./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 906a4fb5 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.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 1b7166d94206693c3f254a3c1de8d5825f8510fb ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM) --- Real Ultimate output --- This is Ultimate 0.1.25-906a4fb [2020-10-19 18:40:07,231 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 18:40:07,237 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 18:40:07,279 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 18:40:07,279 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 18:40:07,289 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 18:40:07,290 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 18:40:07,294 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 18:40:07,296 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 18:40:07,296 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 18:40:07,299 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 18:40:07,301 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 18:40:07,301 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 18:40:07,306 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 18:40:07,307 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 18:40:07,309 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 18:40:07,311 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 18:40:07,313 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 18:40:07,315 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 18:40:07,322 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 18:40:07,325 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 18:40:07,326 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 18:40:07,328 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 18:40:07,329 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 18:40:07,340 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 18:40:07,340 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 18:40:07,341 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 18:40:07,344 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 18:40:07,344 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 18:40:07,345 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 18:40:07,345 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 18:40:07,346 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 18:40:07,347 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 18:40:07,348 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 18:40:07,349 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 18:40:07,350 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 18:40:07,351 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 18:40:07,351 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 18:40:07,351 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 18:40:07,352 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 18:40:07,353 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 18:40:07,354 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-10-19 18:40:07,401 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 18:40:07,402 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 18:40:07,404 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 18:40:07,404 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 18:40:07,404 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 18:40:07,405 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-19 18:40:07,405 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-19 18:40:07,405 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-19 18:40:07,405 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-19 18:40:07,406 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-19 18:40:07,407 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-19 18:40:07,407 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 18:40:07,408 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 18:40:07,408 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 18:40:07,408 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 18:40:07,409 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-19 18:40:07,409 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-19 18:40:07,409 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-19 18:40:07,410 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 18:40:07,410 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-19 18:40:07,410 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 18:40:07,410 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-19 18:40:07,411 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 18:40:07,411 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 18:40:07,411 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-19 18:40:07,412 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 18:40:07,412 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 18:40:07,412 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 18:40:07,412 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-19 18:40:07,414 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-19 18:40:07,414 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b7166d94206693c3f254a3c1de8d5825f8510fb [2020-10-19 18:40:07,750 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 18:40:07,762 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 18:40:07,766 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 18:40:07,767 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 18:40:07,767 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 18:40:07,768 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c [2020-10-19 18:40:07,816 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7c6472f7/5dbad9dabee8469eb581ad5225de5f70/FLAGe7bce9be0 [2020-10-19 18:40:08,227 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 18:40:08,228 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c [2020-10-19 18:40:08,234 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7c6472f7/5dbad9dabee8469eb581ad5225de5f70/FLAGe7bce9be0 [2020-10-19 18:40:08,664 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7c6472f7/5dbad9dabee8469eb581ad5225de5f70 [2020-10-19 18:40:08,668 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 18:40:08,675 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 18:40:08,676 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 18:40:08,677 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 18:40:08,681 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 18:40:08,682 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:40:08" (1/1) ... [2020-10-19 18:40:08,686 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a9d0478 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:40:08, skipping insertion in model container [2020-10-19 18:40:08,687 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:40:08" (1/1) ... [2020-10-19 18:40:08,696 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 18:40:08,715 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 18:40:08,878 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:40:08,883 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 18:40:08,899 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:40:08,915 INFO L208 MainTranslator]: Completed translation [2020-10-19 18:40:08,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:40:08 WrapperNode [2020-10-19 18:40:08,915 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 18:40:08,916 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 18:40:08,916 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 18:40:08,917 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 18:40:08,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:40:08" (1/1) ... [2020-10-19 18:40:08,932 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:40:08" (1/1) ... [2020-10-19 18:40:09,037 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 18:40:09,037 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 18:40:09,038 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 18:40:09,038 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 18:40:09,049 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:40:08" (1/1) ... [2020-10-19 18:40:09,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:40:08" (1/1) ... [2020-10-19 18:40:09,050 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:40:08" (1/1) ... [2020-10-19 18:40:09,050 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:40:08" (1/1) ... [2020-10-19 18:40:09,052 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:40:08" (1/1) ... [2020-10-19 18:40:09,056 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:40:08" (1/1) ... [2020-10-19 18:40:09,057 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:40:08" (1/1) ... [2020-10-19 18:40:09,058 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 18:40:09,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 18:40:09,059 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 18:40:09,059 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 18:40:09,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:40:08" (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 [2020-10-19 18:40:09,147 INFO L130 BoogieDeclarations]: Found specification of procedure g [2020-10-19 18:40:09,147 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2020-10-19 18:40:09,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 18:40:09,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 18:40:09,351 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 18:40:09,352 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-19 18:40:09,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:40:09 BoogieIcfgContainer [2020-10-19 18:40:09,354 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 18:40:09,356 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-19 18:40:09,356 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-19 18:40:09,361 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-19 18:40:09,362 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 18:40:09,362 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 19.10 06:40:08" (1/3) ... [2020-10-19 18:40:09,364 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@61056547 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 06:40:09, skipping insertion in model container [2020-10-19 18:40:09,364 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 18:40:09,364 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:40:08" (2/3) ... [2020-10-19 18:40:09,365 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@61056547 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 06:40:09, skipping insertion in model container [2020-10-19 18:40:09,365 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 18:40:09,365 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:40:09" (3/3) ... [2020-10-19 18:40:09,367 INFO L373 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_2b.c [2020-10-19 18:40:09,461 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-19 18:40:09,461 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-19 18:40:09,461 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-19 18:40:09,463 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 18:40:09,463 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 18:40:09,463 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-19 18:40:09,463 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 18:40:09,463 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-19 18:40:09,486 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states. [2020-10-19 18:40:09,523 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-10-19 18:40:09,523 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:40:09,524 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:40:09,535 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-19 18:40:09,536 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-19 18:40:09,536 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-19 18:40:09,537 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states. [2020-10-19 18:40:09,540 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-10-19 18:40:09,540 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:40:09,541 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:40:09,541 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-19 18:40:09,541 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-19 18:40:09,552 INFO L794 eck$LassoCheckResult]: Stem: 10#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 7#L20true assume !(main_~x~0 < 0); 9#L21true call main_#t~ret3 := g(main_~x~0);< 11#gENTRYtrue [2020-10-19 18:40:09,552 INFO L796 eck$LassoCheckResult]: Loop: 11#gENTRYtrue ~x := #in~x; 3#L12true assume !(0 == ~x); 13#L15true call #t~ret0 := g(~x - 1);< 11#gENTRYtrue [2020-10-19 18:40:09,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:40:09,559 INFO L82 PathProgramCache]: Analyzing trace with hash 39891, now seen corresponding path program 1 times [2020-10-19 18:40:09,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:40:09,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643658301] [2020-10-19 18:40:09,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:40:09,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:09,655 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:09,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:09,660 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:09,679 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:40:09,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:40:09,681 INFO L82 PathProgramCache]: Analyzing trace with hash 29936, now seen corresponding path program 1 times [2020-10-19 18:40:09,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:40:09,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591996765] [2020-10-19 18:40:09,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:40:09,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:09,701 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:09,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:09,705 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:09,706 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:40:09,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:40:09,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1188392926, now seen corresponding path program 1 times [2020-10-19 18:40:09,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:40:09,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106354333] [2020-10-19 18:40:09,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:40:09,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:09,721 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:09,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:09,733 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:09,736 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:40:09,850 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:40:09,851 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:40:09,851 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:40:09,852 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:40:09,852 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:40:09,852 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:09,852 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:40:09,853 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:40:09,854 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration1_Loop [2020-10-19 18:40:09,854 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:40:09,854 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:40:09,913 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:40:09,924 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:40:09,939 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:40:09,947 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:40:09,962 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:40:10,052 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:40:10,054 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) [2020-10-19 18:40:10,066 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:40:10,067 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:10,077 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:40:10,078 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_~x=0} Honda state: {g_~x=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 [2020-10-19 18:40:10,103 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:40:10,103 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:40:10,110 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:40:10,110 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret1=0} Honda state: {g_#t~ret1=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) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:10,134 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:40:10,135 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:40:10,138 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:40:10,139 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:10,170 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:40:10,170 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:40:10,174 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:40:10,174 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret0=0} Honda state: {g_#t~ret0=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) [2020-10-19 18:40:10,198 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:40:10,198 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 [2020-10-19 18:40:10,229 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:40:10,230 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:40:10,251 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:40:10,252 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#in~x=-6} Honda state: {g_#in~x=-6} Generalized eigenvectors: [{g_#in~x=0}, {g_#in~x=-1}, {g_#in~x=0}] Lambdas: [7, 1, 0] Nus: [0, 0] [2020-10-19 18:40:10,305 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:40:10,306 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:40:10,306 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:40:10,306 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:40:10,306 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:40:10,306 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:10,306 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:40:10,307 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:40:10,307 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration1_Lasso [2020-10-19 18:40:10,307 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:40:10,307 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:40:10,309 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:40:10,313 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:40:10,317 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:40:10,320 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:40:10,324 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:40:10,327 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:40:10,331 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:40:10,341 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:40:10,344 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:40:10,348 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:40:10,430 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:40:10,430 INFO L404 LassoAnalysis]: Checking for nontermination... 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) [2020-10-19 18:40:10,443 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:40:10,443 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:10,447 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:40:10,447 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#res=0} Honda state: {ULTIMATE.start_main_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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) [2020-10-19 18:40:10,484 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:40:10,484 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:10,488 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:40:10,488 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret1=0} Honda state: {g_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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 [2020-10-19 18:40:10,527 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:40:10,527 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:40:10,533 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:40:10,533 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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 [2020-10-19 18:40:10,574 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:40:10,574 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:40:10,578 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:40:10,578 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret0=0} Honda state: {g_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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) [2020-10-19 18:40:10,614 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:40:10,614 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:10,617 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:40:10,617 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_#t~ret4=0} Honda state: {ULTIMATE.start_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:10,643 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:40:10,643 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:40:10,646 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:40:10,646 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~nondet2=0} Honda state: {ULTIMATE.start_main_#t~nondet2=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) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:10,680 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:40:10,680 INFO L160 nArgumentSynthesizer]: Using integer mode. 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) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:10,710 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:40:10,710 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:40:10,754 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 18:40:10,756 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:40:10,756 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:40:10,756 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:40:10,756 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:40:10,756 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:40:10,757 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:10,757 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:40:10,757 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:40:10,757 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration1_Lasso [2020-10-19 18:40:10,757 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:40:10,757 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:40:10,759 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:40:10,763 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:40:10,766 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:40:10,774 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:40:10,777 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:40:10,780 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:40:10,785 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:40:10,788 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:40:10,793 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:40:10,796 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:40:10,870 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:40:10,876 INFO L489 LassoAnalysis]: Using template 'affine'. 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) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:10,889 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 [2020-10-19 18:40:10,892 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:40:10,893 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:40:10,893 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:40:10,894 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:40:10,894 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:40:10,897 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:40:10,897 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:40:10,900 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 17 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 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:10,935 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 [2020-10-19 18:40:10,937 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:40:10,937 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:40:10,937 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:40:10,938 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:40:10,938 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:40:10,939 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:40:10,939 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:40:10,941 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 18 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 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:10,984 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 [2020-10-19 18:40:10,986 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:40:10,987 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:40:10,987 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:40:10,987 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:40:10,987 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:40:10,988 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:40:10,989 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:40:10,990 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 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:40:11,038 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 [2020-10-19 18:40:11,041 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:40:11,041 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:40:11,041 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:40:11,041 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:40:11,042 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:40:11,043 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:40:11,043 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:11,045 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:40:11,099 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 [2020-10-19 18:40:11,102 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:40:11,102 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:40:11,102 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:40:11,103 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:40:11,103 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:40:11,104 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:40:11,104 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 [2020-10-19 18:40:11,107 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) [2020-10-19 18:40:11,172 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 [2020-10-19 18:40:11,175 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:40:11,175 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:11,176 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:40:11,176 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:40:11,177 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:40:11,178 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:40:11,178 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:40:11,180 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) [2020-10-19 18:40:11,219 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 [2020-10-19 18:40:11,221 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:40:11,221 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:40:11,221 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:40:11,221 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:40:11,222 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:40:11,223 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:40:11,223 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:11,225 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:40:11,263 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 [2020-10-19 18:40:11,265 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:40:11,265 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:40:11,266 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:40:11,266 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:40:11,266 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:40:11,267 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:40:11,267 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:11,270 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:40:11,312 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 [2020-10-19 18:40:11,315 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:40:11,315 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:40:11,315 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:40:11,316 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:40:11,316 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:40:11,317 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:40:11,317 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:11,320 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 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:40:11,361 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 [2020-10-19 18:40:11,364 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:40:11,364 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:40:11,364 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2020-10-19 18:40:11,364 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:11,376 INFO L401 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2020-10-19 18:40:11,377 INFO L402 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2020-10-19 18:40:11,395 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 18:40:11,421 INFO L443 ModelExtractionUtils]: Simplification made 10 calls to the SMT solver. [2020-10-19 18:40:11,421 INFO L444 ModelExtractionUtils]: 1 out of 11 variables were initially zero. Simplification set additionally 7 variables to zero. 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) [2020-10-19 18:40:11,427 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:11,432 INFO L438 nArgumentSynthesizer]: Removed 3 redundant supporting invariants from a total of 4. [2020-10-19 18:40:11,433 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:40:11,434 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(g_#in~x) = 1*g_#in~x Supporting invariants [1*g_#in~x >= 0] [2020-10-19 18:40:11,477 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2020-10-19 18:40:11,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:40:11,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:40:11,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 18:40:11,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:40:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:40:11,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-19 18:40:11,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:40:11,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:40:11,612 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 [2020-10-19 18:40:11,614 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states. Second operand 5 states. [2020-10-19 18:40:11,751 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 14 states.. Second operand 5 states. Result 35 states and 42 transitions. Complement of second has 13 states. [2020-10-19 18:40:11,751 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 [2020-10-19 18:40:11,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-19 18:40:11,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 11 transitions. [2020-10-19 18:40:11,757 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 11 transitions. Stem has 3 letters. Loop has 3 letters. [2020-10-19 18:40:11,758 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:40:11,758 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 11 transitions. Stem has 6 letters. Loop has 3 letters. [2020-10-19 18:40:11,759 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:40:11,759 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 11 transitions. Stem has 3 letters. Loop has 6 letters. [2020-10-19 18:40:11,759 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:40:11,761 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 35 states and 42 transitions. [2020-10-19 18:40:11,765 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-10-19 18:40:11,773 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 35 states to 19 states and 25 transitions. [2020-10-19 18:40:11,774 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2020-10-19 18:40:11,775 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 14 [2020-10-19 18:40:11,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 25 transitions. [2020-10-19 18:40:11,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:40:11,778 INFO L691 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2020-10-19 18:40:11,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 25 transitions. [2020-10-19 18:40:11,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-10-19 18:40:11,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-19 18:40:11,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2020-10-19 18:40:11,814 INFO L714 BuchiCegarLoop]: Abstraction has 17 states and 21 transitions. [2020-10-19 18:40:11,814 INFO L594 BuchiCegarLoop]: Abstraction has 17 states and 21 transitions. [2020-10-19 18:40:11,815 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-19 18:40:11,815 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 21 transitions. [2020-10-19 18:40:11,816 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-10-19 18:40:11,816 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:40:11,817 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:40:11,818 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:40:11,818 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2020-10-19 18:40:11,818 INFO L794 eck$LassoCheckResult]: Stem: 120#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 121#L20 assume !(main_~x~0 < 0); 118#L21 call main_#t~ret3 := g(main_~x~0);< 119#gENTRY ~x := #in~x; 117#L12 assume !(0 == ~x); 115#L15 call #t~ret0 := g(~x - 1);< 122#gENTRY ~x := #in~x; 114#L12 assume 0 == ~x;#res := 1; 116#gFINAL assume true; 123#gEXIT >#22#return; 125#L15-1 [2020-10-19 18:40:11,819 INFO L796 eck$LassoCheckResult]: Loop: 125#L15-1 call #t~ret1 := g(1 + #t~ret0);< 126#gENTRY ~x := #in~x; 129#L12 assume !(0 == ~x); 124#L15 call #t~ret0 := g(~x - 1);< 126#gENTRY ~x := #in~x; 129#L12 assume 0 == ~x;#res := 1; 128#gFINAL assume true; 130#gEXIT >#22#return; 125#L15-1 [2020-10-19 18:40:11,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:40:11,819 INFO L82 PathProgramCache]: Analyzing trace with hash -54633169, now seen corresponding path program 1 times [2020-10-19 18:40:11,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:40:11,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275583803] [2020-10-19 18:40:11,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:40:11,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:11,828 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:11,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:11,835 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:11,838 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:40:11,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:40:11,839 INFO L82 PathProgramCache]: Analyzing trace with hash -243608724, now seen corresponding path program 1 times [2020-10-19 18:40:11,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:40:11,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331545044] [2020-10-19 18:40:11,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:40:11,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:11,847 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:11,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:11,854 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:11,856 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:40:11,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:40:11,857 INFO L82 PathProgramCache]: Analyzing trace with hash -791141734, now seen corresponding path program 1 times [2020-10-19 18:40:11,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:40:11,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457015079] [2020-10-19 18:40:11,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:40:11,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:40:11,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-19 18:40:11,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:40:11,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-19 18:40:11,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:40:11,976 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-19 18:40:11,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457015079] [2020-10-19 18:40:11,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712059246] [2020-10-19 18:40:11,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-10-19 18:40:12,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:40:12,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:40:12,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:40:12,066 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-19 18:40:12,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:40:12,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-10-19 18:40:12,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926688299] [2020-10-19 18:40:12,224 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:40:12,225 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:40:12,225 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:40:12,225 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:40:12,225 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:40:12,225 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:12,225 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:40:12,225 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:40:12,225 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration2_Loop [2020-10-19 18:40:12,226 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:40:12,226 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:40:12,227 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:40:12,237 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:40:12,240 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:40:12,283 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:40:12,283 INFO L404 LassoAnalysis]: Checking for nontermination... 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) [2020-10-19 18:40:12,286 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:40:12,286 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 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) [2020-10-19 18:40:12,325 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:40:12,325 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:15,334 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 18:40:15,336 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:40:15,336 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:40:15,336 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:40:15,336 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:40:15,337 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:40:15,337 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:15,337 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:40:15,337 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:40:15,337 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration2_Loop [2020-10-19 18:40:15,337 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:40:15,337 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:40:15,338 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:40:15,342 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:40:15,354 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:40:15,393 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:40:15,393 INFO L489 LassoAnalysis]: Using template 'affine'. 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) [2020-10-19 18:40:15,408 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 [2020-10-19 18:40:15,411 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:40:15,411 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:40:15,411 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:40:15,412 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:40:15,412 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:40:15,413 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:40:15,413 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:15,419 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:40:15,452 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 [2020-10-19 18:40:15,454 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:40:15,454 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:40:15,454 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:40:15,454 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:40:15,454 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:40:15,456 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:40:15,456 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:40:15,459 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:15,468 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 18:40:15,468 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:40:15,473 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 18:40:15,473 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 18:40:15,474 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:40:15,474 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(g_#t~ret0) = -2*g_#t~ret0 + 1 Supporting invariants [] Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:15,506 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 18:40:15,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:40:15,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:40:15,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 18:40:15,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:40:15,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:40:15,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-19 18:40:15,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:40:15,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:40:15,743 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2020-10-19 18:40:15,744 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states and 21 transitions. cyclomatic complexity: 6 Second operand 8 states. [2020-10-19 18:40:16,064 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states and 21 transitions. cyclomatic complexity: 6. Second operand 8 states. Result 82 states and 120 transitions. Complement of second has 31 states. [2020-10-19 18:40:16,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2020-10-19 18:40:16,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-19 18:40:16,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 36 transitions. [2020-10-19 18:40:16,070 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 10 letters. Loop has 8 letters. [2020-10-19 18:40:16,071 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:40:16,071 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 18 letters. Loop has 8 letters. [2020-10-19 18:40:16,072 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:40:16,072 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 10 letters. Loop has 16 letters. [2020-10-19 18:40:16,072 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:40:16,073 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 82 states and 120 transitions. [2020-10-19 18:40:16,081 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2020-10-19 18:40:16,087 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 82 states to 58 states and 81 transitions. [2020-10-19 18:40:16,088 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 44 [2020-10-19 18:40:16,088 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 45 [2020-10-19 18:40:16,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 81 transitions. [2020-10-19 18:40:16,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:40:16,089 INFO L691 BuchiCegarLoop]: Abstraction has 58 states and 81 transitions. [2020-10-19 18:40:16,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states and 81 transitions. [2020-10-19 18:40:16,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-10-19 18:40:16,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-19 18:40:16,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2020-10-19 18:40:16,101 INFO L714 BuchiCegarLoop]: Abstraction has 52 states and 71 transitions. [2020-10-19 18:40:16,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:40:16,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-19 18:40:16,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-19 18:40:16,106 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand 10 states. [2020-10-19 18:40:16,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:40:16,191 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-10-19 18:40:16,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 18:40:16,192 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 39 states and 44 transitions. [2020-10-19 18:40:16,194 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2020-10-19 18:40:16,195 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 39 states to 30 states and 34 transitions. [2020-10-19 18:40:16,196 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2020-10-19 18:40:16,196 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 25 [2020-10-19 18:40:16,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 34 transitions. [2020-10-19 18:40:16,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:40:16,196 INFO L691 BuchiCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-19 18:40:16,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states and 34 transitions. [2020-10-19 18:40:16,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2020-10-19 18:40:16,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-19 18:40:16,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-19 18:40:16,201 INFO L714 BuchiCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-19 18:40:16,201 INFO L594 BuchiCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-19 18:40:16,201 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-19 18:40:16,201 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 25 states and 27 transitions. [2020-10-19 18:40:16,202 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2020-10-19 18:40:16,202 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:40:16,203 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:40:16,203 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:40:16,204 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-19 18:40:16,204 INFO L794 eck$LassoCheckResult]: Stem: 502#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 503#L20 assume !(main_~x~0 < 0); 495#L21 call main_#t~ret3 := g(main_~x~0);< 496#gENTRY ~x := #in~x; 500#L12 assume !(0 == ~x); 501#L15 call #t~ret0 := g(~x - 1);< 507#gENTRY ~x := #in~x; 508#L12 assume 0 == ~x;#res := 1; 509#gFINAL assume true; 510#gEXIT >#22#return; 505#L15-1 call #t~ret1 := g(1 + #t~ret0);< 504#gENTRY ~x := #in~x; 506#L12 assume !(0 == ~x); 514#L15 call #t~ret0 := g(~x - 1);< 518#gENTRY ~x := #in~x; 517#L12 assume !(0 == ~x); 513#L15 [2020-10-19 18:40:16,204 INFO L796 eck$LassoCheckResult]: Loop: 513#L15 call #t~ret0 := g(~x - 1);< 511#gENTRY ~x := #in~x; 515#L12 assume !(0 == ~x); 513#L15 [2020-10-19 18:40:16,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:40:16,205 INFO L82 PathProgramCache]: Analyzing trace with hash 2001409165, now seen corresponding path program 2 times [2020-10-19 18:40:16,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:40:16,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152645334] [2020-10-19 18:40:16,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:40:16,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:16,215 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:16,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:16,222 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:16,225 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:40:16,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:40:16,226 INFO L82 PathProgramCache]: Analyzing trace with hash 49976, now seen corresponding path program 2 times [2020-10-19 18:40:16,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:40:16,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138039760] [2020-10-19 18:40:16,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:40:16,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:16,230 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:16,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:16,233 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:16,235 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:40:16,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:40:16,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1244451628, now seen corresponding path program 3 times [2020-10-19 18:40:16,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:40:16,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739817492] [2020-10-19 18:40:16,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:40:16,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:40:16,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-19 18:40:16,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:40:16,374 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-19 18:40:16,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739817492] [2020-10-19 18:40:16,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144403945] [2020-10-19 18:40:16,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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) [2020-10-19 18:40:16,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-19 18:40:16,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:40:16,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-19 18:40:16,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:40:16,429 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-19 18:40:16,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:40:16,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-19 18:40:16,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295986826] [2020-10-19 18:40:16,464 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:40:16,464 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:40:16,464 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:40:16,464 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:40:16,465 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:40:16,465 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:16,465 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:40:16,465 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:40:16,465 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration3_Loop [2020-10-19 18:40:16,466 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:40:16,466 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:40:16,467 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:40:16,475 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:40:16,477 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:40:16,479 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:40:16,522 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:40:16,522 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) [2020-10-19 18:40:16,531 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:40:16,531 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:16,565 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:40:16,565 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:40:16,717 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:40:16,718 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#in~x=-8, g_~x=-8} Honda state: {g_#in~x=-8, g_~x=-8} Generalized eigenvectors: [{g_#in~x=-1, g_~x=-1}, {g_#in~x=0, g_~x=0}, {g_#in~x=0, g_~x=0}] Lambdas: [1, 14, 10] Nus: [1, 0] 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) [2020-10-19 18:40:16,739 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:40:16,740 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:16,743 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:40:16,743 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret1=0} Honda state: {g_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:16,767 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:40:16,767 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:40:16,770 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:40:16,770 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:16,794 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:40:16,794 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:40:16,797 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:40:16,797 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret0=0} Honda state: {g_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2020-10-19 18:40:16,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:40:16,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-19 18:40:16,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-19 18:40:16,818 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. cyclomatic complexity: 4 Second operand 10 states. [2020-10-19 18:40:17,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:40:17,012 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2020-10-19 18:40:17,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-19 18:40:17,013 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 28 transitions. [2020-10-19 18:40:17,014 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2020-10-19 18:40:17,016 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 27 states and 28 transitions. [2020-10-19 18:40:17,016 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 24 [2020-10-19 18:40:17,016 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 24 [2020-10-19 18:40:17,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 28 transitions. [2020-10-19 18:40:17,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:40:17,017 INFO L691 BuchiCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-10-19 18:40:17,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states and 28 transitions. [2020-10-19 18:40:17,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2020-10-19 18:40:17,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-19 18:40:17,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-19 18:40:17,020 INFO L714 BuchiCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-19 18:40:17,020 INFO L594 BuchiCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-19 18:40:17,020 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-10-19 18:40:17,020 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states and 22 transitions. [2020-10-19 18:40:17,021 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2020-10-19 18:40:17,021 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:40:17,021 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:40:17,021 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:40:17,022 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 1, 1, 1, 1] [2020-10-19 18:40:17,022 INFO L794 eck$LassoCheckResult]: Stem: 639#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 640#L20 assume !(main_~x~0 < 0); 632#L21 call main_#t~ret3 := g(main_~x~0);< 633#gENTRY ~x := #in~x; 637#L12 assume !(0 == ~x); 638#L15 call #t~ret0 := g(~x - 1);< 642#gENTRY ~x := #in~x; 643#L12 assume 0 == ~x;#res := 1; 650#gFINAL assume true; 648#gEXIT >#22#return; 635#L15-1 [2020-10-19 18:40:17,022 INFO L796 eck$LassoCheckResult]: Loop: 635#L15-1 call #t~ret1 := g(1 + #t~ret0);< 641#gENTRY ~x := #in~x; 634#L12 assume !(0 == ~x); 636#L15 call #t~ret0 := g(~x - 1);< 647#gENTRY ~x := #in~x; 651#L12 assume !(0 == ~x); 645#L15 call #t~ret0 := g(~x - 1);< 649#gENTRY ~x := #in~x; 652#L12 assume 0 == ~x;#res := 1; 644#gFINAL assume true; 646#gEXIT >#22#return; 635#L15-1 [2020-10-19 18:40:17,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:40:17,022 INFO L82 PathProgramCache]: Analyzing trace with hash -54633169, now seen corresponding path program 2 times [2020-10-19 18:40:17,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:40:17,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255546975] [2020-10-19 18:40:17,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:40:17,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:17,027 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:17,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:17,031 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:17,033 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:40:17,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:40:17,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1187216231, now seen corresponding path program 2 times [2020-10-19 18:40:17,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:40:17,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699303176] [2020-10-19 18:40:17,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:40:17,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:17,040 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:17,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:17,044 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:17,045 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:40:17,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:40:17,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1917105529, now seen corresponding path program 4 times [2020-10-19 18:40:17,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:40:17,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455552536] [2020-10-19 18:40:17,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:40:17,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:17,055 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:17,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:17,062 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:17,064 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:40:17,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 19.10 06:40:17 BoogieIcfgContainer [2020-10-19 18:40:17,380 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-19 18:40:17,381 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 18:40:17,381 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 18:40:17,381 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 18:40:17,382 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:40:09" (3/4) ... [2020-10-19 18:40:17,385 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2020-10-19 18:40:17,442 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 18:40:17,443 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 18:40:17,445 INFO L168 Benchmark]: Toolchain (without parser) took 8775.33 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 213.9 MB). Free memory was 961.3 MB in the beginning and 923.8 MB in the end (delta: 37.5 MB). Peak memory consumption was 251.4 MB. Max. memory is 11.5 GB. [2020-10-19 18:40:17,446 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:40:17,447 INFO L168 Benchmark]: CACSL2BoogieTranslator took 239.36 ms. Allocated memory is still 1.0 GB. Free memory was 961.3 MB in the beginning and 950.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:40:17,447 INFO L168 Benchmark]: Boogie Procedure Inliner took 120.84 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.8 MB). Free memory was 950.6 MB in the beginning and 1.1 GB in the end (delta: -191.2 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2020-10-19 18:40:17,448 INFO L168 Benchmark]: Boogie Preprocessor took 21.10 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:40:17,449 INFO L168 Benchmark]: RCFGBuilder took 296.20 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 11.5 GB. [2020-10-19 18:40:17,449 INFO L168 Benchmark]: BuchiAutomizer took 8024.83 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 68.2 MB). Free memory was 1.1 GB in the beginning and 923.8 MB in the end (delta: 197.6 MB). Peak memory consumption was 265.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:40:17,450 INFO L168 Benchmark]: Witness Printer took 61.81 ms. Allocated memory is still 1.2 GB. Free memory is still 923.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:40:17,453 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 239.36 ms. Allocated memory is still 1.0 GB. Free memory was 961.3 MB in the beginning and 950.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 120.84 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.8 MB). Free memory was 950.6 MB in the beginning and 1.1 GB in the end (delta: -191.2 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 21.10 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 296.20 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 8024.83 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 68.2 MB). Free memory was 1.1 GB in the beginning and 923.8 MB in the end (delta: 197.6 MB). Peak memory consumption was 265.7 MB. Max. memory is 11.5 GB. * Witness Printer took 61.81 ms. Allocated memory is still 1.2 GB. Free memory is still 923.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 4 terminating modules (2 trivial, 2 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function \old(x) and consists of 5 locations. One deterministic module has affine ranking function -2 * aux-g(x - 1)-aux + 1 and consists of 10 locations. 2 modules have a trivial ranking function, the largest among these consists of 10 locations. The remainder module has 21 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 7.9s and 4 iterations. TraceHistogramMax:4. Analysis of lassos took 6.5s. Construction of modules took 0.2s. Büchi inclusion checks took 0.8s. Highest rank in rank-based complementation 3. Minimization of det autom 0. Minimization of nondet autom 4. Automata minimization 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 19 StatesRemovedByMinimization, 4 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 25 states and ocurred in iteration 2. Nontrivial modules had stage [2, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/2 HoareTripleCheckerStatistics: 46 SDtfs, 70 SDslu, 99 SDs, 0 SdLazy, 234 SolverSat, 48 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT0 conc1 concLT1 SILN0 SILU0 SILI0 SILT0 lasso1 LassoPreprocessingBenchmarks: Lassos: inital14 mio100 ax100 hnf93 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq194 hnf92 smp100 dnf139 smp100 tf104 neg96 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 74ms VariablesStem: 1 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 2 SupportingInvariants: 4 MotzkinApplications: 16 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 13 LassoNonterminationAnalysisSatUnbounded: 2 LassoNonterminationAnalysisUnsat: 2 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 3.5s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 15]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {} State at position 1 is {org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3f2135ae=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@2612d0a8=1, \result=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@33452472=0, \old(x)=1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@55541157=0, x=0, x=1, NULL=0} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 15]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L19] int x = __VERIFIER_nondet_int(); [L20] COND FALSE !(x < 0) [L21] CALL g(x) [L12] COND FALSE !(x == 0) [L15] CALL g(x - 1) [L12] COND TRUE x == 0 [L13] return 1; [L15] RET g(x - 1) Loop: [L15] CALL g(g(x - 1) + 1) [L12] COND FALSE !(x == 0) [L15] CALL g(x - 1) [L12] COND FALSE !(x == 0) [L15] CALL g(x - 1) [L12] COND TRUE x == 0 [L13] return 1; [L15] RET g(x - 1) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...