./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 ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/termination-crafted/NestedRecursion_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 422ea435de955cc6e58e578076c5ef733a2456157ad413df035d109cb231427a --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 21:55:00,356 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 21:55:00,357 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 21:55:00,401 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 21:55:00,401 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 21:55:00,402 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 21:55:00,403 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 21:55:00,404 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 21:55:00,405 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 21:55:00,405 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 21:55:00,406 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 21:55:00,407 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 21:55:00,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 21:55:00,408 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 21:55:00,408 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 21:55:00,409 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 21:55:00,410 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 21:55:00,410 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 21:55:00,411 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 21:55:00,413 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 21:55:00,414 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 21:55:00,414 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 21:55:00,415 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 21:55:00,416 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 21:55:00,417 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 21:55:00,418 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 21:55:00,418 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 21:55:00,418 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 21:55:00,419 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 21:55:00,419 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 21:55:00,420 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 21:55:00,420 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 21:55:00,421 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 21:55:00,435 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 21:55:00,436 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 21:55:00,436 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 21:55:00,437 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 21:55:00,437 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 21:55:00,437 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 21:55:00,437 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 21:55:00,438 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 21:55:00,439 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-12-21 21:55:00,453 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 21:55:00,457 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 21:55:00,458 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 21:55:00,458 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 21:55:00,459 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 21:55:00,459 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 21:55:00,460 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 21:55:00,460 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-12-21 21:55:00,460 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-12-21 21:55:00,460 INFO L138 SettingsManager]: * Use old map elimination=false [2021-12-21 21:55:00,461 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-12-21 21:55:00,461 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-12-21 21:55:00,461 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-12-21 21:55:00,461 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 21:55:00,461 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 21:55:00,461 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 21:55:00,461 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 21:55:00,461 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-12-21 21:55:00,462 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-12-21 21:55:00,462 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-12-21 21:55:00,462 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 21:55:00,462 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-12-21 21:55:00,462 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 21:55:00,462 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-12-21 21:55:00,462 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 21:55:00,463 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 21:55:00,463 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 21:55:00,464 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 21:55:00,464 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 21:55:00,464 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-12-21 21:55:00,464 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 422ea435de955cc6e58e578076c5ef733a2456157ad413df035d109cb231427a [2021-12-21 21:55:00,674 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 21:55:00,695 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 21:55:00,709 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 21:55:00,709 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 21:55:00,710 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 21:55:00,711 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c [2021-12-21 21:55:00,751 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c4068f7d/ada6ed0a0c614990a4b90c5e43356908/FLAG7b4c69634 [2021-12-21 21:55:01,102 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 21:55:01,102 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c [2021-12-21 21:55:01,106 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c4068f7d/ada6ed0a0c614990a4b90c5e43356908/FLAG7b4c69634 [2021-12-21 21:55:01,114 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c4068f7d/ada6ed0a0c614990a4b90c5e43356908 [2021-12-21 21:55:01,115 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 21:55:01,116 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 21:55:01,117 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 21:55:01,117 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 21:55:01,119 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 21:55:01,119 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:55:01" (1/1) ... [2021-12-21 21:55:01,120 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@eb807b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:01, skipping insertion in model container [2021-12-21 21:55:01,120 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:55:01" (1/1) ... [2021-12-21 21:55:01,124 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 21:55:01,130 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 21:55:01,267 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 21:55:01,269 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 21:55:01,276 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 21:55:01,284 INFO L208 MainTranslator]: Completed translation [2021-12-21 21:55:01,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:01 WrapperNode [2021-12-21 21:55:01,284 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 21:55:01,285 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 21:55:01,285 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 21:55:01,285 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 21:55:01,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:01" (1/1) ... [2021-12-21 21:55:01,293 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:01" (1/1) ... [2021-12-21 21:55:01,301 INFO L137 Inliner]: procedures = 5, calls = 5, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 9 [2021-12-21 21:55:01,301 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 21:55:01,302 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 21:55:01,302 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 21:55:01,302 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 21:55:01,307 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:01" (1/1) ... [2021-12-21 21:55:01,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:01" (1/1) ... [2021-12-21 21:55:01,308 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:01" (1/1) ... [2021-12-21 21:55:01,308 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:01" (1/1) ... [2021-12-21 21:55:01,309 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:01" (1/1) ... [2021-12-21 21:55:01,310 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:01" (1/1) ... [2021-12-21 21:55:01,311 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:01" (1/1) ... [2021-12-21 21:55:01,311 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 21:55:01,312 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 21:55:01,312 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 21:55:01,312 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 21:55:01,313 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:01" (1/1) ... [2021-12-21 21:55:01,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:55:01,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:55:01,336 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 21:55:01,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-12-21 21:55:01,381 INFO L130 BoogieDeclarations]: Found specification of procedure g [2021-12-21 21:55:01,382 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2021-12-21 21:55:01,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 21:55:01,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 21:55:01,413 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 21:55:01,414 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 21:55:01,479 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 21:55:01,484 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 21:55:01,484 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-21 21:55:01,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:55:01 BoogieIcfgContainer [2021-12-21 21:55:01,485 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 21:55:01,486 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-12-21 21:55:01,486 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-12-21 21:55:01,488 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-12-21 21:55:01,488 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-21 21:55:01,488 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 21.12 09:55:01" (1/3) ... [2021-12-21 21:55:01,489 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1480b90c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 21.12 09:55:01, skipping insertion in model container [2021-12-21 21:55:01,490 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-21 21:55:01,490 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:01" (2/3) ... [2021-12-21 21:55:01,490 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1480b90c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 21.12 09:55:01, skipping insertion in model container [2021-12-21 21:55:01,490 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-21 21:55:01,490 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:55:01" (3/3) ... [2021-12-21 21:55:01,491 INFO L388 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_2b.c [2021-12-21 21:55:01,518 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-12-21 21:55:01,519 INFO L360 BuchiCegarLoop]: Hoare is false [2021-12-21 21:55:01,519 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-12-21 21:55:01,519 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-12-21 21:55:01,519 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-12-21 21:55:01,519 INFO L364 BuchiCegarLoop]: Difference is false [2021-12-21 21:55:01,519 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-12-21 21:55:01,519 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-12-21 21:55:01,529 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 21:55:01,547 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-12-21 21:55:01,547 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-21 21:55:01,547 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-21 21:55:01,550 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-12-21 21:55:01,551 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-12-21 21:55:01,551 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-12-21 21:55:01,551 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 21:55:01,553 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-12-21 21:55:01,553 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-21 21:55:01,553 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-21 21:55:01,554 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-12-21 21:55:01,554 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-12-21 21:55:01,558 INFO L791 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 7#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet2#1, main_#t~ret3#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 13#L20true assume !(main_~x~0#1 < 0); 12#L21true call main_#t~ret3#1 := g(main_~x~0#1);< 8#gENTRYtrue [2021-12-21 21:55:01,558 INFO L793 eck$LassoCheckResult]: Loop: 8#gENTRYtrue ~x := #in~x; 9#L12true assume !(0 == ~x); 6#L15true call #t~ret0 := g(~x - 1);< 8#gENTRYtrue [2021-12-21 21:55:01,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 21:55:01,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1202733, now seen corresponding path program 1 times [2021-12-21 21:55:01,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 21:55:01,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676276318] [2021-12-21 21:55:01,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 21:55:01,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 21:55:01,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:55:01,625 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 21:55:01,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:55:01,642 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 21:55:01,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 21:55:01,645 INFO L85 PathProgramCache]: Analyzing trace with hash 29937, now seen corresponding path program 1 times [2021-12-21 21:55:01,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 21:55:01,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371243112] [2021-12-21 21:55:01,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 21:55:01,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 21:55:01,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:55:01,655 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 21:55:01,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:55:01,667 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 21:55:01,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 21:55:01,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1470880581, now seen corresponding path program 1 times [2021-12-21 21:55:01,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 21:55:01,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157333269] [2021-12-21 21:55:01,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 21:55:01,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 21:55:01,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:55:01,680 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 21:55:01,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:55:01,684 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 21:55:01,764 INFO L210 LassoAnalysis]: Preferences: [2021-12-21 21:55:01,765 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-21 21:55:01,765 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-21 21:55:01,765 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-21 21:55:01,765 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-21 21:55:01,765 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:55:01,765 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-21 21:55:01,765 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-21 21:55:01,766 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration1_Loop [2021-12-21 21:55:01,766 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-21 21:55:01,766 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-21 21:55:01,790 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 21:55:01,794 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 21:55:01,796 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 21:55:01,798 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 21:55:01,800 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 21:55:01,857 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-21 21:55:01,858 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-21 21:55:01,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:55:01,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:55:01,861 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 21:55:01,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-12-21 21:55:01,863 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 21:55:01,863 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 21:55:01,889 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-21 21:55:01,890 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_~x=0} Honda state: {g_~x=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-21 21:55:01,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-12-21 21:55:01,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:55:01,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:55:01,912 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 21:55:01,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-12-21 21:55:01,914 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 21:55:01,914 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 21:55:01,936 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-21 21:55:01,936 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret1=0} Honda state: {g_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-21 21:55:01,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-12-21 21:55:01,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:55:01,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:55:01,968 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 21:55:01,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-12-21 21:55:01,971 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 21:55:01,971 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 21:55:01,991 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-21 21:55:01,992 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-21 21:55:02,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-12-21 21:55:02,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:55:02,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:55:02,021 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 21:55:02,042 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 21:55:02,042 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 21:55:02,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-12-21 21:55:02,064 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-21 21:55:02,064 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret0=0} Honda state: {g_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-21 21:55:02,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-12-21 21:55:02,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:55:02,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:55:02,100 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 21:55:02,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-12-21 21:55:02,103 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 21:55:02,103 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 21:55:02,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-12-21 21:55:02,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:55:02,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:55:02,155 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 21:55:02,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-12-21 21:55:02,181 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-21 21:55:02,181 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 21:55:02,215 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-21 21:55:02,215 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#in~x=-4} Honda state: {g_#in~x=-4} Generalized eigenvectors: [{g_#in~x=0}, {g_#in~x=0}, {g_#in~x=-1}] Lambdas: [0, 5, 1] Nus: [0, 0] [2021-12-21 21:55:02,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-12-21 21:55:02,278 INFO L210 LassoAnalysis]: Preferences: [2021-12-21 21:55:02,278 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-21 21:55:02,278 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-21 21:55:02,279 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-21 21:55:02,279 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-21 21:55:02,279 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:55:02,279 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-21 21:55:02,279 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-21 21:55:02,279 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration1_Lasso [2021-12-21 21:55:02,279 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-21 21:55:02,279 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-21 21:55:02,280 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 21:55:02,296 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 21:55:02,298 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 21:55:02,302 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 21:55:02,305 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 21:55:02,307 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 21:55:02,309 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 21:55:02,317 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 21:55:02,318 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 21:55:02,321 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 21:55:02,373 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-21 21:55:02,373 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-21 21:55:02,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:55:02,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:55:02,374 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 21:55:02,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-12-21 21:55:02,395 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 21:55:02,395 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 21:55:02,417 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-21 21:55:02,417 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret1=0} Honda state: {g_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-21 21:55:02,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Ended with exit code 0 [2021-12-21 21:55:02,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:55:02,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:55:02,446 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 21:55:02,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-12-21 21:55:02,449 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 21:55:02,449 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 21:55:02,456 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-21 21:55:02,457 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-21 21:55:02,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-12-21 21:55:02,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:55:02,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:55:02,473 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 21:55:02,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-12-21 21:55:02,475 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 21:55:02,476 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 21:55:02,519 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-21 21:55:02,519 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret0=0} Honda state: {g_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-21 21:55:02,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-12-21 21:55:02,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:55:02,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:55:02,564 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 21:55:02,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-12-21 21:55:02,575 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 21:55:02,575 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 21:55:02,583 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-21 21:55:02,583 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~x~0#1=0} Honda state: {ULTIMATE.start_main_~x~0#1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-21 21:55:02,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-12-21 21:55:02,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:55:02,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:55:02,600 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 21:55:02,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-12-21 21:55:02,625 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 21:55:02,625 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 21:55:02,633 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-21 21:55:02,633 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#res#1=0} Honda state: {ULTIMATE.start_main_#res#1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-21 21:55:02,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-12-21 21:55:02,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:55:02,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:55:02,650 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 21:55:02,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-12-21 21:55:02,652 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 21:55:02,652 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 21:55:02,660 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-21 21:55:02,660 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~ret3#1=0} Honda state: {ULTIMATE.start_main_#t~ret3#1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-21 21:55:02,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-12-21 21:55:02,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:55:02,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:55:02,679 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 21:55:02,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-12-21 21:55:02,692 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 21:55:02,692 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 21:55:02,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Ended with exit code 0 [2021-12-21 21:55:02,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:55:02,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:55:02,719 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 21:55:02,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-12-21 21:55:02,721 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-21 21:55:02,721 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 21:55:02,756 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-21 21:55:02,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-12-21 21:55:02,761 INFO L210 LassoAnalysis]: Preferences: [2021-12-21 21:55:02,761 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-21 21:55:02,761 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-21 21:55:02,762 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-21 21:55:02,762 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-21 21:55:02,762 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:55:02,762 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-21 21:55:02,762 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-21 21:55:02,762 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration1_Lasso [2021-12-21 21:55:02,762 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-21 21:55:02,762 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-21 21:55:02,763 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 21:55:02,766 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 21:55:02,768 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 21:55:02,771 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 21:55:02,773 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 21:55:02,774 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 21:55:02,776 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 21:55:02,777 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 21:55:02,779 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 21:55:02,784 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 21:55:02,823 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-21 21:55:02,825 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-21 21:55:02,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:55:02,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:55:02,827 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 21:55:02,846 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-21 21:55:02,853 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 21:55:02,853 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-21 21:55:02,853 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 21:55:02,853 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 21:55:02,853 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 21:55:02,855 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-21 21:55:02,855 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-21 21:55:02,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-12-21 21:55:02,866 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-21 21:55:02,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Ended with exit code 0 [2021-12-21 21:55:02,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:55:02,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:55:02,883 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 21:55:02,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-12-21 21:55:02,904 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-21 21:55:02,910 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 21:55:02,911 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-21 21:55:02,911 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 21:55:02,911 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 21:55:02,911 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 21:55:02,911 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-21 21:55:02,912 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-21 21:55:02,928 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-21 21:55:02,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-12-21 21:55:02,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:55:02,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:55:02,988 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 21:55:03,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-12-21 21:55:03,005 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-21 21:55:03,012 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 21:55:03,012 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-21 21:55:03,012 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 21:55:03,012 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 21:55:03,012 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 21:55:03,013 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-21 21:55:03,013 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-21 21:55:03,014 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-21 21:55:03,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-12-21 21:55:03,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:55:03,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:55:03,036 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 21:55:03,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-12-21 21:55:03,041 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-21 21:55:03,048 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 21:55:03,048 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-21 21:55:03,048 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 21:55:03,048 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 21:55:03,048 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 21:55:03,049 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-21 21:55:03,049 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-21 21:55:03,063 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-21 21:55:03,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-12-21 21:55:03,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:55:03,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:55:03,080 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 21:55:03,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-12-21 21:55:03,083 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-21 21:55:03,090 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 21:55:03,090 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-21 21:55:03,090 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 21:55:03,091 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 21:55:03,091 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 21:55:03,091 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-21 21:55:03,091 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-21 21:55:03,115 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-21 21:55:03,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Ended with exit code 0 [2021-12-21 21:55:03,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:55:03,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:55:03,134 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 21:55:03,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2021-12-21 21:55:03,136 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-21 21:55:03,142 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 21:55:03,143 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-21 21:55:03,143 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 21:55:03,143 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 21:55:03,143 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 21:55:03,144 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-21 21:55:03,144 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-21 21:55:03,158 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-21 21:55:03,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2021-12-21 21:55:03,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:55:03,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:55:03,176 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 21:55:03,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2021-12-21 21:55:03,184 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-21 21:55:03,192 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 21:55:03,192 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-21 21:55:03,192 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 21:55:03,192 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 21:55:03,192 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 21:55:03,193 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-21 21:55:03,193 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-21 21:55:03,205 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-21 21:55:03,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2021-12-21 21:55:03,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:55:03,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:55:03,223 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 21:55:03,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2021-12-21 21:55:03,227 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-21 21:55:03,233 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 21:55:03,234 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-21 21:55:03,234 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 21:55:03,234 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 21:55:03,234 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 21:55:03,234 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-21 21:55:03,235 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-21 21:55:03,246 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-21 21:55:03,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2021-12-21 21:55:03,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:55:03,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:55:03,263 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 21:55:03,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2021-12-21 21:55:03,265 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-21 21:55:03,271 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 21:55:03,271 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 21:55:03,271 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-12-21 21:55:03,271 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 21:55:03,278 INFO L401 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2021-12-21 21:55:03,279 INFO L402 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2021-12-21 21:55:03,305 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-21 21:55:03,320 INFO L443 ModelExtractionUtils]: Simplification made 10 calls to the SMT solver. [2021-12-21 21:55:03,320 INFO L444 ModelExtractionUtils]: 3 out of 11 variables were initially zero. Simplification set additionally 5 variables to zero. [2021-12-21 21:55:03,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:55:03,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:55:03,325 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 21:55:03,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2021-12-21 21:55:03,327 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-21 21:55:03,361 INFO L438 nArgumentSynthesizer]: Removed 3 redundant supporting invariants from a total of 4. [2021-12-21 21:55:03,361 INFO L513 LassoAnalysis]: Proved termination. [2021-12-21 21:55:03,362 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(g_#in~x) = 1*g_#in~x Supporting invariants [1*g_#in~x >= 0] [2021-12-21 21:55:03,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2021-12-21 21:55:03,385 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2021-12-21 21:55:03,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 21:55:03,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 21:55:03,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 21:55:03,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 21:55:03,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 21:55:03,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 21:55:03,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 21:55:03,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 21:55:03,498 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2021-12-21 21:55:03,499 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 21:55:03,590 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3). Second operand has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 36 states and 43 transitions. Complement of second has 13 states. [2021-12-21 21:55:03,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2021-12-21 21:55:03,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 21:55:03,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2021-12-21 21:55:03,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2021-12-21 21:55:03,598 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 4 letters. Loop has 3 letters. [2021-12-21 21:55:03,598 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 21:55:03,598 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 7 letters. Loop has 3 letters. [2021-12-21 21:55:03,599 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 21:55:03,599 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 4 letters. Loop has 6 letters. [2021-12-21 21:55:03,599 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 21:55:03,599 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 36 states and 43 transitions. [2021-12-21 21:55:03,601 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-12-21 21:55:03,604 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 36 states to 20 states and 26 transitions. [2021-12-21 21:55:03,605 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 14 [2021-12-21 21:55:03,605 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 15 [2021-12-21 21:55:03,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 26 transitions. [2021-12-21 21:55:03,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-21 21:55:03,606 INFO L681 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-12-21 21:55:03,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states and 26 transitions. [2021-12-21 21:55:03,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-12-21 21:55:03,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-21 21:55:03,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-12-21 21:55:03,623 INFO L704 BuchiCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-12-21 21:55:03,623 INFO L587 BuchiCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-12-21 21:55:03,623 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-12-21 21:55:03,624 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 18 states and 22 transitions. [2021-12-21 21:55:03,624 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-12-21 21:55:03,625 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-21 21:55:03,625 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-21 21:55:03,625 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 21:55:03,625 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2021-12-21 21:55:03,626 INFO L791 eck$LassoCheckResult]: Stem: 119#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 120#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet2#1, main_#t~ret3#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 130#L20 assume !(main_~x~0#1 < 0); 127#L21 call main_#t~ret3#1 := g(main_~x~0#1);< 129#gENTRY ~x := #in~x; 131#L12 assume !(0 == ~x); 122#L15 call #t~ret0 := g(~x - 1);< 128#gENTRY ~x := #in~x; 132#L12 assume 0 == ~x;#res := 1; 121#gFINAL assume true; 123#gEXIT >#23#return; 125#L15-1 [2021-12-21 21:55:03,626 INFO L793 eck$LassoCheckResult]: Loop: 125#L15-1 call #t~ret1 := g(1 + #t~ret0);< 126#gENTRY ~x := #in~x; 136#L12 assume !(0 == ~x); 124#L15 call #t~ret0 := g(~x - 1);< 126#gENTRY ~x := #in~x; 136#L12 assume 0 == ~x;#res := 1; 134#gFINAL assume true; 135#gEXIT >#23#return; 125#L15-1 [2021-12-21 21:55:03,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 21:55:03,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1676493545, now seen corresponding path program 1 times [2021-12-21 21:55:03,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 21:55:03,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382412525] [2021-12-21 21:55:03,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 21:55:03,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 21:55:03,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:55:03,633 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 21:55:03,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:55:03,638 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 21:55:03,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 21:55:03,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1500125133, now seen corresponding path program 1 times [2021-12-21 21:55:03,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 21:55:03,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804945910] [2021-12-21 21:55:03,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 21:55:03,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 21:55:03,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:55:03,643 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 21:55:03,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:55:03,646 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 21:55:03,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 21:55:03,646 INFO L85 PathProgramCache]: Analyzing trace with hash 122773219, now seen corresponding path program 1 times [2021-12-21 21:55:03,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 21:55:03,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378761109] [2021-12-21 21:55:03,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 21:55:03,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 21:55:03,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 21:55:03,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 21:55:03,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 21:55:03,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 21:55:03,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 21:55:03,713 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 21:55:03,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 21:55:03,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378761109] [2021-12-21 21:55:03,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378761109] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 21:55:03,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156447733] [2021-12-21 21:55:03,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 21:55:03,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 21:55:03,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:55:03,715 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 21:55:03,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-21 21:55:03,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 21:55:03,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 21:55:03,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 21:55:03,790 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 21:55:03,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 21:55:03,861 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 21:55:03,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156447733] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 21:55:03,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 21:55:03,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2021-12-21 21:55:03,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793098285] [2021-12-21 21:55:03,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 21:55:03,941 INFO L210 LassoAnalysis]: Preferences: [2021-12-21 21:55:03,942 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-21 21:55:03,942 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-21 21:55:03,942 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-21 21:55:03,942 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-21 21:55:03,942 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:55:03,942 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-21 21:55:03,942 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-21 21:55:03,942 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration2_Loop [2021-12-21 21:55:03,942 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-21 21:55:03,942 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-21 21:55:03,943 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 21:55:03,949 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 21:55:03,951 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 21:55:03,977 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-21 21:55:03,977 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-21 21:55:03,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:55:03,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:55:03,979 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 21:55:03,992 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 21:55:03,992 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 21:55:04,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-12-21 21:55:04,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2021-12-21 21:55:04,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:55:04,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:55:04,027 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 21:55:04,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-12-21 21:55:04,029 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-21 21:55:04,029 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 21:55:05,413 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-21 21:55:05,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2021-12-21 21:55:05,419 INFO L210 LassoAnalysis]: Preferences: [2021-12-21 21:55:05,419 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-21 21:55:05,419 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-21 21:55:05,419 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-21 21:55:05,419 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-21 21:55:05,419 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:55:05,419 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-21 21:55:05,419 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-21 21:55:05,419 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration2_Loop [2021-12-21 21:55:05,419 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-21 21:55:05,420 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-21 21:55:05,420 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 21:55:05,426 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 21:55:05,428 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 21:55:05,454 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-21 21:55:05,454 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-21 21:55:05,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:55:05,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:55:05,456 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 21:55:05,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2021-12-21 21:55:05,458 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-21 21:55:05,464 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 21:55:05,464 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-21 21:55:05,464 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 21:55:05,464 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 21:55:05,464 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 21:55:05,465 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-21 21:55:05,465 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-21 21:55:05,480 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-21 21:55:05,482 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-21 21:55:05,482 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-12-21 21:55:05,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:55:05,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:55:05,500 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 21:55:05,501 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-21 21:55:05,501 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-21 21:55:05,501 INFO L513 LassoAnalysis]: Proved termination. [2021-12-21 21:55:05,501 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(g_#t~ret0) = -2*g_#t~ret0 + 1 Supporting invariants [] [2021-12-21 21:55:05,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2021-12-21 21:55:05,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Ended with exit code 0 [2021-12-21 21:55:05,517 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-21 21:55:05,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 21:55:05,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 21:55:05,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 21:55:05,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 21:55:05,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2021-12-21 21:55:05,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 21:55:05,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-21 21:55:05,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 21:55:05,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 21:55:05,733 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 [2021-12-21 21:55:05,734 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 18 states and 22 transitions. cyclomatic complexity: 6 Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 21:55:05,905 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 18 states and 22 transitions. cyclomatic complexity: 6. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Result 83 states and 121 transitions. Complement of second has 31 states. [2021-12-21 21:55:05,905 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 [2021-12-21 21:55:05,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 21:55:05,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 37 transitions. [2021-12-21 21:55:05,907 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 37 transitions. Stem has 11 letters. Loop has 8 letters. [2021-12-21 21:55:05,908 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 21:55:05,908 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 37 transitions. Stem has 19 letters. Loop has 8 letters. [2021-12-21 21:55:05,908 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 21:55:05,908 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 37 transitions. Stem has 11 letters. Loop has 16 letters. [2021-12-21 21:55:05,908 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 21:55:05,908 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 83 states and 121 transitions. [2021-12-21 21:55:05,912 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2021-12-21 21:55:05,914 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 83 states to 59 states and 82 transitions. [2021-12-21 21:55:05,914 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 45 [2021-12-21 21:55:05,915 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 46 [2021-12-21 21:55:05,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 82 transitions. [2021-12-21 21:55:05,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-21 21:55:05,915 INFO L681 BuchiCegarLoop]: Abstraction has 59 states and 82 transitions. [2021-12-21 21:55:05,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states and 82 transitions. [2021-12-21 21:55:05,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2021-12-21 21:55:05,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 33 states have internal predecessors, (36), 15 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (18), 11 states have call predecessors, (18), 13 states have call successors, (18) [2021-12-21 21:55:05,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 72 transitions. [2021-12-21 21:55:05,921 INFO L704 BuchiCegarLoop]: Abstraction has 53 states and 72 transitions. [2021-12-21 21:55:05,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 21:55:05,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 21:55:05,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-21 21:55:05,924 INFO L87 Difference]: Start difference. First operand 53 states and 72 transitions. Second operand has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 21:55:05,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 21:55:05,970 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2021-12-21 21:55:05,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 21:55:05,970 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 40 states and 45 transitions. [2021-12-21 21:55:05,971 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-12-21 21:55:05,972 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 40 states to 31 states and 35 transitions. [2021-12-21 21:55:05,972 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 26 [2021-12-21 21:55:05,972 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 26 [2021-12-21 21:55:05,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 35 transitions. [2021-12-21 21:55:05,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-21 21:55:05,973 INFO L681 BuchiCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-12-21 21:55:05,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states and 35 transitions. [2021-12-21 21:55:05,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2021-12-21 21:55:05,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 7 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 21:55:05,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-12-21 21:55:05,974 INFO L704 BuchiCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-12-21 21:55:05,975 INFO L587 BuchiCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-12-21 21:55:05,975 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-12-21 21:55:05,975 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 26 states and 28 transitions. [2021-12-21 21:55:05,975 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-12-21 21:55:05,975 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-21 21:55:05,976 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-21 21:55:05,976 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 21:55:05,976 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-12-21 21:55:05,976 INFO L791 eck$LassoCheckResult]: Stem: 565#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 566#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet2#1, main_#t~ret3#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 576#L20 assume !(main_~x~0#1 < 0); 574#L21 call main_#t~ret3#1 := g(main_~x~0#1);< 575#gENTRY ~x := #in~x; 578#L12 assume !(0 == ~x); 568#L15 call #t~ret0 := g(~x - 1);< 573#gENTRY ~x := #in~x; 579#L12 assume 0 == ~x;#res := 1; 567#gFINAL assume true; 569#gEXIT >#23#return; 571#L15-1 call #t~ret1 := g(1 + #t~ret0);< 581#gENTRY ~x := #in~x; 588#L12 assume !(0 == ~x); 570#L15 call #t~ret0 := g(~x - 1);< 572#gENTRY ~x := #in~x; 577#L12 assume !(0 == ~x); 580#L15 [2021-12-21 21:55:05,976 INFO L793 eck$LassoCheckResult]: Loop: 580#L15 call #t~ret0 := g(~x - 1);< 582#gENTRY ~x := #in~x; 584#L12 assume !(0 == ~x); 580#L15 [2021-12-21 21:55:05,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 21:55:05,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1443446059, now seen corresponding path program 2 times [2021-12-21 21:55:05,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 21:55:05,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303132422] [2021-12-21 21:55:05,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 21:55:05,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 21:55:05,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:55:05,982 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 21:55:05,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:55:05,987 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 21:55:05,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 21:55:05,988 INFO L85 PathProgramCache]: Analyzing trace with hash 50937, now seen corresponding path program 2 times [2021-12-21 21:55:05,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 21:55:05,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321202072] [2021-12-21 21:55:05,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 21:55:05,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 21:55:05,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:55:05,991 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 21:55:05,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:55:05,992 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 21:55:05,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 21:55:05,993 INFO L85 PathProgramCache]: Analyzing trace with hash -488954971, now seen corresponding path program 3 times [2021-12-21 21:55:05,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 21:55:05,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688487189] [2021-12-21 21:55:05,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 21:55:05,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 21:55:05,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 21:55:06,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 21:55:06,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 21:55:06,086 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 21:55:06,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 21:55:06,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688487189] [2021-12-21 21:55:06,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688487189] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 21:55:06,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104257999] [2021-12-21 21:55:06,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 21:55:06,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 21:55:06,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:55:06,104 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 21:55:06,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-21 21:55:06,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-21 21:55:06,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 21:55:06,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-21 21:55:06,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 21:55:06,200 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 21:55:06,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 21:55:06,278 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 21:55:06,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104257999] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 21:55:06,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 21:55:06,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2021-12-21 21:55:06,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811373372] [2021-12-21 21:55:06,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 21:55:06,314 INFO L210 LassoAnalysis]: Preferences: [2021-12-21 21:55:06,315 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-21 21:55:06,315 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-21 21:55:06,315 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-21 21:55:06,315 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-21 21:55:06,315 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:55:06,315 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-21 21:55:06,315 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-21 21:55:06,315 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration3_Loop [2021-12-21 21:55:06,315 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-21 21:55:06,316 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-21 21:55:06,316 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 21:55:06,318 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 21:55:06,320 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 21:55:06,325 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 21:55:06,365 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-21 21:55:06,366 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-21 21:55:06,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:55:06,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:55:06,382 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 21:55:06,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2021-12-21 21:55:06,397 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 21:55:06,397 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 21:55:06,419 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-21 21:55:06,420 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret0=0} Honda state: {g_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-21 21:55:06,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Forceful destruction successful, exit code 0 [2021-12-21 21:55:06,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:55:06,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:55:06,476 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 21:55:06,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2021-12-21 21:55:06,528 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 21:55:06,528 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 21:55:06,547 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-21 21:55:06,547 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-21 21:55:06,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Forceful destruction successful, exit code 0 [2021-12-21 21:55:06,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:55:06,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:55:06,565 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 21:55:06,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2021-12-21 21:55:06,568 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 21:55:06,568 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 21:55:06,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Ended with exit code 0 [2021-12-21 21:55:06,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:55:06,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:55:06,596 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 21:55:06,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2021-12-21 21:55:06,598 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-21 21:55:06,598 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 21:55:07,174 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-21 21:55:07,174 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#in~x=-5, g_~x=-7} Honda state: {g_#in~x=-5, g_~x=-7} Generalized eigenvectors: [{g_#in~x=-4, g_~x=-1}, {g_#in~x=3, g_~x=0}, {g_#in~x=-2, g_~x=0}] Lambdas: [1, 0, 0] Nus: [1, 0] [2021-12-21 21:55:07,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Forceful destruction successful, exit code 0 [2021-12-21 21:55:07,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:55:07,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:55:07,192 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 21:55:07,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2021-12-21 21:55:07,195 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 21:55:07,195 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 21:55:07,216 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-21 21:55:07,216 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret1=0} Honda state: {g_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-21 21:55:07,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Forceful destruction successful, exit code 0 [2021-12-21 21:55:07,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 21:55:07,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 21:55:07,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-21 21:55:07,232 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. cyclomatic complexity: 4 Second operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 6 states have internal predecessors, (13), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 21:55:07,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 21:55:07,330 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-12-21 21:55:07,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 21:55:07,331 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 28 states and 29 transitions. [2021-12-21 21:55:07,331 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-12-21 21:55:07,332 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 28 states to 28 states and 29 transitions. [2021-12-21 21:55:07,332 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2021-12-21 21:55:07,332 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 25 [2021-12-21 21:55:07,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 29 transitions. [2021-12-21 21:55:07,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-21 21:55:07,332 INFO L681 BuchiCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-12-21 21:55:07,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states and 29 transitions. [2021-12-21 21:55:07,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2021-12-21 21:55:07,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 5 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 21:55:07,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-12-21 21:55:07,334 INFO L704 BuchiCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-12-21 21:55:07,334 INFO L587 BuchiCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-12-21 21:55:07,334 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-12-21 21:55:07,334 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states and 23 transitions. [2021-12-21 21:55:07,334 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-12-21 21:55:07,334 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-21 21:55:07,334 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-21 21:55:07,335 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 21:55:07,335 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 1, 1, 1, 1] [2021-12-21 21:55:07,335 INFO L791 eck$LassoCheckResult]: Stem: 764#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 765#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet2#1, main_#t~ret3#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 777#L20 assume !(main_~x~0#1 < 0); 773#L21 call main_#t~ret3#1 := g(main_~x~0#1);< 776#gENTRY ~x := #in~x; 780#L12 assume !(0 == ~x); 772#L15 call #t~ret0 := g(~x - 1);< 774#gENTRY ~x := #in~x; 781#L12 assume 0 == ~x;#res := 1; 782#gFINAL assume true; 775#gEXIT >#23#return; 770#L15-1 [2021-12-21 21:55:07,335 INFO L793 eck$LassoCheckResult]: Loop: 770#L15-1 call #t~ret1 := g(1 + #t~ret0);< 778#gENTRY ~x := #in~x; 779#L12 assume !(0 == ~x); 769#L15 call #t~ret0 := g(~x - 1);< 771#gENTRY ~x := #in~x; 784#L12 assume !(0 == ~x); 767#L15 call #t~ret0 := g(~x - 1);< 783#gENTRY ~x := #in~x; 785#L12 assume 0 == ~x;#res := 1; 766#gFINAL assume true; 768#gEXIT >#23#return; 770#L15-1 [2021-12-21 21:55:07,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 21:55:07,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1676493545, now seen corresponding path program 2 times [2021-12-21 21:55:07,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 21:55:07,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295832683] [2021-12-21 21:55:07,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 21:55:07,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 21:55:07,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:55:07,338 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 21:55:07,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:55:07,341 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 21:55:07,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 21:55:07,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1133998729, now seen corresponding path program 2 times [2021-12-21 21:55:07,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 21:55:07,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801949290] [2021-12-21 21:55:07,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 21:55:07,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 21:55:07,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:55:07,345 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 21:55:07,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:55:07,348 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 21:55:07,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 21:55:07,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1734292557, now seen corresponding path program 4 times [2021-12-21 21:55:07,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 21:55:07,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335214024] [2021-12-21 21:55:07,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 21:55:07,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 21:55:07,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:55:07,353 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 21:55:07,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:55:07,358 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 21:55:07,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 21.12 09:55:07 BoogieIcfgContainer [2021-12-21 21:55:07,569 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-12-21 21:55:07,569 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-21 21:55:07,569 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-21 21:55:07,569 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-21 21:55:07,569 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:55:01" (3/4) ... [2021-12-21 21:55:07,571 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2021-12-21 21:55:07,591 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-21 21:55:07,591 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-21 21:55:07,592 INFO L158 Benchmark]: Toolchain (without parser) took 6475.74ms. Allocated memory was 100.7MB in the beginning and 121.6MB in the end (delta: 21.0MB). Free memory was 73.6MB in the beginning and 62.7MB in the end (delta: 11.0MB). Peak memory consumption was 31.6MB. Max. memory is 16.1GB. [2021-12-21 21:55:07,593 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 100.7MB. Free memory is still 60.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 21:55:07,593 INFO L158 Benchmark]: CACSL2BoogieTranslator took 167.81ms. Allocated memory was 100.7MB in the beginning and 121.6MB in the end (delta: 21.0MB). Free memory was 73.4MB in the beginning and 100.0MB in the end (delta: -26.6MB). Peak memory consumption was 11.1MB. Max. memory is 16.1GB. [2021-12-21 21:55:07,593 INFO L158 Benchmark]: Boogie Procedure Inliner took 16.39ms. Allocated memory is still 121.6MB. Free memory was 100.0MB in the beginning and 98.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 21:55:07,594 INFO L158 Benchmark]: Boogie Preprocessor took 9.41ms. Allocated memory is still 121.6MB. Free memory was 98.5MB in the beginning and 98.0MB in the end (delta: 501.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 21:55:07,594 INFO L158 Benchmark]: RCFGBuilder took 172.96ms. Allocated memory is still 121.6MB. Free memory was 97.9MB in the beginning and 89.6MB in the end (delta: 8.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-21 21:55:07,594 INFO L158 Benchmark]: BuchiAutomizer took 6083.07ms. Allocated memory is still 121.6MB. Free memory was 89.6MB in the beginning and 63.7MB in the end (delta: 26.0MB). Peak memory consumption was 26.8MB. Max. memory is 16.1GB. [2021-12-21 21:55:07,594 INFO L158 Benchmark]: Witness Printer took 22.32ms. Allocated memory is still 121.6MB. Free memory was 63.7MB in the beginning and 62.7MB in the end (delta: 990.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 21:55:07,596 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 100.7MB. Free memory is still 60.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 167.81ms. Allocated memory was 100.7MB in the beginning and 121.6MB in the end (delta: 21.0MB). Free memory was 73.4MB in the beginning and 100.0MB in the end (delta: -26.6MB). Peak memory consumption was 11.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 16.39ms. Allocated memory is still 121.6MB. Free memory was 100.0MB in the beginning and 98.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 9.41ms. Allocated memory is still 121.6MB. Free memory was 98.5MB in the beginning and 98.0MB in the end (delta: 501.8kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 172.96ms. Allocated memory is still 121.6MB. Free memory was 97.9MB in the beginning and 89.6MB in the end (delta: 8.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 6083.07ms. Allocated memory is still 121.6MB. Free memory was 89.6MB in the beginning and 63.7MB in the end (delta: 26.0MB). Peak memory consumption was 26.8MB. Max. memory is 16.1GB. * Witness Printer took 22.32ms. Allocated memory is still 121.6MB. Free memory was 63.7MB in the beginning and 62.7MB in the end (delta: 990.5kB). There was no memory consumed. Max. memory is 16.1GB. * 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 11 locations. The remainder module has 22 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 6.0s and 4 iterations. TraceHistogramMax:4. Analysis of lassos took 5.2s. Construction of modules took 0.1s. Büchi inclusion checks took 0.6s. 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 26 states and ocurred in iteration 2. Nontrivial modules had stage [2, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/2 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 69 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 67 mSDsluCounter, 168 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 118 mSDsCounter, 47 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 241 IncrementalHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 47 mSolverCounterUnsat, 50 mSDtfsCounter, 241 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT0 conc1 concLT1 SILN0 SILU0 SILI0 SILT0 lasso1 LassoPreprocessingBenchmarks: Lassos: inital14 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq192 hnf93 smp100 dnf138 smp100 tf103 neg95 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 98ms VariablesStem: 1 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 2 SupportingInvariants: 4 MotzkinApplications: 16 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 13 LassoNonterminationAnalysisSatUnbounded: 2 LassoNonterminationAnalysisUnsat: 2 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 2.7s - 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@5a847b56=0, x=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@4ea73e42=1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@668c4d6=0, \result=0, NULL=0, \old(x)=1, \result=0, x=1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@e8ed4ad=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! [2021-12-21 21:55:07,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-12-21 21:55:07,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-21 21:55:08,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM)