./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer --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 61245002f662171c4f63dbacefaa0e216ea9fe3a ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 03:13:30,436 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:13:30,440 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:13:30,513 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:13:30,514 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:13:30,518 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:13:30,522 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:13:30,526 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:13:30,529 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:13:30,535 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:13:30,536 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:13:30,538 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:13:30,538 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:13:30,542 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:13:30,543 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:13:30,545 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:13:30,547 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:13:30,548 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:13:30,553 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:13:30,561 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:13:30,563 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:13:30,565 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:13:30,567 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:13:30,568 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:13:30,577 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:13:30,577 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:13:30,578 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:13:30,580 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:13:30,580 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:13:30,582 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:13:30,582 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:13:30,584 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:13:30,586 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:13:30,587 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:13:30,588 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:13:30,588 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:13:30,589 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:13:30,590 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:13:30,590 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:13:30,591 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:13:30,592 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:13:30,596 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-11-28 03:13:30,634 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:13:30,635 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:13:30,637 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:13:30,637 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:13:30,637 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:13:30,637 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-28 03:13:30,638 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-28 03:13:30,638 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-28 03:13:30,638 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-28 03:13:30,638 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-28 03:13:30,639 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-28 03:13:30,640 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:13:30,640 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:13:30,640 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 03:13:30,640 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:13:30,640 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:13:30,641 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:13:30,641 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-28 03:13:30,641 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-28 03:13:30,641 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-28 03:13:30,641 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:13:30,642 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:13:30,642 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-28 03:13:30,642 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:13:30,642 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-28 03:13:30,643 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:13:30,643 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:13:30,643 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-28 03:13:30,643 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:13:30,645 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:13:30,645 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:13:30,645 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-28 03:13:30,646 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-28 03:13:30,647 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61245002f662171c4f63dbacefaa0e216ea9fe3a [2020-11-28 03:13:30,976 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:13:31,015 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:13:31,019 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:13:31,021 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:13:31,039 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:13:31,040 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c [2020-11-28 03:13:31,123 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/data/e44cfa9af/a4c6bb3c9da44667a2088b5f241d78c6/FLAG9189786d5 [2020-11-28 03:13:31,689 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:13:31,690 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c [2020-11-28 03:13:31,701 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/data/e44cfa9af/a4c6bb3c9da44667a2088b5f241d78c6/FLAG9189786d5 [2020-11-28 03:13:32,046 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/data/e44cfa9af/a4c6bb3c9da44667a2088b5f241d78c6 [2020-11-28 03:13:32,049 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:13:32,050 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:13:32,053 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:13:32,053 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:13:32,057 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:13:32,058 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:13:32" (1/1) ... [2020-11-28 03:13:32,060 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14559458 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:13:32, skipping insertion in model container [2020-11-28 03:13:32,060 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:13:32" (1/1) ... [2020-11-28 03:13:32,067 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:13:32,080 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:13:32,256 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:13:32,269 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:13:32,291 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:13:32,313 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:13:32,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:13:32 WrapperNode [2020-11-28 03:13:32,317 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:13:32,318 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:13:32,318 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:13:32,319 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:13:32,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:13:32" (1/1) ... [2020-11-28 03:13:32,335 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:13:32" (1/1) ... [2020-11-28 03:13:32,354 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:13:32,355 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:13:32,355 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:13:32,356 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:13:32,364 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:13:32" (1/1) ... [2020-11-28 03:13:32,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:13:32" (1/1) ... [2020-11-28 03:13:32,375 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:13:32" (1/1) ... [2020-11-28 03:13:32,375 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:13:32" (1/1) ... [2020-11-28 03:13:32,386 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:13:32" (1/1) ... [2020-11-28 03:13:32,388 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:13:32" (1/1) ... [2020-11-28 03:13:32,389 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:13:32" (1/1) ... [2020-11-28 03:13:32,392 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:13:32,397 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:13:32,397 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:13:32,397 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:13:32,399 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:13:32" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/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 [2020-11-28 03:13:32,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 03:13:32,483 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-11-28 03:13:32,484 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-11-28 03:13:32,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:13:32,484 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-11-28 03:13:32,485 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-11-28 03:13:32,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:13:32,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:13:32,708 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:13:32,709 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-28 03:13:32,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:13:32 BoogieIcfgContainer [2020-11-28 03:13:32,710 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:13:32,711 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-28 03:13:32,712 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-28 03:13:32,715 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-28 03:13:32,716 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-28 03:13:32,716 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 03:13:32" (1/3) ... [2020-11-28 03:13:32,717 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3caf0682 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 03:13:32, skipping insertion in model container [2020-11-28 03:13:32,717 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-28 03:13:32,718 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:13:32" (2/3) ... [2020-11-28 03:13:32,718 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3caf0682 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 03:13:32, skipping insertion in model container [2020-11-28 03:13:32,718 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-28 03:13:32,718 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:13:32" (3/3) ... [2020-11-28 03:13:32,720 INFO L373 chiAutomizerObserver]: Analyzing ICFG fibo_2calls_5-1.c [2020-11-28 03:13:32,777 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-28 03:13:32,777 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-28 03:13:32,777 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-28 03:13:32,778 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:13:32,778 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:13:32,778 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-28 03:13:32,778 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:13:32,778 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-28 03:13:32,791 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 27 states. [2020-11-28 03:13:32,825 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-11-28 03:13:32,825 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:13:32,825 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:13:32,831 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-28 03:13:32,832 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:13:32,832 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-28 03:13:32,832 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 27 states. [2020-11-28 03:13:32,835 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-11-28 03:13:32,835 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:13:32,852 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:13:32,852 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-28 03:13:32,852 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:13:32,859 INFO L794 eck$LassoCheckResult]: Stem: 26#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(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 12#L-1true havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 5; 22#L39true call main_#t~ret11 := fibo1(main_~x~0);< 27#fibo1ENTRYtrue [2020-11-28 03:13:32,860 INFO L796 eck$LassoCheckResult]: Loop: 27#fibo1ENTRYtrue ~n := #in~n; 4#L10true assume !(~n < 1); 10#L12true assume !(1 == ~n); 13#L15true call #t~ret7 := fibo2(~n - 1);< 15#fibo2ENTRYtrue ~n := #in~n; 28#L20true assume !(~n < 1); 20#L22true assume !(1 == ~n); 9#L25true call #t~ret9 := fibo1(~n - 1);< 27#fibo1ENTRYtrue [2020-11-28 03:13:32,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:32,872 INFO L82 PathProgramCache]: Analyzing trace with hash 29898, now seen corresponding path program 1 times [2020-11-28 03:13:32,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:13:32,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362720231] [2020-11-28 03:13:32,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:13:33,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:13:33,041 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:13:33,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:13:33,073 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:13:33,107 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:13:33,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:33,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1206117480, now seen corresponding path program 1 times [2020-11-28 03:13:33,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:13:33,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758475621] [2020-11-28 03:13:33,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:13:33,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:13:33,140 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:13:33,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:13:33,148 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:13:33,151 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:13:33,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:33,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1276411855, now seen corresponding path program 1 times [2020-11-28 03:13:33,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:13:33,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935672756] [2020-11-28 03:13:33,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:13:33,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:13:33,197 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:13:33,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:13:33,231 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:13:33,251 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:13:33,535 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:13:33,536 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:13:33,536 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:13:33,536 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:13:33,536 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-28 03:13:33,536 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:33,536 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:13:33,537 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:13:33,537 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_5-1.c_Iteration1_Loop [2020-11-28 03:13:33,537 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:13:33,537 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:13:33,553 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:33,560 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:33,563 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:33,567 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:33,571 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:33,577 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:33,580 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:33,583 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:33,588 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:33,602 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:33,707 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:13:33,707 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:13:33,714 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:13:33,714 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:33,723 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:13:33,723 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:13:33,768 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:13:33,769 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:33,772 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:13:33,773 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:13:33,815 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:13:33,815 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:33,819 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:13:33,819 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#in~n=0} Honda state: {fibo2_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:13:33,863 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:13:33,863 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:33,868 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:13:33,868 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret7=0} Honda state: {fibo1_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:13:33,912 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:13:33,912 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:33,917 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:13:33,918 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret8=0} Honda state: {fibo1_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:13:33,961 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:13:33,961 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:13:33,986 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:13:33,986 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_~n=0} Honda state: {fibo2_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:13:34,032 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:13:34,032 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:34,036 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:13:34,036 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:13:34,080 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:13:34,080 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:34,084 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:13:34,084 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret9=0} Honda state: {fibo2_#t~ret9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/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 [2020-11-28 03:13:34,128 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:13:34,129 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:13:34,181 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 03:13:34,181 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:34,275 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-28 03:13:34,277 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:13:34,277 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:13:34,278 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:13:34,278 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:13:34,278 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-28 03:13:34,278 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:34,278 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:13:34,278 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:13:34,278 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_5-1.c_Iteration1_Loop [2020-11-28 03:13:34,279 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:13:34,279 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:13:34,281 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:34,286 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:34,291 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:34,296 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:34,300 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:34,306 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:34,309 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:34,314 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:34,317 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:34,333 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:34,429 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:13:34,434 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:13:34,445 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 [2020-11-28 03:13:34,447 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:13:34,448 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:13:34,448 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:13:34,448 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:13:34,449 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:13:34,452 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:13:34,452 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:34,455 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:13:34,502 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 [2020-11-28 03:13:34,504 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:13:34,504 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:13:34,505 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:13:34,505 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:13:34,505 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:13:34,506 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:13:34,506 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:34,508 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:13:34,555 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 [2020-11-28 03:13:34,556 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:13:34,557 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:13:34,557 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:13:34,557 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:13:34,557 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:13:34,558 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:13:34,558 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:34,560 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:13:34,613 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:13:34,615 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:13:34,615 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:13:34,615 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:13:34,616 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:13:34,616 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:13:34,617 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:13:34,617 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:34,619 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:13:34,663 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 [2020-11-28 03:13:34,665 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:13:34,665 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:13:34,666 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:13:34,666 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:13:34,666 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:13:34,667 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:13:34,667 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:34,669 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:13:34,713 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 [2020-11-28 03:13:34,715 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:13:34,715 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:13:34,715 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:13:34,715 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:13:34,715 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:13:34,716 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:13:34,716 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:34,718 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:34,758 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 [2020-11-28 03:13:34,759 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:13:34,759 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:13:34,760 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:13:34,760 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:13:34,760 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:13:34,761 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:13:34,761 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:13:34,762 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:34,805 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 [2020-11-28 03:13:34,809 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:13:34,809 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:13:34,809 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:13:34,809 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:13:34,810 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:13:34,811 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:13:34,811 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:13:34,816 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:13:34,848 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 [2020-11-28 03:13:34,849 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:13:34,850 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:13:34,850 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:13:34,850 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:13:34,850 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:13:34,851 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:13:34,851 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:13:34,854 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:34,865 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-28 03:13:34,865 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:13:34,873 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-28 03:13:34,873 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-28 03:13:34,873 INFO L510 LassoAnalysis]: Proved termination. [2020-11-28 03:13:34,874 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_#in~n) = 1*fibo1_#in~n Supporting invariants [] Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:34,909 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-28 03:13:34,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:34,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:34,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 03:13:34,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:35,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:35,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:13:35,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:35,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:13:35,201 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 5 loop predicates [2020-11-28 03:13:35,202 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 27 states. Second operand 6 states. [2020-11-28 03:13:35,495 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 27 states.. Second operand 6 states. Result 85 states and 117 transitions. Complement of second has 24 states. [2020-11-28 03:13:35,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 1 stem states 5 non-accepting loop states 1 accepting loop states [2020-11-28 03:13:35,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-28 03:13:35,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 21 transitions. [2020-11-28 03:13:35,501 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 3 letters. Loop has 8 letters. [2020-11-28 03:13:35,503 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:13:35,503 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 11 letters. Loop has 8 letters. [2020-11-28 03:13:35,504 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:13:35,504 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 3 letters. Loop has 16 letters. [2020-11-28 03:13:35,505 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:13:35,506 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 85 states and 117 transitions. [2020-11-28 03:13:35,515 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-11-28 03:13:35,525 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 85 states to 61 states and 82 transitions. [2020-11-28 03:13:35,526 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 39 [2020-11-28 03:13:35,527 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 40 [2020-11-28 03:13:35,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 82 transitions. [2020-11-28 03:13:35,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:13:35,530 INFO L691 BuchiCegarLoop]: Abstraction has 61 states and 82 transitions. [2020-11-28 03:13:35,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states and 82 transitions. [2020-11-28 03:13:35,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2020-11-28 03:13:35,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-28 03:13:35,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 72 transitions. [2020-11-28 03:13:35,571 INFO L714 BuchiCegarLoop]: Abstraction has 54 states and 72 transitions. [2020-11-28 03:13:35,571 INFO L594 BuchiCegarLoop]: Abstraction has 54 states and 72 transitions. [2020-11-28 03:13:35,571 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-28 03:13:35,571 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 54 states and 72 transitions. [2020-11-28 03:13:35,574 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-11-28 03:13:35,574 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:13:35,575 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:13:35,576 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:13:35,576 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:13:35,577 INFO L794 eck$LassoCheckResult]: Stem: 234#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(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 230#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 5; 216#L39 call main_#t~ret11 := fibo1(main_~x~0);< 222#fibo1ENTRY ~n := #in~n; 215#L10 assume !(~n < 1); 217#L12 assume !(1 == ~n); 201#L15 call #t~ret7 := fibo2(~n - 1);< 233#fibo2ENTRY ~n := #in~n; 237#L20 assume !(~n < 1); 251#L22 assume !(1 == ~n); 212#L25 call #t~ret9 := fibo1(~n - 1);< 227#fibo1ENTRY ~n := #in~n; 211#L10 assume ~n < 1;#res := 0; 213#fibo1FINAL assume true; 220#fibo1EXIT >#48#return; 221#L25-1 [2020-11-28 03:13:35,577 INFO L796 eck$LassoCheckResult]: Loop: 221#L25-1 call #t~ret10 := fibo1(~n - 2);< 226#fibo1ENTRY ~n := #in~n; 246#L10 assume !(~n < 1); 247#L12 assume !(1 == ~n); 200#L15 call #t~ret7 := fibo2(~n - 1);< 239#fibo2ENTRY ~n := #in~n; 244#L20 assume !(~n < 1); 243#L22 assume !(1 == ~n); 224#L25 call #t~ret9 := fibo1(~n - 1);< 226#fibo1ENTRY ~n := #in~n; 246#L10 assume ~n < 1;#res := 0; 225#fibo1FINAL assume true; 229#fibo1EXIT >#48#return; 221#L25-1 [2020-11-28 03:13:35,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:35,578 INFO L82 PathProgramCache]: Analyzing trace with hash -722660232, now seen corresponding path program 1 times [2020-11-28 03:13:35,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:13:35,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196871499] [2020-11-28 03:13:35,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:13:35,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:35,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-28 03:13:35,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:35,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 03:13:35,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196871499] [2020-11-28 03:13:35,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:13:35,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:13:35,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745252210] [2020-11-28 03:13:35,729 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-28 03:13:35,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:35,730 INFO L82 PathProgramCache]: Analyzing trace with hash -880179458, now seen corresponding path program 1 times [2020-11-28 03:13:35,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:13:35,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298031019] [2020-11-28 03:13:35,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:13:35,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:35,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-28 03:13:35,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:35,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 03:13:35,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298031019] [2020-11-28 03:13:35,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:13:35,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:13:35,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296334721] [2020-11-28 03:13:35,819 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-28 03:13:35,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:13:35,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:13:35,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:13:35,824 INFO L87 Difference]: Start difference. First operand 54 states and 72 transitions. cyclomatic complexity: 20 Second operand 6 states. [2020-11-28 03:13:35,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:13:35,933 INFO L93 Difference]: Finished difference Result 68 states and 88 transitions. [2020-11-28 03:13:35,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:13:35,935 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 68 states and 88 transitions. [2020-11-28 03:13:35,939 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-11-28 03:13:35,942 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 68 states to 66 states and 86 transitions. [2020-11-28 03:13:35,942 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 46 [2020-11-28 03:13:35,943 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 46 [2020-11-28 03:13:35,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 86 transitions. [2020-11-28 03:13:35,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:13:35,943 INFO L691 BuchiCegarLoop]: Abstraction has 66 states and 86 transitions. [2020-11-28 03:13:35,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states and 86 transitions. [2020-11-28 03:13:35,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-11-28 03:13:35,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-28 03:13:35,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2020-11-28 03:13:35,953 INFO L714 BuchiCegarLoop]: Abstraction has 58 states and 76 transitions. [2020-11-28 03:13:35,953 INFO L594 BuchiCegarLoop]: Abstraction has 58 states and 76 transitions. [2020-11-28 03:13:35,953 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-28 03:13:35,953 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 58 states and 76 transitions. [2020-11-28 03:13:35,955 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-11-28 03:13:35,955 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:13:35,955 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:13:35,957 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:13:35,957 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:13:35,957 INFO L794 eck$LassoCheckResult]: Stem: 375#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(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 374#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 5; 355#L39 call main_#t~ret11 := fibo1(main_~x~0);< 364#fibo1ENTRY ~n := #in~n; 354#L10 assume !(~n < 1); 356#L12 assume !(1 == ~n); 346#L15 call #t~ret7 := fibo2(~n - 1);< 378#fibo2ENTRY ~n := #in~n; 399#L20 assume !(~n < 1); 400#L22 assume !(1 == ~n); 352#L25 call #t~ret9 := fibo1(~n - 1);< 371#fibo1ENTRY ~n := #in~n; 351#L10 assume !(~n < 1); 353#L12 assume 1 == ~n;#res := 1; 372#fibo1FINAL assume true; 365#fibo1EXIT >#48#return; 366#L25-1 [2020-11-28 03:13:35,957 INFO L796 eck$LassoCheckResult]: Loop: 366#L25-1 call #t~ret10 := fibo1(~n - 2);< 370#fibo1ENTRY ~n := #in~n; 389#L10 assume !(~n < 1); 390#L12 assume !(1 == ~n); 344#L15 call #t~ret7 := fibo2(~n - 1);< 388#fibo2ENTRY ~n := #in~n; 395#L20 assume !(~n < 1); 393#L22 assume !(1 == ~n); 368#L25 call #t~ret9 := fibo1(~n - 1);< 370#fibo1ENTRY ~n := #in~n; 389#L10 assume !(~n < 1); 390#L12 assume 1 == ~n;#res := 1; 369#fibo1FINAL assume true; 373#fibo1EXIT >#48#return; 366#L25-1 [2020-11-28 03:13:35,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:35,958 INFO L82 PathProgramCache]: Analyzing trace with hash -927605802, now seen corresponding path program 1 times [2020-11-28 03:13:35,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:13:35,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619802622] [2020-11-28 03:13:35,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:13:35,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:36,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-28 03:13:36,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:36,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:13:36,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619802622] [2020-11-28 03:13:36,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906688410] [2020-11-28 03:13:36,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:13:36,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:36,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 03:13:36,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:36,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:13:36,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:13:36,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-28 03:13:36,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916643475] [2020-11-28 03:13:36,164 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-28 03:13:36,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:36,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1515734512, now seen corresponding path program 1 times [2020-11-28 03:13:36,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:13:36,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252532868] [2020-11-28 03:13:36,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:13:36,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:13:36,171 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:13:36,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:13:36,176 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:13:36,178 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:13:36,449 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:13:36,449 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:13:36,449 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:13:36,449 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:13:36,449 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-28 03:13:36,449 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:36,449 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:13:36,449 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:13:36,450 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_5-1.c_Iteration3_Loop [2020-11-28 03:13:36,450 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:13:36,450 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:13:36,451 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:36,459 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:36,463 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:36,468 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:36,472 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:36,484 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:36,489 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:36,492 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:36,496 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:36,625 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:13:36,625 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:13:36,628 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:13:36,628 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:36,632 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:13:36,632 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret7=0} Honda state: {fibo1_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 24 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 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:36,667 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:13:36,667 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:13:36,670 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:13:36,670 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret8=0} Honda state: {fibo1_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/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 [2020-11-28 03:13:36,693 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:13:36,693 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:13:36,695 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:13:36,696 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#in~n=0} Honda state: {fibo1_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/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 [2020-11-28 03:13:36,719 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:13:36,719 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:13:36,722 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:13:36,722 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:13:36,752 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:13:36,752 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 28 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 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:36,780 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 03:13:36,780 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:13:37,406 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-28 03:13:37,407 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:13:37,408 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:13:37,408 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:13:37,408 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:13:37,408 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-28 03:13:37,408 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:37,408 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:13:37,408 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:13:37,408 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_5-1.c_Iteration3_Loop [2020-11-28 03:13:37,408 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:13:37,408 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:13:37,409 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:37,420 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:37,422 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:37,424 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:37,441 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:37,445 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:37,449 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:37,452 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:37,476 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:37,565 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:13:37,565 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:13:37,571 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 [2020-11-28 03:13:37,573 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:13:37,573 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:13:37,573 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:13:37,573 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:13:37,573 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:13:37,574 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:13:37,574 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 [2020-11-28 03:13:37,576 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:13:37,614 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 [2020-11-28 03:13:37,616 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:13:37,616 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:13:37,616 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:13:37,616 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:13:37,616 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:13:37,617 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:13:37,617 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:37,619 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 31 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 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:37,650 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 [2020-11-28 03:13:37,651 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:13:37,651 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:13:37,652 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:13:37,652 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:13:37,652 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:13:37,652 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:13:37,653 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:13:37,654 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:13:37,693 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 [2020-11-28 03:13:37,695 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:13:37,695 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:13:37,695 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:13:37,695 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:13:37,695 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:13:37,697 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:13:37,697 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:37,701 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-28 03:13:37,706 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-28 03:13:37,706 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:13:37,714 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-28 03:13:37,714 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-28 03:13:37,714 INFO L510 LassoAnalysis]: Proved termination. [2020-11-28 03:13:37,715 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_~n) = 1*fibo2_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:37,749 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-28 03:13:37,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:37,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:37,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 03:13:37,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:37,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:37,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-28 03:13:37,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:38,058 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:13:38,058 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 8 loop predicates [2020-11-28 03:13:38,059 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 58 states and 76 transitions. cyclomatic complexity: 20 Second operand 10 states. [2020-11-28 03:13:38,685 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 58 states and 76 transitions. cyclomatic complexity: 20. Second operand 10 states. Result 191 states and 263 transitions. Complement of second has 40 states. [2020-11-28 03:13:38,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 2 stem states 9 non-accepting loop states 1 accepting loop states [2020-11-28 03:13:38,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-28 03:13:38,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 73 transitions. [2020-11-28 03:13:38,687 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 16 letters. Loop has 14 letters. [2020-11-28 03:13:38,688 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:13:38,688 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 30 letters. Loop has 14 letters. [2020-11-28 03:13:38,688 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:13:38,688 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 16 letters. Loop has 28 letters. [2020-11-28 03:13:38,690 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:13:38,690 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 191 states and 263 transitions. [2020-11-28 03:13:38,697 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-11-28 03:13:38,704 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 191 states to 169 states and 237 transitions. [2020-11-28 03:13:38,704 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 103 [2020-11-28 03:13:38,705 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 106 [2020-11-28 03:13:38,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 169 states and 237 transitions. [2020-11-28 03:13:38,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:13:38,706 INFO L691 BuchiCegarLoop]: Abstraction has 169 states and 237 transitions. [2020-11-28 03:13:38,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states and 237 transitions. [2020-11-28 03:13:38,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 152. [2020-11-28 03:13:38,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-11-28 03:13:38,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 206 transitions. [2020-11-28 03:13:38,729 INFO L714 BuchiCegarLoop]: Abstraction has 152 states and 206 transitions. [2020-11-28 03:13:38,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:13:38,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 03:13:38,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:13:38,730 INFO L87 Difference]: Start difference. First operand 152 states and 206 transitions. Second operand 10 states. [2020-11-28 03:13:38,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:13:38,942 INFO L93 Difference]: Finished difference Result 183 states and 244 transitions. [2020-11-28 03:13:38,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 03:13:38,943 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 183 states and 244 transitions. [2020-11-28 03:13:38,948 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-11-28 03:13:38,954 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 183 states to 180 states and 240 transitions. [2020-11-28 03:13:38,954 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 117 [2020-11-28 03:13:38,955 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 117 [2020-11-28 03:13:38,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 180 states and 240 transitions. [2020-11-28 03:13:38,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:13:38,956 INFO L691 BuchiCegarLoop]: Abstraction has 180 states and 240 transitions. [2020-11-28 03:13:38,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states and 240 transitions. [2020-11-28 03:13:38,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 167. [2020-11-28 03:13:38,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-11-28 03:13:38,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 225 transitions. [2020-11-28 03:13:38,989 INFO L714 BuchiCegarLoop]: Abstraction has 167 states and 225 transitions. [2020-11-28 03:13:38,989 INFO L594 BuchiCegarLoop]: Abstraction has 167 states and 225 transitions. [2020-11-28 03:13:38,989 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-28 03:13:38,989 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 167 states and 225 transitions. [2020-11-28 03:13:38,992 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-11-28 03:13:38,993 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:13:38,993 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:13:39,001 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [8, 7, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2020-11-28 03:13:39,002 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2020-11-28 03:13:39,002 INFO L794 eck$LassoCheckResult]: Stem: 1219#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(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 1214#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 5; 1192#L39 call main_#t~ret11 := fibo1(main_~x~0);< 1193#fibo1ENTRY ~n := #in~n; 1257#L10 assume !(~n < 1); 1206#L12 assume !(1 == ~n); 1159#L15 call #t~ret7 := fibo2(~n - 1);< 1216#fibo2ENTRY ~n := #in~n; 1221#L20 assume !(~n < 1); 1175#L22 assume !(1 == ~n); 1176#L25 call #t~ret9 := fibo1(~n - 1);< 1205#fibo1ENTRY ~n := #in~n; 1182#L10 assume !(~n < 1); 1184#L12 assume !(1 == ~n); 1203#L15 call #t~ret7 := fibo2(~n - 1);< 1259#fibo2ENTRY ~n := #in~n; 1261#L20 assume !(~n < 1); 1262#L22 assume !(1 == ~n); 1183#L25 call #t~ret9 := fibo1(~n - 1);< 1205#fibo1ENTRY ~n := #in~n; 1182#L10 assume !(~n < 1); 1184#L12 assume !(1 == ~n); 1203#L15 call #t~ret7 := fibo2(~n - 1);< 1259#fibo2ENTRY ~n := #in~n; 1261#L20 assume ~n < 1;#res := 0; 1260#fibo2FINAL assume true; 1258#fibo2EXIT >#52#return; 1204#L15-1 call #t~ret8 := fibo2(~n - 2);< 1223#fibo2ENTRY ~n := #in~n; 1317#L20 assume !(~n < 1); 1316#L22 assume !(1 == ~n); 1183#L25 call #t~ret9 := fibo1(~n - 1);< 1205#fibo1ENTRY ~n := #in~n; 1256#L10 assume !(~n < 1); 1263#L12 assume 1 == ~n;#res := 1; 1264#fibo1FINAL assume true; 1251#fibo1EXIT >#48#return; 1208#L25-1 call #t~ret10 := fibo1(~n - 2);< 1213#fibo1ENTRY ~n := #in~n; 1249#L10 assume !(~n < 1); 1247#L12 assume !(1 == ~n); 1212#L15 call #t~ret7 := fibo2(~n - 1);< 1246#fibo2ENTRY ~n := #in~n; 1243#L20 assume ~n < 1;#res := 0; 1244#fibo2FINAL assume true; 1248#fibo2EXIT >#52#return; 1211#L15-1 call #t~ret8 := fibo2(~n - 2);< 1246#fibo2ENTRY ~n := #in~n; 1243#L20 assume !(~n < 1); 1239#L22 assume 1 == ~n;#res := 1; 1240#fibo2FINAL assume true; 1308#fibo2EXIT >#54#return; 1307#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 1319#fibo1FINAL assume true; 1318#fibo1EXIT >#50#return; 1188#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 1311#fibo2FINAL assume true; 1309#fibo2EXIT >#54#return; 1307#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 1319#fibo1FINAL assume true; 1318#fibo1EXIT >#48#return; 1186#L25-1 call #t~ret10 := fibo1(~n - 2);< 1300#fibo1ENTRY ~n := #in~n; 1298#L10 assume !(~n < 1); 1296#L12 assume !(1 == ~n); 1170#L15 call #t~ret7 := fibo2(~n - 1);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#52#return; 1172#L15-1 call #t~ret8 := fibo2(~n - 2);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#54#return; 1307#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 1319#fibo1FINAL assume true; 1318#fibo1EXIT >#50#return; 1188#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 1311#fibo2FINAL assume true; 1309#fibo2EXIT >#52#return; 1172#L15-1 [2020-11-28 03:13:39,002 INFO L796 eck$LassoCheckResult]: Loop: 1172#L15-1 call #t~ret8 := fibo2(~n - 2);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume !(~n < 1); 1169#L22 assume !(1 == ~n); 1174#L25 call #t~ret9 := fibo1(~n - 1);< 1300#fibo1ENTRY ~n := #in~n; 1298#L10 assume !(~n < 1); 1296#L12 assume !(1 == ~n); 1170#L15 call #t~ret7 := fibo2(~n - 1);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume !(~n < 1); 1169#L22 assume !(1 == ~n); 1174#L25 call #t~ret9 := fibo1(~n - 1);< 1300#fibo1ENTRY ~n := #in~n; 1298#L10 assume !(~n < 1); 1296#L12 assume !(1 == ~n); 1170#L15 call #t~ret7 := fibo2(~n - 1);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#52#return; 1172#L15-1 call #t~ret8 := fibo2(~n - 2);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#54#return; 1307#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 1319#fibo1FINAL assume true; 1318#fibo1EXIT >#48#return; 1186#L25-1 call #t~ret10 := fibo1(~n - 2);< 1300#fibo1ENTRY ~n := #in~n; 1298#L10 assume !(~n < 1); 1296#L12 assume !(1 == ~n); 1170#L15 call #t~ret7 := fibo2(~n - 1);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#52#return; 1172#L15-1 call #t~ret8 := fibo2(~n - 2);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#54#return; 1307#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 1319#fibo1FINAL assume true; 1318#fibo1EXIT >#50#return; 1188#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 1311#fibo2FINAL assume true; 1309#fibo2EXIT >#52#return; 1172#L15-1 [2020-11-28 03:13:39,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:39,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1380034771, now seen corresponding path program 1 times [2020-11-28 03:13:39,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:13:39,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228926693] [2020-11-28 03:13:39,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:13:39,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:39,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-28 03:13:39,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:39,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:13:39,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:39,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:13:39,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:39,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-28 03:13:39,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:39,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:13:39,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:39,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:13:39,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:39,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:13:39,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:39,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-28 03:13:39,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:39,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-11-28 03:13:39,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:39,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:13:39,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:39,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-28 03:13:39,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:39,433 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 21 proven. 84 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-11-28 03:13:39,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228926693] [2020-11-28 03:13:39,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029093714] [2020-11-28 03:13:39,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:13:39,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:39,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-28 03:13:39,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:39,725 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 30 proven. 79 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-11-28 03:13:39,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:13:39,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2020-11-28 03:13:39,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935315456] [2020-11-28 03:13:39,727 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-28 03:13:39,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:39,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1411437133, now seen corresponding path program 1 times [2020-11-28 03:13:39,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:13:39,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220405926] [2020-11-28 03:13:39,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:13:39,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:39,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-28 03:13:39,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:39,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:13:39,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:39,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:13:39,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:39,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-28 03:13:39,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:39,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-28 03:13:39,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:39,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:13:39,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:39,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-28 03:13:39,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:39,859 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-11-28 03:13:39,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220405926] [2020-11-28 03:13:39,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800640538] [2020-11-28 03:13:39,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:13:39,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:39,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 03:13:39,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:40,027 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-11-28 03:13:40,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:13:40,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 12 [2020-11-28 03:13:40,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551089343] [2020-11-28 03:13:40,028 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-28 03:13:40,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:13:40,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-28 03:13:40,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-11-28 03:13:40,029 INFO L87 Difference]: Start difference. First operand 167 states and 225 transitions. cyclomatic complexity: 63 Second operand 12 states. [2020-11-28 03:13:40,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:13:40,376 INFO L93 Difference]: Finished difference Result 223 states and 293 transitions. [2020-11-28 03:13:40,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-28 03:13:40,378 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 223 states and 293 transitions. [2020-11-28 03:13:40,383 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-11-28 03:13:40,389 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 223 states to 200 states and 262 transitions. [2020-11-28 03:13:40,389 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 134 [2020-11-28 03:13:40,390 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 134 [2020-11-28 03:13:40,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 200 states and 262 transitions. [2020-11-28 03:13:40,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:13:40,391 INFO L691 BuchiCegarLoop]: Abstraction has 200 states and 262 transitions. [2020-11-28 03:13:40,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states and 262 transitions. [2020-11-28 03:13:40,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 184. [2020-11-28 03:13:40,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-11-28 03:13:40,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 238 transitions. [2020-11-28 03:13:40,409 INFO L714 BuchiCegarLoop]: Abstraction has 184 states and 238 transitions. [2020-11-28 03:13:40,409 INFO L594 BuchiCegarLoop]: Abstraction has 184 states and 238 transitions. [2020-11-28 03:13:40,409 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-11-28 03:13:40,409 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 184 states and 238 transitions. [2020-11-28 03:13:40,411 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-11-28 03:13:40,411 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:13:40,412 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:13:40,413 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:13:40,413 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:13:40,413 INFO L794 eck$LassoCheckResult]: Stem: 2331#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 2321#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 5; 2303#L39 call main_#t~ret11 := fibo1(main_~x~0);< 2304#fibo1ENTRY ~n := #in~n; 2366#L10 assume !(~n < 1); 2320#L12 assume !(1 == ~n); 2284#L15 call #t~ret7 := fibo2(~n - 1);< 2324#fibo2ENTRY ~n := #in~n; 2415#L20 assume !(~n < 1); 2283#L22 assume !(1 == ~n); 2285#L25 call #t~ret9 := fibo1(~n - 1);< 2313#fibo1ENTRY ~n := #in~n; 2352#L10 assume !(~n < 1); 2350#L12 assume !(1 == ~n); 2267#L15 call #t~ret7 := fibo2(~n - 1);< 2346#fibo2ENTRY ~n := #in~n; 2369#L20 assume !(~n < 1); 2368#L22 assume !(1 == ~n); 2338#L25 call #t~ret9 := fibo1(~n - 1);< 2313#fibo1ENTRY ~n := #in~n; 2355#L10 assume !(~n < 1); 2379#L12 assume 1 == ~n;#res := 1; 2380#fibo1FINAL assume true; 2446#fibo1EXIT >#48#return; 2293#L25-1 call #t~ret10 := fibo1(~n - 2);< 2316#fibo1ENTRY ~n := #in~n; 2292#L10 assume ~n < 1;#res := 0; 2294#fibo1FINAL assume true; 2449#fibo1EXIT >#50#return; 2266#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 2269#fibo2FINAL assume true; 2389#fibo2EXIT >#52#return; 2288#L15-1 [2020-11-28 03:13:40,413 INFO L796 eck$LassoCheckResult]: Loop: 2288#L15-1 call #t~ret8 := fibo2(~n - 2);< 2337#fibo2ENTRY ~n := #in~n; 2416#L20 assume !(~n < 1); 2417#L22 assume !(1 == ~n); 2396#L25 call #t~ret9 := fibo1(~n - 1);< 2405#fibo1ENTRY ~n := #in~n; 2410#L10 assume !(~n < 1); 2408#L12 assume !(1 == ~n); 2289#L15 call #t~ret7 := fibo2(~n - 1);< 2337#fibo2ENTRY ~n := #in~n; 2416#L20 assume !(~n < 1); 2417#L22 assume 1 == ~n;#res := 1; 2286#fibo2FINAL assume true; 2290#fibo2EXIT >#52#return; 2288#L15-1 [2020-11-28 03:13:40,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:40,414 INFO L82 PathProgramCache]: Analyzing trace with hash -658151768, now seen corresponding path program 1 times [2020-11-28 03:13:40,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:13:40,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629726455] [2020-11-28 03:13:40,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:13:40,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:13:40,429 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:13:40,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:13:40,443 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:13:40,450 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:13:40,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:40,452 INFO L82 PathProgramCache]: Analyzing trace with hash -815837104, now seen corresponding path program 1 times [2020-11-28 03:13:40,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:13:40,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418690909] [2020-11-28 03:13:40,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:13:40,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:13:40,459 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:13:40,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:13:40,468 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:13:40,474 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:13:40,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:40,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1977386679, now seen corresponding path program 1 times [2020-11-28 03:13:40,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:13:40,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534871732] [2020-11-28 03:13:40,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:13:40,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:40,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-28 03:13:40,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:40,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:13:40,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:40,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:13:40,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:40,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-11-28 03:13:40,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:40,648 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-28 03:13:40,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534871732] [2020-11-28 03:13:40,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273470441] [2020-11-28 03:13:40,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:13:40,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:40,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-28 03:13:40,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:40,753 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 36 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-28 03:13:40,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:13:40,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 14 [2020-11-28 03:13:40,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193070617] [2020-11-28 03:13:40,953 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:13:40,953 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:13:40,953 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:13:40,953 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:13:40,953 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-28 03:13:40,953 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:40,953 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:13:40,953 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:13:40,954 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_5-1.c_Iteration5_Loop [2020-11-28 03:13:40,954 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:13:40,954 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:13:40,955 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:40,961 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:40,964 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:40,982 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:40,985 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:40,987 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:40,995 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:40,998 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:41,004 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:41,099 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:13:41,099 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/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 [2020-11-28 03:13:41,103 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:13:41,103 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:13:41,106 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:13:41,106 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret9=0} Honda state: {fibo2_#t~ret9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/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 [2020-11-28 03:13:41,130 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:13:41,130 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:13:41,132 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:13:41,132 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#in~n=0} Honda state: {fibo2_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/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 [2020-11-28 03:13:41,157 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:13:41,157 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:13:41,160 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:13:41,160 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret7=1} Honda state: {fibo1_#t~ret7=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/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 [2020-11-28 03:13:41,187 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:13:41,187 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:13:41,189 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:13:41,189 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/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 [2020-11-28 03:13:41,211 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:13:41,212 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:13:41,214 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:13:41,214 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:41,236 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:13:41,236 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:41,261 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 03:13:41,261 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:13:41,965 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-28 03:13:41,967 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:13:41,967 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:13:41,967 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:13:41,967 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:13:41,967 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-28 03:13:41,967 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:41,967 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:13:41,967 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:13:41,967 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_5-1.c_Iteration5_Loop [2020-11-28 03:13:41,967 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:13:41,967 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:13:41,968 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:41,973 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:41,975 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:41,978 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:41,980 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:41,983 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:41,986 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:41,988 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:41,995 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:42,132 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:13:42,132 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 44 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 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:42,143 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 [2020-11-28 03:13:42,144 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:13:42,144 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:13:42,145 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:13:42,145 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:13:42,145 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:13:42,145 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:13:42,145 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:13:42,146 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:42,169 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 [2020-11-28 03:13:42,171 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:13:42,171 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:13:42,171 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:13:42,171 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:13:42,171 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:13:42,171 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:13:42,171 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:13:42,173 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:42,195 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 [2020-11-28 03:13:42,196 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:13:42,196 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:13:42,196 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:13:42,196 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:13:42,196 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:13:42,197 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:13:42,197 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:13:42,198 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:42,221 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 [2020-11-28 03:13:42,222 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:13:42,222 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:13:42,222 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:13:42,222 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:13:42,222 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:13:42,223 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:13:42,223 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:13:42,230 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:42,253 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 [2020-11-28 03:13:42,254 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:13:42,254 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:13:42,254 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:13:42,254 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:13:42,254 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:13:42,255 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:13:42,255 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:13:42,256 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/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 [2020-11-28 03:13:42,277 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 [2020-11-28 03:13:42,279 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:13:42,279 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:13:42,279 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:13:42,279 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:13:42,279 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:13:42,280 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:13:42,280 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:13:42,294 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/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 [2020-11-28 03:13:42,327 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 [2020-11-28 03:13:42,328 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:13:42,328 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:13:42,328 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:13:42,328 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:13:42,328 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:13:42,329 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:13:42,329 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:13:42,330 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:13:42,368 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 [2020-11-28 03:13:42,370 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:13:42,370 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:13:42,370 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:13:42,370 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:13:42,370 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:13:42,372 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:13:42,372 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:42,376 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-28 03:13:42,386 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-28 03:13:42,386 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:13:42,389 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-28 03:13:42,389 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-28 03:13:42,389 INFO L510 LassoAnalysis]: Proved termination. [2020-11-28 03:13:42,389 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:42,425 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-28 03:13:42,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:42,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:42,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-28 03:13:42,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:42,536 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:13:42,550 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:13:42,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:42,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-28 03:13:42,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:42,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:13:42,735 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 8 loop predicates [2020-11-28 03:13:42,735 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 184 states and 238 transitions. cyclomatic complexity: 59 Second operand 10 states. [2020-11-28 03:13:43,298 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 184 states and 238 transitions. cyclomatic complexity: 59. Second operand 10 states. Result 717 states and 936 transitions. Complement of second has 40 states. [2020-11-28 03:13:43,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 2 stem states 9 non-accepting loop states 1 accepting loop states [2020-11-28 03:13:43,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-28 03:13:43,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 69 transitions. [2020-11-28 03:13:43,303 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 69 transitions. Stem has 32 letters. Loop has 14 letters. [2020-11-28 03:13:43,304 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:13:43,304 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 69 transitions. Stem has 46 letters. Loop has 14 letters. [2020-11-28 03:13:43,304 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:13:43,305 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 69 transitions. Stem has 32 letters. Loop has 28 letters. [2020-11-28 03:13:43,306 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:13:43,306 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 717 states and 936 transitions. [2020-11-28 03:13:43,324 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 40 [2020-11-28 03:13:43,343 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 717 states to 646 states and 859 transitions. [2020-11-28 03:13:43,343 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 301 [2020-11-28 03:13:43,346 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 308 [2020-11-28 03:13:43,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 646 states and 859 transitions. [2020-11-28 03:13:43,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:13:43,347 INFO L691 BuchiCegarLoop]: Abstraction has 646 states and 859 transitions. [2020-11-28 03:13:43,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states and 859 transitions. [2020-11-28 03:13:43,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 625. [2020-11-28 03:13:43,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2020-11-28 03:13:43,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 829 transitions. [2020-11-28 03:13:43,414 INFO L714 BuchiCegarLoop]: Abstraction has 625 states and 829 transitions. [2020-11-28 03:13:43,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:13:43,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-28 03:13:43,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-11-28 03:13:43,415 INFO L87 Difference]: Start difference. First operand 625 states and 829 transitions. Second operand 14 states. [2020-11-28 03:13:43,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:13:43,721 INFO L93 Difference]: Finished difference Result 234 states and 284 transitions. [2020-11-28 03:13:43,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-28 03:13:43,723 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 234 states and 284 transitions. [2020-11-28 03:13:43,726 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 18 [2020-11-28 03:13:43,730 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 234 states to 219 states and 269 transitions. [2020-11-28 03:13:43,730 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 155 [2020-11-28 03:13:43,730 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 155 [2020-11-28 03:13:43,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 219 states and 269 transitions. [2020-11-28 03:13:43,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:13:43,731 INFO L691 BuchiCegarLoop]: Abstraction has 219 states and 269 transitions. [2020-11-28 03:13:43,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states and 269 transitions. [2020-11-28 03:13:43,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 199. [2020-11-28 03:13:43,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-11-28 03:13:43,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 245 transitions. [2020-11-28 03:13:43,740 INFO L714 BuchiCegarLoop]: Abstraction has 199 states and 245 transitions. [2020-11-28 03:13:43,740 INFO L594 BuchiCegarLoop]: Abstraction has 199 states and 245 transitions. [2020-11-28 03:13:43,741 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-11-28 03:13:43,741 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 199 states and 245 transitions. [2020-11-28 03:13:43,743 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 18 [2020-11-28 03:13:43,743 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:13:43,743 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:13:43,746 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:13:43,746 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:13:43,748 INFO L794 eck$LassoCheckResult]: Stem: 4497#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 4496#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 5; 4466#L39 call main_#t~ret11 := fibo1(main_~x~0);< 4467#fibo1ENTRY ~n := #in~n; 4550#L10 assume !(~n < 1); 4488#L12 assume !(1 == ~n); 4483#L15 call #t~ret7 := fibo2(~n - 1);< 4567#fibo2ENTRY ~n := #in~n; 4512#L20 assume !(~n < 1); 4513#L22 assume !(1 == ~n); 4454#L25 call #t~ret9 := fibo1(~n - 1);< 4484#fibo1ENTRY ~n := #in~n; 4499#L10 assume !(~n < 1); 4556#L12 assume !(1 == ~n); 4547#L15 call #t~ret7 := fibo2(~n - 1);< 4548#fibo2ENTRY ~n := #in~n; 4555#L20 assume !(~n < 1); 4554#L22 assume 1 == ~n;#res := 1; 4553#fibo2FINAL assume true; 4546#fibo2EXIT >#52#return; 4544#L15-1 call #t~ret8 := fibo2(~n - 2);< 4545#fibo2ENTRY ~n := #in~n; 4551#L20 assume ~n < 1;#res := 0; 4549#fibo2FINAL assume true; 4543#fibo2EXIT >#54#return; 4542#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 4541#fibo1FINAL assume true; 4538#fibo1EXIT >#48#return; 4526#L25-1 call #t~ret10 := fibo1(~n - 2);< 4495#fibo1ENTRY ~n := #in~n; 4531#L10 assume !(~n < 1); 4529#L12 assume !(1 == ~n); 4494#L15 call #t~ret7 := fibo2(~n - 1);< 4522#fibo2ENTRY ~n := #in~n; 4520#L20 assume !(~n < 1); 4518#L22 assume !(1 == ~n); 4476#L25 call #t~ret9 := fibo1(~n - 1);< 4613#fibo1ENTRY ~n := #in~n; 4635#L10 assume !(~n < 1); 4558#L12 assume !(1 == ~n); 4442#L15 call #t~ret7 := fibo2(~n - 1);< 4500#fibo2ENTRY [2020-11-28 03:13:43,748 INFO L796 eck$LassoCheckResult]: Loop: 4500#fibo2ENTRY ~n := #in~n; 4598#L20 assume !(~n < 1); 4560#L22 assume !(1 == ~n); 4469#L25 call #t~ret9 := fibo1(~n - 1);< 4482#fibo1ENTRY ~n := #in~n; 4638#L10 assume !(~n < 1); 4633#L12 assume !(1 == ~n); 4443#L15 call #t~ret7 := fibo2(~n - 1);< 4500#fibo2ENTRY [2020-11-28 03:13:43,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:43,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1779459932, now seen corresponding path program 1 times [2020-11-28 03:13:43,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:13:43,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104924666] [2020-11-28 03:13:43,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:13:43,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:43,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-28 03:13:43,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:43,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:13:43,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:43,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:13:43,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:43,932 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 25 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-28 03:13:43,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104924666] [2020-11-28 03:13:43,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921455367] [2020-11-28 03:13:43,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:13:43,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:43,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-28 03:13:43,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:44,106 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 25 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-28 03:13:44,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:13:44,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-11-28 03:13:44,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330363126] [2020-11-28 03:13:44,107 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-28 03:13:44,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:44,107 INFO L82 PathProgramCache]: Analyzing trace with hash 996300776, now seen corresponding path program 2 times [2020-11-28 03:13:44,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:13:44,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132751090] [2020-11-28 03:13:44,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:13:44,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:13:44,109 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:13:44,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:13:44,111 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:13:44,111 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:13:44,209 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:13:44,209 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:13:44,209 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:13:44,209 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:13:44,209 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-28 03:13:44,209 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:44,209 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:13:44,209 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:13:44,209 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_5-1.c_Iteration6_Loop [2020-11-28 03:13:44,210 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:13:44,210 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:13:44,211 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:44,226 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:44,229 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:44,232 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:44,239 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:44,241 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:44,243 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:44,245 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:44,252 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:44,258 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:44,308 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:13:44,308 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:44,312 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:13:44,312 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:13:44,314 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:13:44,314 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret8=0} Honda state: {fibo1_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:13:44,337 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:13:44,337 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:44,339 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:13:44,339 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#in~n=0} Honda state: {fibo1_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:44,361 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:13:44,361 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:13:44,364 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:13:44,364 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:13:44,387 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:13:44,387 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:44,389 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:13:44,389 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:44,412 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:13:44,413 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:13:44,415 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:13:44,415 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_~n=0} Honda state: {fibo2_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:44,438 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:13:44,438 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:13:44,440 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:13:44,440 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 60 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 60 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:44,462 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:13:44,462 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:13:44,468 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:13:44,468 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret10=0} Honda state: {fibo2_#t~ret10=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 61 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 61 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:44,499 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:13:44,499 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:13:44,501 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:13:44,501 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret9=0} Honda state: {fibo2_#t~ret9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 62 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 62 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:44,523 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:13:44,524 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 63 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 63 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:44,561 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 03:13:44,561 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:13:44,616 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-28 03:13:44,617 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:13:44,618 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:13:44,618 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:13:44,618 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:13:44,618 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-28 03:13:44,618 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:44,618 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:13:44,618 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:13:44,618 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_5-1.c_Iteration6_Loop [2020-11-28 03:13:44,618 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:13:44,618 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:13:44,619 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:44,634 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:44,636 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:44,638 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:44,641 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:44,643 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:44,645 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:44,649 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:44,651 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:44,653 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:44,706 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:13:44,706 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 64 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 64 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:44,715 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 [2020-11-28 03:13:44,716 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:13:44,716 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:13:44,716 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:13:44,716 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:13:44,716 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:13:44,716 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:13:44,717 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:13:44,718 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 65 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 65 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:44,740 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:13:44,741 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:13:44,741 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:13:44,741 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:13:44,741 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:13:44,741 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:13:44,742 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:13:44,742 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:13:44,743 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 66 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 66 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:44,765 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 [2020-11-28 03:13:44,766 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:13:44,766 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:13:44,766 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:13:44,766 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:13:44,766 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:13:44,767 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:13:44,767 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:13:44,768 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 67 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 67 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:44,790 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 [2020-11-28 03:13:44,792 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:13:44,792 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:13:44,792 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:13:44,792 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:13:44,792 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:13:44,793 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:13:44,793 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:13:44,800 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:13:44,837 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 [2020-11-28 03:13:44,840 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:13:44,840 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:13:44,841 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:13:44,841 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:13:44,841 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:13:44,842 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:13:44,843 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:44,844 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 69 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 69 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:44,876 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 [2020-11-28 03:13:44,878 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:13:44,878 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:13:44,878 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:13:44,878 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:13:44,878 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:13:44,879 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:13:44,879 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:13:44,881 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 70 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 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:44,903 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 [2020-11-28 03:13:44,904 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:13:44,904 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:13:44,904 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:13:44,904 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:13:44,904 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:13:44,905 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:13:44,905 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:13:44,906 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 71 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 71 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:44,928 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 [2020-11-28 03:13:44,929 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:13:44,929 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:13:44,929 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:13:44,929 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:13:44,930 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:13:44,930 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:13:44,930 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:13:44,931 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 72 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 72 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:44,959 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 [2020-11-28 03:13:44,961 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:13:44,961 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:13:44,961 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:13:44,961 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:13:44,961 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:13:44,962 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:13:44,962 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:13:44,963 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 73 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 73 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:44,986 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 [2020-11-28 03:13:44,987 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:13:44,987 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:13:44,987 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:13:44,987 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:13:44,988 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:13:44,988 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:13:44,988 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:13:44,990 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-28 03:13:44,992 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-28 03:13:44,992 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 74 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 74 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:44,995 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-28 03:13:44,995 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-28 03:13:44,995 INFO L510 LassoAnalysis]: Proved termination. [2020-11-28 03:13:44,995 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_#in~n) = 1*fibo2_#in~n Supporting invariants [] [2020-11-28 03:13:45,019 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-28 03:13:45,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:45,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:45,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-28 03:13:45,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:45,151 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:13:45,154 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:13:45,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:45,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:13:45,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:45,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:13:45,265 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2020-11-28 03:13:45,265 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 199 states and 245 transitions. cyclomatic complexity: 51 Second operand 7 states. [2020-11-28 03:13:45,402 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 199 states and 245 transitions. cyclomatic complexity: 51. Second operand 7 states. Result 223 states and 270 transitions. Complement of second has 21 states. [2020-11-28 03:13:45,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2020-11-28 03:13:45,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-28 03:13:45,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 23 transitions. [2020-11-28 03:13:45,404 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 23 transitions. Stem has 41 letters. Loop has 8 letters. [2020-11-28 03:13:45,404 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:13:45,404 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-28 03:13:45,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:45,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:45,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-28 03:13:45,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:45,584 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:13:45,587 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:13:45,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:45,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:13:45,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:45,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:13:45,678 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 5 loop predicates [2020-11-28 03:13:45,678 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 199 states and 245 transitions. cyclomatic complexity: 51 Second operand 7 states. [2020-11-28 03:13:45,837 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 199 states and 245 transitions. cyclomatic complexity: 51. Second operand 7 states. Result 223 states and 270 transitions. Complement of second has 21 states. [2020-11-28 03:13:45,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2020-11-28 03:13:45,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-28 03:13:45,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 23 transitions. [2020-11-28 03:13:45,838 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 23 transitions. Stem has 41 letters. Loop has 8 letters. [2020-11-28 03:13:45,839 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:13:45,839 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-28 03:13:45,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:45,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:45,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-28 03:13:45,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:45,974 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:13:45,982 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:13:46,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:46,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:13:46,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:46,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:13:46,074 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 5 loop predicates [2020-11-28 03:13:46,074 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 199 states and 245 transitions. cyclomatic complexity: 51 Second operand 7 states. [2020-11-28 03:13:46,298 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 199 states and 245 transitions. cyclomatic complexity: 51. Second operand 7 states. Result 401 states and 472 transitions. Complement of second has 25 states. [2020-11-28 03:13:46,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2020-11-28 03:13:46,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-28 03:13:46,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 42 transitions. [2020-11-28 03:13:46,302 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 42 transitions. Stem has 41 letters. Loop has 8 letters. [2020-11-28 03:13:46,302 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:13:46,303 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 42 transitions. Stem has 49 letters. Loop has 8 letters. [2020-11-28 03:13:46,304 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:13:46,306 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 42 transitions. Stem has 41 letters. Loop has 16 letters. [2020-11-28 03:13:46,306 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:13:46,307 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 401 states and 472 transitions. [2020-11-28 03:13:46,312 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 34 [2020-11-28 03:13:46,317 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 401 states to 297 states and 362 transitions. [2020-11-28 03:13:46,317 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 171 [2020-11-28 03:13:46,318 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 185 [2020-11-28 03:13:46,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 297 states and 362 transitions. [2020-11-28 03:13:46,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:13:46,318 INFO L691 BuchiCegarLoop]: Abstraction has 297 states and 362 transitions. [2020-11-28 03:13:46,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states and 362 transitions. [2020-11-28 03:13:46,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 272. [2020-11-28 03:13:46,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-11-28 03:13:46,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 328 transitions. [2020-11-28 03:13:46,328 INFO L714 BuchiCegarLoop]: Abstraction has 272 states and 328 transitions. [2020-11-28 03:13:46,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:13:46,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-28 03:13:46,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-11-28 03:13:46,329 INFO L87 Difference]: Start difference. First operand 272 states and 328 transitions. Second operand 13 states. [2020-11-28 03:13:46,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:13:46,678 INFO L93 Difference]: Finished difference Result 304 states and 372 transitions. [2020-11-28 03:13:46,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-28 03:13:46,679 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 304 states and 372 transitions. [2020-11-28 03:13:46,684 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 28 [2020-11-28 03:13:46,690 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 304 states to 302 states and 370 transitions. [2020-11-28 03:13:46,691 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 192 [2020-11-28 03:13:46,691 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 192 [2020-11-28 03:13:46,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 302 states and 370 transitions. [2020-11-28 03:13:46,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:13:46,698 INFO L691 BuchiCegarLoop]: Abstraction has 302 states and 370 transitions. [2020-11-28 03:13:46,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states and 370 transitions. [2020-11-28 03:13:46,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 277. [2020-11-28 03:13:46,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-11-28 03:13:46,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 336 transitions. [2020-11-28 03:13:46,712 INFO L714 BuchiCegarLoop]: Abstraction has 277 states and 336 transitions. [2020-11-28 03:13:46,712 INFO L594 BuchiCegarLoop]: Abstraction has 277 states and 336 transitions. [2020-11-28 03:13:46,712 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-11-28 03:13:46,712 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 277 states and 336 transitions. [2020-11-28 03:13:46,715 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 28 [2020-11-28 03:13:46,715 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:13:46,715 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:13:46,718 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:13:46,719 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:13:46,720 INFO L794 eck$LassoCheckResult]: Stem: 6854#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(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 6844#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 5; 6824#L39 call main_#t~ret11 := fibo1(main_~x~0);< 6825#fibo1ENTRY ~n := #in~n; 6911#L10 assume !(~n < 1); 6910#L12 assume !(1 == ~n); 6906#L15 call #t~ret7 := fibo2(~n - 1);< 6909#fibo2ENTRY ~n := #in~n; 6908#L20 assume !(~n < 1); 6907#L22 assume !(1 == ~n); 6882#L25 call #t~ret9 := fibo1(~n - 1);< 6883#fibo1ENTRY ~n := #in~n; 6905#L10 assume !(~n < 1); 6902#L12 assume !(1 == ~n); 6878#L15 call #t~ret7 := fibo2(~n - 1);< 6891#fibo2ENTRY ~n := #in~n; 6892#L20 assume !(~n < 1); 7049#L22 assume !(1 == ~n); 7043#L25 call #t~ret9 := fibo1(~n - 1);< 7044#fibo1ENTRY ~n := #in~n; 7050#L10 assume !(~n < 1); 7048#L12 assume 1 == ~n;#res := 1; 7046#fibo1FINAL assume true; 7042#fibo1EXIT >#48#return; 7028#L25-1 call #t~ret10 := fibo1(~n - 2);< 7029#fibo1ENTRY ~n := #in~n; 7033#L10 assume ~n < 1;#res := 0; 7032#fibo1FINAL assume true; 7027#fibo1EXIT >#50#return; 7024#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 7019#fibo2FINAL assume true; 7015#fibo2EXIT >#52#return; 6972#L15-1 call #t~ret8 := fibo2(~n - 2);< 6973#fibo2ENTRY ~n := #in~n; 6981#L20 assume ~n < 1;#res := 0; 6980#fibo2FINAL assume true; 6971#fibo2EXIT >#54#return; 6969#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 6968#fibo1FINAL assume true; 6962#fibo1EXIT >#48#return; 6850#L25-1 call #t~ret10 := fibo1(~n - 2);< 6952#fibo1ENTRY [2020-11-28 03:13:46,721 INFO L796 eck$LassoCheckResult]: Loop: 6952#fibo1ENTRY ~n := #in~n; 6946#L10 assume !(~n < 1); 6948#L12 assume !(1 == ~n); 6848#L15 call #t~ret7 := fibo2(~n - 1);< 6852#fibo2ENTRY ~n := #in~n; 6974#L20 assume !(~n < 1); 6970#L22 assume !(1 == ~n); 6960#L25 call #t~ret9 := fibo1(~n - 1);< 6966#fibo1ENTRY ~n := #in~n; 6979#L10 assume !(~n < 1); 6978#L12 assume !(1 == ~n); 6965#L15 call #t~ret7 := fibo2(~n - 1);< 6975#fibo2ENTRY ~n := #in~n; 6976#L20 assume !(~n < 1); 7011#L22 assume !(1 == ~n); 7010#L25 call #t~ret9 := fibo1(~n - 1);< 7035#fibo1ENTRY ~n := #in~n; 7038#L10 assume !(~n < 1); 7037#L12 assume 1 == ~n;#res := 1; 7036#fibo1FINAL assume true; 7034#fibo1EXIT >#48#return; 7022#L25-1 call #t~ret10 := fibo1(~n - 2);< 7023#fibo1ENTRY ~n := #in~n; 7031#L10 assume ~n < 1;#res := 0; 7030#fibo1FINAL assume true; 7021#fibo1EXIT >#50#return; 7018#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 7014#fibo2FINAL assume true; 6991#fibo2EXIT >#52#return; 6987#L15-1 call #t~ret8 := fibo2(~n - 2);< 6989#fibo2ENTRY ~n := #in~n; 7001#L20 assume ~n < 1;#res := 0; 7000#fibo2FINAL assume true; 6985#fibo2EXIT >#54#return; 6983#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 6964#fibo1FINAL assume true; 6963#fibo1EXIT >#48#return; 6851#L25-1 call #t~ret10 := fibo1(~n - 2);< 6952#fibo1ENTRY [2020-11-28 03:13:46,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:46,721 INFO L82 PathProgramCache]: Analyzing trace with hash -205691575, now seen corresponding path program 1 times [2020-11-28 03:13:46,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:13:46,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978372054] [2020-11-28 03:13:46,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:13:46,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:46,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-28 03:13:46,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:46,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:13:46,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:46,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:13:46,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:46,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:13:46,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:46,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-11-28 03:13:46,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:46,958 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-28 03:13:46,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978372054] [2020-11-28 03:13:46,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897898818] [2020-11-28 03:13:46,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:13:46,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:46,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-28 03:13:46,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:47,118 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-28 03:13:47,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:13:47,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 15 [2020-11-28 03:13:47,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311779526] [2020-11-28 03:13:47,119 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-28 03:13:47,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:47,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1309552832, now seen corresponding path program 1 times [2020-11-28 03:13:47,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:13:47,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659971404] [2020-11-28 03:13:47,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:13:47,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:47,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:13:47,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:47,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:13:47,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:47,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:13:47,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:47,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:13:47,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:47,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-11-28 03:13:47,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:47,237 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-11-28 03:13:47,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659971404] [2020-11-28 03:13:47,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132557941] [2020-11-28 03:13:47,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:13:47,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:47,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 03:13:47,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:47,397 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-11-28 03:13:47,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:13:47,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-11-28 03:13:47,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350465844] [2020-11-28 03:13:47,398 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-28 03:13:47,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:13:47,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-28 03:13:47,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-11-28 03:13:47,399 INFO L87 Difference]: Start difference. First operand 277 states and 336 transitions. cyclomatic complexity: 64 Second operand 11 states. [2020-11-28 03:13:47,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:13:47,648 INFO L93 Difference]: Finished difference Result 321 states and 393 transitions. [2020-11-28 03:13:47,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-28 03:13:47,649 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 321 states and 393 transitions. [2020-11-28 03:13:47,652 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 28 [2020-11-28 03:13:47,656 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 321 states to 319 states and 391 transitions. [2020-11-28 03:13:47,656 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 208 [2020-11-28 03:13:47,657 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 208 [2020-11-28 03:13:47,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 319 states and 391 transitions. [2020-11-28 03:13:47,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:13:47,657 INFO L691 BuchiCegarLoop]: Abstraction has 319 states and 391 transitions. [2020-11-28 03:13:47,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states and 391 transitions. [2020-11-28 03:13:47,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 287. [2020-11-28 03:13:47,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-11-28 03:13:47,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 351 transitions. [2020-11-28 03:13:47,670 INFO L714 BuchiCegarLoop]: Abstraction has 287 states and 351 transitions. [2020-11-28 03:13:47,670 INFO L594 BuchiCegarLoop]: Abstraction has 287 states and 351 transitions. [2020-11-28 03:13:47,671 INFO L427 BuchiCegarLoop]: ======== Iteration 8============ [2020-11-28 03:13:47,671 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 287 states and 351 transitions. [2020-11-28 03:13:47,673 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 28 [2020-11-28 03:13:47,673 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:13:47,673 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:13:47,677 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:13:47,678 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:13:47,678 INFO L794 eck$LassoCheckResult]: Stem: 7838#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(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 7833#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 5; 7813#L39 call main_#t~ret11 := fibo1(main_~x~0);< 7814#fibo1ENTRY ~n := #in~n; 7880#L10 assume !(~n < 1); 7879#L12 assume !(1 == ~n); 7875#L15 call #t~ret7 := fibo2(~n - 1);< 7878#fibo2ENTRY ~n := #in~n; 7877#L20 assume !(~n < 1); 7876#L22 assume !(1 == ~n); 7865#L25 call #t~ret9 := fibo1(~n - 1);< 7867#fibo1ENTRY ~n := #in~n; 7873#L10 assume !(~n < 1); 7872#L12 assume !(1 == ~n); 7862#L15 call #t~ret7 := fibo2(~n - 1);< 7870#fibo2ENTRY ~n := #in~n; 7871#L20 assume !(~n < 1); 7993#L22 assume !(1 == ~n); 7991#L25 call #t~ret9 := fibo1(~n - 1);< 7992#fibo1ENTRY ~n := #in~n; 8004#L10 assume !(~n < 1); 7999#L12 assume 1 == ~n;#res := 1; 7994#fibo1FINAL assume true; 7990#fibo1EXIT >#48#return; 7982#L25-1 call #t~ret10 := fibo1(~n - 2);< 7983#fibo1ENTRY ~n := #in~n; 7989#L10 assume ~n < 1;#res := 0; 7988#fibo1FINAL assume true; 7981#fibo1EXIT >#50#return; 7979#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 7978#fibo2FINAL assume true; 7977#fibo2EXIT >#52#return; 7974#L15-1 call #t~ret8 := fibo2(~n - 2);< 7975#fibo2ENTRY ~n := #in~n; 8009#L20 assume !(~n < 1); 8008#L22 assume 1 == ~n;#res := 1; 8007#fibo2FINAL assume true; 7973#fibo2EXIT >#54#return; 7959#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 7956#fibo1FINAL assume true; 7954#fibo1EXIT >#48#return; 7935#L25-1 call #t~ret10 := fibo1(~n - 2);< 7942#fibo1ENTRY [2020-11-28 03:13:47,678 INFO L796 eck$LassoCheckResult]: Loop: 7942#fibo1ENTRY ~n := #in~n; 7943#L10 assume !(~n < 1); 7934#L12 assume !(1 == ~n); 7795#L15 call #t~ret7 := fibo2(~n - 1);< 7932#fibo2ENTRY ~n := #in~n; 7843#L20 assume !(~n < 1); 7794#L22 assume !(1 == ~n); 7797#L25 call #t~ret9 := fibo1(~n - 1);< 7958#fibo1ENTRY ~n := #in~n; 7976#L10 assume !(~n < 1); 7972#L12 assume !(1 == ~n); 7796#L15 call #t~ret7 := fibo2(~n - 1);< 7841#fibo2ENTRY ~n := #in~n; 7842#L20 assume !(~n < 1); 8002#L22 assume 1 == ~n;#res := 1; 7998#fibo2FINAL assume true; 7986#fibo2EXIT >#52#return; 7964#L15-1 call #t~ret8 := fibo2(~n - 2);< 7966#fibo2ENTRY ~n := #in~n; 7995#L20 assume ~n < 1;#res := 0; 7996#fibo2FINAL assume true; 8044#fibo2EXIT >#54#return; 7965#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 8043#fibo1FINAL assume true; 7952#fibo1EXIT >#48#return; 7936#L25-1 call #t~ret10 := fibo1(~n - 2);< 7942#fibo1ENTRY [2020-11-28 03:13:47,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:47,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1129557662, now seen corresponding path program 1 times [2020-11-28 03:13:47,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:13:47,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873984727] [2020-11-28 03:13:47,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:13:47,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:13:47,691 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:13:47,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:13:47,707 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:13:47,714 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:13:47,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:47,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1552659165, now seen corresponding path program 1 times [2020-11-28 03:13:47,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:13:47,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972528200] [2020-11-28 03:13:47,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:13:47,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:13:47,725 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:13:47,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:13:47,729 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:13:47,731 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:13:47,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:47,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1204019970, now seen corresponding path program 1 times [2020-11-28 03:13:47,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:13:47,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741795255] [2020-11-28 03:13:47,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:13:47,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:47,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-28 03:13:47,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:47,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:13:47,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:47,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:13:47,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:47,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:13:47,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:47,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-11-28 03:13:47,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:47,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-11-28 03:13:47,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:47,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:13:47,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:47,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:13:47,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:47,879 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-11-28 03:13:47,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741795255] [2020-11-28 03:13:47,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619223550] [2020-11-28 03:13:47,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:13:47,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:47,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-28 03:13:47,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:48,034 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 41 proven. 34 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-11-28 03:13:48,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:13:48,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 14 [2020-11-28 03:13:48,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067236584] [2020-11-28 03:13:48,262 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:13:48,262 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:13:48,262 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:13:48,262 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:13:48,263 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-28 03:13:48,263 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:48,263 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:13:48,263 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:13:48,263 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_5-1.c_Iteration8_Loop [2020-11-28 03:13:48,263 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:13:48,263 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:13:48,263 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:48,276 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:48,278 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:48,280 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:48,282 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:48,284 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:48,286 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:48,288 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:48,290 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:48,295 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:48,336 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:13:48,336 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 78 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 78 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:48,339 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:13:48,339 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:13:48,341 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:13:48,341 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret9=0} Honda state: {fibo2_#t~ret9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 79 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 79 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:48,363 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:13:48,363 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:13:48,365 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:13:48,365 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 80 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 80 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:48,387 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:13:48,387 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:13:48,389 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:13:48,389 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret8=0} Honda state: {fibo1_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 81 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 81 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:48,411 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:13:48,411 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:13:48,413 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:13:48,413 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 82 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 82 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:48,437 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:13:48,437 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:13:48,439 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:13:48,439 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#in~n=0} Honda state: {fibo2_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 83 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 83 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:48,461 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:13:48,461 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:13:48,463 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:13:48,463 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 84 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 84 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:48,485 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:13:48,485 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:13:48,487 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:13:48,487 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret10=0} Honda state: {fibo2_#t~ret10=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 85 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 85 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:48,508 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:13:48,508 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:13:48,510 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:13:48,510 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_~n=0} Honda state: {fibo2_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 86 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 86 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:48,533 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:13:48,534 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 87 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 87 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:48,557 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 03:13:48,557 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:13:48,560 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-28 03:13:48,580 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:13:48,580 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:13:48,580 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:13:48,580 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:13:48,580 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-28 03:13:48,580 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:48,580 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:13:48,580 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:13:48,580 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_5-1.c_Iteration8_Loop [2020-11-28 03:13:48,580 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:13:48,580 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:13:48,581 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:48,583 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:48,586 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:48,588 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:48,590 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:48,593 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:48,595 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:48,597 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:48,599 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:48,604 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:13:48,650 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:13:48,651 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 88 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 88 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:48,653 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 [2020-11-28 03:13:48,654 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:13:48,654 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:13:48,655 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:13:48,655 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:13:48,655 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:13:48,655 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:13:48,655 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:13:48,656 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 89 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 89 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:48,678 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 [2020-11-28 03:13:48,679 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:13:48,679 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:13:48,679 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:13:48,679 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:13:48,679 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:13:48,680 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:13:48,680 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:13:48,681 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 90 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 90 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:48,704 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 [2020-11-28 03:13:48,705 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:13:48,705 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:13:48,705 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:13:48,706 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:13:48,706 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:13:48,706 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:13:48,706 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:13:48,707 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 91 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 91 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:48,728 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 [2020-11-28 03:13:48,729 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:13:48,729 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:13:48,730 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:13:48,730 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:13:48,730 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:13:48,730 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:13:48,730 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:13:48,732 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 92 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 92 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:48,753 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 [2020-11-28 03:13:48,754 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:13:48,754 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:13:48,754 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:13:48,755 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:13:48,755 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:13:48,755 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:13:48,755 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:13:48,756 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 93 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 93 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:48,778 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 [2020-11-28 03:13:48,779 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:13:48,779 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:13:48,779 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:13:48,779 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:13:48,779 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:13:48,780 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:13:48,780 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:13:48,781 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 94 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 94 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:48,802 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 [2020-11-28 03:13:48,803 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:13:48,804 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:13:48,804 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:13:48,804 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:13:48,804 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:13:48,804 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:13:48,804 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:13:48,805 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 95 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 95 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:48,827 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 [2020-11-28 03:13:48,828 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:13:48,828 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:13:48,829 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:13:48,829 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:13:48,829 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:13:48,829 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:13:48,829 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:13:48,830 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 96 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 96 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:48,851 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 [2020-11-28 03:13:48,853 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:13:48,853 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:13:48,853 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:13:48,853 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:13:48,853 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:13:48,854 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:13:48,854 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:13:48,855 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-28 03:13:48,859 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-28 03:13:48,859 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5795cc30-488a-4f6b-abe2-7021a7ba373b/bin/uautomizer/z3 Starting monitored process 97 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 97 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:13:48,867 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-28 03:13:48,867 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-28 03:13:48,867 INFO L510 LassoAnalysis]: Proved termination. [2020-11-28 03:13:48,867 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_#in~n) = 1*fibo1_#in~n Supporting invariants [] [2020-11-28 03:13:48,887 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-28 03:13:48,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:48,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:48,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-28 03:13:48,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:48,992 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:13:48,994 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:13:48,996 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:13:48,998 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:13:49,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:49,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-28 03:13:49,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:49,211 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 03:13:49,212 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 10 loop predicates [2020-11-28 03:13:49,212 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 287 states and 351 transitions. cyclomatic complexity: 69 Second operand 12 states. [2020-11-28 03:13:49,509 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 287 states and 351 transitions. cyclomatic complexity: 69. Second operand 12 states. Result 494 states and 593 transitions. Complement of second has 16 states. [2020-11-28 03:13:49,510 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 [2020-11-28 03:13:49,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-28 03:13:49,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 42 transitions. [2020-11-28 03:13:49,511 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 42 transitions. Stem has 42 letters. Loop has 26 letters. [2020-11-28 03:13:49,511 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:13:49,511 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-28 03:13:49,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:49,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:49,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-28 03:13:49,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:49,614 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:13:49,616 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:13:49,618 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:13:49,626 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:13:49,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:49,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-28 03:13:49,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:49,812 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 03:13:49,812 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 10 loop predicates [2020-11-28 03:13:49,812 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 287 states and 351 transitions. cyclomatic complexity: 69 Second operand 12 states. [2020-11-28 03:13:50,299 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 287 states and 351 transitions. cyclomatic complexity: 69. Second operand 12 states. Result 670 states and 816 transitions. Complement of second has 41 states. [2020-11-28 03:13:50,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2020-11-28 03:13:50,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-28 03:13:50,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 58 transitions. [2020-11-28 03:13:50,309 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 58 transitions. Stem has 42 letters. Loop has 26 letters. [2020-11-28 03:13:50,309 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:13:50,309 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-28 03:13:50,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:50,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:50,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-28 03:13:50,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:50,411 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:13:50,413 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:13:50,418 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:13:50,421 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:13:50,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:50,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-28 03:13:50,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:50,619 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 03:13:50,619 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 10 loop predicates [2020-11-28 03:13:50,619 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 287 states and 351 transitions. cyclomatic complexity: 69 Second operand 12 states. [2020-11-28 03:13:50,916 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 287 states and 351 transitions. cyclomatic complexity: 69. Second operand 12 states. Result 542 states and 647 transitions. Complement of second has 15 states. [2020-11-28 03:13:50,916 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 [2020-11-28 03:13:50,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-28 03:13:50,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 46 transitions. [2020-11-28 03:13:50,918 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 46 transitions. Stem has 42 letters. Loop has 26 letters. [2020-11-28 03:13:50,922 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:13:50,922 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-28 03:13:50,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:51,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:51,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-28 03:13:51,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:51,075 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:13:51,077 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:13:51,079 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:13:51,084 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:13:51,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:51,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-28 03:13:51,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:51,320 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 03:13:51,320 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and with honda bouncer for loop.2 stem predicates 10 loop predicates [2020-11-28 03:13:51,320 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 287 states and 351 transitions. cyclomatic complexity: 69 Second operand 12 states. [2020-11-28 03:13:51,953 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 287 states and 351 transitions. cyclomatic complexity: 69. Second operand 12 states. Result 752 states and 919 transitions. Complement of second has 45 states. [2020-11-28 03:13:51,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2020-11-28 03:13:51,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-28 03:13:51,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 62 transitions. [2020-11-28 03:13:51,955 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 62 transitions. Stem has 42 letters. Loop has 26 letters. [2020-11-28 03:13:51,956 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:13:51,956 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 62 transitions. Stem has 68 letters. Loop has 26 letters. [2020-11-28 03:13:51,957 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:13:51,957 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 62 transitions. Stem has 42 letters. Loop has 52 letters. [2020-11-28 03:13:51,957 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:13:51,958 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 752 states and 919 transitions. [2020-11-28 03:13:51,966 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 46 [2020-11-28 03:13:51,973 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 752 states to 483 states and 610 transitions. [2020-11-28 03:13:51,973 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 205 [2020-11-28 03:13:51,974 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 262 [2020-11-28 03:13:51,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 483 states and 610 transitions. [2020-11-28 03:13:51,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:13:51,974 INFO L691 BuchiCegarLoop]: Abstraction has 483 states and 610 transitions. [2020-11-28 03:13:51,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states and 610 transitions. [2020-11-28 03:13:51,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 397. [2020-11-28 03:13:51,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2020-11-28 03:13:51,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 484 transitions. [2020-11-28 03:13:51,989 INFO L714 BuchiCegarLoop]: Abstraction has 397 states and 484 transitions. [2020-11-28 03:13:51,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:13:51,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-28 03:13:51,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-11-28 03:13:51,990 INFO L87 Difference]: Start difference. First operand 397 states and 484 transitions. Second operand 14 states. [2020-11-28 03:13:52,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:13:52,329 INFO L93 Difference]: Finished difference Result 180 states and 204 transitions. [2020-11-28 03:13:52,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-28 03:13:52,331 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 180 states and 204 transitions. [2020-11-28 03:13:52,333 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-28 03:13:52,333 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 180 states to 0 states and 0 transitions. [2020-11-28 03:13:52,333 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-11-28 03:13:52,333 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-11-28 03:13:52,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-11-28 03:13:52,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-28 03:13:52,334 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:13:52,334 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:13:52,334 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:13:52,334 INFO L427 BuchiCegarLoop]: ======== Iteration 9============ [2020-11-28 03:13:52,334 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-11-28 03:13:52,334 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-28 03:13:52,334 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-11-28 03:13:52,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 03:13:52 BoogieIcfgContainer [2020-11-28 03:13:52,345 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-28 03:13:52,346 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:13:52,346 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:13:52,346 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:13:52,347 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:13:32" (3/4) ... [2020-11-28 03:13:52,350 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-28 03:13:52,350 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:13:52,352 INFO L168 Benchmark]: Toolchain (without parser) took 20300.51 ms. Allocated memory was 92.3 MB in the beginning and 262.1 MB in the end (delta: 169.9 MB). Free memory was 58.3 MB in the beginning and 206.0 MB in the end (delta: -147.7 MB). Peak memory consumption was 21.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:13:52,352 INFO L168 Benchmark]: CDTParser took 0.90 ms. Allocated memory is still 92.3 MB. Free memory is still 74.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:13:52,353 INFO L168 Benchmark]: CACSL2BoogieTranslator took 264.09 ms. Allocated memory is still 92.3 MB. Free memory was 58.0 MB in the beginning and 70.0 MB in the end (delta: -12.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:13:52,355 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.92 ms. Allocated memory is still 92.3 MB. Free memory was 70.0 MB in the beginning and 68.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:13:52,356 INFO L168 Benchmark]: Boogie Preprocessor took 40.80 ms. Allocated memory is still 92.3 MB. Free memory was 68.6 MB in the beginning and 67.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:13:52,356 INFO L168 Benchmark]: RCFGBuilder took 313.93 ms. Allocated memory is still 92.3 MB. Free memory was 67.5 MB in the beginning and 55.4 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 03:13:52,359 INFO L168 Benchmark]: BuchiAutomizer took 19634.18 ms. Allocated memory was 92.3 MB in the beginning and 262.1 MB in the end (delta: 169.9 MB). Free memory was 55.4 MB in the beginning and 207.0 MB in the end (delta: -151.6 MB). Peak memory consumption was 19.9 MB. Max. memory is 16.1 GB. [2020-11-28 03:13:52,360 INFO L168 Benchmark]: Witness Printer took 4.37 ms. Allocated memory is still 262.1 MB. Free memory was 207.0 MB in the beginning and 206.0 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:13:52,362 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.90 ms. Allocated memory is still 92.3 MB. Free memory is still 74.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 264.09 ms. Allocated memory is still 92.3 MB. Free memory was 58.0 MB in the beginning and 70.0 MB in the end (delta: -12.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.92 ms. Allocated memory is still 92.3 MB. Free memory was 70.0 MB in the beginning and 68.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 40.80 ms. Allocated memory is still 92.3 MB. Free memory was 68.6 MB in the beginning and 67.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 313.93 ms. Allocated memory is still 92.3 MB. Free memory was 67.5 MB in the beginning and 55.4 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 19634.18 ms. Allocated memory was 92.3 MB in the beginning and 262.1 MB in the end (delta: 169.9 MB). Free memory was 55.4 MB in the beginning and 207.0 MB in the end (delta: -151.6 MB). Peak memory consumption was 19.9 MB. Max. memory is 16.1 GB. * Witness Printer took 4.37 ms. Allocated memory is still 262.1 MB. Free memory was 207.0 MB in the beginning and 206.0 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 12 terminating modules (7 trivial, 3 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 7 locations. One deterministic module has affine ranking function n and consists of 12 locations. One deterministic module has affine ranking function n and consists of 12 locations. One nondeterministic module has affine ranking function \old(n) and consists of 8 locations. One nondeterministic module has affine ranking function \old(n) and consists of 11 locations. 7 modules have a trivial ranking function, the largest among these consists of 14 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 19.5s and 9 iterations. TraceHistogramMax:8. Analysis of lassos took 10.3s. Construction of modules took 2.5s. Büchi inclusion checks took 6.1s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 11. Automata minimization 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 270 StatesRemovedByMinimization, 11 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had 287 states and ocurred in iteration 7. Nontrivial modules had stage [3, 0, 1, 1, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 1/19 HoareTripleCheckerStatistics: 373 SDtfs, 861 SDslu, 911 SDs, 0 SdLazy, 2367 SolverSat, 418 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.5s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT2 SILN0 SILU0 SILI3 SILT2 lasso0 LassoPreprocessingBenchmarks: Lassos: inital17 mio100 ax100 hnf84 lsp92 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq192 hnf91 smp84 dnf100 smp100 tf111 neg97 sie104 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 19ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 33 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.9s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...