052 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:40,056 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 02:56:40,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-28 02:56:40,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2019-11-28 02:56:40,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570605464] [2019-11-28 02:56:40,057 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-28 02:56:40,057 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 6 interpolants. [2019-11-28 02:56:40,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-28 02:56:40,058 INFO L87 Difference]: Start difference. First operand 104 states and 157 transitions. cyclomatic complexity: 59 Second operand 6 states. [2019-11-28 02:56:40,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 02:56:40,111 INFO L93 Difference]: Finished difference Result 119 states and 173 transitions. [2019-11-28 02:56:40,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 02:56:40,114 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 119 states and 173 transitions. [2019-11-28 02:56:40,120 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-28 02:56:40,125 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 119 states to 114 states and 164 transitions. [2019-11-28 02:56:40,125 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 50 [2019-11-28 02:56:40,125 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 50 [2019-11-28 02:56:40,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 114 states and 164 transitions. [2019-11-28 02:56:40,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 02:56:40,126 INFO L688 BuchiCegarLoop]: Abstraction has 114 states and 164 transitions. [2019-11-28 02:56:40,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states and 164 transitions. [2019-11-28 02:56:40,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2019-11-28 02:56:40,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-11-28 02:56:40,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 161 transitions. [2019-11-28 02:56:40,143 INFO L711 BuchiCegarLoop]: Abstraction has 111 states and 161 transitions. [2019-11-28 02:56:40,143 INFO L591 BuchiCegarLoop]: Abstraction has 111 states and 161 transitions. [2019-11-28 02:56:40,143 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-11-28 02:56:40,143 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 111 states and 161 transitions. [2019-11-28 02:56:40,145 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-28 02:56:40,145 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 02:56:40,145 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 02:56:40,146 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 02:56:40,146 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-28 02:56:40,147 INFO L794 eck$LassoCheckResult]: Stem: 1471#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 1472#L25 call main_#t~ret6 := rec2(main_~x~0);< 1479#rec2ENTRY ~j := #in~j; 1501#L18 assume !(~j <= 0); 1481#L20 call #t~ret3 := rec1(~j);< 1494#rec1ENTRY ~i := #in~i; 1491#L12 assume !(~i <= 0); 1440#L14 call #t~ret0 := rec1(~i - 2);< 1488#rec1ENTRY ~i := #in~i; 1486#L12 assume !(~i <= 0); 1437#L14 call #t~ret0 := rec1(~i - 2);< 1485#rec1ENTRY ~i := #in~i; 1487#L12 assume ~i <= 0;#res := 0; 1505#rec1FINAL assume true; 1496#rec1EXIT >#27#return; 1448#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1449#rec1ENTRY ~i := #in~i; 1508#L12 assume ~i <= 0;#res := 0; 1507#rec1FINAL assume true; 1506#rec1EXIT >#29#return; 1428#L14-2 call #t~ret2 := rec1(#t~ret1);< 1427#rec1ENTRY ~i := #in~i; 1429#L12 assume ~i <= 0;#res := 0; 1465#rec1FINAL assume true; 1467#rec1EXIT >#31#return; 1454#L14-3 #res := 1 + #t~ret2;havoc #t~ret2;havoc #t~ret0;havoc #t~ret1; 1434#rec1FINAL assume true; 1444#rec1EXIT >#27#return; 1441#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1474#rec1ENTRY [2019-11-28 02:56:40,147 INFO L796 eck$LassoCheckResult]: Loop: 1474#rec1ENTRY ~i := #in~i; 1504#L12 assume !(~i <= 0); 1438#L14 call #t~ret0 := rec1(~i - 2);< 1474#rec1ENTRY [2019-11-28 02:56:40,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:40,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1733863270, now seen corresponding path program 1 times [2019-11-28 02:56:40,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:40,148 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219608271] [2019-11-28 02:56:40,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:40,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:40,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:40,168 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:56:40,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:40,169 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 3 times [2019-11-28 02:56:40,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:40,169 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71914655] [2019-11-28 02:56:40,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:40,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:40,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:40,177 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:56:40,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:40,178 INFO L82 PathProgramCache]: Analyzing trace with hash -2050992272, now seen corresponding path program 2 times [2019-11-28 02:56:40,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:40,178 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222018602] [2019-11-28 02:56:40,178 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:40,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:40,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:40,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:40,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:40,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:40,259 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-28 02:56:40,260 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222018602] [2019-11-28 02:56:40,260 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619626566] [2019-11-28 02:56:40,260 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 02:56:40,290 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 02:56:40,290 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 02:56:40,291 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 02:56:40,292 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:40,299 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-28 02:56:40,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 02:56:40,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2019-11-28 02:56:40,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751648139] [2019-11-28 02:56:40,330 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 02:56:40,330 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 02:56:40,330 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 02:56:40,330 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 02:56:40,330 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 02:56:40,330 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:40,330 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 02:56:40,330 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 02:56:40,331 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration6_Loop [2019-11-28 02:56:40,331 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 02:56:40,331 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 02:56:40,332 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 02:56:40,335 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 02:56:40,336 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 02:56:40,338 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 02:56:40,344 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 02:56:40,346 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 02:56:40,382 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 02:56:40,382 INFO L404 LassoAnalysis]: Checking for nontermination... 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 02:56:40,393 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:40,393 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 02:56:40,396 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:40,397 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 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:40,403 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:40,403 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:40,406 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:40,406 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 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 02:56:40,412 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:40,412 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 02:56:40,415 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:40,415 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 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 02:56:40,423 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:40,423 INFO L160 nArgumentSynthesizer]: Using integer mode. 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 02:56:40,433 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 02:56:40,433 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 02:56:40,439 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 02:56:40,441 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 02:56:40,441 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 02:56:40,441 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 02:56:40,441 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 02:56:40,441 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 02:56:40,441 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:40,441 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 02:56:40,441 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 02:56:40,441 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration6_Loop [2019-11-28 02:56:40,441 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 02:56:40,442 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 02:56:40,442 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 02:56:40,451 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 02:56:40,453 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 02:56:40,457 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 02:56:40,459 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 02:56:40,460 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 02:56:40,488 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 02:56:40,488 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 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 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:40,496 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 02:56:40,497 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:40,497 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:40,497 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:40,497 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:40,497 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:40,498 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:40,498 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 02:56:40,500 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 41 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 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:40,507 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 02:56:40,510 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:40,510 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:40,510 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:40,510 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:40,510 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:40,511 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:40,511 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 02:56:40,513 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 42 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 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:40,519 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 02:56:40,520 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:40,520 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:40,520 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:40,520 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:40,520 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:40,522 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:40,522 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 02:56:40,524 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 02:56:40,525 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-28 02:56:40,525 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 43 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 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:40,530 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 02:56:40,530 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 02:56:40,530 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 02:56:40,531 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2019-11-28 02:56:40,532 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 02:56:40,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:40,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:40,596 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-28 02:56:40,599 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:40,621 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:40,627 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:40,631 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:40,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:40,640 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 02:56:40,641 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:40,662 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 02:56:40,662 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 02:56:40,663 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 111 states and 161 transitions. cyclomatic complexity: 56 Second operand 5 states. [2019-11-28 02:56:40,725 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 111 states and 161 transitions. cyclomatic complexity: 56. Second operand 5 states. Result 128 states and 179 transitions. Complement of second has 7 states. [2019-11-28 02:56:40,727 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 02:56:40,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 02:56:40,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2019-11-28 02:56:40,728 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 29 letters. Loop has 3 letters. [2019-11-28 02:56:40,728 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:40,728 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 02:56:40,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:40,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:40,783 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-28 02:56:40,798 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:40,820 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:40,824 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:40,827 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:40,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:40,837 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 02:56:40,838 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:40,857 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 02:56:40,858 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 02:56:40,858 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 111 states and 161 transitions. cyclomatic complexity: 56 Second operand 5 states. [2019-11-28 02:56:40,913 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 111 states and 161 transitions. cyclomatic complexity: 56. Second operand 5 states. Result 128 states and 179 transitions. Complement of second has 7 states. [2019-11-28 02:56:40,915 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 02:56:40,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 02:56:40,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2019-11-28 02:56:40,916 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 29 letters. Loop has 3 letters. [2019-11-28 02:56:40,916 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:40,916 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 02:56:40,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:40,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:40,973 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-28 02:56:40,976 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:40,995 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:40,999 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:41,002 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:41,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:41,012 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 02:56:41,013 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:41,033 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 02:56:41,034 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 02:56:41,034 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 111 states and 161 transitions. cyclomatic complexity: 56 Second operand 5 states. [2019-11-28 02:56:41,147 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 111 states and 161 transitions. cyclomatic complexity: 56. Second operand 5 states. Result 156 states and 218 transitions. Complement of second has 13 states. [2019-11-28 02:56:41,149 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 02:56:41,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 02:56:41,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 24 transitions. [2019-11-28 02:56:41,150 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 29 letters. Loop has 3 letters. [2019-11-28 02:56:41,150 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:41,150 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 32 letters. Loop has 3 letters. [2019-11-28 02:56:41,151 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:41,151 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 29 letters. Loop has 6 letters. [2019-11-28 02:56:41,151 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:41,152 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 156 states and 218 transitions. [2019-11-28 02:56:41,154 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2019-11-28 02:56:41,157 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 156 states to 138 states and 200 transitions. [2019-11-28 02:56:41,157 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 54 [2019-11-28 02:56:41,158 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 57 [2019-11-28 02:56:41,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 138 states and 200 transitions. [2019-11-28 02:56:41,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 02:56:41,158 INFO L688 BuchiCegarLoop]: Abstraction has 138 states and 200 transitions. [2019-11-28 02:56:41,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states and 200 transitions. [2019-11-28 02:56:41,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 119. [2019-11-28 02:56:41,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-11-28 02:56:41,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 169 transitions. [2019-11-28 02:56:41,169 INFO L711 BuchiCegarLoop]: Abstraction has 119 states and 169 transitions. [2019-11-28 02:56:41,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 02:56:41,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 02:56:41,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-28 02:56:41,170 INFO L87 Difference]: Start difference. First operand 119 states and 169 transitions. Second operand 8 states. [2019-11-28 02:56:41,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 02:56:41,226 INFO L93 Difference]: Finished difference Result 97 states and 115 transitions. [2019-11-28 02:56:41,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-28 02:56:41,227 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 97 states and 115 transitions. [2019-11-28 02:56:41,228 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-28 02:56:41,229 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 97 states to 62 states and 74 transitions. [2019-11-28 02:56:41,230 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2019-11-28 02:56:41,230 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2019-11-28 02:56:41,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 74 transitions. [2019-11-28 02:56:41,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 02:56:41,230 INFO L688 BuchiCegarLoop]: Abstraction has 62 states and 74 transitions. [2019-11-28 02:56:41,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states and 74 transitions. [2019-11-28 02:56:41,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2019-11-28 02:56:41,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-28 02:56:41,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2019-11-28 02:56:41,235 INFO L711 BuchiCegarLoop]: Abstraction has 53 states and 64 transitions. [2019-11-28 02:56:41,235 INFO L591 BuchiCegarLoop]: Abstraction has 53 states and 64 transitions. [2019-11-28 02:56:41,235 INFO L424 BuchiCegarLoop]: ======== Iteration 7============ [2019-11-28 02:56:41,235 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 53 states and 64 transitions. [2019-11-28 02:56:41,236 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-28 02:56:41,236 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 02:56:41,236 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 02:56:41,237 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 02:56:41,237 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-28 02:56:41,237 INFO L794 eck$LassoCheckResult]: Stem: 2675#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 2650#L25 call main_#t~ret6 := rec2(main_~x~0);< 2649#rec2ENTRY ~j := #in~j; 2651#L18 assume !(~j <= 0); 2679#L20 call #t~ret3 := rec1(~j);< 2690#rec1ENTRY ~i := #in~i; 2691#L12 assume !(~i <= 0); 2669#L14 call #t~ret0 := rec1(~i - 2);< 2688#rec1ENTRY ~i := #in~i; 2698#L12 assume ~i <= 0;#res := 0; 2701#rec1FINAL assume true; 2687#rec1EXIT >#27#return; 2661#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 2660#rec1ENTRY ~i := #in~i; 2663#L12 assume ~i <= 0;#res := 0; 2664#rec1FINAL assume true; 2665#rec1EXIT >#29#return; 2684#L14-2 call #t~ret2 := rec1(#t~ret1);< 2673#rec1ENTRY ~i := #in~i; 2686#L12 assume ~i <= 0;#res := 0; 2685#rec1FINAL assume true; 2683#rec1EXIT >#31#return; 2682#L14-3 #res := 1 + #t~ret2;havoc #t~ret2;havoc #t~ret0;havoc #t~ret1; 2681#rec1FINAL assume true; 2680#rec1EXIT >#33#return; 2653#L20-1 call #t~ret4 := rec2(#t~ret3 - 1);< 2652#rec2ENTRY ~j := #in~j; 2655#L18 assume !(~j <= 0); 2659#L20 call #t~ret3 := rec1(~j);< 2656#rec1ENTRY [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Exception during sending of exit command (exit): Broken pipe [2019-11-28 02:56:41,264 INFO L796 eck$LassoCheckResult]: Loop: 2656#rec1ENTRY ~i := #in~i; 2658#L12 assume !(~i <= 0); 2657#L14 call #t~ret0 := rec1(~i - 2);< 2656#rec1ENTRY [2019-11-28 02:56:41,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:41,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1852176490, now seen corresponding path program 2 times [2019-11-28 02:56:41,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:41,266 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937848022] [2019-11-28 02:56:41,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:41,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:41,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:41,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:41,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:41,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:41,375 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-28 02:56:41,376 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937848022] [2019-11-28 02:56:41,376 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920566021] [2019-11-28 02:56:41,376 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 02:56:41,402 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 02:56:41,402 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 02:56:41,403 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 02:56:41,405 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:41,410 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-28 02:56:41,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 02:56:41,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2019-11-28 02:56:41,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857949008] [2019-11-28 02:56:41,411 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 02:56:41,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:41,412 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 4 times [2019-11-28 02:56:41,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:41,412 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230188580] [2019-11-28 02:56:41,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:41,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:41,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:41,417 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:56:41,438 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 02:56:41,438 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 02:56:41,438 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 02:56:41,438 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 02:56:41,438 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 02:56:41,438 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:41,438 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 02:56:41,438 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 02:56:41,439 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration7_Loop [2019-11-28 02:56:41,439 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 02:56:41,439 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 02:56:41,440 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 02:56:41,442 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 02:56:41,444 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 02:56:41,449 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 02:56:41,450 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 02:56:41,456 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 02:56:41,487 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 02:56:41,487 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 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 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:41,493 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:41,493 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 02:56:41,495 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:41,496 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 46 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 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:41,503 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:41,503 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 02:56:41,506 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:41,506 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 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 02:56:41,514 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:41,514 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 02:56:41,516 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:41,517 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 48 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 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:41,523 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:41,523 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 02:56:41,527 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:41,527 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 49 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 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:41,532 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:41,532 INFO L160 nArgumentSynthesizer]: Using integer mode. 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) Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:41,541 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 02:56:41,541 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 02:56:41,548 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 02:56:41,549 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 02:56:41,549 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 02:56:41,549 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 02:56:41,549 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 02:56:41,549 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 02:56:41,550 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:41,550 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 02:56:41,550 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 02:56:41,550 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration7_Loop [2019-11-28 02:56:41,550 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 02:56:41,550 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 02:56:41,551 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 02:56:41,552 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 02:56:41,558 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 02:56:41,559 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 02:56:41,561 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 02:56:41,567 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 02:56:41,602 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 02:56:41,602 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:41,613 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 02:56:41,615 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:41,615 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:41,616 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:41,616 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:41,616 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:41,617 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:41,617 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:41,619 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 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:41,625 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 Waiting until toolchain timeout for monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:41,627 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:41,627 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:41,627 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:41,627 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:41,627 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:41,628 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:41,628 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 02:56:41,629 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 53 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 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:41,636 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 02:56:41,638 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:41,638 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:41,638 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:41,639 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:41,639 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:41,639 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:41,639 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 02:56:41,640 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 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 02:56:41,648 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 02:56:41,650 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:41,650 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:41,650 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:41,650 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:41,650 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:41,651 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:41,651 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 02:56:41,652 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 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 02:56:41,658 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 02:56:41,659 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:41,659 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:41,659 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:41,660 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:41,660 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:41,660 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:41,661 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 02:56:41,663 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 02:56:41,665 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-28 02:56:41,665 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 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 02:56:41,670 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 02:56:41,670 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 02:56:41,670 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 02:56:41,670 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 (55)] Exception during sending of exit command (exit): Broken pipe [2019-11-28 02:56:41,672 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 02:56:41,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:41,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:41,723 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-28 02:56:41,724 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:41,746 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:41,749 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:41,751 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:41,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:41,760 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 02:56:41,760 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:41,777 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 02:56:41,777 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 02:56:41,777 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 53 states and 64 transitions. cyclomatic complexity: 15 Second operand 5 states. [2019-11-28 02:56:41,856 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 53 states and 64 transitions. cyclomatic complexity: 15. Second operand 5 states. Result 63 states and 75 transitions. Complement of second has 13 states. [2019-11-28 02:56:41,858 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 02:56:41,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 02:56:41,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 10 transitions. [2019-11-28 02:56:41,858 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 10 transitions. Stem has 29 letters. Loop has 3 letters. [2019-11-28 02:56:41,859 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:41,859 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 02:56:41,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:41,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:41,905 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-28 02:56:41,906 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:41,923 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:41,926 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:41,928 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:41,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:41,940 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 02:56:41,940 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:41,953 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 02:56:41,954 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 02:56:41,954 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 53 states and 64 transitions. cyclomatic complexity: 15 Second operand 5 states. [2019-11-28 02:56:42,025 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 53 states and 64 transitions. cyclomatic complexity: 15. Second operand 5 states. Result 63 states and 75 transitions. Complement of second has 13 states. [2019-11-28 02:56:42,027 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 02:56:42,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 02:56:42,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 10 transitions. [2019-11-28 02:56:42,028 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 10 transitions. Stem has 29 letters. Loop has 3 letters. [2019-11-28 02:56:42,028 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:42,028 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 02:56:42,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:42,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:42,082 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-28 02:56:42,083 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:42,109 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:42,114 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:42,117 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:42,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:42,137 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 02:56:42,138 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:42,155 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 02:56:42,156 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 02:56:42,157 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 53 states and 64 transitions. cyclomatic complexity: 15 Second operand 5 states. [2019-11-28 02:56:42,252 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 53 states and 64 transitions. cyclomatic complexity: 15. Second operand 5 states. Result 77 states and 89 transitions. Complement of second has 13 states. [2019-11-28 02:56:42,252 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 02:56:42,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 02:56:42,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 24 transitions. [2019-11-28 02:56:42,253 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 29 letters. Loop has 3 letters. [2019-11-28 02:56:42,254 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:42,254 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 32 letters. Loop has 3 letters. [2019-11-28 02:56:42,254 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:42,254 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 29 letters. Loop has 6 letters. [2019-11-28 02:56:42,254 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:42,255 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 77 states and 89 transitions. [2019-11-28 02:56:42,256 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 02:56:42,256 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 77 states to 0 states and 0 transitions. [2019-11-28 02:56:42,256 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-28 02:56:42,256 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-28 02:56:42,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-28 02:56:42,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-28 02:56:42,256 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 02:56:42,256 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 02:56:42,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 02:56:42,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 02:56:42,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-28 02:56:42,257 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 8 states. [2019-11-28 02:56:42,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 02:56:42,257 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2019-11-28 02:56:42,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-28 02:56:42,258 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2019-11-28 02:56:42,258 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 02:56:42,258 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2019-11-28 02:56:42,258 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-28 02:56:42,258 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-28 02:56:42,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-28 02:56:42,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-28 02:56:42,258 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 02:56:42,258 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 02:56:42,259 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 02:56:42,259 INFO L424 BuchiCegarLoop]: ======== Iteration 8============ [2019-11-28 02:56:42,259 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-11-28 02:56:42,259 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 02:56:42,259 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-11-28 02:56:42,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 02:56:42 BoogieIcfgContainer [2019-11-28 02:56:42,266 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-28 02:56:42,267 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 02:56:42,267 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 02:56:42,267 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 02:56:42,267 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:56:36" (3/4) ... [2019-11-28 02:56:42,271 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-28 02:56:42,271 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 02:56:42,274 INFO L168 Benchmark]: Toolchain (without parser) took 6800.80 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 273.7 MB). Free memory was 957.7 MB in the beginning and 1.1 GB in the end (delta: -117.3 MB). Peak memory consumption was 156.4 MB. Max. memory is 11.5 GB. [2019-11-28 02:56:42,274 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 02:56:42,275 INFO L168 Benchmark]: CACSL2BoogieTranslator took 275.56 ms. Allocated memory is still 1.0 GB. Free memory was 957.7 MB in the beginning and 946.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 02:56:42,275 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.63 ms. Allocated memory is still 1.0 GB. Free memory is still 946.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 02:56:42,276 INFO L168 Benchmark]: Boogie Preprocessor took 112.39 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -190.9 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-28 02:56:42,277 INFO L168 Benchmark]: RCFGBuilder took 238.76 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: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 11.5 GB. [2019-11-28 02:56:42,277 INFO L168 Benchmark]: BuchiAutomizer took 6127.04 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 132.1 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 43.2 MB). Peak memory consumption was 175.3 MB. Max. memory is 11.5 GB. [2019-11-28 02:56:42,278 INFO L168 Benchmark]: Witness Printer took 4.78 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24 B). Peak memory consumption was 24 B. Max. memory is 11.5 GB. [2019-11-28 02:56:42,281 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 275.56 ms. Allocated memory is still 1.0 GB. Free memory was 957.7 MB in the beginning and 946.9 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 37.63 ms. Allocated memory is still 1.0 GB. Free memory is still 946.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 112.39 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -190.9 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 238.76 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: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 6127.04 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 132.1 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 43.2 MB). Peak memory consumption was 175.3 MB. Max. memory is 11.5 GB. * Witness Printer took 4.78 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24 B). Peak memory consumption was 24 B. 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 10 terminating modules (5 trivial, 3 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(j) and consists of 10 locations. One deterministic module has affine ranking function \old(i) and consists of 4 locations. One deterministic module has affine ranking function \old(i) and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 5 locations. 5 modules have a trivial ranking function, the largest among these consists of 8 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 6.0s and 8 iterations. TraceHistogramMax:5. Analysis of lassos took 3.1s. Construction of modules took 0.4s. Büchi inclusion checks took 2.0s. Highest rank in rank-based complementation 3. Minimization of det autom 3. Minimization of nondet autom 7. Automata minimization 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 89 StatesRemovedByMinimization, 7 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 111 states and ocurred in iteration 5. Nontrivial modules had stage [3, 0, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 22/24 HoareTripleCheckerStatistics: 188 SDtfs, 186 SDslu, 297 SDs, 0 SdLazy, 307 SolverSat, 134 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time LassoAnalysisResults: nont0 unkn0 SFLI2 SFLT2 conc0 concLT2 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital11 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq151 hnf93 smp100 dnf100 smp100 tf112 neg100 sie111 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 15ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 18 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.4s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...