./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive-simple/fibo_5-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 9a8b2e8d 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_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/recursive-simple/fibo_5-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-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 32bit --witnessprinter.graph.data.programhash 66ecdb3150790d7b9fa430121dbc9b6f1f7ee64a ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 08:01:01,327 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 08:01:01,329 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 08:01:01,353 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 08:01:01,354 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 08:01:01,355 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 08:01:01,356 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 08:01:01,358 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 08:01:01,360 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 08:01:01,361 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 08:01:01,362 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 08:01:01,363 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 08:01:01,363 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 08:01:01,364 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 08:01:01,365 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 08:01:01,374 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 08:01:01,376 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 08:01:01,378 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 08:01:01,380 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 08:01:01,383 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 08:01:01,387 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 08:01:01,391 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 08:01:01,392 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 08:01:01,393 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 08:01:01,397 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 08:01:01,400 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 08:01:01,400 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 08:01:01,401 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 08:01:01,401 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 08:01:01,403 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 08:01:01,404 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 08:01:01,404 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 08:01:01,405 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 08:01:01,406 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 08:01:01,407 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 08:01:01,408 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 08:01:01,409 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 08:01:01,409 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 08:01:01,409 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 08:01:01,410 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 08:01:01,412 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 08:01:01,413 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-10-20 08:01:01,465 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 08:01:01,465 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 08:01:01,467 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 08:01:01,467 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 08:01:01,468 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 08:01:01,468 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-20 08:01:01,468 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-20 08:01:01,469 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-20 08:01:01,469 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-20 08:01:01,469 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-20 08:01:01,470 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-20 08:01:01,470 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 08:01:01,471 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 08:01:01,471 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 08:01:01,471 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 08:01:01,471 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 08:01:01,472 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 08:01:01,472 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-20 08:01:01,472 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-20 08:01:01,472 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-20 08:01:01,473 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 08:01:01,473 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 08:01:01,473 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-20 08:01:01,473 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 08:01:01,474 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-20 08:01:01,474 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 08:01:01,474 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 08:01:01,474 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-20 08:01:01,475 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 08:01:01,475 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 08:01:01,475 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 08:01:01,475 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-20 08:01:01,476 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-20 08:01:01,477 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 66ecdb3150790d7b9fa430121dbc9b6f1f7ee64a [2020-10-20 08:01:01,708 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 08:01:01,727 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 08:01:01,731 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 08:01:01,733 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 08:01:01,733 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 08:01:01,734 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_5-1.c [2020-10-20 08:01:01,800 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/407bc48b7/fb94943ad7fd493295250c16413e594a/FLAGb83fd1bb9 [2020-10-20 08:01:02,326 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 08:01:02,327 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_5-1.c [2020-10-20 08:01:02,334 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/407bc48b7/fb94943ad7fd493295250c16413e594a/FLAGb83fd1bb9 [2020-10-20 08:01:02,673 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/407bc48b7/fb94943ad7fd493295250c16413e594a [2020-10-20 08:01:02,677 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 08:01:02,683 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 08:01:02,684 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 08:01:02,685 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 08:01:02,688 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 08:01:02,689 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 08:01:02" (1/1) ... [2020-10-20 08:01:02,692 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@251759a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:01:02, skipping insertion in model container [2020-10-20 08:01:02,693 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 08:01:02" (1/1) ... [2020-10-20 08:01:02,700 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 08:01:02,720 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 08:01:02,891 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 08:01:02,901 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 08:01:02,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 08:01:02,932 INFO L208 MainTranslator]: Completed translation [2020-10-20 08:01:02,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:01:02 WrapperNode [2020-10-20 08:01:02,933 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 08:01:02,934 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 08:01:02,934 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 08:01:02,934 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 08:01:02,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:01:02" (1/1) ... [2020-10-20 08:01:02,948 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:01:02" (1/1) ... [2020-10-20 08:01:02,965 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 08:01:02,966 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 08:01:02,966 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 08:01:02,966 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 08:01:02,975 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:01:02" (1/1) ... [2020-10-20 08:01:02,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:01:02" (1/1) ... [2020-10-20 08:01:02,977 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:01:02" (1/1) ... [2020-10-20 08:01:02,977 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:01:02" (1/1) ... [2020-10-20 08:01:02,981 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:01:02" (1/1) ... [2020-10-20 08:01:02,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:01:02" (1/1) ... [2020-10-20 08:01:02,984 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:01:02" (1/1) ... [2020-10-20 08:01:02,985 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 08:01:02,986 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 08:01:02,986 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 08:01:02,986 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 08:01:02,987 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:01:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:03,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 08:01:03,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 08:01:03,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 08:01:03,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 08:01:03,051 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-10-20 08:01:03,052 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-10-20 08:01:03,248 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 08:01:03,249 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-20 08:01:03,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 08:01:03 BoogieIcfgContainer [2020-10-20 08:01:03,250 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 08:01:03,251 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-20 08:01:03,251 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-20 08:01:03,255 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-20 08:01:03,256 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 08:01:03,256 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 20.10 08:01:02" (1/3) ... [2020-10-20 08:01:03,257 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3c455155 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.10 08:01:03, skipping insertion in model container [2020-10-20 08:01:03,257 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 08:01:03,258 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:01:02" (2/3) ... [2020-10-20 08:01:03,258 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3c455155 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.10 08:01:03, skipping insertion in model container [2020-10-20 08:01:03,258 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 08:01:03,259 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 08:01:03" (3/3) ... [2020-10-20 08:01:03,260 INFO L373 chiAutomizerObserver]: Analyzing ICFG fibo_5-1.c [2020-10-20 08:01:03,339 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-20 08:01:03,342 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-20 08:01:03,342 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-20 08:01:03,342 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 08:01:03,343 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 08:01:03,343 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-20 08:01:03,343 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 08:01:03,343 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-20 08:01:03,368 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states. [2020-10-20 08:01:03,401 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-20 08:01:03,401 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:01:03,402 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:01:03,410 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-20 08:01:03,411 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-20 08:01:03,411 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-20 08:01:03,411 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states. [2020-10-20 08:01:03,414 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-20 08:01:03,414 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:01:03,414 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:01:03,415 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-20 08:01:03,415 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-20 08:01:03,423 INFO L794 eck$LassoCheckResult]: Stem: 13#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 11#L-1true havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 8#L27true call main_#t~ret9 := fibo(main_~x~0);< 16#fiboENTRYtrue [2020-10-20 08:01:03,423 INFO L796 eck$LassoCheckResult]: Loop: 16#fiboENTRYtrue ~n := #in~n; 14#L8true assume !(~n < 1); 18#L10true assume !(1 == ~n); 7#L13true call #t~ret7 := fibo(~n - 1);< 16#fiboENTRYtrue [2020-10-20 08:01:03,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:03,431 INFO L82 PathProgramCache]: Analyzing trace with hash 29885, now seen corresponding path program 1 times [2020-10-20 08:01:03,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:03,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642744287] [2020-10-20 08:01:03,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:03,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:03,547 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:03,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:03,564 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:03,586 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:01:03,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:03,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1512524, now seen corresponding path program 1 times [2020-10-20 08:01:03,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:03,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773339595] [2020-10-20 08:01:03,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:03,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:03,595 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:03,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:03,598 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:03,600 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:01:03,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:03,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1830210312, now seen corresponding path program 1 times [2020-10-20 08:01:03,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:03,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767023608] [2020-10-20 08:01:03,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:03,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:03,621 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:03,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:03,637 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:03,643 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:01:03,764 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:03,765 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:03,766 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:03,766 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:03,766 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:01:03,767 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:03,767 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:03,767 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:03,767 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration1_Loop [2020-10-20 08:01:03,768 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:03,768 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:03,788 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,798 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,802 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,806 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,812 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,892 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:03,893 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:03,906 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:03,906 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:03,917 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:03,917 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:03,941 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:03,942 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:03,945 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:03,946 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:03,974 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:03,975 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:03,978 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:03,978 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:04,015 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:04,015 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:04,018 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:04,019 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:04,048 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:04,048 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:04,081 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:01:04,081 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:04,108 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:01:04,110 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:04,110 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:04,110 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:04,110 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:04,111 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:01:04,111 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:04,111 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:04,111 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:04,112 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration1_Loop [2020-10-20 08:01:04,112 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:04,113 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:04,115 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:04,118 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:04,121 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:04,124 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:04,127 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:04,182 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:04,188 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:04,207 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:04,210 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:04,210 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:04,211 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:04,211 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:04,212 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:04,214 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:04,214 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:04,221 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:04,256 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:04,258 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:04,258 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:04,259 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:04,259 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:04,259 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:04,260 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:04,260 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:04,263 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:04,297 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:04,304 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:04,304 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:04,305 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:04,305 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:04,305 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:04,306 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:04,306 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:04,309 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:04,334 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:04,335 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:04,336 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:04,336 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:04,336 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:04,336 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:04,337 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:04,337 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:04,348 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:04,373 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:04,375 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:04,375 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:04,375 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:04,375 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:04,375 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:04,376 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:04,377 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:04,382 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:01:04,406 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 08:01:04,407 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:04,413 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:01:04,413 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:01:04,413 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:01:04,414 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:04,448 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:01:04,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:04,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:04,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 08:01:04,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:04,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:04,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:04,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:04,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:04,572 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2020-10-20 08:01:04,573 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 19 states. Second operand 4 states. [2020-10-20 08:01:04,742 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 19 states.. Second operand 4 states. Result 49 states and 61 transitions. Complement of second has 12 states. [2020-10-20 08:01:04,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:04,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-20 08:01:04,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2020-10-20 08:01:04,748 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2020-10-20 08:01:04,750 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:04,750 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2020-10-20 08:01:04,751 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:04,751 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2020-10-20 08:01:04,751 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:04,752 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 49 states and 61 transitions. [2020-10-20 08:01:04,758 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-20 08:01:04,765 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 49 states to 25 states and 34 transitions. [2020-10-20 08:01:04,767 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2020-10-20 08:01:04,767 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2020-10-20 08:01:04,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2020-10-20 08:01:04,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:04,768 INFO L691 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2020-10-20 08:01:04,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2020-10-20 08:01:04,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2020-10-20 08:01:04,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-20 08:01:04,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2020-10-20 08:01:04,803 INFO L714 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2020-10-20 08:01:04,803 INFO L594 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2020-10-20 08:01:04,803 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-20 08:01:04,803 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2020-10-20 08:01:04,804 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-20 08:01:04,805 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:01:04,805 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:01:04,806 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:04,806 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:04,807 INFO L794 eck$LassoCheckResult]: Stem: 132#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 130#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 128#L27 call main_#t~ret9 := fibo(main_~x~0);< 138#fiboENTRY ~n := #in~n; 136#L8 assume !(~n < 1); 137#L10 assume !(1 == ~n); 125#L13 call #t~ret7 := fibo(~n - 1);< 131#fiboENTRY ~n := #in~n; 133#L8 assume ~n < 1;#res := 0; 134#fiboFINAL assume true; 124#fiboEXIT >#35#return; 126#L13-1 [2020-10-20 08:01:04,807 INFO L796 eck$LassoCheckResult]: Loop: 126#L13-1 call #t~ret8 := fibo(~n - 2);< 129#fiboENTRY ~n := #in~n; 143#L8 assume !(~n < 1); 142#L10 assume !(1 == ~n); 127#L13 call #t~ret7 := fibo(~n - 1);< 129#fiboENTRY ~n := #in~n; 143#L8 assume ~n < 1;#res := 0; 140#fiboFINAL assume true; 141#fiboEXIT >#35#return; 126#L13-1 [2020-10-20 08:01:04,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:04,807 INFO L82 PathProgramCache]: Analyzing trace with hash 523436175, now seen corresponding path program 1 times [2020-10-20 08:01:04,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:04,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102464570] [2020-10-20 08:01:04,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:04,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:04,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-20 08:01:04,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:04,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 08:01:04,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102464570] [2020-10-20 08:01:04,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 08:01:04,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 08:01:04,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224656747] [2020-10-20 08:01:04,921 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:01:04,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:04,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1950983701, now seen corresponding path program 1 times [2020-10-20 08:01:04,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:04,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831540447] [2020-10-20 08:01:04,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:04,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:04,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-20 08:01:04,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:04,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 08:01:04,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831540447] [2020-10-20 08:01:04,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 08:01:04,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 08:01:04,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283949826] [2020-10-20 08:01:04,965 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-20 08:01:04,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:01:04,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 08:01:04,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-20 08:01:04,970 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. cyclomatic complexity: 8 Second operand 6 states. [2020-10-20 08:01:05,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:01:05,047 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2020-10-20 08:01:05,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 08:01:05,048 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2020-10-20 08:01:05,050 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-20 08:01:05,051 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2020-10-20 08:01:05,052 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2020-10-20 08:01:05,052 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2020-10-20 08:01:05,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2020-10-20 08:01:05,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:05,053 INFO L691 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-10-20 08:01:05,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2020-10-20 08:01:05,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-20 08:01:05,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-20 08:01:05,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2020-10-20 08:01:05,058 INFO L714 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-10-20 08:01:05,059 INFO L594 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-10-20 08:01:05,059 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-20 08:01:05,059 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2020-10-20 08:01:05,060 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-20 08:01:05,061 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:01:05,061 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:01:05,062 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:05,062 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2020-10-20 08:01:05,063 INFO L794 eck$LassoCheckResult]: Stem: 205#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 200#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 201#L27 call main_#t~ret9 := fibo(main_~x~0);< 208#fiboENTRY ~n := #in~n; 211#L8 assume !(~n < 1); 212#L10 assume !(1 == ~n); 198#L13 call #t~ret7 := fibo(~n - 1);< 204#fiboENTRY ~n := #in~n; 209#L8 assume !(~n < 1); 210#L10 assume 1 == ~n;#res := 1; 213#fiboFINAL assume true; 197#fiboEXIT >#35#return; 199#L13-1 [2020-10-20 08:01:05,063 INFO L796 eck$LassoCheckResult]: Loop: 199#L13-1 call #t~ret8 := fibo(~n - 2);< 203#fiboENTRY ~n := #in~n; 218#L8 assume !(~n < 1); 217#L10 assume !(1 == ~n); 202#L13 call #t~ret7 := fibo(~n - 1);< 203#fiboENTRY ~n := #in~n; 218#L8 assume !(~n < 1); 217#L10 assume !(1 == ~n); 202#L13 call #t~ret7 := fibo(~n - 1);< 203#fiboENTRY ~n := #in~n; 218#L8 assume !(~n < 1); 217#L10 assume 1 == ~n;#res := 1; 206#fiboFINAL assume true; 207#fiboEXIT >#35#return; 199#L13-1 call #t~ret8 := fibo(~n - 2);< 203#fiboENTRY ~n := #in~n; 218#L8 assume ~n < 1;#res := 0; 219#fiboFINAL assume true; 216#fiboEXIT >#37#return; 214#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 215#fiboFINAL assume true; 220#fiboEXIT >#35#return; 199#L13-1 [2020-10-20 08:01:05,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:05,070 INFO L82 PathProgramCache]: Analyzing trace with hash -953322862, now seen corresponding path program 1 times [2020-10-20 08:01:05,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:05,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390825732] [2020-10-20 08:01:05,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:05,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:05,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-20 08:01:05,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:05,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:05,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390825732] [2020-10-20 08:01:05,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95751464] [2020-10-20 08:01:05,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:01:05,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:05,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 08:01:05,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:05,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:05,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:01:05,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-20 08:01:05,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950780028] [2020-10-20 08:01:05,263 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:01:05,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:05,264 INFO L82 PathProgramCache]: Analyzing trace with hash -2000232554, now seen corresponding path program 1 times [2020-10-20 08:01:05,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:05,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010395699] [2020-10-20 08:01:05,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:05,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:05,289 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:05,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:05,306 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:05,310 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:01:05,554 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:05,554 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:05,554 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:05,554 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:05,554 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:01:05,555 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:05,555 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:05,555 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:05,555 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration3_Loop [2020-10-20 08:01:05,555 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:05,555 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:05,557 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:05,560 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:05,563 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:05,565 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:05,614 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:05,614 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:05,618 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:05,618 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:05,623 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:05,623 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=1} Honda state: {fibo_#t~ret7=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:05,670 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:05,670 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:05,674 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:05,674 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:05,720 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:05,720 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:05,725 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:05,725 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:05,774 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:05,774 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:05,835 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:01:05,835 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:06,686 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:01:06,689 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:06,689 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:06,689 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:06,689 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:06,689 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:01:06,689 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:06,689 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:06,689 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:06,690 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration3_Loop [2020-10-20 08:01:06,690 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:06,690 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:06,691 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:06,694 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:06,696 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:06,704 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:06,742 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:06,742 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:06,750 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:06,752 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:06,752 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:06,752 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:06,752 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:06,752 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:06,753 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:06,753 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:06,755 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:06,782 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:06,784 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:06,784 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:06,784 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:06,785 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:06,785 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:06,785 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:06,785 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:06,787 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:06,810 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:06,812 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:06,812 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:06,812 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:06,812 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:06,812 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:06,823 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:06,823 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:06,833 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:01:06,845 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 08:01:06,845 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:06,862 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:01:06,862 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:01:06,862 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:01:06,862 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:06,882 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:01:06,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:06,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:06,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 08:01:06,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:07,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:07,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-20 08:01:07,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:07,168 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-20 08:01:07,169 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2020-10-20 08:01:07,169 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8 Second operand 9 states. [2020-10-20 08:01:07,492 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8. Second operand 9 states. Result 159 states and 215 transitions. Complement of second has 48 states. [2020-10-20 08:01:07,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:07,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-20 08:01:07,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 41 transitions. [2020-10-20 08:01:07,494 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 12 letters. Loop has 22 letters. [2020-10-20 08:01:07,495 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:07,495 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 34 letters. Loop has 22 letters. [2020-10-20 08:01:07,496 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:07,496 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 12 letters. Loop has 44 letters. [2020-10-20 08:01:07,498 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:07,498 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 159 states and 215 transitions. [2020-10-20 08:01:07,507 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2020-10-20 08:01:07,514 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 159 states to 128 states and 180 transitions. [2020-10-20 08:01:07,515 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 74 [2020-10-20 08:01:07,515 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 79 [2020-10-20 08:01:07,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 128 states and 180 transitions. [2020-10-20 08:01:07,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:07,516 INFO L691 BuchiCegarLoop]: Abstraction has 128 states and 180 transitions. [2020-10-20 08:01:07,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states and 180 transitions. [2020-10-20 08:01:07,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 106. [2020-10-20 08:01:07,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-20 08:01:07,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 140 transitions. [2020-10-20 08:01:07,541 INFO L714 BuchiCegarLoop]: Abstraction has 106 states and 140 transitions. [2020-10-20 08:01:07,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:01:07,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 08:01:07,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-20 08:01:07,542 INFO L87 Difference]: Start difference. First operand 106 states and 140 transitions. Second operand 8 states. [2020-10-20 08:01:07,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:01:07,642 INFO L93 Difference]: Finished difference Result 125 states and 167 transitions. [2020-10-20 08:01:07,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 08:01:07,643 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 125 states and 167 transitions. [2020-10-20 08:01:07,648 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2020-10-20 08:01:07,652 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 125 states to 122 states and 164 transitions. [2020-10-20 08:01:07,652 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2020-10-20 08:01:07,653 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2020-10-20 08:01:07,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 164 transitions. [2020-10-20 08:01:07,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:07,654 INFO L691 BuchiCegarLoop]: Abstraction has 122 states and 164 transitions. [2020-10-20 08:01:07,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states and 164 transitions. [2020-10-20 08:01:07,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 106. [2020-10-20 08:01:07,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-20 08:01:07,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 139 transitions. [2020-10-20 08:01:07,677 INFO L714 BuchiCegarLoop]: Abstraction has 106 states and 139 transitions. [2020-10-20 08:01:07,677 INFO L594 BuchiCegarLoop]: Abstraction has 106 states and 139 transitions. [2020-10-20 08:01:07,677 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-10-20 08:01:07,677 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 106 states and 139 transitions. [2020-10-20 08:01:07,680 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2020-10-20 08:01:07,680 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:01:07,680 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:01:07,681 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:07,681 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:07,681 INFO L794 eck$LassoCheckResult]: Stem: 864#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 859#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 842#L27 call main_#t~ret9 := fibo(main_~x~0);< 873#fiboENTRY ~n := #in~n; 910#L8 assume !(~n < 1); 882#L10 assume !(1 == ~n); 862#L13 call #t~ret7 := fibo(~n - 1);< 863#fiboENTRY ~n := #in~n; 867#L8 assume !(~n < 1); 869#L10 assume !(1 == ~n); 868#L13 call #t~ret7 := fibo(~n - 1);< 863#fiboENTRY ~n := #in~n; 867#L8 assume !(~n < 1); 869#L10 assume !(1 == ~n); 868#L13 call #t~ret7 := fibo(~n - 1);< 863#fiboENTRY ~n := #in~n; 879#L8 assume !(~n < 1); 909#L10 assume 1 == ~n;#res := 1; 908#fiboFINAL assume true; 907#fiboEXIT >#35#return; 845#L13-1 call #t~ret8 := fibo(~n - 2);< 905#fiboENTRY ~n := #in~n; 912#L8 assume ~n < 1;#res := 0; 945#fiboFINAL assume true; 944#fiboEXIT >#37#return; 941#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 940#fiboFINAL assume true; 938#fiboEXIT >#35#return; 861#L13-1 [2020-10-20 08:01:07,682 INFO L796 eck$LassoCheckResult]: Loop: 861#L13-1 call #t~ret8 := fibo(~n - 2);< 843#fiboENTRY ~n := #in~n; 933#L8 assume !(~n < 1); 880#L10 assume !(1 == ~n); 860#L13 call #t~ret7 := fibo(~n - 1);< 843#fiboENTRY ~n := #in~n; 933#L8 assume !(~n < 1); 880#L10 assume 1 == ~n;#res := 1; 881#fiboFINAL assume true; 935#fiboEXIT >#35#return; 861#L13-1 [2020-10-20 08:01:07,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:07,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1335554545, now seen corresponding path program 1 times [2020-10-20 08:01:07,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:07,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991402053] [2020-10-20 08:01:07,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:07,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:07,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-20 08:01:07,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:07,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:07,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:07,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:01:07,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:07,778 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-20 08:01:07,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991402053] [2020-10-20 08:01:07,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302489989] [2020-10-20 08:01:07,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:01:07,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:07,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 08:01:07,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:07,854 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-20 08:01:07,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:01:07,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-20 08:01:07,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279049926] [2020-10-20 08:01:07,855 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:01:07,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:07,855 INFO L82 PathProgramCache]: Analyzing trace with hash 350977484, now seen corresponding path program 1 times [2020-10-20 08:01:07,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:07,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283021242] [2020-10-20 08:01:07,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:07,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:07,860 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:07,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:07,863 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:07,865 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:01:07,973 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:07,974 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:07,974 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:07,974 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:07,974 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:01:07,974 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:07,974 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:07,974 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:07,974 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration4_Loop [2020-10-20 08:01:07,974 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:07,974 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:07,975 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:07,979 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:07,985 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:07,988 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:08,027 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:08,027 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:08,029 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:08,029 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:08,032 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:08,032 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:08,053 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:08,053 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:08,077 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:01:08,077 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:09,121 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:01:09,123 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:09,123 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:09,123 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:09,123 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:09,123 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:01:09,124 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:09,124 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:09,124 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:09,124 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration4_Loop [2020-10-20 08:01:09,124 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:09,124 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:09,125 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:09,129 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:09,140 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:09,150 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:09,192 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:09,192 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:09,204 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:09,205 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:09,205 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:09,206 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:09,206 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:09,206 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:09,207 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:09,207 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:09,209 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:09,252 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:09,254 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:09,254 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:09,254 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:09,254 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:09,254 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:09,258 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:09,258 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:09,268 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:01:09,274 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 08:01:09,274 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:09,285 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:01:09,286 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:01:09,286 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:01:09,286 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:09,317 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:01:09,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:09,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:09,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 08:01:09,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:09,396 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:09,402 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:09,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:09,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:01:09,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:09,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:09,511 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2020-10-20 08:01:09,511 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38 Second operand 8 states. [2020-10-20 08:01:09,737 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38. Second operand 8 states. Result 195 states and 261 transitions. Complement of second has 33 states. [2020-10-20 08:01:09,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:09,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-20 08:01:09,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2020-10-20 08:01:09,739 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 28 letters. Loop has 10 letters. [2020-10-20 08:01:09,739 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:09,739 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:09,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:09,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:09,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 08:01:09,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:09,806 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:09,809 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:09,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:09,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:01:09,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:09,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:09,889 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 6 loop predicates [2020-10-20 08:01:09,889 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38 Second operand 8 states. [2020-10-20 08:01:10,082 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38. Second operand 8 states. Result 292 states and 393 transitions. Complement of second has 25 states. [2020-10-20 08:01:10,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:10,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-20 08:01:10,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 24 transitions. [2020-10-20 08:01:10,085 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 28 letters. Loop has 10 letters. [2020-10-20 08:01:10,085 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:10,086 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:10,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:10,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:10,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 08:01:10,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:10,174 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:10,178 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:10,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:10,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:01:10,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:10,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:10,256 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2020-10-20 08:01:10,257 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38 Second operand 8 states. [2020-10-20 08:01:10,497 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38. Second operand 8 states. Result 810 states and 1071 transitions. Complement of second has 130 states. [2020-10-20 08:01:10,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:10,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-20 08:01:10,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 42 transitions. [2020-10-20 08:01:10,499 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 28 letters. Loop has 10 letters. [2020-10-20 08:01:10,501 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:10,501 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 38 letters. Loop has 10 letters. [2020-10-20 08:01:10,502 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:10,502 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 28 letters. Loop has 20 letters. [2020-10-20 08:01:10,504 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:10,504 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 810 states and 1071 transitions. [2020-10-20 08:01:10,521 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2020-10-20 08:01:10,535 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 810 states to 419 states and 599 transitions. [2020-10-20 08:01:10,536 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 159 [2020-10-20 08:01:10,537 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 183 [2020-10-20 08:01:10,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 419 states and 599 transitions. [2020-10-20 08:01:10,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:10,538 INFO L691 BuchiCegarLoop]: Abstraction has 419 states and 599 transitions. [2020-10-20 08:01:10,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states and 599 transitions. [2020-10-20 08:01:10,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 332. [2020-10-20 08:01:10,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-10-20 08:01:10,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 449 transitions. [2020-10-20 08:01:10,580 INFO L714 BuchiCegarLoop]: Abstraction has 332 states and 449 transitions. [2020-10-20 08:01:10,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:01:10,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-20 08:01:10,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-20 08:01:10,581 INFO L87 Difference]: Start difference. First operand 332 states and 449 transitions. Second operand 11 states. [2020-10-20 08:01:10,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:01:10,799 INFO L93 Difference]: Finished difference Result 504 states and 746 transitions. [2020-10-20 08:01:10,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 08:01:10,799 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 504 states and 746 transitions. [2020-10-20 08:01:10,809 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:01:10,821 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 504 states to 502 states and 743 transitions. [2020-10-20 08:01:10,821 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 226 [2020-10-20 08:01:10,822 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 226 [2020-10-20 08:01:10,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 502 states and 743 transitions. [2020-10-20 08:01:10,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:10,822 INFO L691 BuchiCegarLoop]: Abstraction has 502 states and 743 transitions. [2020-10-20 08:01:10,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states and 743 transitions. [2020-10-20 08:01:10,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 454. [2020-10-20 08:01:10,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 454 states. [2020-10-20 08:01:10,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 675 transitions. [2020-10-20 08:01:10,855 INFO L714 BuchiCegarLoop]: Abstraction has 454 states and 675 transitions. [2020-10-20 08:01:10,855 INFO L594 BuchiCegarLoop]: Abstraction has 454 states and 675 transitions. [2020-10-20 08:01:10,855 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-10-20 08:01:10,856 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 454 states and 675 transitions. [2020-10-20 08:01:10,860 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:01:10,860 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:01:10,860 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:01:10,861 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:10,861 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-20 08:01:10,861 INFO L794 eck$LassoCheckResult]: Stem: 3814#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 3797#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 3798#L27 call main_#t~ret9 := fibo(main_~x~0);< 3819#fiboENTRY ~n := #in~n; 3861#L8 assume !(~n < 1); 3860#L10 assume !(1 == ~n); 3856#L13 call #t~ret7 := fibo(~n - 1);< 3858#fiboENTRY ~n := #in~n; 3859#L8 assume !(~n < 1); 3855#L10 assume !(1 == ~n); 3841#L13 call #t~ret7 := fibo(~n - 1);< 3852#fiboENTRY ~n := #in~n; 3853#L8 assume !(~n < 1); 3857#L10 assume !(1 == ~n); 3840#L13 call #t~ret7 := fibo(~n - 1);< 3852#fiboENTRY ~n := #in~n; 3854#L8 assume !(~n < 1); 3839#L10 assume 1 == ~n;#res := 1; 3842#fiboFINAL assume true; 3899#fiboEXIT >#35#return; 3895#L13-1 call #t~ret8 := fibo(~n - 2);< 3897#fiboENTRY ~n := #in~n; 3924#L8 assume !(~n < 1); 3914#L10 assume !(1 == ~n); 3915#L13 call #t~ret7 := fibo(~n - 1);< 3954#fiboENTRY ~n := #in~n; 3998#L8 assume !(~n < 1); 3988#L10 assume !(1 == ~n); 3989#L13 call #t~ret7 := fibo(~n - 1);< 4038#fiboENTRY [2020-10-20 08:01:10,861 INFO L796 eck$LassoCheckResult]: Loop: 4038#fiboENTRY ~n := #in~n; 4066#L8 assume !(~n < 1); 4052#L10 assume !(1 == ~n); 4037#L13 call #t~ret7 := fibo(~n - 1);< 4038#fiboENTRY [2020-10-20 08:01:10,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:10,862 INFO L82 PathProgramCache]: Analyzing trace with hash -777601154, now seen corresponding path program 1 times [2020-10-20 08:01:10,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:10,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261685989] [2020-10-20 08:01:10,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:10,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:10,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-20 08:01:10,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:10,957 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-20 08:01:10,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261685989] [2020-10-20 08:01:10,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649232458] [2020-10-20 08:01:10,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:01:10,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:10,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 08:01:10,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:11,024 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-20 08:01:11,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:01:11,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-20 08:01:11,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97832924] [2020-10-20 08:01:11,026 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:01:11,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:11,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1512524, now seen corresponding path program 2 times [2020-10-20 08:01:11,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:11,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971517131] [2020-10-20 08:01:11,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:11,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:11,029 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:11,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:11,030 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:11,031 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:01:11,061 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:11,062 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:11,062 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:11,062 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:11,062 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:01:11,062 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:11,062 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:11,062 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:11,062 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration5_Loop [2020-10-20 08:01:11,062 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:11,062 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:11,063 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:11,065 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:11,067 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:11,069 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:11,076 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:11,109 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:11,109 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:11,112 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:11,112 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:11,115 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:11,115 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:11,147 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:11,147 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:11,150 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:11,150 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:11,177 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:11,177 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:11,180 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:11,180 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:11,201 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:11,201 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:11,227 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:01:11,228 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:11,292 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:01:11,293 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:11,294 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:11,294 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:11,294 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:11,294 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:01:11,294 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:11,294 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:11,294 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:11,294 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration5_Loop [2020-10-20 08:01:11,294 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:11,294 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:11,295 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:11,300 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:11,302 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:11,304 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:11,306 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:11,353 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:11,353 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:11,359 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:11,360 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:11,360 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:11,361 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:11,361 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:11,361 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:11,361 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:11,361 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:11,362 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:11,383 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:11,384 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:11,384 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:11,385 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:11,385 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:11,385 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:11,385 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:11,385 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:11,386 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:11,408 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:11,409 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:11,409 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:11,409 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:11,409 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:11,409 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:11,410 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:11,410 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:11,411 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:11,433 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:11,435 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:11,435 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:11,435 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:11,435 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:11,435 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:11,435 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:11,436 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:11,437 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:11,460 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:11,461 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:11,461 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:11,461 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:11,461 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:11,461 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:11,462 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:11,462 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:11,465 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:01:11,475 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 08:01:11,476 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:11,479 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:01:11,479 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:01:11,479 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:01:11,479 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:11,511 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:01:11,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:11,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:11,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 08:01:11,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:11,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:11,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:11,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:11,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:11,637 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2020-10-20 08:01:11,638 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 454 states and 675 transitions. cyclomatic complexity: 231 Second operand 5 states. [2020-10-20 08:01:11,746 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 454 states and 675 transitions. cyclomatic complexity: 231. Second operand 5 states. Result 464 states and 685 transitions. Complement of second has 13 states. [2020-10-20 08:01:11,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:11,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-20 08:01:11,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2020-10-20 08:01:11,747 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 29 letters. Loop has 4 letters. [2020-10-20 08:01:11,747 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:11,747 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:11,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:11,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:11,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 08:01:11,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:11,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:11,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:11,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:11,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:11,859 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2020-10-20 08:01:11,859 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 454 states and 675 transitions. cyclomatic complexity: 231 Second operand 5 states. [2020-10-20 08:01:11,943 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 454 states and 675 transitions. cyclomatic complexity: 231. Second operand 5 states. Result 464 states and 685 transitions. Complement of second has 13 states. [2020-10-20 08:01:11,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:11,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-20 08:01:11,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2020-10-20 08:01:11,945 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 29 letters. Loop has 4 letters. [2020-10-20 08:01:11,947 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:11,947 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:11,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:12,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:12,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 08:01:12,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:12,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:12,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:12,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:12,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:12,098 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2020-10-20 08:01:12,098 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 454 states and 675 transitions. cyclomatic complexity: 231 Second operand 5 states. [2020-10-20 08:01:12,188 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 454 states and 675 transitions. cyclomatic complexity: 231. Second operand 5 states. Result 615 states and 859 transitions. Complement of second has 14 states. [2020-10-20 08:01:12,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:12,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-20 08:01:12,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2020-10-20 08:01:12,190 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 29 letters. Loop has 4 letters. [2020-10-20 08:01:12,190 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:12,191 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 33 letters. Loop has 4 letters. [2020-10-20 08:01:12,191 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:12,191 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 29 letters. Loop has 8 letters. [2020-10-20 08:01:12,191 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:12,192 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 615 states and 859 transitions. [2020-10-20 08:01:12,204 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:01:12,215 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 615 states to 518 states and 750 transitions. [2020-10-20 08:01:12,216 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 187 [2020-10-20 08:01:12,216 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 196 [2020-10-20 08:01:12,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 518 states and 750 transitions. [2020-10-20 08:01:12,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:12,217 INFO L691 BuchiCegarLoop]: Abstraction has 518 states and 750 transitions. [2020-10-20 08:01:12,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states and 750 transitions. [2020-10-20 08:01:12,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 488. [2020-10-20 08:01:12,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 488 states. [2020-10-20 08:01:12,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 714 transitions. [2020-10-20 08:01:12,240 INFO L714 BuchiCegarLoop]: Abstraction has 488 states and 714 transitions. [2020-10-20 08:01:12,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:01:12,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-20 08:01:12,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-20 08:01:12,241 INFO L87 Difference]: Start difference. First operand 488 states and 714 transitions. Second operand 12 states. [2020-10-20 08:01:12,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:01:12,477 INFO L93 Difference]: Finished difference Result 547 states and 814 transitions. [2020-10-20 08:01:12,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 08:01:12,478 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 547 states and 814 transitions. [2020-10-20 08:01:12,489 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:01:12,499 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 547 states to 541 states and 803 transitions. [2020-10-20 08:01:12,499 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 212 [2020-10-20 08:01:12,500 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 212 [2020-10-20 08:01:12,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 541 states and 803 transitions. [2020-10-20 08:01:12,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:12,501 INFO L691 BuchiCegarLoop]: Abstraction has 541 states and 803 transitions. [2020-10-20 08:01:12,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states and 803 transitions. [2020-10-20 08:01:12,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 504. [2020-10-20 08:01:12,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-10-20 08:01:12,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 746 transitions. [2020-10-20 08:01:12,527 INFO L714 BuchiCegarLoop]: Abstraction has 504 states and 746 transitions. [2020-10-20 08:01:12,527 INFO L594 BuchiCegarLoop]: Abstraction has 504 states and 746 transitions. [2020-10-20 08:01:12,527 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-10-20 08:01:12,528 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 504 states and 746 transitions. [2020-10-20 08:01:12,532 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:01:12,532 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:01:12,532 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:01:12,534 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [8, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:12,535 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-20 08:01:12,535 INFO L794 eck$LassoCheckResult]: Stem: 7329#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 7321#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 7317#L27 call main_#t~ret9 := fibo(main_~x~0);< 7339#fiboENTRY ~n := #in~n; 7340#L8 assume !(~n < 1); 7368#L10 assume !(1 == ~n); 7366#L13 call #t~ret7 := fibo(~n - 1);< 7371#fiboENTRY ~n := #in~n; 7369#L8 assume !(~n < 1); 7370#L10 assume !(1 == ~n); 7364#L13 call #t~ret7 := fibo(~n - 1);< 7367#fiboENTRY ~n := #in~n; 7395#L8 assume !(~n < 1); 7393#L10 assume !(1 == ~n); 7387#L13 call #t~ret7 := fibo(~n - 1);< 7391#fiboENTRY ~n := #in~n; 7404#L8 assume !(~n < 1); 7403#L10 assume !(1 == ~n); 7389#L13 call #t~ret7 := fibo(~n - 1);< 7391#fiboENTRY ~n := #in~n; 7408#L8 assume !(~n < 1); 7696#L10 assume 1 == ~n;#res := 1; 7695#fiboFINAL assume true; 7693#fiboEXIT >#35#return; 7684#L13-1 call #t~ret8 := fibo(~n - 2);< 7690#fiboENTRY ~n := #in~n; 7708#L8 assume !(~n < 1); 7709#L10 assume !(1 == ~n); 7710#L13 call #t~ret7 := fibo(~n - 1);< 7719#fiboENTRY ~n := #in~n; 7730#L8 assume !(~n < 1); 7729#L10 assume !(1 == ~n); 7352#L13 call #t~ret7 := fibo(~n - 1);< 7350#fiboENTRY ~n := #in~n; 7354#L8 assume !(~n < 1); 7362#L10 assume !(1 == ~n); 7351#L13 [2020-10-20 08:01:12,535 INFO L796 eck$LassoCheckResult]: Loop: 7351#L13 call #t~ret7 := fibo(~n - 1);< 7350#fiboENTRY ~n := #in~n; 7354#L8 assume !(~n < 1); 7362#L10 assume !(1 == ~n); 7351#L13 [2020-10-20 08:01:12,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:12,536 INFO L82 PathProgramCache]: Analyzing trace with hash 42869646, now seen corresponding path program 2 times [2020-10-20 08:01:12,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:12,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001135876] [2020-10-20 08:01:12,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:12,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:12,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-20 08:01:12,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:12,702 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 81 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-20 08:01:12,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001135876] [2020-10-20 08:01:12,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818969389] [2020-10-20 08:01:12,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:01:12,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 08:01:12,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 08:01:12,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 08:01:12,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:12,758 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 81 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-20 08:01:12,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:01:12,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-20 08:01:12,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272656556] [2020-10-20 08:01:12,759 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:01:12,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:12,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 3 times [2020-10-20 08:01:12,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:12,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094235908] [2020-10-20 08:01:12,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:12,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:12,762 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:12,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:12,764 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:12,764 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:01:12,807 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:12,807 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:12,807 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:12,808 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:12,808 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:01:12,808 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:12,808 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:12,808 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:12,808 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration6_Loop [2020-10-20 08:01:12,809 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:12,809 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:12,810 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:12,813 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:12,815 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:12,823 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:12,878 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:12,879 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:12,882 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:12,882 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:12,886 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:12,887 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:12,925 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:12,925 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:12,929 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:12,929 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:12,967 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:12,967 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:13,008 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:01:13,008 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:19,470 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:01:19,472 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:19,472 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:19,472 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:19,472 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:19,472 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:01:19,472 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:19,473 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:19,473 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:19,473 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration6_Loop [2020-10-20 08:01:19,473 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:19,473 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:19,474 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:19,476 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:19,478 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:19,490 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:19,537 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:19,537 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:19,547 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:19,548 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:19,548 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:19,549 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:19,549 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:19,549 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:19,549 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:19,550 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:19,551 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:19,575 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:19,577 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:19,577 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:19,577 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:19,577 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:19,578 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:19,578 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:19,578 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:19,582 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:19,603 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:19,604 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:19,605 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:19,605 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:19,605 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:19,605 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:19,606 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:19,606 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:19,608 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:01:19,611 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-20 08:01:19,611 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:19,618 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:01:19,618 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:01:19,618 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:01:19,618 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:19,639 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:01:19,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:19,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:19,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-20 08:01:19,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:19,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:19,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:19,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:19,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:19,770 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-20 08:01:19,771 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 504 states and 746 transitions. cyclomatic complexity: 252 Second operand 6 states. [2020-10-20 08:01:19,862 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 504 states and 746 transitions. cyclomatic complexity: 252. Second operand 6 states. Result 516 states and 759 transitions. Complement of second has 18 states. [2020-10-20 08:01:19,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:19,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:01:19,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-10-20 08:01:19,864 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 36 letters. Loop has 4 letters. [2020-10-20 08:01:19,864 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:19,864 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:19,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:19,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:19,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-20 08:01:19,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:19,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:19,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:19,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:19,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:19,984 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-20 08:01:19,984 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 504 states and 746 transitions. cyclomatic complexity: 252 Second operand 6 states. [2020-10-20 08:01:20,077 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 504 states and 746 transitions. cyclomatic complexity: 252. Second operand 6 states. Result 746 states and 1075 transitions. Complement of second has 22 states. [2020-10-20 08:01:20,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:20,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:01:20,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-10-20 08:01:20,079 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 36 letters. Loop has 4 letters. [2020-10-20 08:01:20,079 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:20,079 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 40 letters. Loop has 4 letters. [2020-10-20 08:01:20,079 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:20,080 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 36 letters. Loop has 8 letters. [2020-10-20 08:01:20,080 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:20,080 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 746 states and 1075 transitions. [2020-10-20 08:01:20,091 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:01:20,117 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 746 states to 682 states and 1006 transitions. [2020-10-20 08:01:20,117 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 226 [2020-10-20 08:01:20,118 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 254 [2020-10-20 08:01:20,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 682 states and 1006 transitions. [2020-10-20 08:01:20,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:20,123 INFO L691 BuchiCegarLoop]: Abstraction has 682 states and 1006 transitions. [2020-10-20 08:01:20,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states and 1006 transitions. [2020-10-20 08:01:20,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 665. [2020-10-20 08:01:20,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 665 states. [2020-10-20 08:01:20,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 981 transitions. [2020-10-20 08:01:20,151 INFO L714 BuchiCegarLoop]: Abstraction has 665 states and 981 transitions. [2020-10-20 08:01:20,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:01:20,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-20 08:01:20,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-20 08:01:20,153 INFO L87 Difference]: Start difference. First operand 665 states and 981 transitions. Second operand 13 states. [2020-10-20 08:01:20,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:01:20,335 INFO L93 Difference]: Finished difference Result 164 states and 189 transitions. [2020-10-20 08:01:20,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-20 08:01:20,336 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 164 states and 189 transitions. [2020-10-20 08:01:20,338 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-20 08:01:20,338 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 164 states to 0 states and 0 transitions. [2020-10-20 08:01:20,338 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-20 08:01:20,338 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-20 08:01:20,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-20 08:01:20,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-20 08:01:20,339 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 08:01:20,339 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 08:01:20,339 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 08:01:20,339 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-10-20 08:01:20,339 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-10-20 08:01:20,339 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-20 08:01:20,339 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-10-20 08:01:20,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 20.10 08:01:20 BoogieIcfgContainer [2020-10-20 08:01:20,346 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-20 08:01:20,347 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 08:01:20,347 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 08:01:20,347 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 08:01:20,348 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 08:01:03" (3/4) ... [2020-10-20 08:01:20,351 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 08:01:20,351 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 08:01:20,353 INFO L168 Benchmark]: Toolchain (without parser) took 17674.26 ms. Allocated memory was 40.4 MB in the beginning and 78.6 MB in the end (delta: 38.3 MB). Free memory was 18.2 MB in the beginning and 19.3 MB in the end (delta: -1.1 MB). Peak memory consumption was 37.2 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:20,355 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 30.9 MB. Free memory was 16.8 MB in the beginning and 16.8 MB in the end (delta: 30.6 kB). Peak memory consumption was 30.6 kB. Max. memory is 14.3 GB. [2020-10-20 08:01:20,360 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.64 ms. Allocated memory was 40.4 MB in the beginning and 41.4 MB in the end (delta: 1.0 MB). Free memory was 17.5 MB in the beginning and 18.6 MB in the end (delta: -1.1 MB). Peak memory consumption was 7.9 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:20,361 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.75 ms. Allocated memory is still 41.4 MB. Free memory was 18.4 MB in the beginning and 16.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:20,369 INFO L168 Benchmark]: Boogie Preprocessor took 19.85 ms. Allocated memory is still 41.4 MB. Free memory was 16.9 MB in the beginning and 15.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:20,370 INFO L168 Benchmark]: RCFGBuilder took 264.80 ms. Allocated memory was 41.4 MB in the beginning and 43.0 MB in the end (delta: 1.6 MB). Free memory was 15.8 MB in the beginning and 19.3 MB in the end (delta: -3.5 MB). Peak memory consumption was 5.1 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:20,371 INFO L168 Benchmark]: BuchiAutomizer took 17095.36 ms. Allocated memory was 43.0 MB in the beginning and 78.6 MB in the end (delta: 35.7 MB). Free memory was 19.0 MB in the beginning and 19.3 MB in the end (delta: -295.5 kB). Peak memory consumption was 35.4 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:20,373 INFO L168 Benchmark]: Witness Printer took 4.46 ms. Allocated memory is still 78.6 MB. Free memory is still 19.3 MB. There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 08:01:20,378 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 30.9 MB. Free memory was 16.8 MB in the beginning and 16.8 MB in the end (delta: 30.6 kB). Peak memory consumption was 30.6 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 248.64 ms. Allocated memory was 40.4 MB in the beginning and 41.4 MB in the end (delta: 1.0 MB). Free memory was 17.5 MB in the beginning and 18.6 MB in the end (delta: -1.1 MB). Peak memory consumption was 7.9 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 31.75 ms. Allocated memory is still 41.4 MB. Free memory was 18.4 MB in the beginning and 16.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 19.85 ms. Allocated memory is still 41.4 MB. Free memory was 16.9 MB in the beginning and 15.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. * RCFGBuilder took 264.80 ms. Allocated memory was 41.4 MB in the beginning and 43.0 MB in the end (delta: 1.6 MB). Free memory was 15.8 MB in the beginning and 19.3 MB in the end (delta: -3.5 MB). Peak memory consumption was 5.1 MB. Max. memory is 14.3 GB. * BuchiAutomizer took 17095.36 ms. Allocated memory was 43.0 MB in the beginning and 78.6 MB in the end (delta: 35.7 MB). Free memory was 19.0 MB in the beginning and 19.3 MB in the end (delta: -295.5 kB). Peak memory consumption was 35.4 MB. Max. memory is 14.3 GB. * Witness Printer took 4.46 ms. Allocated memory is still 78.6 MB. Free memory is still 19.3 MB. There was no memory consumed. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 10 terminating modules (5 trivial, 3 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 10 locations. One deterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function n and consists of 9 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. 5 modules have a trivial ranking function, the largest among these consists of 13 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 17.0s and 7 iterations. TraceHistogramMax:8. Analysis of lassos took 12.4s. Construction of modules took 0.9s. Büchi inclusion checks took 3.1s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 9. Automata minimization 0.2s AutomataMinimizationTime, 9 MinimizatonAttempts, 262 StatesRemovedByMinimization, 8 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had 504 states and ocurred in iteration 5. Nontrivial modules had stage [2, 1, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 8/26 HoareTripleCheckerStatistics: 189 SDtfs, 414 SDslu, 261 SDs, 0 SdLazy, 974 SolverSat, 224 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI1 SILT4 lasso0 LassoPreprocessingBenchmarks: Lassos: inital17 mio100 ax100 hnf89 lsp92 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq188 hnf92 smp82 dnf100 smp100 tf110 neg96 sie106 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 31ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 13 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 8.7s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...