./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 54858612 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash cb528549fa76ae8087cf7043645dfa20323a0116 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-5485861 [2020-10-26 04:13:48,964 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 04:13:48,968 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 04:13:49,018 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 04:13:49,019 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 04:13:49,020 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 04:13:49,022 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 04:13:49,024 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 04:13:49,027 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 04:13:49,028 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 04:13:49,030 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 04:13:49,031 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 04:13:49,032 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 04:13:49,033 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 04:13:49,035 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 04:13:49,036 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 04:13:49,037 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 04:13:49,039 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 04:13:49,041 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 04:13:49,044 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 04:13:49,046 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 04:13:49,048 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 04:13:49,049 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 04:13:49,051 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 04:13:49,054 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 04:13:49,055 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 04:13:49,055 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 04:13:49,057 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 04:13:49,057 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 04:13:49,059 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 04:13:49,059 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 04:13:49,061 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 04:13:49,062 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 04:13:49,063 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 04:13:49,064 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 04:13:49,065 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 04:13:49,071 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 04:13:49,071 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 04:13:49,072 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 04:13:49,073 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 04:13:49,074 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 04:13:49,076 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-10-26 04:13:49,105 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 04:13:49,106 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 04:13:49,107 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 04:13:49,108 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 04:13:49,108 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 04:13:49,108 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-26 04:13:49,109 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-26 04:13:49,109 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-26 04:13:49,109 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-26 04:13:49,109 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-26 04:13:49,110 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-26 04:13:49,110 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 04:13:49,110 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-26 04:13:49,110 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 04:13:49,111 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 04:13:49,111 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-26 04:13:49,111 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-26 04:13:49,111 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-26 04:13:49,112 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 04:13:49,112 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-26 04:13:49,112 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 04:13:49,112 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-26 04:13:49,113 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 04:13:49,113 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 04:13:49,113 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-26 04:13:49,114 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 04:13:49,114 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 04:13:49,114 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 04:13:49,114 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-26 04:13:49,116 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-26 04:13:49,116 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb528549fa76ae8087cf7043645dfa20323a0116 [2020-10-26 04:13:49,520 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 04:13:49,574 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 04:13:49,577 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 04:13:49,579 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 04:13:49,579 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 04:13:49,580 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c [2020-10-26 04:13:49,662 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45201c497/588c7b1d237b4a2b985db72ec9a1da95/FLAGe0e0b55d2 [2020-10-26 04:13:50,342 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 04:13:50,343 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c [2020-10-26 04:13:50,353 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45201c497/588c7b1d237b4a2b985db72ec9a1da95/FLAGe0e0b55d2 [2020-10-26 04:13:50,698 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45201c497/588c7b1d237b4a2b985db72ec9a1da95 [2020-10-26 04:13:50,702 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 04:13:50,709 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-26 04:13:50,711 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 04:13:50,711 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 04:13:50,715 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 04:13:50,716 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 04:13:50" (1/1) ... [2020-10-26 04:13:50,720 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42b18dc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:13:50, skipping insertion in model container [2020-10-26 04:13:50,721 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 04:13:50" (1/1) ... [2020-10-26 04:13:50,729 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 04:13:50,743 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 04:13:50,922 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 04:13:50,927 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 04:13:50,944 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 04:13:50,960 INFO L208 MainTranslator]: Completed translation [2020-10-26 04:13:50,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:13:50 WrapperNode [2020-10-26 04:13:50,961 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 04:13:50,963 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-26 04:13:50,963 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-26 04:13:50,963 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-26 04:13:50,974 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:13:50" (1/1) ... [2020-10-26 04:13:50,980 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:13:50" (1/1) ... [2020-10-26 04:13:51,003 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-26 04:13:51,004 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 04:13:51,004 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 04:13:51,005 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 04:13:51,015 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:13:50" (1/1) ... [2020-10-26 04:13:51,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:13:50" (1/1) ... [2020-10-26 04:13:51,017 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:13:50" (1/1) ... [2020-10-26 04:13:51,017 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:13:50" (1/1) ... [2020-10-26 04:13:51,020 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:13:50" (1/1) ... [2020-10-26 04:13:51,022 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:13:50" (1/1) ... [2020-10-26 04:13:51,024 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:13:50" (1/1) ... [2020-10-26 04:13:51,025 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 04:13:51,027 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 04:13:51,027 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 04:13:51,027 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 04:13:51,028 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:13:50" (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 [2020-10-26 04:13:51,126 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2020-10-26 04:13:51,126 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2020-10-26 04:13:51,127 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2020-10-26 04:13:51,127 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2020-10-26 04:13:51,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 04:13:51,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 04:13:51,342 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 04:13:51,342 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-26 04:13:51,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 04:13:51 BoogieIcfgContainer [2020-10-26 04:13:51,345 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 04:13:51,347 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-26 04:13:51,347 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-26 04:13:51,352 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-26 04:13:51,354 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-26 04:13:51,354 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 26.10 04:13:50" (1/3) ... [2020-10-26 04:13:51,356 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@43b3a378 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 26.10 04:13:51, skipping insertion in model container [2020-10-26 04:13:51,356 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-26 04:13:51,356 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:13:50" (2/3) ... [2020-10-26 04:13:51,357 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@43b3a378 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 26.10 04:13:51, skipping insertion in model container [2020-10-26 04:13:51,357 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-26 04:13:51,357 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 04:13:51" (3/3) ... [2020-10-26 04:13:51,360 INFO L373 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1b.c [2020-10-26 04:13:51,441 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-26 04:13:51,442 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-26 04:13:51,442 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-26 04:13:51,443 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 04:13:51,443 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 04:13:51,443 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-26 04:13:51,443 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 04:13:51,444 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-26 04:13:51,474 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2020-10-26 04:13:51,524 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2020-10-26 04:13:51,525 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 04:13:51,525 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 04:13:51,541 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-10-26 04:13:51,541 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 04:13:51,542 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-26 04:13:51,542 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2020-10-26 04:13:51,545 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2020-10-26 04:13:51,546 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 04:13:51,546 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 04:13:51,547 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-10-26 04:13:51,547 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 04:13:51,557 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 [2020-10-26 04:13:51,558 INFO L796 eck$LassoCheckResult]: Loop: 3#rec2ENTRYtrue ~j := #in~j; 20#L18true assume !(~j <= 0); 18#L20true call #t~ret3 := rec1(~j - 1);< 4#rec1ENTRYtrue ~i := #in~i; 9#L12true assume ~i <= 0;#res := 0; 5#rec1FINALtrue assume true; 12#rec1EXITtrue >#33#return; 23#L20-1true call #t~ret4 := rec2(#t~ret3);< 3#rec2ENTRYtrue [2020-10-26 04:13:51,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:13:51,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1617, now seen corresponding path program 1 times [2020-10-26 04:13:51,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:13:51,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151799877] [2020-10-26 04:13:51,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:13:51,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:13:51,676 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:13:51,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:13:51,682 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:13:51,703 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:13:51,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:13:51,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1102838740, now seen corresponding path program 1 times [2020-10-26 04:13:51,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:13:51,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141410112] [2020-10-26 04:13:51,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:13:51,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:13:51,725 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:13:51,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:13:51,733 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:13:51,736 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:13:51,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:13:51,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1371489668, now seen corresponding path program 1 times [2020-10-26 04:13:51,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:13:51,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148839135] [2020-10-26 04:13:51,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:13:51,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:13:51,750 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:13:51,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:13:51,758 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:13:51,761 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:13:52,073 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 04:13:52,074 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 04:13:52,074 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 04:13:52,074 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 04:13:52,075 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-26 04:13:52,075 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:13:52,075 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 04:13:52,075 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 04:13:52,075 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration1_Loop [2020-10-26 04:13:52,076 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 04:13:52,076 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 04:13:52,100 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:13:52,118 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:13:52,126 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:13:52,135 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:13:52,143 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:13:52,306 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 04:13:52,307 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) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:13:52,316 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 04:13:52,316 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-26 04:13:52,324 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 04:13:52,325 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 [2020-10-26 04:13:52,359 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 04:13:52,359 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-26 04:13:52,366 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 04:13:52,366 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) [2020-10-26 04:13:52,408 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 04:13:52,408 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 [2020-10-26 04:13:52,412 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 04:13:52,413 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) [2020-10-26 04:13:52,454 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 04:13:52,454 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:13:52,458 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 04:13:52,459 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) [2020-10-26 04:13:52,498 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 04:13:52,498 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) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:13:52,536 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-26 04:13:52,536 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-26 04:13:52,543 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-26 04:13:52,568 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 04:13:52,568 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 04:13:52,568 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 04:13:52,568 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 04:13:52,569 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-26 04:13:52,569 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:13:52,569 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 04:13:52,569 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 04:13:52,569 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration1_Loop [2020-10-26 04:13:52,569 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 04:13:52,569 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 04:13:52,571 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:13:52,578 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:13:52,581 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:13:52,585 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:13:52,595 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:13:52,646 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 04:13:52,652 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 [2020-10-26 04:13:52,662 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 [2020-10-26 04:13:52,665 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:13:52,665 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 04:13:52,666 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:13:52,666 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:13:52,666 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:13:52,669 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 04:13:52,669 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 04:13:52,673 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 [2020-10-26 04:13:52,698 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 [2020-10-26 04:13:52,701 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:13:52,701 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 04:13:52,701 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:13:52,701 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:13:52,702 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:13:52,703 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 04:13:52,703 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 04:13:52,713 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:13:52,740 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 [2020-10-26 04:13:52,743 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:13:52,743 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 04:13:52,743 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:13:52,743 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:13:52,743 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:13:52,744 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 04:13:52,744 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 04:13:52,747 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 [2020-10-26 04:13:52,772 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 [2020-10-26 04:13:52,774 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:13:52,774 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 04:13:52,774 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:13:52,774 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:13:52,774 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:13:52,776 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 04:13:52,776 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 04:13:52,780 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-26 04:13:52,786 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-26 04:13:52,786 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 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 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:13:52,793 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-26 04:13:52,794 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-26 04:13:52,794 INFO L510 LassoAnalysis]: Proved termination. [2020-10-26 04:13:52,795 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#in~j) = 1*rec2_#in~j Supporting invariants [] [2020-10-26 04:13:52,824 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-26 04:13:52,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:13:52,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:13:52,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-26 04:13:52,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:13:52,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:13:52,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-26 04:13:52,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:13:53,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 04:13:53,232 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 6 loop predicates [2020-10-26 04:13:53,233 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 21 states. Second operand 7 states. [2020-10-26 04:13:53,792 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 21 states.. Second operand 7 states. Result 194 states and 279 transitions. Complement of second has 61 states. [2020-10-26 04:13:53,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 1 stem states 9 non-accepting loop states 1 accepting loop states [2020-10-26 04:13:53,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-26 04:13:53,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 57 transitions. [2020-10-26 04:13:53,799 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 57 transitions. Stem has 2 letters. Loop has 8 letters. [2020-10-26 04:13:53,802 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:13:53,803 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 57 transitions. Stem has 10 letters. Loop has 8 letters. [2020-10-26 04:13:53,803 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:13:53,803 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 57 transitions. Stem has 2 letters. Loop has 16 letters. [2020-10-26 04:13:53,804 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:13:53,805 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 194 states and 279 transitions. [2020-10-26 04:13:53,821 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2020-10-26 04:13:53,833 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 194 states to 82 states and 120 transitions. [2020-10-26 04:13:53,834 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 35 [2020-10-26 04:13:53,835 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 38 [2020-10-26 04:13:53,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 82 states and 120 transitions. [2020-10-26 04:13:53,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 04:13:53,837 INFO L691 BuchiCegarLoop]: Abstraction has 82 states and 120 transitions. [2020-10-26 04:13:53,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states and 120 transitions. [2020-10-26 04:13:53,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2020-10-26 04:13:53,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-26 04:13:53,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 83 transitions. [2020-10-26 04:13:53,887 INFO L714 BuchiCegarLoop]: Abstraction has 55 states and 83 transitions. [2020-10-26 04:13:53,887 INFO L594 BuchiCegarLoop]: Abstraction has 55 states and 83 transitions. [2020-10-26 04:13:53,887 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-26 04:13:53,887 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 55 states and 83 transitions. [2020-10-26 04:13:53,890 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2020-10-26 04:13:53,890 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 04:13:53,890 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 04:13:53,890 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 04:13:53,891 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-26 04:13:53,891 INFO L794 eck$LassoCheckResult]: Stem: 378#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 345#L25 call main_#t~ret6 := rec2(main_~x~0);< 344#rec2ENTRY ~j := #in~j; 347#L18 assume !(~j <= 0); 363#L20 call #t~ret3 := rec1(~j - 1);< 379#rec1ENTRY ~i := #in~i; 397#L12 assume !(~i <= 0); 351#L14 call #t~ret0 := rec1(~i - 2);< 350#rec1ENTRY [2020-10-26 04:13:53,891 INFO L796 eck$LassoCheckResult]: Loop: 350#rec1ENTRY ~i := #in~i; 358#L12 assume !(~i <= 0); 354#L14 call #t~ret0 := rec1(~i - 2);< 350#rec1ENTRY [2020-10-26 04:13:53,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:13:53,892 INFO L82 PathProgramCache]: Analyzing trace with hash 874549579, now seen corresponding path program 1 times [2020-10-26 04:13:53,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:13:53,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091648518] [2020-10-26 04:13:53,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:13:53,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:13:53,905 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:13:53,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:13:53,911 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:13:53,914 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:13:53,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:13:53,915 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 1 times [2020-10-26 04:13:53,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:13:53,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187638177] [2020-10-26 04:13:53,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:13:53,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:13:53,920 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:13:53,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:13:53,923 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:13:53,924 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:13:53,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:13:53,925 INFO L82 PathProgramCache]: Analyzing trace with hash 434890603, now seen corresponding path program 2 times [2020-10-26 04:13:53,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:13:53,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910792102] [2020-10-26 04:13:53,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:13:53,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:13:53,935 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:13:53,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:13:53,943 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:13:53,946 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:13:53,984 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 04:13:53,984 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 04:13:53,984 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 04:13:53,984 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 04:13:53,984 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-26 04:13:53,984 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:13:53,985 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 04:13:53,985 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 04:13:53,985 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration2_Loop [2020-10-26 04:13:53,985 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 04:13:53,985 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 04:13:53,987 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:13:53,990 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:13:53,993 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:13:53,996 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:13:54,009 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:13:54,013 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:13:54,065 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 04:13:54,066 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) [2020-10-26 04:13:54,072 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 04:13:54,072 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 [2020-10-26 04:13:54,077 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 04:13:54,078 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:13:54,116 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 04:13:54,116 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 [2020-10-26 04:13:54,120 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 04:13:54,121 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:13:54,162 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 04:13:54,162 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:13:54,166 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 04:13:54,166 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 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:13:54,204 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 04:13:54,204 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 [2020-10-26 04:13:54,207 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 04:13:54,208 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret1=0} Honda state: {rec1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:13:54,246 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 04:13:54,246 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 [2020-10-26 04:13:54,250 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 04:13:54,250 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:13:54,290 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 04:13:54,290 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:13:54,331 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-26 04:13:54,331 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-26 04:13:54,372 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-26 04:13:54,375 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 04:13:54,375 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 04:13:54,376 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 04:13:54,376 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 04:13:54,376 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-26 04:13:54,376 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:13:54,376 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 04:13:54,376 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 04:13:54,376 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration2_Loop [2020-10-26 04:13:54,376 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 04:13:54,377 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 04:13:54,381 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:13:54,397 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:13:54,400 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:13:54,403 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:13:54,407 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:13:54,415 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:13:54,474 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 04:13:54,476 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:13:54,489 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 [2020-10-26 04:13:54,491 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:13:54,492 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 04:13:54,492 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:13:54,492 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:13:54,492 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:13:54,495 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 04:13:54,495 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 [2020-10-26 04:13:54,505 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) [2020-10-26 04:13:54,551 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 [2020-10-26 04:13:54,556 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:13:54,556 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 04:13:54,556 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:13:54,556 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:13:54,557 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:13:54,560 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 04:13:54,560 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:13:54,567 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 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:13:54,608 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 [2020-10-26 04:13:54,610 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:13:54,610 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 04:13:54,610 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:13:54,611 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:13:54,611 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:13:54,612 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 04:13:54,613 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 04:13:54,615 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. Waiting until toolchain timeout for monitored process 22 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 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:13:54,655 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 [2020-10-26 04:13:54,658 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:13:54,658 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 04:13:54,658 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:13:54,658 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:13:54,658 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:13:54,659 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 04:13:54,659 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 04:13:54,671 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. Waiting until toolchain timeout for monitored process 23 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 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:13:54,710 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 [2020-10-26 04:13:54,714 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:13:54,714 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 04:13:54,715 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:13:54,715 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:13:54,715 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:13:54,718 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 04:13:54,718 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 04:13:54,724 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:13:54,732 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-26 04:13:54,732 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:13:54,743 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-26 04:13:54,743 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-26 04:13:54,743 INFO L510 LassoAnalysis]: Proved termination. [2020-10-26 04:13:54,743 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2020-10-26 04:13:54,786 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-26 04:13:54,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:13:54,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:13:54,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-26 04:13:54,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:13:54,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:13:54,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-26 04:13:54,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:13:54,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 04:13:54,878 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 [2020-10-26 04:13:54,878 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 55 states and 83 transitions. cyclomatic complexity: 32 Second operand 4 states. [2020-10-26 04:13:54,940 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 55 states and 83 transitions. cyclomatic complexity: 32. Second operand 4 states. Result 105 states and 149 transitions. Complement of second has 13 states. [2020-10-26 04:13:54,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-26 04:13:54,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-26 04:13:54,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 17 transitions. [2020-10-26 04:13:54,943 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 8 letters. Loop has 3 letters. [2020-10-26 04:13:54,943 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:13:54,943 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 11 letters. Loop has 3 letters. [2020-10-26 04:13:54,943 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:13:54,944 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 8 letters. Loop has 6 letters. [2020-10-26 04:13:54,944 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:13:54,944 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 105 states and 149 transitions. [2020-10-26 04:13:54,948 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2020-10-26 04:13:54,953 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 105 states to 93 states and 137 transitions. [2020-10-26 04:13:54,953 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 37 [2020-10-26 04:13:54,953 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 39 [2020-10-26 04:13:54,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 137 transitions. [2020-10-26 04:13:54,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 04:13:54,955 INFO L691 BuchiCegarLoop]: Abstraction has 93 states and 137 transitions. [2020-10-26 04:13:54,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states and 137 transitions. [2020-10-26 04:13:54,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2020-10-26 04:13:54,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-26 04:13:54,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 129 transitions. [2020-10-26 04:13:54,968 INFO L714 BuchiCegarLoop]: Abstraction has 89 states and 129 transitions. [2020-10-26 04:13:54,968 INFO L594 BuchiCegarLoop]: Abstraction has 89 states and 129 transitions. [2020-10-26 04:13:54,968 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-26 04:13:54,968 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 89 states and 129 transitions. [2020-10-26 04:13:54,971 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2020-10-26 04:13:54,971 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 04:13:54,971 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 04:13:54,974 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 04:13:54,974 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-26 04:13:54,974 INFO L794 eck$LassoCheckResult]: Stem: 613#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 614#L25 call main_#t~ret6 := rec2(main_~x~0);< 620#rec2ENTRY ~j := #in~j; 633#L18 assume !(~j <= 0); 615#L20 call #t~ret3 := rec1(~j - 1);< 642#rec1ENTRY ~i := #in~i; 637#L12 assume !(~i <= 0); 577#L14 call #t~ret0 := rec1(~i - 2);< 576#rec1ENTRY ~i := #in~i; 579#L12 assume ~i <= 0;#res := 0; 583#rec1FINAL assume true; 584#rec1EXIT >#27#return; 593#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 595#rec1ENTRY [2020-10-26 04:13:54,974 INFO L796 eck$LassoCheckResult]: Loop: 595#rec1ENTRY ~i := #in~i; 632#L12 assume !(~i <= 0); 589#L14 call #t~ret0 := rec1(~i - 2);< 595#rec1ENTRY [2020-10-26 04:13:54,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:13:54,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1317996508, now seen corresponding path program 1 times [2020-10-26 04:13:54,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:13:54,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620433299] [2020-10-26 04:13:54,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:13:54,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:13:54,999 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:13:55,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:13:55,014 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:13:55,018 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:13:55,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:13:55,021 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 2 times [2020-10-26 04:13:55,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:13:55,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482000777] [2020-10-26 04:13:55,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:13:55,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:13:55,030 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:13:55,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:13:55,037 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:13:55,041 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:13:55,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:13:55,042 INFO L82 PathProgramCache]: Analyzing trace with hash -157050054, now seen corresponding path program 2 times [2020-10-26 04:13:55,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:13:55,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059245760] [2020-10-26 04:13:55,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:13:55,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:13:55,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 04:13:55,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:13:55,191 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 04:13:55,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059245760] [2020-10-26 04:13:55,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 04:13:55,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 04:13:55,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696451169] [2020-10-26 04:13:55,229 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 04:13:55,229 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 04:13:55,230 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 04:13:55,230 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 04:13:55,230 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-26 04:13:55,230 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:13:55,230 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 04:13:55,230 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 04:13:55,230 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration3_Loop [2020-10-26 04:13:55,230 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 04:13:55,231 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 04:13:55,233 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:13:55,238 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:13:55,245 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:13:55,248 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:13:55,252 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:13:55,255 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:13:55,295 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 04:13:55,296 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:13:55,300 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 04:13:55,300 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:13:55,304 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 04:13:55,305 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:13:55,345 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 04:13:55,345 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:13:55,384 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-26 04:13:55,385 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 [2020-10-26 04:13:55,425 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-26 04:13:55,427 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 04:13:55,427 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 04:13:55,427 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 04:13:55,427 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 04:13:55,427 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-26 04:13:55,427 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:13:55,428 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 04:13:55,428 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 04:13:55,428 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration3_Loop [2020-10-26 04:13:55,428 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 04:13:55,428 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 04:13:55,430 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:13:55,433 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:13:55,440 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:13:55,442 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:13:55,446 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:13:55,449 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:13:55,482 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 04:13:55,482 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) [2020-10-26 04:13:55,506 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 [2020-10-26 04:13:55,508 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:13:55,508 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 04:13:55,509 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:13:55,509 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:13:55,509 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:13:55,511 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 04:13:55,511 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 [2020-10-26 04:13:55,516 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:13:55,551 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 [2020-10-26 04:13:55,556 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:13:55,557 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 04:13:55,557 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:13:55,557 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:13:55,557 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:13:55,560 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 04:13:55,561 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 04:13:55,566 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-26 04:13:55,580 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-26 04:13:55,580 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:13:55,591 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-26 04:13:55,592 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-26 04:13:55,592 INFO L510 LassoAnalysis]: Proved termination. [2020-10-26 04:13:55,592 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 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:13:55,625 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-26 04:13:55,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:13:55,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:13:55,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-26 04:13:55,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:13:55,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:13:55,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-26 04:13:55,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:13:55,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 04:13:55,771 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 [2020-10-26 04:13:55,772 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 89 states and 129 transitions. cyclomatic complexity: 47 Second operand 5 states. [2020-10-26 04:13:55,931 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 89 states and 129 transitions. cyclomatic complexity: 47. Second operand 5 states. Result 134 states and 193 transitions. Complement of second has 14 states. [2020-10-26 04:13:55,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-26 04:13:55,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-26 04:13:55,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 19 transitions. [2020-10-26 04:13:55,934 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 13 letters. Loop has 3 letters. [2020-10-26 04:13:55,934 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:13:55,934 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 16 letters. Loop has 3 letters. [2020-10-26 04:13:55,935 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:13:55,935 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 13 letters. Loop has 6 letters. [2020-10-26 04:13:55,935 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:13:55,936 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 134 states and 193 transitions. [2020-10-26 04:13:55,940 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2020-10-26 04:13:55,944 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 134 states to 122 states and 181 transitions. [2020-10-26 04:13:55,945 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 48 [2020-10-26 04:13:55,946 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 50 [2020-10-26 04:13:55,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 181 transitions. [2020-10-26 04:13:55,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 04:13:55,946 INFO L691 BuchiCegarLoop]: Abstraction has 122 states and 181 transitions. [2020-10-26 04:13:55,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states and 181 transitions. [2020-10-26 04:13:55,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 113. [2020-10-26 04:13:55,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-26 04:13:55,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 165 transitions. [2020-10-26 04:13:55,961 INFO L714 BuchiCegarLoop]: Abstraction has 113 states and 165 transitions. [2020-10-26 04:13:55,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 04:13:55,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 04:13:55,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-26 04:13:55,967 INFO L87 Difference]: Start difference. First operand 113 states and 165 transitions. Second operand 6 states. [2020-10-26 04:13:56,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 04:13:56,026 INFO L93 Difference]: Finished difference Result 123 states and 175 transitions. [2020-10-26 04:13:56,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 04:13:56,027 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 123 states and 175 transitions. [2020-10-26 04:13:56,031 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2020-10-26 04:13:56,034 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 123 states to 121 states and 173 transitions. [2020-10-26 04:13:56,035 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 55 [2020-10-26 04:13:56,035 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 55 [2020-10-26 04:13:56,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 121 states and 173 transitions. [2020-10-26 04:13:56,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 04:13:56,036 INFO L691 BuchiCegarLoop]: Abstraction has 121 states and 173 transitions. [2020-10-26 04:13:56,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states and 173 transitions. [2020-10-26 04:13:56,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 101. [2020-10-26 04:13:56,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-26 04:13:56,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 143 transitions. [2020-10-26 04:13:56,049 INFO L714 BuchiCegarLoop]: Abstraction has 101 states and 143 transitions. [2020-10-26 04:13:56,049 INFO L594 BuchiCegarLoop]: Abstraction has 101 states and 143 transitions. [2020-10-26 04:13:56,049 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-10-26 04:13:56,049 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 101 states and 143 transitions. [2020-10-26 04:13:56,051 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2020-10-26 04:13:56,051 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 04:13:56,052 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 04:13:56,053 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 04:13:56,053 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2020-10-26 04:13:56,053 INFO L794 eck$LassoCheckResult]: Stem: 1167#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 1168#L25 call main_#t~ret6 := rec2(main_~x~0);< 1174#rec2ENTRY ~j := #in~j; 1185#L18 assume !(~j <= 0); 1146#L20 call #t~ret3 := rec1(~j - 1);< 1184#rec1ENTRY ~i := #in~i; 1183#L12 assume !(~i <= 0); 1156#L14 call #t~ret0 := rec1(~i - 2);< 1181#rec1ENTRY ~i := #in~i; 1179#L12 assume !(~i <= 0); 1161#L14 call #t~ret0 := rec1(~i - 2);< 1178#rec1ENTRY ~i := #in~i; 1180#L12 assume ~i <= 0;#res := 0; 1222#rec1FINAL assume true; 1166#rec1EXIT >#27#return; 1133#L14-1 [2020-10-26 04:13:56,053 INFO L796 eck$LassoCheckResult]: Loop: 1133#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1132#rec1ENTRY ~i := #in~i; 1135#L12 assume ~i <= 0;#res := 0; 1140#rec1FINAL assume true; 1141#rec1EXIT >#29#return; 1154#L14-2 call #t~ret2 := rec1(#t~ret1);< 1163#rec1ENTRY ~i := #in~i; 1204#L12 assume !(~i <= 0); 1157#L14 call #t~ret0 := rec1(~i - 2);< 1163#rec1ENTRY ~i := #in~i; 1204#L12 assume ~i <= 0;#res := 0; 1205#rec1FINAL assume true; 1213#rec1EXIT >#27#return; 1133#L14-1 [2020-10-26 04:13:56,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:13:56,054 INFO L82 PathProgramCache]: Analyzing trace with hash -377207200, now seen corresponding path program 1 times [2020-10-26 04:13:56,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:13:56,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933095552] [2020-10-26 04:13:56,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:13:56,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:13:56,063 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:13:56,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:13:56,075 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:13:56,080 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:13:56,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:13:56,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1306212703, now seen corresponding path program 1 times [2020-10-26 04:13:56,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:13:56,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518529559] [2020-10-26 04:13:56,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:13:56,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:13:56,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 04:13:56,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:13:56,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 04:13:56,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:13:56,169 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 04:13:56,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518529559] [2020-10-26 04:13:56,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722248826] [2020-10-26 04:13:56,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-10-26 04:13:56,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:13:56,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-26 04:13:56,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 04:13:56,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 04:13:56,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-26 04:13:56,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2020-10-26 04:13:56,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103880523] [2020-10-26 04:13:56,249 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-26 04:13:56,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 04:13:56,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 04:13:56,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-26 04:13:56,251 INFO L87 Difference]: Start difference. First operand 101 states and 143 transitions. cyclomatic complexity: 49 Second operand 6 states. [2020-10-26 04:13:56,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 04:13:56,337 INFO L93 Difference]: Finished difference Result 117 states and 161 transitions. [2020-10-26 04:13:56,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 04:13:56,338 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 117 states and 161 transitions. [2020-10-26 04:13:56,341 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2020-10-26 04:13:56,350 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 117 states to 117 states and 161 transitions. [2020-10-26 04:13:56,350 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 53 [2020-10-26 04:13:56,351 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 53 [2020-10-26 04:13:56,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 117 states and 161 transitions. [2020-10-26 04:13:56,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 04:13:56,353 INFO L691 BuchiCegarLoop]: Abstraction has 117 states and 161 transitions. [2020-10-26 04:13:56,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states and 161 transitions. [2020-10-26 04:13:56,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 113. [2020-10-26 04:13:56,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-26 04:13:56,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 157 transitions. [2020-10-26 04:13:56,375 INFO L714 BuchiCegarLoop]: Abstraction has 113 states and 157 transitions. [2020-10-26 04:13:56,375 INFO L594 BuchiCegarLoop]: Abstraction has 113 states and 157 transitions. [2020-10-26 04:13:56,375 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-10-26 04:13:56,375 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 113 states and 157 transitions. [2020-10-26 04:13:56,377 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2020-10-26 04:13:56,377 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 04:13:56,377 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 04:13:56,379 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 04:13:56,379 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 04:13:56,380 INFO L794 eck$LassoCheckResult]: Stem: 1445#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 1446#L25 call main_#t~ret6 := rec2(main_~x~0);< 1458#rec2ENTRY ~j := #in~j; 1471#L18 assume !(~j <= 0); 1422#L20 call #t~ret3 := rec1(~j - 1);< 1470#rec1ENTRY ~i := #in~i; 1469#L12 assume !(~i <= 0); 1418#L14 call #t~ret0 := rec1(~i - 2);< 1467#rec1ENTRY ~i := #in~i; 1440#L12 assume ~i <= 0;#res := 0; 1417#rec1FINAL assume true; 1419#rec1EXIT >#27#return; 1410#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1409#rec1ENTRY ~i := #in~i; 1412#L12 assume ~i <= 0;#res := 0; 1515#rec1FINAL assume true; 1509#rec1EXIT >#29#return; 1441#L14-2 call #t~ret2 := rec1(#t~ret1);< 1442#rec1ENTRY ~i := #in~i; 1510#L12 assume ~i <= 0;#res := 0; 1508#rec1FINAL assume true; 1505#rec1EXIT >#31#return; 1434#L14-3 #res := 1 + #t~ret2;havoc #t~ret2;havoc #t~ret1;havoc #t~ret0; 1435#rec1FINAL assume true; 1464#rec1EXIT >#33#return; 1404#L20-1 [2020-10-26 04:13:56,380 INFO L796 eck$LassoCheckResult]: Loop: 1404#L20-1 call #t~ret4 := rec2(#t~ret3);< 1403#rec2ENTRY ~j := #in~j; 1405#L18 assume !(~j <= 0); 1452#L20 call #t~ret3 := rec1(~j - 1);< 1454#rec1ENTRY ~i := #in~i; 1512#L12 assume !(~i <= 0); 1447#L14 call #t~ret0 := rec1(~i - 2);< 1454#rec1ENTRY ~i := #in~i; 1512#L12 assume ~i <= 0;#res := 0; 1511#rec1FINAL assume true; 1507#rec1EXIT >#27#return; 1411#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1409#rec1ENTRY ~i := #in~i; 1412#L12 assume ~i <= 0;#res := 0; 1515#rec1FINAL assume true; 1509#rec1EXIT >#29#return; 1506#L14-2 call #t~ret2 := rec1(#t~ret1);< 1442#rec1ENTRY ~i := #in~i; 1510#L12 assume ~i <= 0;#res := 0; 1508#rec1FINAL assume true; 1505#rec1EXIT >#31#return; 1463#L14-3 #res := 1 + #t~ret2;havoc #t~ret2;havoc #t~ret1;havoc #t~ret0; 1475#rec1FINAL assume true; 1461#rec1EXIT >#33#return; 1404#L20-1 [2020-10-26 04:13:56,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:13:56,381 INFO L82 PathProgramCache]: Analyzing trace with hash -790062692, now seen corresponding path program 1 times [2020-10-26 04:13:56,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:13:56,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293226817] [2020-10-26 04:13:56,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:13:56,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:13:56,391 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:13:56,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:13:56,400 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:13:56,403 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:13:56,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:13:56,404 INFO L82 PathProgramCache]: Analyzing trace with hash 125202860, now seen corresponding path program 1 times [2020-10-26 04:13:56,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:13:56,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171308368] [2020-10-26 04:13:56,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:13:56,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:13:56,413 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:13:56,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:13:56,421 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:13:56,425 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:13:56,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:13:56,426 INFO L82 PathProgramCache]: Analyzing trace with hash -2019382713, now seen corresponding path program 1 times [2020-10-26 04:13:56,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:13:56,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195295095] [2020-10-26 04:13:56,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:13:56,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:13:56,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-26 04:13:56,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:13:56,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-26 04:13:56,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:13:56,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 04:13:56,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:13:56,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-26 04:13:56,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:13:56,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-26 04:13:56,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:13:56,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-26 04:13:56,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:13:56,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 04:13:56,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:13:56,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-26 04:13:56,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:13:56,634 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-10-26 04:13:56,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195295095] [2020-10-26 04:13:56,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517932791] [2020-10-26 04:13:56,635 INFO L95 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 [2020-10-26 04:13:56,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:13:56,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-26 04:13:56,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:13:56,749 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-10-26 04:13:56,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 04:13:56,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-26 04:13:56,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033369422] [2020-10-26 04:13:57,097 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 04:13:57,098 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 04:13:57,098 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 04:13:57,098 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 04:13:57,098 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-26 04:13:57,098 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:13:57,098 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 04:13:57,098 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 04:13:57,098 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration5_Loop [2020-10-26 04:13:57,098 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 04:13:57,098 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 04:13:57,099 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:13:57,113 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:13:57,117 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:13:57,173 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 04:13:57,173 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:13:57,178 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 04:13:57,178 INFO L160 nArgumentSynthesizer]: Using integer mode. 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) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:13:57,213 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-26 04:13:57,214 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-26 04:13:58,883 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-26 04:13:58,886 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 04:13:58,886 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 04:13:58,886 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 04:13:58,886 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 04:13:58,886 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-26 04:13:58,886 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:13:58,886 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 04:13:58,886 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 04:13:58,886 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration5_Loop [2020-10-26 04:13:58,887 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 04:13:58,887 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 04:13:58,888 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:13:58,892 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:13:58,894 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:13:58,968 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 04:13:58,969 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:13:58,972 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 [2020-10-26 04:13:58,974 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:13:58,974 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 04:13:58,974 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:13:58,974 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:13:58,974 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:13:58,975 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 04:13:58,975 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 04:13:58,984 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:13:59,026 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 [2020-10-26 04:13:59,028 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:13:59,028 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 04:13:59,028 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:13:59,028 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:13:59,028 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:13:59,029 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 04:13:59,030 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:13:59,036 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:13:59,067 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 [2020-10-26 04:13:59,069 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:13:59,069 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 04:13:59,069 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:13:59,069 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:13:59,069 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:13:59,071 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 04:13:59,072 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 04:13:59,075 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-26 04:13:59,082 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-26 04:13:59,082 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:13:59,086 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-26 04:13:59,086 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-26 04:13:59,086 INFO L510 LassoAnalysis]: Proved termination. [2020-10-26 04:13:59,086 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#t~ret3) = 1*rec2_#t~ret3 Supporting invariants [] [2020-10-26 04:13:59,108 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-26 04:13:59,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:13:59,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:13:59,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-26 04:13:59,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:13:59,269 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 04:13:59,276 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 04:13:59,281 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 04:13:59,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:13:59,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-26 04:13:59,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:13:59,505 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-26 04:13:59,506 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2020-10-26 04:13:59,506 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 157 transitions. cyclomatic complexity: 51 Second operand 11 states. [2020-10-26 04:14:00,184 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 157 transitions. cyclomatic complexity: 51. Second operand 11 states. Result 584 states and 903 transitions. Complement of second has 45 states. [2020-10-26 04:14:00,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2020-10-26 04:14:00,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-26 04:14:00,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 52 transitions. [2020-10-26 04:14:00,186 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 25 letters. Loop has 24 letters. [2020-10-26 04:14:00,187 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:14:00,187 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 49 letters. Loop has 24 letters. [2020-10-26 04:14:00,191 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:14:00,191 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 25 letters. Loop has 48 letters. [2020-10-26 04:14:00,192 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:14:00,192 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 584 states and 903 transitions. [2020-10-26 04:14:00,211 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2020-10-26 04:14:00,227 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 584 states to 432 states and 649 transitions. [2020-10-26 04:14:00,227 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 140 [2020-10-26 04:14:00,231 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 141 [2020-10-26 04:14:00,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 432 states and 649 transitions. [2020-10-26 04:14:00,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 04:14:00,231 INFO L691 BuchiCegarLoop]: Abstraction has 432 states and 649 transitions. [2020-10-26 04:14:00,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states and 649 transitions. [2020-10-26 04:14:00,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 383. [2020-10-26 04:14:00,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2020-10-26 04:14:00,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 534 transitions. [2020-10-26 04:14:00,294 INFO L714 BuchiCegarLoop]: Abstraction has 383 states and 534 transitions. [2020-10-26 04:14:00,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 04:14:00,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 04:14:00,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-26 04:14:00,296 INFO L87 Difference]: Start difference. First operand 383 states and 534 transitions. Second operand 11 states. [2020-10-26 04:14:00,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 04:14:00,580 INFO L93 Difference]: Finished difference Result 442 states and 645 transitions. [2020-10-26 04:14:00,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 04:14:00,581 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 442 states and 645 transitions. [2020-10-26 04:14:00,590 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2020-10-26 04:14:00,597 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 442 states to 349 states and 495 transitions. [2020-10-26 04:14:00,598 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 131 [2020-10-26 04:14:00,598 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 135 [2020-10-26 04:14:00,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 349 states and 495 transitions. [2020-10-26 04:14:00,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 04:14:00,601 INFO L691 BuchiCegarLoop]: Abstraction has 349 states and 495 transitions. [2020-10-26 04:14:00,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states and 495 transitions. [2020-10-26 04:14:00,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 314. [2020-10-26 04:14:00,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2020-10-26 04:14:00,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 415 transitions. [2020-10-26 04:14:00,618 INFO L714 BuchiCegarLoop]: Abstraction has 314 states and 415 transitions. [2020-10-26 04:14:00,618 INFO L594 BuchiCegarLoop]: Abstraction has 314 states and 415 transitions. [2020-10-26 04:14:00,618 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-10-26 04:14:00,618 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 314 states and 415 transitions. [2020-10-26 04:14:00,621 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2020-10-26 04:14:00,622 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 04:14:00,622 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 04:14:00,623 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 04:14:00,623 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-26 04:14:00,624 INFO L794 eck$LassoCheckResult]: Stem: 3449#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 3450#L25 call main_#t~ret6 := rec2(main_~x~0);< 3467#rec2ENTRY ~j := #in~j; 3489#L18 assume !(~j <= 0); 3469#L20 call #t~ret3 := rec1(~j - 1);< 3487#rec1ENTRY ~i := #in~i; 3503#L12 assume !(~i <= 0); 3497#L14 call #t~ret0 := rec1(~i - 2);< 3502#rec1ENTRY ~i := #in~i; 3507#L12 assume ~i <= 0;#res := 0; 3561#rec1FINAL assume true; 3558#rec1EXIT >#27#return; 3553#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 3554#rec1ENTRY ~i := #in~i; 3557#L12 assume ~i <= 0;#res := 0; 3556#rec1FINAL assume true; 3552#rec1EXIT >#29#return; 3547#L14-2 call #t~ret2 := rec1(#t~ret1);< 3550#rec1ENTRY ~i := #in~i; 3555#L12 assume ~i <= 0;#res := 0; 3551#rec1FINAL assume true; 3549#rec1EXIT >#31#return; 3545#L14-3 #res := 1 + #t~ret2;havoc #t~ret2;havoc #t~ret1;havoc #t~ret0; 3582#rec1FINAL assume true; 3468#rec1EXIT >#33#return; 3388#L20-1 call #t~ret4 := rec2(#t~ret3);< 3387#rec2ENTRY ~j := #in~j; 3389#L18 assume !(~j <= 0); 3534#L20 call #t~ret3 := rec1(~j - 1);< 3474#rec1ENTRY ~i := #in~i; 3580#L12 assume !(~i <= 0); 3418#L14 call #t~ret0 := rec1(~i - 2);< 3452#rec1ENTRY [2020-10-26 04:14:00,624 INFO L796 eck$LassoCheckResult]: Loop: 3452#rec1ENTRY ~i := #in~i; 3566#L12 assume !(~i <= 0); 3417#L14 call #t~ret0 := rec1(~i - 2);< 3452#rec1ENTRY [2020-10-26 04:14:00,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:14:00,624 INFO L82 PathProgramCache]: Analyzing trace with hash -744961728, now seen corresponding path program 2 times [2020-10-26 04:14:00,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:14:00,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971269168] [2020-10-26 04:14:00,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:14:00,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:14:00,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-26 04:14:00,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:14:00,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-26 04:14:00,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:14:00,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 04:14:00,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:14:00,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-26 04:14:00,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:14:00,731 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-26 04:14:00,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971269168] [2020-10-26 04:14:00,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392131570] [2020-10-26 04:14:00,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 04:14:00,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-26 04:14:00,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 04:14:00,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-26 04:14:00,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:14:00,815 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-26 04:14:00,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 04:14:00,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-26 04:14:00,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049726723] [2020-10-26 04:14:00,818 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-26 04:14:00,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:14:00,820 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 3 times [2020-10-26 04:14:00,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:14:00,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061816240] [2020-10-26 04:14:00,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:14:00,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:14:00,824 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:14:00,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:14:00,826 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:14:00,827 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:14:00,872 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 04:14:00,872 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 04:14:00,872 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 04:14:00,872 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 04:14:00,872 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-26 04:14:00,872 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:14:00,873 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 04:14:00,873 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 04:14:00,873 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration6_Loop [2020-10-26 04:14:00,873 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 04:14:00,873 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 04:14:00,874 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:14:00,879 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:14:00,891 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:14:00,901 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:14:00,905 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:14:00,912 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:14:00,948 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 04:14:00,948 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:14:00,959 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 04:14:00,959 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-26 04:14:00,964 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 04:14:00,964 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:14:00,989 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 04:14:00,989 INFO L160 nArgumentSynthesizer]: Using integer mode. 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) [2020-10-26 04:14:01,015 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-26 04:14:01,015 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:14:01,080 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-26 04:14:01,081 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 04:14:01,082 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 04:14:01,082 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 04:14:01,082 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 04:14:01,082 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-26 04:14:01,082 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:14:01,082 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 04:14:01,082 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 04:14:01,082 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration6_Loop [2020-10-26 04:14:01,082 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 04:14:01,082 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 04:14:01,083 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:14:01,086 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:14:01,095 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:14:01,097 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:14:01,100 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:14:01,103 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:14:01,139 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 04:14:01,139 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:14:01,153 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 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:14:01,154 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:14:01,155 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 04:14:01,155 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:14:01,155 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:14:01,155 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:14:01,156 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 04:14:01,156 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 04:14:01,157 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 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 [2020-10-26 04:14:01,192 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 [2020-10-26 04:14:01,194 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:14:01,194 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 04:14:01,194 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:14:01,194 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:14:01,194 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:14:01,195 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 04:14:01,195 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 04:14:01,197 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-26 04:14:01,200 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-26 04:14:01,200 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:14:01,203 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-26 04:14:01,203 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-26 04:14:01,204 INFO L510 LassoAnalysis]: Proved termination. [2020-10-26 04:14:01,204 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2020-10-26 04:14:01,236 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-26 04:14:01,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:14:01,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:14:01,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-26 04:14:01,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:14:01,346 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 04:14:01,350 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 04:14:01,354 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 04:14:01,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:14:01,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-26 04:14:01,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:14:01,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 04:14:01,416 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 [2020-10-26 04:14:01,416 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114 Second operand 5 states. [2020-10-26 04:14:01,539 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114. Second operand 5 states. Result 348 states and 455 transitions. Complement of second has 14 states. [2020-10-26 04:14:01,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-26 04:14:01,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-26 04:14:01,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 17 transitions. [2020-10-26 04:14:01,545 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 32 letters. Loop has 3 letters. [2020-10-26 04:14:01,545 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:14:01,546 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-26 04:14:01,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:14:01,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:14:01,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-26 04:14:01,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:14:01,647 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 04:14:01,656 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 04:14:01,663 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 04:14:01,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:14:01,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-26 04:14:01,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:14:01,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 04:14:01,704 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 [2020-10-26 04:14:01,704 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114 Second operand 5 states. [2020-10-26 04:14:01,843 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114. Second operand 5 states. Result 348 states and 455 transitions. Complement of second has 14 states. [2020-10-26 04:14:01,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-26 04:14:01,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-26 04:14:01,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 17 transitions. [2020-10-26 04:14:01,845 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 32 letters. Loop has 3 letters. [2020-10-26 04:14:01,845 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:14:01,845 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-26 04:14:01,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:14:01,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:14:01,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-26 04:14:01,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:14:01,984 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 04:14:01,991 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 04:14:01,997 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 04:14:02,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:14:02,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-26 04:14:02,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:14:02,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 04:14:02,061 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 [2020-10-26 04:14:02,061 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114 Second operand 5 states. [2020-10-26 04:14:02,211 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114. Second operand 5 states. Result 485 states and 616 transitions. Complement of second has 16 states. [2020-10-26 04:14:02,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-26 04:14:02,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-26 04:14:02,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 24 transitions. [2020-10-26 04:14:02,218 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 32 letters. Loop has 3 letters. [2020-10-26 04:14:02,218 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:14:02,218 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 35 letters. Loop has 3 letters. [2020-10-26 04:14:02,219 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:14:02,221 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 32 letters. Loop has 6 letters. [2020-10-26 04:14:02,222 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:14:02,223 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 485 states and 616 transitions. [2020-10-26 04:14:02,231 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 26 [2020-10-26 04:14:02,239 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 485 states to 395 states and 526 transitions. [2020-10-26 04:14:02,239 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 129 [2020-10-26 04:14:02,240 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 136 [2020-10-26 04:14:02,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 395 states and 526 transitions. [2020-10-26 04:14:02,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 04:14:02,245 INFO L691 BuchiCegarLoop]: Abstraction has 395 states and 526 transitions. [2020-10-26 04:14:02,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states and 526 transitions. [2020-10-26 04:14:02,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 351. [2020-10-26 04:14:02,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-10-26 04:14:02,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 456 transitions. [2020-10-26 04:14:02,265 INFO L714 BuchiCegarLoop]: Abstraction has 351 states and 456 transitions. [2020-10-26 04:14:02,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 04:14:02,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 04:14:02,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-26 04:14:02,267 INFO L87 Difference]: Start difference. First operand 351 states and 456 transitions. Second operand 10 states. [2020-10-26 04:14:02,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 04:14:02,399 INFO L93 Difference]: Finished difference Result 378 states and 513 transitions. [2020-10-26 04:14:02,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 04:14:02,400 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 378 states and 513 transitions. [2020-10-26 04:14:02,409 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2020-10-26 04:14:02,411 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 378 states to 104 states and 142 transitions. [2020-10-26 04:14:02,412 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 98 [2020-10-26 04:14:02,412 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 98 [2020-10-26 04:14:02,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 104 states and 142 transitions. [2020-10-26 04:14:02,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 04:14:02,413 INFO L691 BuchiCegarLoop]: Abstraction has 104 states and 142 transitions. [2020-10-26 04:14:02,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states and 142 transitions. [2020-10-26 04:14:02,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 86. [2020-10-26 04:14:02,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-26 04:14:02,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2020-10-26 04:14:02,438 INFO L714 BuchiCegarLoop]: Abstraction has 86 states and 106 transitions. [2020-10-26 04:14:02,438 INFO L594 BuchiCegarLoop]: Abstraction has 86 states and 106 transitions. [2020-10-26 04:14:02,438 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-10-26 04:14:02,438 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 86 states and 106 transitions. [2020-10-26 04:14:02,439 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2020-10-26 04:14:02,439 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 04:14:02,440 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 04:14:02,440 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-10-26 04:14:02,441 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-26 04:14:02,441 INFO L794 eck$LassoCheckResult]: Stem: 6181#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; 6182#L25 call main_#t~ret6 := rec2(main_~x~0);< 6187#rec2ENTRY ~j := #in~j; 6209#L18 assume !(~j <= 0); 6206#L20 call #t~ret3 := rec1(~j - 1);< 6208#rec1ENTRY ~i := #in~i; 6207#L12 assume !(~i <= 0); 6177#L14 call #t~ret0 := rec1(~i - 2);< 6189#rec1ENTRY ~i := #in~i; 6158#L12 assume !(~i <= 0); 6157#L14 [2020-10-26 04:14:02,441 INFO L796 eck$LassoCheckResult]: Loop: 6157#L14 call #t~ret0 := rec1(~i - 2);< 6156#rec1ENTRY ~i := #in~i; 6158#L12 assume !(~i <= 0); 6157#L14 [2020-10-26 04:14:02,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:14:02,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1371444593, now seen corresponding path program 3 times [2020-10-26 04:14:02,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:14:02,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616688132] [2020-10-26 04:14:02,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:14:02,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:14:02,456 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:14:02,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:14:02,460 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:14:02,463 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:14:02,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:14:02,464 INFO L82 PathProgramCache]: Analyzing trace with hash 54781, now seen corresponding path program 4 times [2020-10-26 04:14:02,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:14:02,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684379695] [2020-10-26 04:14:02,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:14:02,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:14:02,473 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:14:02,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:14:02,478 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:14:02,479 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:14:02,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:14:02,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1318041775, now seen corresponding path program 4 times [2020-10-26 04:14:02,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:14:02,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737253851] [2020-10-26 04:14:02,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:14:02,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:14:02,487 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:14:02,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:14:02,494 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:14:02,500 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:14:02,540 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 04:14:02,540 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 04:14:02,540 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 04:14:02,540 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 04:14:02,540 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-26 04:14:02,540 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:14:02,541 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 04:14:02,541 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 04:14:02,541 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration7_Loop [2020-10-26 04:14:02,541 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 04:14:02,541 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 04:14:02,542 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:14:02,552 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:14:02,555 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:14:02,558 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:14:02,561 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:14:02,606 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 04:14:02,606 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:14:02,613 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 04:14:02,613 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:14:02,644 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-26 04:14:02,644 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-26 04:14:06,262 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-26 04:14:06,264 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 04:14:06,264 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 04:14:06,264 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 04:14:06,264 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 04:14:06,264 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-26 04:14:06,265 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:14:06,265 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 04:14:06,265 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 04:14:06,265 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration7_Loop [2020-10-26 04:14:06,265 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 04:14:06,265 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 04:14:06,267 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:14:06,280 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:14:06,283 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:14:06,285 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:14:06,287 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:14:06,328 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 04:14:06,328 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:14:06,336 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 [2020-10-26 04:14:06,338 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:14:06,338 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 04:14:06,338 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:14:06,338 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:14:06,338 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:14:06,340 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 04:14:06,340 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:14:06,343 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-26 04:14:06,345 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-26 04:14:06,345 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:14:06,348 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-26 04:14:06,348 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-26 04:14:06,348 INFO L510 LassoAnalysis]: Proved termination. [2020-10-26 04:14:06,349 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_~i) = 1*rec1_~i Supporting invariants [] Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:14:06,379 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-26 04:14:06,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:14:06,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:14:06,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-26 04:14:06,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:14:06,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:14:06,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-26 04:14:06,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:14:06,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 04:14:06,458 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 [2020-10-26 04:14:06,458 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 86 states and 106 transitions. cyclomatic complexity: 23 Second operand 4 states. [2020-10-26 04:14:06,514 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 86 states and 106 transitions. cyclomatic complexity: 23. Second operand 4 states. Result 100 states and 124 transitions. Complement of second has 11 states. [2020-10-26 04:14:06,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-26 04:14:06,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-26 04:14:06,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2020-10-26 04:14:06,516 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 10 letters. Loop has 3 letters. [2020-10-26 04:14:06,516 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:14:06,516 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 13 letters. Loop has 3 letters. [2020-10-26 04:14:06,516 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:14:06,516 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 10 letters. Loop has 6 letters. [2020-10-26 04:14:06,516 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:14:06,516 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 100 states and 124 transitions. [2020-10-26 04:14:06,518 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2020-10-26 04:14:06,519 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 100 states to 94 states and 117 transitions. [2020-10-26 04:14:06,519 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 83 [2020-10-26 04:14:06,519 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 84 [2020-10-26 04:14:06,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 117 transitions. [2020-10-26 04:14:06,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 04:14:06,520 INFO L691 BuchiCegarLoop]: Abstraction has 94 states and 117 transitions. [2020-10-26 04:14:06,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states and 117 transitions. [2020-10-26 04:14:06,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2020-10-26 04:14:06,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-26 04:14:06,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 114 transitions. [2020-10-26 04:14:06,524 INFO L714 BuchiCegarLoop]: Abstraction has 92 states and 114 transitions. [2020-10-26 04:14:06,524 INFO L594 BuchiCegarLoop]: Abstraction has 92 states and 114 transitions. [2020-10-26 04:14:06,524 INFO L427 BuchiCegarLoop]: ======== Iteration 8============ [2020-10-26 04:14:06,524 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 92 states and 114 transitions. [2020-10-26 04:14:06,525 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2020-10-26 04:14:06,525 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 04:14:06,525 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 04:14:06,527 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 04:14:06,527 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2020-10-26 04:14:06,527 INFO L794 eck$LassoCheckResult]: Stem: 6438#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; 6407#L25 call main_#t~ret6 := rec2(main_~x~0);< 6406#rec2ENTRY ~j := #in~j; 6408#L18 assume !(~j <= 0); 6441#L20 call #t~ret3 := rec1(~j - 1);< 6442#rec1ENTRY ~i := #in~i; 6463#L12 assume !(~i <= 0); 6426#L14 call #t~ret0 := rec1(~i - 2);< 6460#rec1ENTRY ~i := #in~i; 6477#L12 assume !(~i <= 0); 6410#L14 call #t~ret0 := rec1(~i - 2);< 6409#rec1ENTRY ~i := #in~i; 6411#L12 assume ~i <= 0;#res := 0; 6497#rec1FINAL assume true; 6495#rec1EXIT >#27#return; 6419#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6425#rec1ENTRY ~i := #in~i; 6491#L12 assume ~i <= 0;#res := 0; 6490#rec1FINAL assume true; 6468#rec1EXIT >#29#return; 6469#L14-2 call #t~ret2 := rec1(#t~ret1);< 6481#rec1ENTRY ~i := #in~i; 6487#L12 assume ~i <= 0;#res := 0; 6486#rec1FINAL assume true; 6479#rec1EXIT >#31#return; 6478#L14-3 #res := 1 + #t~ret2;havoc #t~ret2;havoc #t~ret1;havoc #t~ret0; 6466#rec1FINAL assume true; 6467#rec1EXIT >#27#return; 6422#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6456#rec1ENTRY [2020-10-26 04:14:06,527 INFO L796 eck$LassoCheckResult]: Loop: 6456#rec1ENTRY ~i := #in~i; 6484#L12 assume !(~i <= 0); 6421#L14 call #t~ret0 := rec1(~i - 2);< 6439#rec1ENTRY ~i := #in~i; 6483#L12 assume !(~i <= 0); 6417#L14 call #t~ret0 := rec1(~i - 2);< 6440#rec1ENTRY ~i := #in~i; 6437#L12 assume ~i <= 0;#res := 0; 6416#rec1FINAL assume true; 6418#rec1EXIT >#27#return; 6419#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6425#rec1ENTRY ~i := #in~i; 6491#L12 assume ~i <= 0;#res := 0; 6490#rec1FINAL assume true; 6468#rec1EXIT >#29#return; 6469#L14-2 call #t~ret2 := rec1(#t~ret1);< 6481#rec1ENTRY ~i := #in~i; 6487#L12 assume ~i <= 0;#res := 0; 6486#rec1FINAL assume true; 6479#rec1EXIT >#31#return; 6478#L14-3 #res := 1 + #t~ret2;havoc #t~ret2;havoc #t~ret1;havoc #t~ret0; 6466#rec1FINAL assume true; 6467#rec1EXIT >#27#return; 6423#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6456#rec1ENTRY [2020-10-26 04:14:06,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:14:06,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1733863270, now seen corresponding path program 1 times [2020-10-26 04:14:06,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:14:06,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357320947] [2020-10-26 04:14:06,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:14:06,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:14:06,534 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:14:06,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:14:06,539 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:14:06,541 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:14:06,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:14:06,542 INFO L82 PathProgramCache]: Analyzing trace with hash -165506564, now seen corresponding path program 1 times [2020-10-26 04:14:06,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:14:06,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541068321] [2020-10-26 04:14:06,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:14:06,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:14:06,561 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:14:06,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:14:06,569 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:14:06,571 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:14:06,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:14:06,577 INFO L82 PathProgramCache]: Analyzing trace with hash 2126813793, now seen corresponding path program 2 times [2020-10-26 04:14:06,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:14:06,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995868632] [2020-10-26 04:14:06,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:14:06,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:14:06,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 04:14:06,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:14:06,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-26 04:14:06,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:14:06,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 04:14:06,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:14:06,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-26 04:14:06,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:14:06,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-26 04:14:06,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:14:06,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-26 04:14:06,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:14:06,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 04:14:06,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:14:06,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-26 04:14:06,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:14:06,687 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 24 proven. 29 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-10-26 04:14:06,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995868632] [2020-10-26 04:14:06,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585095436] [2020-10-26 04:14:06,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 04:14:06,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-26 04:14:06,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 04:14:06,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-26 04:14:06,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:14:06,750 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-26 04:14:06,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 04:14:06,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-26 04:14:06,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382806932] [2020-10-26 04:14:07,077 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 04:14:07,077 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 04:14:07,077 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 04:14:07,077 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 04:14:07,077 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-26 04:14:07,078 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:14:07,078 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 04:14:07,078 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 04:14:07,078 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration8_Loop [2020-10-26 04:14:07,078 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 04:14:07,078 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 04:14:07,079 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:14:07,083 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:14:07,088 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:14:07,090 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:14:07,100 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:14:07,104 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:14:07,157 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 04:14:07,157 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:14:07,174 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 04:14:07,174 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-26 04:14:07,177 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 04:14:07,177 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:14:07,200 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 04:14:07,200 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-26 04:14:07,203 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 04:14:07,203 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:14:07,227 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 04:14:07,227 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-26 04:14:07,229 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 04:14:07,230 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:14:07,253 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 04:14:07,253 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:14:07,278 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-26 04:14:07,279 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-26 04:14:07,282 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-26 04:14:07,306 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 04:14:07,306 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 04:14:07,306 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 04:14:07,306 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 04:14:07,307 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-26 04:14:07,307 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:14:07,307 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 04:14:07,307 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 04:14:07,307 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration8_Loop [2020-10-26 04:14:07,307 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 04:14:07,307 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 04:14:07,308 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:14:07,311 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:14:07,314 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:14:07,322 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:14:07,325 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:14:07,328 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:14:07,375 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 04:14:07,375 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:14:07,381 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 [2020-10-26 04:14:07,383 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:14:07,383 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 04:14:07,383 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:14:07,383 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:14:07,383 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:14:07,390 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 04:14:07,391 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 04:14:07,392 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:14:07,418 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 [2020-10-26 04:14:07,419 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:14:07,419 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 04:14:07,419 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:14:07,419 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:14:07,419 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:14:07,420 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 04:14:07,420 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 04:14:07,421 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:14:07,447 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 [2020-10-26 04:14:07,448 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:14:07,448 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 04:14:07,449 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:14:07,449 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:14:07,449 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:14:07,450 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 04:14:07,450 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 04:14:07,455 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-26 04:14:07,462 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-26 04:14:07,462 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:14:07,465 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-26 04:14:07,466 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-26 04:14:07,466 INFO L510 LassoAnalysis]: Proved termination. [2020-10-26 04:14:07,466 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 60 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:14:07,493 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-26 04:14:07,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:14:07,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:14:07,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-26 04:14:07,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:14:07,597 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 04:14:07,600 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 04:14:07,603 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 04:14:07,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:14:07,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-26 04:14:07,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:14:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-26 04:14:07,842 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2020-10-26 04:14:07,842 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26 Second operand 11 states. [2020-10-26 04:14:07,922 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26. Second operand 11 states. Result 100 states and 122 transitions. Complement of second has 7 states. [2020-10-26 04:14:07,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2020-10-26 04:14:07,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-26 04:14:07,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2020-10-26 04:14:07,924 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 29 letters. Loop has 24 letters. [2020-10-26 04:14:07,924 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:14:07,924 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-26 04:14:07,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:14:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:14:07,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-26 04:14:07,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:14:08,017 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 04:14:08,020 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 04:14:08,023 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 04:14:08,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:14:08,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-26 04:14:08,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:14:08,221 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-26 04:14:08,222 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 9 loop predicates [2020-10-26 04:14:08,222 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26 Second operand 11 states. [2020-10-26 04:14:08,327 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26. Second operand 11 states. Result 100 states and 122 transitions. Complement of second has 7 states. [2020-10-26 04:14:08,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2020-10-26 04:14:08,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-26 04:14:08,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2020-10-26 04:14:08,332 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 29 letters. Loop has 24 letters. [2020-10-26 04:14:08,333 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:14:08,333 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-26 04:14:08,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:14:08,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:14:08,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-26 04:14:08,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:14:08,439 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 04:14:08,443 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 04:14:08,450 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 04:14:08,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:14:08,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-26 04:14:08,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:14:08,667 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-26 04:14:08,668 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2020-10-26 04:14:08,668 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26 Second operand 11 states. [2020-10-26 04:14:09,111 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26. Second operand 11 states. Result 257 states and 303 transitions. Complement of second has 31 states. [2020-10-26 04:14:09,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2020-10-26 04:14:09,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-26 04:14:09,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 38 transitions. [2020-10-26 04:14:09,112 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 38 transitions. Stem has 29 letters. Loop has 24 letters. [2020-10-26 04:14:09,114 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:14:09,117 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-26 04:14:09,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:14:09,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:14:09,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-26 04:14:09,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:14:09,214 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 04:14:09,217 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 04:14:09,221 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 04:14:09,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:14:09,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-26 04:14:09,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:14:09,466 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-26 04:14:09,467 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and with honda bouncer for loop.2 stem predicates 9 loop predicates [2020-10-26 04:14:09,467 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26 Second operand 11 states. [2020-10-26 04:14:10,266 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26. Second operand 11 states. Result 409 states and 515 transitions. Complement of second has 80 states. [2020-10-26 04:14:10,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 15 states 2 stem states 12 non-accepting loop states 1 accepting loop states [2020-10-26 04:14:10,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-26 04:14:10,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 49 transitions. [2020-10-26 04:14:10,270 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 49 transitions. Stem has 29 letters. Loop has 24 letters. [2020-10-26 04:14:10,270 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:14:10,273 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 49 transitions. Stem has 53 letters. Loop has 24 letters. [2020-10-26 04:14:10,274 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:14:10,275 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 49 transitions. Stem has 29 letters. Loop has 48 letters. [2020-10-26 04:14:10,276 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:14:10,277 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 409 states and 515 transitions. [2020-10-26 04:14:10,286 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 62 [2020-10-26 04:14:10,291 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 409 states to 253 states and 345 transitions. [2020-10-26 04:14:10,291 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 154 [2020-10-26 04:14:10,291 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 164 [2020-10-26 04:14:10,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 253 states and 345 transitions. [2020-10-26 04:14:10,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 04:14:10,292 INFO L691 BuchiCegarLoop]: Abstraction has 253 states and 345 transitions. [2020-10-26 04:14:10,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states and 345 transitions. [2020-10-26 04:14:10,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 216. [2020-10-26 04:14:10,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-26 04:14:10,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 270 transitions. [2020-10-26 04:14:10,303 INFO L714 BuchiCegarLoop]: Abstraction has 216 states and 270 transitions. [2020-10-26 04:14:10,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 04:14:10,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 04:14:10,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-26 04:14:10,304 INFO L87 Difference]: Start difference. First operand 216 states and 270 transitions. Second operand 8 states. [2020-10-26 04:14:10,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 04:14:10,374 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-10-26 04:14:10,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 04:14:10,374 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 35 states and 37 transitions. [2020-10-26 04:14:10,375 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-26 04:14:10,375 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 35 states to 0 states and 0 transitions. [2020-10-26 04:14:10,375 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-26 04:14:10,376 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-26 04:14:10,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-26 04:14:10,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-26 04:14:10,376 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-26 04:14:10,376 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-26 04:14:10,376 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-26 04:14:10,376 INFO L427 BuchiCegarLoop]: ======== Iteration 9============ [2020-10-26 04:14:10,376 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-10-26 04:14:10,376 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-26 04:14:10,376 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-10-26 04:14:10,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 26.10 04:14:10 BoogieIcfgContainer [2020-10-26 04:14:10,383 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-26 04:14:10,384 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-26 04:14:10,384 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-26 04:14:10,384 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-26 04:14:10,385 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 04:13:51" (3/4) ... [2020-10-26 04:14:10,388 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-26 04:14:10,389 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-26 04:14:10,390 INFO L168 Benchmark]: Toolchain (without parser) took 19685.86 ms. Allocated memory was 41.9 MB in the beginning and 130.0 MB in the end (delta: 88.1 MB). Free memory was 19.9 MB in the beginning and 85.4 MB in the end (delta: -65.5 MB). Peak memory consumption was 23.9 MB. Max. memory is 16.1 GB. [2020-10-26 04:14:10,391 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 41.9 MB. Free memory was 22.4 MB in the beginning and 22.3 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 04:14:10,391 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.94 ms. Allocated memory is still 41.9 MB. Free memory was 19.3 MB in the beginning and 22.1 MB in the end (delta: -2.8 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2020-10-26 04:14:10,392 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.49 ms. Allocated memory is still 41.9 MB. Free memory was 22.1 MB in the beginning and 20.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-26 04:14:10,392 INFO L168 Benchmark]: Boogie Preprocessor took 21.47 ms. Allocated memory is still 41.9 MB. Free memory was 20.8 MB in the beginning and 20.0 MB in the end (delta: 821.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 04:14:10,393 INFO L168 Benchmark]: RCFGBuilder took 319.01 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 20.0 MB in the beginning and 28.8 MB in the end (delta: -8.8 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. [2020-10-26 04:14:10,394 INFO L168 Benchmark]: BuchiAutomizer took 19036.48 ms. Allocated memory was 50.3 MB in the beginning and 130.0 MB in the end (delta: 79.7 MB). Free memory was 28.8 MB in the beginning and 86.4 MB in the end (delta: -57.6 MB). Peak memory consumption was 21.7 MB. Max. memory is 16.1 GB. [2020-10-26 04:14:10,394 INFO L168 Benchmark]: Witness Printer took 4.87 ms. Allocated memory is still 130.0 MB. Free memory was 86.4 MB in the beginning and 85.4 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 04:14:10,397 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 41.9 MB. Free memory was 22.4 MB in the beginning and 22.3 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 250.94 ms. Allocated memory is still 41.9 MB. Free memory was 19.3 MB in the beginning and 22.1 MB in the end (delta: -2.8 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.49 ms. Allocated memory is still 41.9 MB. Free memory was 22.1 MB in the beginning and 20.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.47 ms. Allocated memory is still 41.9 MB. Free memory was 20.8 MB in the beginning and 20.0 MB in the end (delta: 821.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 319.01 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 20.0 MB in the beginning and 28.8 MB in the end (delta: -8.8 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 19036.48 ms. Allocated memory was 50.3 MB in the beginning and 130.0 MB in the end (delta: 79.7 MB). Free memory was 28.8 MB in the beginning and 86.4 MB in the end (delta: -57.6 MB). Peak memory consumption was 21.7 MB. Max. memory is 16.1 GB. * Witness Printer took 4.87 ms. Allocated memory is still 130.0 MB. Free memory was 86.4 MB in the beginning and 85.4 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 12 terminating modules (5 trivial, 5 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(j) and consists of 11 locations. One deterministic module has affine ranking function \old(i) and consists of 4 locations. One deterministic module has affine ranking function \old(i) and consists of 5 locations. One deterministic module has affine ranking function org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@46c3ede0 and consists of 11 locations. One deterministic module has affine ranking function i and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 15 locations. 5 modules have a trivial ranking function, the largest among these consists of 11 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 18.9s and 9 iterations. TraceHistogramMax:5. Analysis of lassos took 11.2s. Construction of modules took 1.4s. Büchi inclusion checks took 5.6s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 11. Automata minimization 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 249 StatesRemovedByMinimization, 11 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had 314 states and ocurred in iteration 5. Nontrivial modules had stage [5, 0, 1, 1, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 38/58 HoareTripleCheckerStatistics: 288 SDtfs, 338 SDslu, 505 SDs, 0 SdLazy, 952 SolverSat, 325 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time LassoAnalysisResults: nont0 unkn0 SFLI1 SFLT3 conc0 concLT3 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital13 mio100 ax100 hnf92 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq155 hnf92 smp100 dnf100 smp100 tf112 neg100 sie110 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 19ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 14 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 7 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 5.8s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...