./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive-simple/fibo_10-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 54858612 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/recursive-simple/fibo_10-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 483e7d170ed0643447e075c470cba29c0e69d3cf ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-5485861 [2020-10-26 05:44:14,598 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 05:44:14,602 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 05:44:14,648 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 05:44:14,649 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 05:44:14,651 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 05:44:14,653 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 05:44:14,656 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 05:44:14,659 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 05:44:14,660 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 05:44:14,662 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 05:44:14,663 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 05:44:14,664 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 05:44:14,666 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 05:44:14,667 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 05:44:14,669 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 05:44:14,670 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 05:44:14,672 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 05:44:14,674 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 05:44:14,677 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 05:44:14,679 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 05:44:14,685 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 05:44:14,687 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 05:44:14,688 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 05:44:14,696 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 05:44:14,698 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 05:44:14,700 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 05:44:14,703 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 05:44:14,706 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 05:44:14,708 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 05:44:14,709 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 05:44:14,710 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 05:44:14,713 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 05:44:14,717 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 05:44:14,720 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 05:44:14,721 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 05:44:14,722 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 05:44:14,725 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 05:44:14,725 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 05:44:14,733 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 05:44:14,734 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 05:44:14,736 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-10-26 05:44:14,795 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 05:44:14,796 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 05:44:14,800 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 05:44:14,800 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 05:44:14,800 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 05:44:14,801 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-26 05:44:14,801 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-26 05:44:14,801 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-26 05:44:14,802 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-26 05:44:14,802 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-26 05:44:14,803 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-26 05:44:14,804 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 05:44:14,804 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 05:44:14,804 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-26 05:44:14,804 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 05:44:14,805 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 05:44:14,805 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 05:44:14,805 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-26 05:44:14,805 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-26 05:44:14,806 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-26 05:44:14,806 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 05:44:14,806 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 05:44:14,807 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-26 05:44:14,807 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 05:44:14,807 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-26 05:44:14,807 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 05:44:14,808 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 05:44:14,808 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-26 05:44:14,808 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 05:44:14,809 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 05:44:14,809 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 05:44:14,809 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-26 05:44:14,811 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-26 05:44:14,811 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 483e7d170ed0643447e075c470cba29c0e69d3cf [2020-10-26 05:44:15,299 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 05:44:15,346 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 05:44:15,350 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 05:44:15,352 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 05:44:15,353 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 05:44:15,354 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_10-2.c [2020-10-26 05:44:15,469 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c2d8b6d6/a234409cc8dd45c58443549b66cf5f66/FLAG2af8990ee [2020-10-26 05:44:16,221 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 05:44:16,222 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_10-2.c [2020-10-26 05:44:16,230 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c2d8b6d6/a234409cc8dd45c58443549b66cf5f66/FLAG2af8990ee [2020-10-26 05:44:16,593 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c2d8b6d6/a234409cc8dd45c58443549b66cf5f66 [2020-10-26 05:44:16,598 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 05:44:16,606 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-26 05:44:16,608 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 05:44:16,609 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 05:44:16,613 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 05:44:16,615 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 05:44:16" (1/1) ... [2020-10-26 05:44:16,619 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22616eba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 05:44:16, skipping insertion in model container [2020-10-26 05:44:16,619 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 05:44:16" (1/1) ... [2020-10-26 05:44:16,630 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 05:44:16,645 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 05:44:16,865 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 05:44:16,879 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 05:44:16,898 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 05:44:16,916 INFO L208 MainTranslator]: Completed translation [2020-10-26 05:44:16,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 05:44:16 WrapperNode [2020-10-26 05:44:16,917 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 05:44:16,919 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-26 05:44:16,919 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-26 05:44:16,920 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-26 05:44:16,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 05:44:16" (1/1) ... [2020-10-26 05:44:16,944 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 05:44:16" (1/1) ... [2020-10-26 05:44:16,967 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-26 05:44:16,969 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 05:44:16,970 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 05:44:16,970 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 05:44:16,981 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 05:44:16" (1/1) ... [2020-10-26 05:44:16,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 05:44:16" (1/1) ... [2020-10-26 05:44:16,983 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 05:44:16" (1/1) ... [2020-10-26 05:44:16,984 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 05:44:16" (1/1) ... [2020-10-26 05:44:16,990 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 05:44:16" (1/1) ... [2020-10-26 05:44:16,993 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 05:44:16" (1/1) ... [2020-10-26 05:44:17,002 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 05:44:16" (1/1) ... [2020-10-26 05:44:17,006 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 05:44:17,008 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 05:44:17,009 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 05:44:17,009 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 05:44:17,010 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 05:44:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:17,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 05:44:17,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 05:44:17,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 05:44:17,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 05:44:17,110 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-10-26 05:44:17,110 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-10-26 05:44:17,503 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 05:44:17,503 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-26 05:44:17,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 05:44:17 BoogieIcfgContainer [2020-10-26 05:44:17,508 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 05:44:17,512 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-26 05:44:17,512 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-26 05:44:17,524 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-26 05:44:17,525 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-26 05:44:17,525 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 26.10 05:44:16" (1/3) ... [2020-10-26 05:44:17,526 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5b39e8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 26.10 05:44:17, skipping insertion in model container [2020-10-26 05:44:17,527 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-26 05:44:17,527 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 05:44:16" (2/3) ... [2020-10-26 05:44:17,527 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5b39e8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 26.10 05:44:17, skipping insertion in model container [2020-10-26 05:44:17,527 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-26 05:44:17,528 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 05:44:17" (3/3) ... [2020-10-26 05:44:17,532 INFO L373 chiAutomizerObserver]: Analyzing ICFG fibo_10-2.c [2020-10-26 05:44:17,622 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-26 05:44:17,622 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-26 05:44:17,623 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-26 05:44:17,628 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 05:44:17,628 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 05:44:17,628 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-26 05:44:17,628 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 05:44:17,629 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-26 05:44:17,646 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states. [2020-10-26 05:44:17,675 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-26 05:44:17,676 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 05:44:17,676 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 05:44:17,686 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-26 05:44:17,686 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-26 05:44:17,687 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-26 05:44:17,687 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states. [2020-10-26 05:44:17,690 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-26 05:44:17,691 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 05:44:17,691 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 05:44:17,692 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-26 05:44:17,692 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-26 05:44:17,701 INFO L794 eck$LassoCheckResult]: Stem: 13#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 11#L-1true havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 8#L27true call main_#t~ret9 := fibo(main_~x~0);< 16#fiboENTRYtrue [2020-10-26 05:44:17,702 INFO L796 eck$LassoCheckResult]: Loop: 16#fiboENTRYtrue ~n := #in~n; 14#L8true assume !(~n < 1); 18#L10true assume !(1 == ~n); 7#L13true call #t~ret7 := fibo(~n - 1);< 16#fiboENTRYtrue [2020-10-26 05:44:17,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:17,709 INFO L82 PathProgramCache]: Analyzing trace with hash 29885, now seen corresponding path program 1 times [2020-10-26 05:44:17,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 05:44:17,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12650763] [2020-10-26 05:44:17,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 05:44:17,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 05:44:17,840 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 05:44:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 05:44:17,859 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 05:44:17,884 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 05:44:17,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:17,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1512524, now seen corresponding path program 1 times [2020-10-26 05:44:17,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 05:44:17,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608222878] [2020-10-26 05:44:17,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 05:44:17,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 05:44:17,895 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 05:44:17,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 05:44:17,900 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 05:44:17,902 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 05:44:17,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:17,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1830210312, now seen corresponding path program 1 times [2020-10-26 05:44:17,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 05:44:17,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524576077] [2020-10-26 05:44:17,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 05:44:17,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 05:44:17,924 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 05:44:17,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 05:44:17,943 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 05:44:17,949 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 05:44:18,136 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 05:44:18,137 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 05:44:18,137 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 05:44:18,137 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 05:44:18,137 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-26 05:44:18,138 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:18,138 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 05:44:18,138 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 05:44:18,138 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration1_Loop [2020-10-26 05:44:18,138 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 05:44:18,138 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 05:44:18,162 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:18,170 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:18,175 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:18,181 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:18,187 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:18,296 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 05:44:18,298 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:44:18,319 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:44:18,320 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:18,335 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 05:44:18,335 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:44:18,387 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:44:18,387 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 [2020-10-26 05:44:18,393 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 05:44:18,394 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:44:18,444 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:44:18,444 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:18,451 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 05:44:18,452 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:44:18,499 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:44:18,499 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:18,507 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 05:44:18,508 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:44:18,556 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:44:18,557 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:44:18,614 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-26 05:44:18,614 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:18,707 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-26 05:44:18,710 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 05:44:18,710 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 05:44:18,710 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 05:44:18,710 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 05:44:18,710 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-26 05:44:18,711 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:18,711 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 05:44:18,711 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 05:44:18,711 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration1_Loop [2020-10-26 05:44:18,711 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 05:44:18,711 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 05:44:18,713 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:18,720 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:18,728 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:18,734 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:18,740 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:18,835 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 05:44:18,842 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:44:18,851 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 [2020-10-26 05:44:18,857 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:44:18,857 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:44:18,858 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:44:18,858 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:44:18,859 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:44:18,863 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:44:18,863 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:18,869 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:44:18,918 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-26 05:44:18,919 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:44:18,920 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:44:18,920 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:44:18,920 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:44:18,920 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:44:18,924 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:44:18,924 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:18,929 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:44:18,970 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-26 05:44:18,973 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:44:18,973 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:44:18,974 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:44:18,974 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:44:18,975 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:44:18,976 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:44:18,976 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:18,979 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:44:19,022 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-26 05:44:19,025 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:44:19,025 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:44:19,025 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:44:19,025 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:44:19,026 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:44:19,027 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:44:19,027 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:19,032 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:19,070 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-26 05:44:19,072 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:44:19,072 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:44:19,072 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:44:19,073 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:44:19,073 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:44:19,074 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:44:19,075 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 05:44:19,078 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-26 05:44:19,084 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-26 05:44:19,085 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:44:19,095 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-26 05:44:19,096 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-26 05:44:19,096 INFO L510 LassoAnalysis]: Proved termination. [2020-10-26 05:44:19,097 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:19,134 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-26 05:44:19,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:19,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:19,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-26 05:44:19,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:19,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:19,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-26 05:44:19,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:19,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 05:44:19,306 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2020-10-26 05:44:19,308 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 19 states. Second operand 4 states. [2020-10-26 05:44:19,511 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 19 states.. Second operand 4 states. Result 49 states and 61 transitions. Complement of second has 12 states. [2020-10-26 05:44:19,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-26 05:44:19,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-26 05:44:19,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2020-10-26 05:44:19,518 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2020-10-26 05:44:19,520 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:19,521 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2020-10-26 05:44:19,521 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:19,522 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2020-10-26 05:44:19,522 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:19,523 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 49 states and 61 transitions. [2020-10-26 05:44:19,529 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-26 05:44:19,538 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 49 states to 25 states and 34 transitions. [2020-10-26 05:44:19,540 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2020-10-26 05:44:19,541 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2020-10-26 05:44:19,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2020-10-26 05:44:19,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 05:44:19,542 INFO L691 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2020-10-26 05:44:19,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2020-10-26 05:44:19,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2020-10-26 05:44:19,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-26 05:44:19,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2020-10-26 05:44:19,583 INFO L714 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2020-10-26 05:44:19,583 INFO L594 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2020-10-26 05:44:19,583 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-26 05:44:19,584 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2020-10-26 05:44:19,585 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-26 05:44:19,585 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 05:44:19,586 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 05:44:19,587 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 05:44:19,587 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 05:44:19,588 INFO L794 eck$LassoCheckResult]: Stem: 132#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 130#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 128#L27 call main_#t~ret9 := fibo(main_~x~0);< 138#fiboENTRY ~n := #in~n; 136#L8 assume !(~n < 1); 137#L10 assume !(1 == ~n); 125#L13 call #t~ret7 := fibo(~n - 1);< 131#fiboENTRY ~n := #in~n; 133#L8 assume ~n < 1;#res := 0; 134#fiboFINAL assume true; 124#fiboEXIT >#35#return; 126#L13-1 [2020-10-26 05:44:19,588 INFO L796 eck$LassoCheckResult]: Loop: 126#L13-1 call #t~ret8 := fibo(~n - 2);< 129#fiboENTRY ~n := #in~n; 143#L8 assume !(~n < 1); 142#L10 assume !(1 == ~n); 127#L13 call #t~ret7 := fibo(~n - 1);< 129#fiboENTRY ~n := #in~n; 143#L8 assume ~n < 1;#res := 0; 140#fiboFINAL assume true; 141#fiboEXIT >#35#return; 126#L13-1 [2020-10-26 05:44:19,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:19,589 INFO L82 PathProgramCache]: Analyzing trace with hash 523436175, now seen corresponding path program 1 times [2020-10-26 05:44:19,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 05:44:19,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578560271] [2020-10-26 05:44:19,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 05:44:19,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:19,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 05:44:19,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:19,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 05:44:19,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578560271] [2020-10-26 05:44:19,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 05:44:19,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 05:44:19,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235646920] [2020-10-26 05:44:19,706 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-26 05:44:19,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:19,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1950983701, now seen corresponding path program 1 times [2020-10-26 05:44:19,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 05:44:19,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614112889] [2020-10-26 05:44:19,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 05:44:19,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:19,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-26 05:44:19,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:19,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 05:44:19,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614112889] [2020-10-26 05:44:19,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 05:44:19,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 05:44:19,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061749369] [2020-10-26 05:44:19,795 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-26 05:44:19,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 05:44:19,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 05:44:19,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-26 05:44:19,801 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. cyclomatic complexity: 8 Second operand 6 states. [2020-10-26 05:44:19,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 05:44:19,893 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2020-10-26 05:44:19,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 05:44:19,895 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2020-10-26 05:44:19,898 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-26 05:44:19,900 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2020-10-26 05:44:19,900 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2020-10-26 05:44:19,901 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2020-10-26 05:44:19,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2020-10-26 05:44:19,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 05:44:19,902 INFO L691 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-10-26 05:44:19,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2020-10-26 05:44:19,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-26 05:44:19,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-26 05:44:19,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2020-10-26 05:44:19,910 INFO L714 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-10-26 05:44:19,910 INFO L594 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-10-26 05:44:19,910 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-26 05:44:19,910 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2020-10-26 05:44:19,912 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-26 05:44:19,912 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 05:44:19,912 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 05:44:19,914 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 05:44:19,914 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2020-10-26 05:44:19,915 INFO L794 eck$LassoCheckResult]: Stem: 205#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 200#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 201#L27 call main_#t~ret9 := fibo(main_~x~0);< 208#fiboENTRY ~n := #in~n; 211#L8 assume !(~n < 1); 212#L10 assume !(1 == ~n); 198#L13 call #t~ret7 := fibo(~n - 1);< 204#fiboENTRY ~n := #in~n; 209#L8 assume !(~n < 1); 210#L10 assume 1 == ~n;#res := 1; 213#fiboFINAL assume true; 197#fiboEXIT >#35#return; 199#L13-1 [2020-10-26 05:44:19,915 INFO L796 eck$LassoCheckResult]: Loop: 199#L13-1 call #t~ret8 := fibo(~n - 2);< 203#fiboENTRY ~n := #in~n; 218#L8 assume !(~n < 1); 217#L10 assume !(1 == ~n); 202#L13 call #t~ret7 := fibo(~n - 1);< 203#fiboENTRY ~n := #in~n; 218#L8 assume !(~n < 1); 217#L10 assume !(1 == ~n); 202#L13 call #t~ret7 := fibo(~n - 1);< 203#fiboENTRY ~n := #in~n; 218#L8 assume !(~n < 1); 217#L10 assume 1 == ~n;#res := 1; 206#fiboFINAL assume true; 207#fiboEXIT >#35#return; 199#L13-1 call #t~ret8 := fibo(~n - 2);< 203#fiboENTRY ~n := #in~n; 218#L8 assume ~n < 1;#res := 0; 219#fiboFINAL assume true; 216#fiboEXIT >#37#return; 214#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 215#fiboFINAL assume true; 220#fiboEXIT >#35#return; 199#L13-1 [2020-10-26 05:44:19,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:19,916 INFO L82 PathProgramCache]: Analyzing trace with hash -953322862, now seen corresponding path program 1 times [2020-10-26 05:44:19,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 05:44:19,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601149043] [2020-10-26 05:44:19,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 05:44:19,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:19,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 05:44:19,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:20,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 05:44:20,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601149043] [2020-10-26 05:44:20,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134215414] [2020-10-26 05:44:20,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 05:44:20,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:20,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-26 05:44:20,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:20,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 05:44:20,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 05:44:20,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-26 05:44:20,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960545019] [2020-10-26 05:44:20,154 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-26 05:44:20,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:20,155 INFO L82 PathProgramCache]: Analyzing trace with hash -2000232554, now seen corresponding path program 1 times [2020-10-26 05:44:20,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 05:44:20,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313035289] [2020-10-26 05:44:20,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 05:44:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 05:44:20,182 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 05:44:20,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 05:44:20,199 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 05:44:20,206 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 05:44:20,485 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 05:44:20,485 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 05:44:20,485 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 05:44:20,485 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 05:44:20,486 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-26 05:44:20,486 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:20,486 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 05:44:20,486 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 05:44:20,486 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration3_Loop [2020-10-26 05:44:20,486 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 05:44:20,486 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 05:44:20,488 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:20,492 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:20,495 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:20,497 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:20,572 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 05:44:20,572 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:44:20,579 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:44:20,579 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:20,584 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 05:44:20,585 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=1} Honda state: {fibo_#t~ret7=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:44:20,625 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:44:20,625 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:20,629 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 05:44:20,630 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:20,657 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:44:20,658 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-26 05:44:20,661 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 05:44:20,661 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:20,688 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:44:20,688 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:20,734 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-26 05:44:20,735 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-26 05:44:21,641 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-26 05:44:21,644 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 05:44:21,645 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 05:44:21,645 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 05:44:21,645 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 05:44:21,645 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-26 05:44:21,645 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:21,645 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 05:44:21,646 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 05:44:21,646 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration3_Loop [2020-10-26 05:44:21,646 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 05:44:21,646 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 05:44:21,652 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:21,658 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:21,696 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:21,712 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:21,778 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 05:44:21,778 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:44:21,788 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-26 05:44:21,791 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:44:21,791 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:44:21,791 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:44:21,792 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:44:21,792 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:44:21,793 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:44:21,793 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 05:44:21,796 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:21,824 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-26 05:44:21,828 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:44:21,828 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:44:21,829 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:44:21,829 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:44:21,829 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:44:21,830 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:44:21,830 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 05:44:21,832 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:21,867 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-26 05:44:21,869 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:44:21,870 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:44:21,870 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:44:21,870 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:44:21,873 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:44:21,876 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:44:21,876 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 05:44:21,880 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-26 05:44:21,887 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-26 05:44:21,887 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:44:21,893 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-26 05:44:21,894 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-26 05:44:21,894 INFO L510 LassoAnalysis]: Proved termination. [2020-10-26 05:44:21,894 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:21,920 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-26 05:44:21,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:21,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:21,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-26 05:44:21,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:22,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:22,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-26 05:44:22,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:22,282 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 05:44:22,283 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2020-10-26 05:44:22,284 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8 Second operand 9 states. [2020-10-26 05:44:22,691 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8. Second operand 9 states. Result 159 states and 215 transitions. Complement of second has 48 states. [2020-10-26 05:44:22,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2020-10-26 05:44:22,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-26 05:44:22,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 41 transitions. [2020-10-26 05:44:22,693 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 12 letters. Loop has 22 letters. [2020-10-26 05:44:22,694 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:22,695 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 34 letters. Loop has 22 letters. [2020-10-26 05:44:22,695 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:22,696 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 12 letters. Loop has 44 letters. [2020-10-26 05:44:22,697 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:22,697 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 159 states and 215 transitions. [2020-10-26 05:44:22,708 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2020-10-26 05:44:22,716 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 159 states to 128 states and 180 transitions. [2020-10-26 05:44:22,717 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 74 [2020-10-26 05:44:22,718 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 79 [2020-10-26 05:44:22,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 128 states and 180 transitions. [2020-10-26 05:44:22,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 05:44:22,719 INFO L691 BuchiCegarLoop]: Abstraction has 128 states and 180 transitions. [2020-10-26 05:44:22,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states and 180 transitions. [2020-10-26 05:44:22,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 106. [2020-10-26 05:44:22,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-26 05:44:22,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 140 transitions. [2020-10-26 05:44:22,754 INFO L714 BuchiCegarLoop]: Abstraction has 106 states and 140 transitions. [2020-10-26 05:44:22,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 05:44:22,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 05:44:22,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-26 05:44:22,756 INFO L87 Difference]: Start difference. First operand 106 states and 140 transitions. Second operand 8 states. [2020-10-26 05:44:22,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 05:44:22,914 INFO L93 Difference]: Finished difference Result 125 states and 167 transitions. [2020-10-26 05:44:22,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 05:44:22,917 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 125 states and 167 transitions. [2020-10-26 05:44:22,928 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2020-10-26 05:44:22,937 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 125 states to 122 states and 164 transitions. [2020-10-26 05:44:22,937 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2020-10-26 05:44:22,939 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2020-10-26 05:44:22,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 164 transitions. [2020-10-26 05:44:22,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 05:44:22,941 INFO L691 BuchiCegarLoop]: Abstraction has 122 states and 164 transitions. [2020-10-26 05:44:22,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states and 164 transitions. [2020-10-26 05:44:22,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 106. [2020-10-26 05:44:22,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-26 05:44:22,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 139 transitions. [2020-10-26 05:44:22,965 INFO L714 BuchiCegarLoop]: Abstraction has 106 states and 139 transitions. [2020-10-26 05:44:22,965 INFO L594 BuchiCegarLoop]: Abstraction has 106 states and 139 transitions. [2020-10-26 05:44:22,965 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-10-26 05:44:22,965 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 106 states and 139 transitions. [2020-10-26 05:44:22,968 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2020-10-26 05:44:22,968 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 05:44:22,969 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 05:44:22,970 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 05:44:22,970 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-10-26 05:44:22,971 INFO L794 eck$LassoCheckResult]: Stem: 864#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 859#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 842#L27 call main_#t~ret9 := fibo(main_~x~0);< 873#fiboENTRY ~n := #in~n; 910#L8 assume !(~n < 1); 882#L10 assume !(1 == ~n); 862#L13 call #t~ret7 := fibo(~n - 1);< 863#fiboENTRY ~n := #in~n; 867#L8 assume !(~n < 1); 869#L10 assume !(1 == ~n); 868#L13 call #t~ret7 := fibo(~n - 1);< 863#fiboENTRY ~n := #in~n; 867#L8 assume !(~n < 1); 869#L10 assume !(1 == ~n); 868#L13 call #t~ret7 := fibo(~n - 1);< 863#fiboENTRY ~n := #in~n; 879#L8 assume !(~n < 1); 909#L10 assume 1 == ~n;#res := 1; 908#fiboFINAL assume true; 907#fiboEXIT >#35#return; 845#L13-1 call #t~ret8 := fibo(~n - 2);< 905#fiboENTRY ~n := #in~n; 912#L8 assume ~n < 1;#res := 0; 945#fiboFINAL assume true; 944#fiboEXIT >#37#return; 941#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 940#fiboFINAL assume true; 938#fiboEXIT >#35#return; 861#L13-1 [2020-10-26 05:44:22,971 INFO L796 eck$LassoCheckResult]: Loop: 861#L13-1 call #t~ret8 := fibo(~n - 2);< 843#fiboENTRY ~n := #in~n; 933#L8 assume !(~n < 1); 880#L10 assume !(1 == ~n); 860#L13 call #t~ret7 := fibo(~n - 1);< 843#fiboENTRY ~n := #in~n; 933#L8 assume !(~n < 1); 880#L10 assume 1 == ~n;#res := 1; 881#fiboFINAL assume true; 935#fiboEXIT >#35#return; 861#L13-1 [2020-10-26 05:44:22,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:22,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1335554545, now seen corresponding path program 1 times [2020-10-26 05:44:22,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 05:44:22,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015439739] [2020-10-26 05:44:22,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 05:44:22,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:23,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-26 05:44:23,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:23,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-26 05:44:23,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:23,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-26 05:44:23,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:23,143 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 05:44:23,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015439739] [2020-10-26 05:44:23,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008010281] [2020-10-26 05:44:23,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 05:44:23,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:23,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-26 05:44:23,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:23,251 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 05:44:23,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 05:44:23,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-26 05:44:23,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111647530] [2020-10-26 05:44:23,253 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-26 05:44:23,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:23,253 INFO L82 PathProgramCache]: Analyzing trace with hash 350977484, now seen corresponding path program 1 times [2020-10-26 05:44:23,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 05:44:23,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477688983] [2020-10-26 05:44:23,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 05:44:23,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 05:44:23,259 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 05:44:23,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 05:44:23,265 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 05:44:23,267 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 05:44:23,411 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 05:44:23,412 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 05:44:23,412 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 05:44:23,412 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 05:44:23,412 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-26 05:44:23,412 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:23,412 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 05:44:23,412 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 05:44:23,412 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration4_Loop [2020-10-26 05:44:23,413 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 05:44:23,413 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 05:44:23,414 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:23,417 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:23,427 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:23,432 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:23,496 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 05:44:23,497 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:44:23,508 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:44:23,508 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:23,512 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 05:44:23,512 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:23,536 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:44:23,537 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:23,566 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-26 05:44:23,567 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-26 05:44:24,809 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-26 05:44:24,812 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 05:44:24,813 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 05:44:24,813 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 05:44:24,813 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 05:44:24,813 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-26 05:44:24,813 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:24,813 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 05:44:24,813 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 05:44:24,813 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration4_Loop [2020-10-26 05:44:24,813 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 05:44:24,813 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 05:44:24,814 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:24,818 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:24,830 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:24,836 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:24,897 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 05:44:24,898 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:24,903 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 [2020-10-26 05:44:24,906 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:44:24,906 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:44:24,906 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:44:24,906 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:44:24,906 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:44:24,908 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:44:24,909 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 05:44:24,912 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:44:24,957 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-26 05:44:24,961 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:44:24,961 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:44:24,961 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:44:24,961 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:44:24,961 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:44:24,966 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:44:24,968 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:24,973 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-26 05:44:24,979 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-26 05:44:24,979 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:24,983 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-26 05:44:24,983 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-26 05:44:24,984 INFO L510 LassoAnalysis]: Proved termination. [2020-10-26 05:44:24,984 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-10-26 05:44:25,006 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-26 05:44:25,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:25,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:25,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-26 05:44:25,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:25,159 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:44:25,166 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:44:25,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:25,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-26 05:44:25,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:25,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 05:44:25,279 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2020-10-26 05:44:25,280 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38 Second operand 8 states. [2020-10-26 05:44:25,628 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38. Second operand 8 states. Result 195 states and 261 transitions. Complement of second has 33 states. [2020-10-26 05:44:25,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2020-10-26 05:44:25,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-26 05:44:25,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2020-10-26 05:44:25,629 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 28 letters. Loop has 10 letters. [2020-10-26 05:44:25,630 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:25,630 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-26 05:44:25,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:25,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:25,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-26 05:44:25,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:25,751 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:44:25,756 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:44:25,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:25,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-26 05:44:25,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:25,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 05:44:25,861 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 6 loop predicates [2020-10-26 05:44:25,861 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38 Second operand 8 states. [2020-10-26 05:44:26,111 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38. Second operand 8 states. Result 292 states and 393 transitions. Complement of second has 25 states. [2020-10-26 05:44:26,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2020-10-26 05:44:26,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-26 05:44:26,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 24 transitions. [2020-10-26 05:44:26,113 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 28 letters. Loop has 10 letters. [2020-10-26 05:44:26,114 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:26,114 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-26 05:44:26,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:26,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:26,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-26 05:44:26,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:26,244 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:44:26,249 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:44:26,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:26,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-26 05:44:26,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:26,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 05:44:26,373 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2020-10-26 05:44:26,373 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38 Second operand 8 states. [2020-10-26 05:44:26,752 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38. Second operand 8 states. Result 810 states and 1071 transitions. Complement of second has 130 states. [2020-10-26 05:44:26,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2020-10-26 05:44:26,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-26 05:44:26,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 42 transitions. [2020-10-26 05:44:26,754 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 28 letters. Loop has 10 letters. [2020-10-26 05:44:26,756 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:26,756 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 38 letters. Loop has 10 letters. [2020-10-26 05:44:26,757 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:26,757 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 28 letters. Loop has 20 letters. [2020-10-26 05:44:26,759 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:26,760 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 810 states and 1071 transitions. [2020-10-26 05:44:26,779 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2020-10-26 05:44:26,795 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 810 states to 419 states and 599 transitions. [2020-10-26 05:44:26,796 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 159 [2020-10-26 05:44:26,797 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 183 [2020-10-26 05:44:26,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 419 states and 599 transitions. [2020-10-26 05:44:26,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 05:44:26,822 INFO L691 BuchiCegarLoop]: Abstraction has 419 states and 599 transitions. [2020-10-26 05:44:26,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states and 599 transitions. [2020-10-26 05:44:26,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 332. [2020-10-26 05:44:26,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-10-26 05:44:26,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 449 transitions. [2020-10-26 05:44:26,863 INFO L714 BuchiCegarLoop]: Abstraction has 332 states and 449 transitions. [2020-10-26 05:44:26,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 05:44:26,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 05:44:26,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-26 05:44:26,864 INFO L87 Difference]: Start difference. First operand 332 states and 449 transitions. Second operand 11 states. [2020-10-26 05:44:27,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 05:44:27,213 INFO L93 Difference]: Finished difference Result 504 states and 744 transitions. [2020-10-26 05:44:27,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 05:44:27,215 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 504 states and 744 transitions. [2020-10-26 05:44:27,227 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-26 05:44:27,253 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 504 states to 502 states and 741 transitions. [2020-10-26 05:44:27,254 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 226 [2020-10-26 05:44:27,258 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 226 [2020-10-26 05:44:27,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 502 states and 741 transitions. [2020-10-26 05:44:27,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 05:44:27,259 INFO L691 BuchiCegarLoop]: Abstraction has 502 states and 741 transitions. [2020-10-26 05:44:27,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states and 741 transitions. [2020-10-26 05:44:27,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 456. [2020-10-26 05:44:27,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-10-26 05:44:27,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 677 transitions. [2020-10-26 05:44:27,315 INFO L714 BuchiCegarLoop]: Abstraction has 456 states and 677 transitions. [2020-10-26 05:44:27,315 INFO L594 BuchiCegarLoop]: Abstraction has 456 states and 677 transitions. [2020-10-26 05:44:27,315 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-10-26 05:44:27,315 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 456 states and 677 transitions. [2020-10-26 05:44:27,320 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-26 05:44:27,320 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 05:44:27,320 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 05:44:27,322 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 05:44:27,322 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-26 05:44:27,323 INFO L794 eck$LassoCheckResult]: Stem: 3811#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(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 3797#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 3798#L27 call main_#t~ret9 := fibo(main_~x~0);< 3819#fiboENTRY ~n := #in~n; 3864#L8 assume !(~n < 1); 3863#L10 assume !(1 == ~n); 3859#L13 call #t~ret7 := fibo(~n - 1);< 3861#fiboENTRY ~n := #in~n; 3862#L8 assume !(~n < 1); 3858#L10 assume !(1 == ~n); 3842#L13 call #t~ret7 := fibo(~n - 1);< 3855#fiboENTRY ~n := #in~n; 3856#L8 assume !(~n < 1); 3860#L10 assume !(1 == ~n); 3841#L13 call #t~ret7 := fibo(~n - 1);< 3855#fiboENTRY ~n := #in~n; 3857#L8 assume !(~n < 1); 3840#L10 assume 1 == ~n;#res := 1; 3843#fiboFINAL assume true; 3915#fiboEXIT >#35#return; 3909#L13-1 call #t~ret8 := fibo(~n - 2);< 3911#fiboENTRY ~n := #in~n; 4104#L8 assume !(~n < 1); 4031#L10 assume !(1 == ~n); 4032#L13 call #t~ret7 := fibo(~n - 1);< 4042#fiboENTRY ~n := #in~n; 4068#L8 assume !(~n < 1); 4049#L10 assume !(1 == ~n); 4050#L13 call #t~ret7 := fibo(~n - 1);< 4060#fiboENTRY [2020-10-26 05:44:27,323 INFO L796 eck$LassoCheckResult]: Loop: 4060#fiboENTRY ~n := #in~n; 4067#L8 assume !(~n < 1); 4066#L10 assume !(1 == ~n); 4059#L13 call #t~ret7 := fibo(~n - 1);< 4060#fiboENTRY [2020-10-26 05:44:27,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:27,323 INFO L82 PathProgramCache]: Analyzing trace with hash -777601154, now seen corresponding path program 1 times [2020-10-26 05:44:27,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 05:44:27,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266603047] [2020-10-26 05:44:27,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 05:44:27,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:27,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-26 05:44:27,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:27,521 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 05:44:27,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266603047] [2020-10-26 05:44:27,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914170638] [2020-10-26 05:44:27,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 05:44:27,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:27,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-26 05:44:27,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:27,619 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 05:44:27,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 05:44:27,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-26 05:44:27,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138882231] [2020-10-26 05:44:27,620 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-26 05:44:27,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:27,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1512524, now seen corresponding path program 2 times [2020-10-26 05:44:27,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 05:44:27,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436041691] [2020-10-26 05:44:27,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 05:44:27,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 05:44:27,625 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 05:44:27,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 05:44:27,627 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 05:44:27,628 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 05:44:27,672 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 05:44:27,672 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 05:44:27,672 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 05:44:27,672 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 05:44:27,673 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-26 05:44:27,673 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:27,673 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 05:44:27,673 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 05:44:27,673 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration5_Loop [2020-10-26 05:44:27,673 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 05:44:27,673 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 05:44:27,675 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:27,679 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:27,683 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:27,686 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:27,694 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:27,754 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 05:44:27,754 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:27,757 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:44:27,758 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-26 05:44:27,763 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 05:44:27,763 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:27,790 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:44:27,790 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-26 05:44:27,794 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 05:44:27,794 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:27,819 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:44:27,819 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-26 05:44:27,822 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 05:44:27,823 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:27,854 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:44:27,854 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:44:27,883 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-26 05:44:27,883 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:27,956 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-26 05:44:27,960 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 05:44:27,960 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 05:44:27,960 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 05:44:27,961 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 05:44:27,961 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-26 05:44:27,961 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:27,961 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 05:44:27,961 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 05:44:27,961 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration5_Loop [2020-10-26 05:44:27,961 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 05:44:27,962 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 05:44:27,963 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:27,969 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:27,972 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:27,975 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:27,978 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:28,040 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 05:44:28,041 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:28,049 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-26 05:44:28,051 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:44:28,051 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:44:28,051 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:44:28,052 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:44:28,052 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:44:28,052 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:44:28,052 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 05:44:28,054 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:28,080 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-26 05:44:28,083 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:44:28,083 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:44:28,083 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:44:28,083 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:44:28,083 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:44:28,085 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:44:28,085 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 05:44:28,089 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:28,111 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-26 05:44:28,113 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:44:28,113 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:44:28,113 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:44:28,113 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:44:28,113 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:44:28,114 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:44:28,114 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 05:44:28,115 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:28,142 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-26 05:44:28,144 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:44:28,145 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:44:28,145 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:44:28,145 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:44:28,145 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:44:28,146 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:44:28,146 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 05:44:28,148 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:28,172 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-26 05:44:28,174 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:44:28,174 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:44:28,174 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:44:28,174 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:44:28,174 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:44:28,176 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:44:28,176 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 05:44:28,178 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-26 05:44:28,189 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-26 05:44:28,190 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:28,193 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-26 05:44:28,193 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-26 05:44:28,194 INFO L510 LassoAnalysis]: Proved termination. [2020-10-26 05:44:28,194 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2020-10-26 05:44:28,217 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-26 05:44:28,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:28,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:28,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-26 05:44:28,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:28,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:28,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-26 05:44:28,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:28,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 05:44:28,373 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2020-10-26 05:44:28,373 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231 Second operand 5 states. [2020-10-26 05:44:28,510 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231. Second operand 5 states. Result 466 states and 687 transitions. Complement of second has 13 states. [2020-10-26 05:44:28,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-26 05:44:28,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-26 05:44:28,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2020-10-26 05:44:28,511 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 29 letters. Loop has 4 letters. [2020-10-26 05:44:28,511 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:28,511 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-26 05:44:28,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:28,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:28,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-26 05:44:28,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:28,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:28,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-26 05:44:28,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:28,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 05:44:28,646 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2020-10-26 05:44:28,646 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231 Second operand 5 states. [2020-10-26 05:44:28,744 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231. Second operand 5 states. Result 466 states and 687 transitions. Complement of second has 13 states. [2020-10-26 05:44:28,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-26 05:44:28,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-26 05:44:28,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2020-10-26 05:44:28,745 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 29 letters. Loop has 4 letters. [2020-10-26 05:44:28,748 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:28,748 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-26 05:44:28,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:28,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-26 05:44:28,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:28,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:28,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-26 05:44:28,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:28,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 05:44:28,897 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2020-10-26 05:44:28,897 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231 Second operand 5 states. [2020-10-26 05:44:29,034 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231. Second operand 5 states. Result 617 states and 861 transitions. Complement of second has 14 states. [2020-10-26 05:44:29,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-26 05:44:29,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-26 05:44:29,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2020-10-26 05:44:29,036 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 29 letters. Loop has 4 letters. [2020-10-26 05:44:29,036 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:29,036 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 33 letters. Loop has 4 letters. [2020-10-26 05:44:29,037 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:29,037 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 29 letters. Loop has 8 letters. [2020-10-26 05:44:29,039 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:29,039 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 617 states and 861 transitions. [2020-10-26 05:44:29,050 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-26 05:44:29,060 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 617 states to 520 states and 752 transitions. [2020-10-26 05:44:29,060 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 189 [2020-10-26 05:44:29,061 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 198 [2020-10-26 05:44:29,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 520 states and 752 transitions. [2020-10-26 05:44:29,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 05:44:29,062 INFO L691 BuchiCegarLoop]: Abstraction has 520 states and 752 transitions. [2020-10-26 05:44:29,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states and 752 transitions. [2020-10-26 05:44:29,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 490. [2020-10-26 05:44:29,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2020-10-26 05:44:29,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 716 transitions. [2020-10-26 05:44:29,087 INFO L714 BuchiCegarLoop]: Abstraction has 490 states and 716 transitions. [2020-10-26 05:44:29,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 05:44:29,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 05:44:29,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-26 05:44:29,088 INFO L87 Difference]: Start difference. First operand 490 states and 716 transitions. Second operand 12 states. [2020-10-26 05:44:29,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 05:44:29,331 INFO L93 Difference]: Finished difference Result 545 states and 810 transitions. [2020-10-26 05:44:29,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 05:44:29,332 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 545 states and 810 transitions. [2020-10-26 05:44:29,341 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-26 05:44:29,351 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 545 states to 542 states and 802 transitions. [2020-10-26 05:44:29,351 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 213 [2020-10-26 05:44:29,352 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 213 [2020-10-26 05:44:29,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 542 states and 802 transitions. [2020-10-26 05:44:29,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 05:44:29,352 INFO L691 BuchiCegarLoop]: Abstraction has 542 states and 802 transitions. [2020-10-26 05:44:29,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states and 802 transitions. [2020-10-26 05:44:29,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 511. [2020-10-26 05:44:29,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-10-26 05:44:29,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 756 transitions. [2020-10-26 05:44:29,377 INFO L714 BuchiCegarLoop]: Abstraction has 511 states and 756 transitions. [2020-10-26 05:44:29,377 INFO L594 BuchiCegarLoop]: Abstraction has 511 states and 756 transitions. [2020-10-26 05:44:29,377 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-10-26 05:44:29,377 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 511 states and 756 transitions. [2020-10-26 05:44:29,382 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-26 05:44:29,382 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 05:44:29,382 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 05:44:29,384 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [8, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 05:44:29,384 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-26 05:44:29,384 INFO L794 eck$LassoCheckResult]: Stem: 7334#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 7329#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 7325#L27 call main_#t~ret9 := fibo(main_~x~0);< 7347#fiboENTRY ~n := #in~n; 7348#L8 assume !(~n < 1); 7391#L10 assume !(1 == ~n); 7383#L13 call #t~ret7 := fibo(~n - 1);< 7384#fiboENTRY ~n := #in~n; 7393#L8 assume !(~n < 1); 7392#L10 assume !(1 == ~n); 7376#L13 call #t~ret7 := fibo(~n - 1);< 7388#fiboENTRY ~n := #in~n; 7387#L8 assume !(~n < 1); 7386#L10 assume !(1 == ~n); 7380#L13 call #t~ret7 := fibo(~n - 1);< 7385#fiboENTRY ~n := #in~n; 7515#L8 assume !(~n < 1); 7426#L10 assume !(1 == ~n); 7379#L13 call #t~ret7 := fibo(~n - 1);< 7385#fiboENTRY ~n := #in~n; 7493#L8 assume !(~n < 1); 7491#L10 assume 1 == ~n;#res := 1; 7487#fiboFINAL assume true; 7463#fiboEXIT >#35#return; 7448#L13-1 call #t~ret8 := fibo(~n - 2);< 7451#fiboENTRY ~n := #in~n; 7744#L8 assume !(~n < 1); 7741#L10 assume !(1 == ~n); 7351#L13 call #t~ret7 := fibo(~n - 1);< 7358#fiboENTRY ~n := #in~n; 7359#L8 assume !(~n < 1); 7794#L10 assume !(1 == ~n); 7363#L13 call #t~ret7 := fibo(~n - 1);< 7360#fiboENTRY ~n := #in~n; 7365#L8 assume !(~n < 1); 7374#L10 assume !(1 == ~n); 7362#L13 [2020-10-26 05:44:29,384 INFO L796 eck$LassoCheckResult]: Loop: 7362#L13 call #t~ret7 := fibo(~n - 1);< 7360#fiboENTRY ~n := #in~n; 7365#L8 assume !(~n < 1); 7374#L10 assume !(1 == ~n); 7362#L13 [2020-10-26 05:44:29,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:29,385 INFO L82 PathProgramCache]: Analyzing trace with hash 42869646, now seen corresponding path program 2 times [2020-10-26 05:44:29,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 05:44:29,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750885233] [2020-10-26 05:44:29,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 05:44:29,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:29,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-26 05:44:29,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:29,509 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 53 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-26 05:44:29,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750885233] [2020-10-26 05:44:29,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121043205] [2020-10-26 05:44:29,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 05:44:29,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-26 05:44:29,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 05:44:29,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-26 05:44:29,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:29,599 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 53 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-26 05:44:29,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 05:44:29,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-26 05:44:29,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338704255] [2020-10-26 05:44:29,600 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-26 05:44:29,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:29,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 3 times [2020-10-26 05:44:29,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 05:44:29,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588508456] [2020-10-26 05:44:29,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 05:44:29,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 05:44:29,604 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 05:44:29,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 05:44:29,605 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 05:44:29,606 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 05:44:29,655 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 05:44:29,655 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 05:44:29,655 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 05:44:29,655 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 05:44:29,655 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-26 05:44:29,655 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:29,656 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 05:44:29,656 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 05:44:29,656 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration6_Loop [2020-10-26 05:44:29,656 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 05:44:29,656 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 05:44:29,657 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:29,660 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:29,662 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:29,674 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:29,740 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 05:44:29,740 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:29,751 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:44:29,751 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-26 05:44:29,755 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 05:44:29,755 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:44:29,796 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:44:29,796 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-26 05:44:29,807 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 05:44:29,807 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:29,839 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:44:29,839 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:44:29,888 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-26 05:44:29,888 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:37,028 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-26 05:44:37,031 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 05:44:37,031 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 05:44:37,032 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 05:44:37,032 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 05:44:37,032 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-26 05:44:37,032 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:37,032 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 05:44:37,032 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 05:44:37,032 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration6_Loop [2020-10-26 05:44:37,032 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 05:44:37,032 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 05:44:37,033 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:37,038 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:37,041 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:37,054 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:37,126 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 05:44:37,127 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:37,132 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-26 05:44:37,134 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:44:37,134 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:44:37,134 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:44:37,134 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:44:37,134 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:44:37,135 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:44:37,135 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 05:44:37,136 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:37,161 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-26 05:44:37,163 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:44:37,163 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:44:37,163 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:44:37,163 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:44:37,163 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:44:37,163 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:44:37,163 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 05:44:37,165 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:37,188 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-26 05:44:37,189 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:44:37,189 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:44:37,189 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:44:37,189 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:44:37,189 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:44:37,190 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:44:37,191 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 05:44:37,193 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-26 05:44:37,195 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-26 05:44:37,195 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:44:37,198 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-26 05:44:37,198 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-26 05:44:37,199 INFO L510 LassoAnalysis]: Proved termination. [2020-10-26 05:44:37,199 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:37,219 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-26 05:44:37,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:37,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:37,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-26 05:44:37,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:37,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:37,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-26 05:44:37,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:37,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 05:44:37,376 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-26 05:44:37,376 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 511 states and 756 transitions. cyclomatic complexity: 255 Second operand 6 states. [2020-10-26 05:44:37,501 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 511 states and 756 transitions. cyclomatic complexity: 255. Second operand 6 states. Result 523 states and 769 transitions. Complement of second has 18 states. [2020-10-26 05:44:37,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-26 05:44:37,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-26 05:44:37,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-10-26 05:44:37,503 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 36 letters. Loop has 4 letters. [2020-10-26 05:44:37,503 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:37,503 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-26 05:44:37,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:37,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:37,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-26 05:44:37,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:37,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:37,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-26 05:44:37,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:37,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 05:44:37,661 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-26 05:44:37,661 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 511 states and 756 transitions. cyclomatic complexity: 255 Second operand 6 states. [2020-10-26 05:44:37,796 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 511 states and 756 transitions. cyclomatic complexity: 255. Second operand 6 states. Result 753 states and 1085 transitions. Complement of second has 22 states. [2020-10-26 05:44:37,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2020-10-26 05:44:37,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-26 05:44:37,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-10-26 05:44:37,797 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 36 letters. Loop has 4 letters. [2020-10-26 05:44:37,797 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:37,798 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 40 letters. Loop has 4 letters. [2020-10-26 05:44:37,798 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:37,798 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 36 letters. Loop has 8 letters. [2020-10-26 05:44:37,798 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:37,798 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 753 states and 1085 transitions. [2020-10-26 05:44:37,811 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-26 05:44:37,825 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 753 states to 689 states and 1016 transitions. [2020-10-26 05:44:37,825 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 233 [2020-10-26 05:44:37,826 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 261 [2020-10-26 05:44:37,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 689 states and 1016 transitions. [2020-10-26 05:44:37,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 05:44:37,829 INFO L691 BuchiCegarLoop]: Abstraction has 689 states and 1016 transitions. [2020-10-26 05:44:37,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states and 1016 transitions. [2020-10-26 05:44:37,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 672. [2020-10-26 05:44:37,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 672 states. [2020-10-26 05:44:37,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 991 transitions. [2020-10-26 05:44:37,858 INFO L714 BuchiCegarLoop]: Abstraction has 672 states and 991 transitions. [2020-10-26 05:44:37,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 05:44:37,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 05:44:37,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-26 05:44:37,863 INFO L87 Difference]: Start difference. First operand 672 states and 991 transitions. Second operand 14 states. [2020-10-26 05:44:38,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 05:44:38,185 INFO L93 Difference]: Finished difference Result 735 states and 1085 transitions. [2020-10-26 05:44:38,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 05:44:38,186 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 735 states and 1085 transitions. [2020-10-26 05:44:38,199 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-26 05:44:38,212 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 735 states to 725 states and 1070 transitions. [2020-10-26 05:44:38,212 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 268 [2020-10-26 05:44:38,213 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 268 [2020-10-26 05:44:38,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 725 states and 1070 transitions. [2020-10-26 05:44:38,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 05:44:38,213 INFO L691 BuchiCegarLoop]: Abstraction has 725 states and 1070 transitions. [2020-10-26 05:44:38,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states and 1070 transitions. [2020-10-26 05:44:38,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 712. [2020-10-26 05:44:38,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-10-26 05:44:38,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1045 transitions. [2020-10-26 05:44:38,253 INFO L714 BuchiCegarLoop]: Abstraction has 712 states and 1045 transitions. [2020-10-26 05:44:38,253 INFO L594 BuchiCegarLoop]: Abstraction has 712 states and 1045 transitions. [2020-10-26 05:44:38,253 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-10-26 05:44:38,253 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 712 states and 1045 transitions. [2020-10-26 05:44:38,260 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-26 05:44:38,260 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 05:44:38,260 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 05:44:38,264 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [10, 9, 8, 7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 05:44:38,264 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-26 05:44:38,264 INFO L794 eck$LassoCheckResult]: Stem: 10978#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(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 10969#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 10970#L27 call main_#t~ret9 := fibo(main_~x~0);< 10986#fiboENTRY ~n := #in~n; 11071#L8 assume !(~n < 1); 11069#L10 assume !(1 == ~n); 11066#L13 call #t~ret7 := fibo(~n - 1);< 11067#fiboENTRY ~n := #in~n; 11101#L8 assume !(~n < 1); 11100#L10 assume !(1 == ~n); 11078#L13 call #t~ret7 := fibo(~n - 1);< 11081#fiboENTRY ~n := #in~n; 11099#L8 assume !(~n < 1); 11083#L10 assume !(1 == ~n); 11073#L13 call #t~ret7 := fibo(~n - 1);< 11079#fiboENTRY ~n := #in~n; 11110#L8 assume !(~n < 1); 11109#L10 assume !(1 == ~n); 11095#L13 call #t~ret7 := fibo(~n - 1);< 11108#fiboENTRY ~n := #in~n; 11141#L8 assume !(~n < 1); 11130#L10 assume !(1 == ~n); 11096#L13 call #t~ret7 := fibo(~n - 1);< 11129#fiboENTRY ~n := #in~n; 11174#L8 assume !(~n < 1); 11161#L10 assume 1 == ~n;#res := 1; 11158#fiboFINAL assume true; 11156#fiboEXIT >#35#return; 11136#L13-1 call #t~ret8 := fibo(~n - 2);< 11138#fiboENTRY ~n := #in~n; 11152#L8 assume ~n < 1;#res := 0; 11149#fiboFINAL assume true; 11135#fiboEXIT >#37#return; 11134#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 11128#fiboFINAL assume true; 11107#fiboEXIT >#35#return; 11091#L13-1 call #t~ret8 := fibo(~n - 2);< 11098#fiboENTRY ~n := #in~n; 11159#L8 assume !(~n < 1); 11120#L10 assume !(1 == ~n); 11122#L13 call #t~ret7 := fibo(~n - 1);< 11148#fiboENTRY ~n := #in~n; 11320#L8 assume !(~n < 1); 11318#L10 assume !(1 == ~n); 11304#L13 call #t~ret7 := fibo(~n - 1);< 11314#fiboENTRY ~n := #in~n; 11397#L8 assume !(~n < 1); 11396#L10 assume !(1 == ~n); 11305#L13 [2020-10-26 05:44:38,264 INFO L796 eck$LassoCheckResult]: Loop: 11305#L13 call #t~ret7 := fibo(~n - 1);< 11314#fiboENTRY ~n := #in~n; 11397#L8 assume !(~n < 1); 11396#L10 assume !(1 == ~n); 11305#L13 [2020-10-26 05:44:38,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:38,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1891219752, now seen corresponding path program 2 times [2020-10-26 05:44:38,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 05:44:38,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881682571] [2020-10-26 05:44:38,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 05:44:38,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:38,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-26 05:44:38,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:38,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-26 05:44:38,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:38,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-26 05:44:38,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:38,480 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 73 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-26 05:44:38,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881682571] [2020-10-26 05:44:38,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763098121] [2020-10-26 05:44:38,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 05:44:38,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-26 05:44:38,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 05:44:38,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-26 05:44:38,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:38,580 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 73 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-26 05:44:38,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 05:44:38,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-26 05:44:38,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005946562] [2020-10-26 05:44:38,583 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-26 05:44:38,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:38,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 4 times [2020-10-26 05:44:38,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 05:44:38,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549648691] [2020-10-26 05:44:38,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 05:44:38,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 05:44:38,588 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 05:44:38,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 05:44:38,590 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 05:44:38,591 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 05:44:38,655 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 05:44:38,655 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 05:44:38,655 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 05:44:38,655 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 05:44:38,655 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-26 05:44:38,655 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:38,655 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 05:44:38,656 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 05:44:38,656 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration7_Loop [2020-10-26 05:44:38,656 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 05:44:38,656 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 05:44:38,657 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:38,668 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:38,671 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:38,674 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:38,723 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 05:44:38,724 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:44:38,733 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:44:38,733 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:38,771 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-26 05:44:38,771 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-26 05:44:40,144 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-26 05:44:40,146 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 05:44:40,146 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 05:44:40,146 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 05:44:40,146 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 05:44:40,146 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-26 05:44:40,146 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:40,146 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 05:44:40,146 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 05:44:40,146 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration7_Loop [2020-10-26 05:44:40,146 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 05:44:40,147 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 05:44:40,148 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:40,150 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:40,152 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:40,155 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:40,227 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 05:44:40,228 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:40,230 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-26 05:44:40,232 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:44:40,232 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:44:40,232 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:44:40,232 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:44:40,232 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:44:40,233 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:44:40,233 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 05:44:40,234 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:40,262 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-26 05:44:40,263 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:44:40,263 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:44:40,263 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:44:40,263 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:44:40,264 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:44:40,264 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:44:40,264 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 05:44:40,265 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:40,289 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-26 05:44:40,291 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:44:40,291 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:44:40,291 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:44:40,291 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:44:40,291 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:44:40,292 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:44:40,292 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 05:44:40,293 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:40,318 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-26 05:44:40,319 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:44:40,319 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:44:40,319 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:44:40,319 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:44:40,320 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:44:40,321 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:44:40,322 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 05:44:40,324 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-26 05:44:40,326 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-26 05:44:40,327 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:40,337 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-26 05:44:40,337 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-26 05:44:40,337 INFO L510 LassoAnalysis]: Proved termination. [2020-10-26 05:44:40,337 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-10-26 05:44:40,359 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-26 05:44:40,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:40,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:40,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-26 05:44:40,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:40,485 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:44:40,488 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:44:40,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:40,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-26 05:44:40,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:40,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 05:44:40,541 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-26 05:44:40,541 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346 Second operand 6 states. [2020-10-26 05:44:40,636 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346. Second operand 6 states. Result 731 states and 1065 transitions. Complement of second has 18 states. [2020-10-26 05:44:40,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-26 05:44:40,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-26 05:44:40,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-10-26 05:44:40,638 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 48 letters. Loop has 4 letters. [2020-10-26 05:44:40,638 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:40,638 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-26 05:44:40,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:40,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:40,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-26 05:44:40,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:40,796 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:44:40,801 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:44:40,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:40,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-26 05:44:40,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:40,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 05:44:40,862 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-26 05:44:40,862 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346 Second operand 6 states. [2020-10-26 05:44:40,994 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346. Second operand 6 states. Result 916 states and 1284 transitions. Complement of second has 22 states. [2020-10-26 05:44:40,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2020-10-26 05:44:40,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-26 05:44:40,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-10-26 05:44:40,995 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 48 letters. Loop has 4 letters. [2020-10-26 05:44:40,996 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:40,996 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-26 05:44:41,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:41,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:41,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-26 05:44:41,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:41,115 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:44:41,120 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:44:41,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:41,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-26 05:44:41,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:41,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 05:44:41,179 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 4 loop predicates [2020-10-26 05:44:41,179 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346 Second operand 6 states. [2020-10-26 05:44:41,291 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346. Second operand 6 states. Result 959 states and 1365 transitions. Complement of second has 27 states. [2020-10-26 05:44:41,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-26 05:44:41,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-26 05:44:41,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2020-10-26 05:44:41,292 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 48 letters. Loop has 4 letters. [2020-10-26 05:44:41,293 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:41,294 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 52 letters. Loop has 4 letters. [2020-10-26 05:44:41,294 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:41,294 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 48 letters. Loop has 8 letters. [2020-10-26 05:44:41,294 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:41,295 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 959 states and 1365 transitions. [2020-10-26 05:44:41,306 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-26 05:44:41,317 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 959 states to 712 states and 1045 transitions. [2020-10-26 05:44:41,317 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 216 [2020-10-26 05:44:41,319 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 252 [2020-10-26 05:44:41,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 712 states and 1045 transitions. [2020-10-26 05:44:41,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 05:44:41,319 INFO L691 BuchiCegarLoop]: Abstraction has 712 states and 1045 transitions. [2020-10-26 05:44:41,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states and 1045 transitions. [2020-10-26 05:44:41,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 712. [2020-10-26 05:44:41,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-10-26 05:44:41,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1045 transitions. [2020-10-26 05:44:41,345 INFO L714 BuchiCegarLoop]: Abstraction has 712 states and 1045 transitions. [2020-10-26 05:44:41,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 05:44:41,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 05:44:41,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-26 05:44:41,346 INFO L87 Difference]: Start difference. First operand 712 states and 1045 transitions. Second operand 15 states. [2020-10-26 05:44:41,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 05:44:41,737 INFO L93 Difference]: Finished difference Result 777 states and 1127 transitions. [2020-10-26 05:44:41,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 05:44:41,737 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 777 states and 1127 transitions. [2020-10-26 05:44:41,747 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-26 05:44:41,763 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 777 states to 777 states and 1127 transitions. [2020-10-26 05:44:41,763 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 291 [2020-10-26 05:44:41,765 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 291 [2020-10-26 05:44:41,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 777 states and 1127 transitions. [2020-10-26 05:44:41,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 05:44:41,766 INFO L691 BuchiCegarLoop]: Abstraction has 777 states and 1127 transitions. [2020-10-26 05:44:41,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states and 1127 transitions. [2020-10-26 05:44:41,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 736. [2020-10-26 05:44:41,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2020-10-26 05:44:41,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1081 transitions. [2020-10-26 05:44:41,795 INFO L714 BuchiCegarLoop]: Abstraction has 736 states and 1081 transitions. [2020-10-26 05:44:41,796 INFO L594 BuchiCegarLoop]: Abstraction has 736 states and 1081 transitions. [2020-10-26 05:44:41,796 INFO L427 BuchiCegarLoop]: ======== Iteration 8============ [2020-10-26 05:44:41,796 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 736 states and 1081 transitions. [2020-10-26 05:44:41,802 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-26 05:44:41,802 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 05:44:41,802 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 05:44:41,807 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [13, 12, 10, 9, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-10-26 05:44:41,807 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-26 05:44:41,809 INFO L794 eck$LassoCheckResult]: Stem: 16565#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(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 16555#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 16556#L27 call main_#t~ret9 := fibo(main_~x~0);< 16581#fiboENTRY ~n := #in~n; 16655#L8 assume !(~n < 1); 16654#L10 assume !(1 == ~n); 16650#L13 call #t~ret7 := fibo(~n - 1);< 16653#fiboENTRY ~n := #in~n; 16652#L8 assume !(~n < 1); 16651#L10 assume !(1 == ~n); 16646#L13 call #t~ret7 := fibo(~n - 1);< 16649#fiboENTRY ~n := #in~n; 16648#L8 assume !(~n < 1); 16647#L10 assume !(1 == ~n); 16639#L13 call #t~ret7 := fibo(~n - 1);< 16645#fiboENTRY ~n := #in~n; 16643#L8 assume !(~n < 1); 16641#L10 assume !(1 == ~n); 16627#L13 call #t~ret7 := fibo(~n - 1);< 16632#fiboENTRY ~n := #in~n; 16637#L8 assume !(~n < 1); 16635#L10 assume !(1 == ~n); 16626#L13 call #t~ret7 := fibo(~n - 1);< 16632#fiboENTRY ~n := #in~n; 16638#L8 assume !(~n < 1); 16636#L10 assume 1 == ~n;#res := 1; 16633#fiboFINAL assume true; 16625#fiboEXIT >#35#return; 16622#L13-1 call #t~ret8 := fibo(~n - 2);< 16621#fiboENTRY ~n := #in~n; 16623#L8 assume !(~n < 1); 16800#L10 assume !(1 == ~n); 16618#L13 call #t~ret7 := fibo(~n - 1);< 16629#fiboENTRY ~n := #in~n; 16644#L8 assume !(~n < 1); 17177#L10 assume !(1 == ~n); 16574#L13 call #t~ret7 := fibo(~n - 1);< 17212#fiboENTRY ~n := #in~n; 17254#L8 assume !(~n < 1); 17253#L10 assume 1 == ~n;#res := 1; 17216#fiboFINAL assume true; 17211#fiboEXIT >#35#return; 16933#L13-1 call #t~ret8 := fibo(~n - 2);< 16936#fiboENTRY ~n := #in~n; 17208#L8 assume ~n < 1;#res := 0; 17205#fiboFINAL assume true; 16931#fiboEXIT >#37#return; 16822#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 16821#fiboFINAL assume true; 16801#fiboEXIT >#35#return; 16746#L13-1 call #t~ret8 := fibo(~n - 2);< 16754#fiboENTRY ~n := #in~n; 16812#L8 assume !(~n < 1); 16807#L10 assume !(1 == ~n); 16809#L13 call #t~ret7 := fibo(~n - 1);< 16834#fiboENTRY ~n := #in~n; 16891#L8 assume !(~n < 1); 17022#L10 assume !(1 == ~n); 16925#L13 call #t~ret7 := fibo(~n - 1);< 16929#fiboENTRY ~n := #in~n; 16967#L8 assume !(~n < 1); 16966#L10 assume !(1 == ~n); 16926#L13 [2020-10-26 05:44:41,810 INFO L796 eck$LassoCheckResult]: Loop: 16926#L13 call #t~ret7 := fibo(~n - 1);< 16929#fiboENTRY ~n := #in~n; 16967#L8 assume !(~n < 1); 16966#L10 assume !(1 == ~n); 16926#L13 [2020-10-26 05:44:41,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:41,810 INFO L82 PathProgramCache]: Analyzing trace with hash 167551224, now seen corresponding path program 3 times [2020-10-26 05:44:41,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 05:44:41,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977976468] [2020-10-26 05:44:41,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 05:44:41,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:41,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-26 05:44:41,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:42,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-26 05:44:42,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:42,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-26 05:44:42,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:42,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-26 05:44:42,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:42,021 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 114 proven. 121 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-26 05:44:42,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977976468] [2020-10-26 05:44:42,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453194792] [2020-10-26 05:44:42,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 05:44:42,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-26 05:44:42,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 05:44:42,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-26 05:44:42,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:42,241 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 141 proven. 19 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-10-26 05:44:42,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 05:44:42,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2020-10-26 05:44:42,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767952148] [2020-10-26 05:44:42,243 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-26 05:44:42,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:42,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 5 times [2020-10-26 05:44:42,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 05:44:42,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675504101] [2020-10-26 05:44:42,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 05:44:42,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 05:44:42,247 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 05:44:42,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 05:44:42,251 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 05:44:42,255 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 05:44:42,316 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 05:44:42,316 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 05:44:42,316 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 05:44:42,316 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 05:44:42,316 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-26 05:44:42,316 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:42,316 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 05:44:42,316 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 05:44:42,317 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration8_Loop [2020-10-26 05:44:42,317 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 05:44:42,317 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 05:44:42,317 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:42,321 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:42,324 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:42,334 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:42,404 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 05:44:42,404 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:44:42,415 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:44:42,415 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:42,425 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 05:44:42,425 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-26 05:44:42,447 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:44:42,448 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-26 05:44:42,450 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 05:44:42,450 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-26 05:44:42,473 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:44:42,473 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-26 05:44:42,500 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-26 05:44:42,500 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-26 05:44:43,854 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-26 05:44:43,856 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 05:44:43,856 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 05:44:43,857 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 05:44:43,857 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 05:44:43,857 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-26 05:44:43,857 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:43,857 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 05:44:43,857 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 05:44:43,857 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration8_Loop [2020-10-26 05:44:43,857 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 05:44:43,857 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 05:44:43,858 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:43,861 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:43,864 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:43,874 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:43,949 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 05:44:43,949 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:44:43,953 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-26 05:44:43,955 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:44:43,955 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:44:43,955 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:44:43,955 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:44:43,955 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:44:43,957 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:44:43,957 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:43,959 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-26 05:44:43,988 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-26 05:44:43,989 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:44:43,990 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:44:43,990 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:44:43,990 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:44:43,990 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:44:43,990 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:44:43,990 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 05:44:43,992 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:44:44,015 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false Waiting until toolchain timeout for monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:44,017 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:44:44,017 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:44:44,017 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:44:44,018 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:44:44,018 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:44:44,018 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:44:44,019 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 05:44:44,021 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-26 05:44:44,023 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-26 05:44:44,023 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 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 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:44,026 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-26 05:44:44,026 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-26 05:44:44,026 INFO L510 LassoAnalysis]: Proved termination. [2020-10-26 05:44:44,026 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-10-26 05:44:44,047 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-26 05:44:44,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:44,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:44,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-26 05:44:44,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:44,192 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:44:44,194 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:44:44,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:44,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-26 05:44:44,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 05:44:44,244 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-26 05:44:44,245 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 736 states and 1081 transitions. cyclomatic complexity: 358 Second operand 6 states. [2020-10-26 05:44:44,322 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 736 states and 1081 transitions. cyclomatic complexity: 358. Second operand 6 states. Result 755 states and 1101 transitions. Complement of second has 18 states. [2020-10-26 05:44:44,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-26 05:44:44,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-26 05:44:44,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-10-26 05:44:44,323 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 62 letters. Loop has 4 letters. [2020-10-26 05:44:44,324 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:44,324 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-26 05:44:44,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:44,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:44,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-26 05:44:44,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:44,476 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:44:44,479 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:44:44,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:44,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-26 05:44:44,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:44,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 05:44:44,531 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-26 05:44:44,532 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 736 states and 1081 transitions. cyclomatic complexity: 358 Second operand 6 states. [2020-10-26 05:44:44,652 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 736 states and 1081 transitions. cyclomatic complexity: 358. Second operand 6 states. Result 940 states and 1320 transitions. Complement of second has 22 states. [2020-10-26 05:44:44,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2020-10-26 05:44:44,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-26 05:44:44,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-10-26 05:44:44,654 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 62 letters. Loop has 4 letters. [2020-10-26 05:44:44,654 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:44,654 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-26 05:44:44,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:44,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:44,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-26 05:44:44,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:44,787 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:44:44,789 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:44:44,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:44,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-26 05:44:44,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:44,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 05:44:44,839 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 4 loop predicates [2020-10-26 05:44:44,839 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 736 states and 1081 transitions. cyclomatic complexity: 358 Second operand 6 states. [2020-10-26 05:44:44,948 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 736 states and 1081 transitions. cyclomatic complexity: 358. Second operand 6 states. Result 983 states and 1401 transitions. Complement of second has 27 states. [2020-10-26 05:44:44,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-26 05:44:44,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-26 05:44:44,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2020-10-26 05:44:44,950 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 62 letters. Loop has 4 letters. [2020-10-26 05:44:44,952 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:44,952 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 66 letters. Loop has 4 letters. [2020-10-26 05:44:44,953 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:44,953 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 62 letters. Loop has 8 letters. [2020-10-26 05:44:44,954 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:44,955 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 983 states and 1401 transitions. [2020-10-26 05:44:44,966 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-26 05:44:44,977 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 983 states to 736 states and 1081 transitions. [2020-10-26 05:44:44,977 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 231 [2020-10-26 05:44:44,978 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 267 [2020-10-26 05:44:44,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 736 states and 1081 transitions. [2020-10-26 05:44:44,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 05:44:44,978 INFO L691 BuchiCegarLoop]: Abstraction has 736 states and 1081 transitions. [2020-10-26 05:44:44,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states and 1081 transitions. [2020-10-26 05:44:45,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 736. [2020-10-26 05:44:45,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2020-10-26 05:44:45,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1081 transitions. [2020-10-26 05:44:45,009 INFO L714 BuchiCegarLoop]: Abstraction has 736 states and 1081 transitions. [2020-10-26 05:44:45,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 05:44:45,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 05:44:45,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2020-10-26 05:44:45,010 INFO L87 Difference]: Start difference. First operand 736 states and 1081 transitions. Second operand 23 states. [2020-10-26 05:44:45,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 05:44:45,666 INFO L93 Difference]: Finished difference Result 456 states and 590 transitions. [2020-10-26 05:44:45,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 05:44:45,667 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 456 states and 590 transitions. [2020-10-26 05:44:45,673 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-10-26 05:44:45,679 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 456 states to 384 states and 507 transitions. [2020-10-26 05:44:45,679 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 165 [2020-10-26 05:44:45,680 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 184 [2020-10-26 05:44:45,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 384 states and 507 transitions. [2020-10-26 05:44:45,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 05:44:45,680 INFO L691 BuchiCegarLoop]: Abstraction has 384 states and 507 transitions. [2020-10-26 05:44:45,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states and 507 transitions. [2020-10-26 05:44:45,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 318. [2020-10-26 05:44:45,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-10-26 05:44:45,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 425 transitions. [2020-10-26 05:44:45,697 INFO L714 BuchiCegarLoop]: Abstraction has 318 states and 425 transitions. [2020-10-26 05:44:45,698 INFO L594 BuchiCegarLoop]: Abstraction has 318 states and 425 transitions. [2020-10-26 05:44:45,698 INFO L427 BuchiCegarLoop]: ======== Iteration 9============ [2020-10-26 05:44:45,698 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 318 states and 425 transitions. [2020-10-26 05:44:45,700 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-10-26 05:44:45,700 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 05:44:45,701 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 05:44:45,702 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [14, 13, 11, 10, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2020-10-26 05:44:45,703 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-26 05:44:45,704 INFO L794 eck$LassoCheckResult]: Stem: 22131#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(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 22122#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 22123#L27 call main_#t~ret9 := fibo(main_~x~0);< 22144#fiboENTRY ~n := #in~n; 22237#L8 assume !(~n < 1); 22235#L10 assume !(1 == ~n); 22215#L13 call #t~ret7 := fibo(~n - 1);< 22230#fiboENTRY ~n := #in~n; 22224#L8 assume !(~n < 1); 22221#L10 assume !(1 == ~n); 22217#L13 call #t~ret7 := fibo(~n - 1);< 22218#fiboENTRY ~n := #in~n; 22272#L8 assume !(~n < 1); 22271#L10 assume !(1 == ~n); 22232#L13 call #t~ret7 := fibo(~n - 1);< 22234#fiboENTRY ~n := #in~n; 22241#L8 assume !(~n < 1); 22240#L10 assume !(1 == ~n); 22227#L13 call #t~ret7 := fibo(~n - 1);< 22239#fiboENTRY ~n := #in~n; 22257#L8 assume !(~n < 1); 22254#L10 assume !(1 == ~n); 22111#L13 call #t~ret7 := fibo(~n - 1);< 22250#fiboENTRY ~n := #in~n; 22355#L8 assume !(~n < 1); 22354#L10 assume !(1 == ~n); 22112#L13 call #t~ret7 := fibo(~n - 1);< 22250#fiboENTRY ~n := #in~n; 22355#L8 assume !(~n < 1); 22354#L10 assume !(1 == ~n); 22112#L13 call #t~ret7 := fibo(~n - 1);< 22250#fiboENTRY ~n := #in~n; 22355#L8 assume !(~n < 1); 22354#L10 assume !(1 == ~n); 22112#L13 call #t~ret7 := fibo(~n - 1);< 22277#fiboENTRY ~n := #in~n; 22410#L8 assume !(~n < 1); 22409#L10 assume 1 == ~n;#res := 1; 22408#fiboFINAL assume true; 22407#fiboEXIT >#35#return; 22110#L13-1 call #t~ret8 := fibo(~n - 2);< 22113#fiboENTRY ~n := #in~n; 22418#L8 assume ~n < 1;#res := 0; 22416#fiboFINAL assume true; 22414#fiboEXIT >#37#return; 22412#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 22411#fiboFINAL assume true; 22297#fiboEXIT >#35#return; 22288#L13-1 call #t~ret8 := fibo(~n - 2);< 22290#fiboENTRY ~n := #in~n; 22349#L8 assume !(~n < 1); 22312#L10 assume 1 == ~n;#res := 1; 22308#fiboFINAL assume true; 22287#fiboEXIT >#37#return; 22283#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 22281#fiboFINAL assume true; 22280#fiboEXIT >#35#return; 22245#L13-1 call #t~ret8 := fibo(~n - 2);< 22248#fiboENTRY ~n := #in~n; 22316#L8 assume !(~n < 1); 22313#L10 assume !(1 == ~n); 22136#L13 call #t~ret7 := fibo(~n - 1);< 22126#fiboENTRY ~n := #in~n; 22204#L8 assume !(~n < 1); 22205#L10 assume !(1 == ~n); 22173#L13 call #t~ret7 := fibo(~n - 1);< 22174#fiboENTRY ~n := #in~n; 22196#L8 assume !(~n < 1); 22192#L10 assume !(1 == ~n); 22171#L13 [2020-10-26 05:44:45,704 INFO L796 eck$LassoCheckResult]: Loop: 22171#L13 call #t~ret7 := fibo(~n - 1);< 22174#fiboENTRY ~n := #in~n; 22196#L8 assume !(~n < 1); 22192#L10 assume !(1 == ~n); 22171#L13 [2020-10-26 05:44:45,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:45,705 INFO L82 PathProgramCache]: Analyzing trace with hash 817988141, now seen corresponding path program 4 times [2020-10-26 05:44:45,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 05:44:45,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579739373] [2020-10-26 05:44:45,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 05:44:45,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:45,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-26 05:44:45,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:45,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-26 05:44:45,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:46,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-26 05:44:46,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:46,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-26 05:44:46,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:46,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-26 05:44:46,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:46,069 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 120 proven. 179 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-26 05:44:46,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579739373] [2020-10-26 05:44:46,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764510747] [2020-10-26 05:44:46,070 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 05:44:46,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-26 05:44:46,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 05:44:46,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-26 05:44:46,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:46,232 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 120 proven. 179 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-26 05:44:46,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 05:44:46,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-26 05:44:46,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407591567] [2020-10-26 05:44:46,234 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-26 05:44:46,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:46,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 6 times [2020-10-26 05:44:46,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 05:44:46,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834684062] [2020-10-26 05:44:46,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 05:44:46,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 05:44:46,238 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 05:44:46,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 05:44:46,239 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 05:44:46,240 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 05:44:46,294 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 05:44:46,294 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 05:44:46,294 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 05:44:46,294 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 05:44:46,294 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-26 05:44:46,294 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:46,294 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 05:44:46,294 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 05:44:46,294 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration9_Loop [2020-10-26 05:44:46,295 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 05:44:46,295 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 05:44:46,296 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:46,299 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:46,302 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:46,305 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:46,382 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 05:44:46,382 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:44:46,386 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:44:46,386 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:46,390 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 05:44:46,390 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:44:46,436 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:44:46,436 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:46,440 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 05:44:46,441 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:44:46,480 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:44:46,480 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:46,484 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 05:44:46,485 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:44:46,522 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:44:46,522 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:44:46,566 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-26 05:44:46,567 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:53,783 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-26 05:44:53,785 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 05:44:53,785 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 05:44:53,785 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 05:44:53,785 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 05:44:53,785 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-26 05:44:53,785 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:53,785 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 05:44:53,785 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 05:44:53,785 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration9_Loop [2020-10-26 05:44:53,786 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 05:44:53,786 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 05:44:53,786 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:53,789 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:53,791 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:53,803 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:53,867 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 05:44:53,867 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:44:53,877 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-26 05:44:53,879 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:44:53,879 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:44:53,879 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:44:53,879 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:44:53,879 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:44:53,880 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:44:53,881 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 75 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:53,883 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 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 76 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:53,905 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-26 05:44:53,907 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:44:53,907 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:44:53,907 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:44:53,907 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:44:53,907 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:44:53,908 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:44:53,908 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 05:44:53,909 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 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 77 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:53,933 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-26 05:44:53,935 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:44:53,935 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:44:53,935 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:44:53,935 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:44:53,935 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:44:53,936 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:44:53,936 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 05:44:53,938 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-26 05:44:53,941 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-26 05:44:53,941 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-26 05:44:53,944 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-26 05:44:53,944 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-26 05:44:53,944 INFO L510 LassoAnalysis]: Proved termination. [2020-10-26 05:44:53,944 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-10-26 05:44:53,965 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-26 05:44:53,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:54,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:54,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-26 05:44:54,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:54,158 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:44:54,163 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:44:54,167 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:44:54,169 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:44:54,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:54,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-26 05:44:54,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:54,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 05:44:54,233 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-26 05:44:54,234 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 318 states and 425 transitions. cyclomatic complexity: 111 Second operand 6 states. [2020-10-26 05:44:54,307 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 318 states and 425 transitions. cyclomatic complexity: 111. Second operand 6 states. Result 337 states and 445 transitions. Complement of second has 18 states. [2020-10-26 05:44:54,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-26 05:44:54,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-26 05:44:54,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-10-26 05:44:54,308 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 69 letters. Loop has 4 letters. [2020-10-26 05:44:54,308 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:54,309 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-26 05:44:54,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:54,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:54,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-26 05:44:54,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:54,458 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:44:54,461 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:44:54,463 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:44:54,466 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:44:54,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:54,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-26 05:44:54,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:54,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 05:44:54,518 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-26 05:44:54,518 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 318 states and 425 transitions. cyclomatic complexity: 111 Second operand 6 states. [2020-10-26 05:44:54,638 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 318 states and 425 transitions. cyclomatic complexity: 111. Second operand 6 states. Result 343 states and 451 transitions. Complement of second has 17 states. [2020-10-26 05:44:54,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2020-10-26 05:44:54,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-26 05:44:54,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-10-26 05:44:54,640 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 69 letters. Loop has 4 letters. [2020-10-26 05:44:54,640 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:54,640 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-26 05:44:54,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:54,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:54,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-26 05:44:54,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:54,808 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:44:54,816 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:44:54,820 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:44:54,825 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:44:54,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:54,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-26 05:44:54,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:54,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 05:44:54,886 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 4 loop predicates [2020-10-26 05:44:54,886 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 318 states and 425 transitions. cyclomatic complexity: 111 Second operand 6 states. [2020-10-26 05:44:54,983 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 318 states and 425 transitions. cyclomatic complexity: 111. Second operand 6 states. Result 424 states and 555 transitions. Complement of second has 27 states. [2020-10-26 05:44:54,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-26 05:44:54,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-26 05:44:54,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2020-10-26 05:44:54,986 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 69 letters. Loop has 4 letters. [2020-10-26 05:44:54,986 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:54,987 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 73 letters. Loop has 4 letters. [2020-10-26 05:44:54,987 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:54,988 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 69 letters. Loop has 8 letters. [2020-10-26 05:44:54,988 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:54,988 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 424 states and 555 transitions. [2020-10-26 05:44:54,994 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-10-26 05:44:54,999 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 424 states to 326 states and 435 transitions. [2020-10-26 05:44:55,000 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 123 [2020-10-26 05:44:55,000 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 135 [2020-10-26 05:44:55,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 326 states and 435 transitions. [2020-10-26 05:44:55,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 05:44:55,005 INFO L691 BuchiCegarLoop]: Abstraction has 326 states and 435 transitions. [2020-10-26 05:44:55,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states and 435 transitions. [2020-10-26 05:44:55,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 318. [2020-10-26 05:44:55,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-10-26 05:44:55,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 425 transitions. [2020-10-26 05:44:55,021 INFO L714 BuchiCegarLoop]: Abstraction has 318 states and 425 transitions. [2020-10-26 05:44:55,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 05:44:55,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 05:44:55,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2020-10-26 05:44:55,024 INFO L87 Difference]: Start difference. First operand 318 states and 425 transitions. Second operand 20 states. [2020-10-26 05:44:55,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 05:44:55,597 INFO L93 Difference]: Finished difference Result 462 states and 631 transitions. [2020-10-26 05:44:55,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 05:44:55,598 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 462 states and 631 transitions. [2020-10-26 05:44:55,605 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-10-26 05:44:55,613 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 462 states to 451 states and 614 transitions. [2020-10-26 05:44:55,613 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 204 [2020-10-26 05:44:55,614 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 204 [2020-10-26 05:44:55,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 451 states and 614 transitions. [2020-10-26 05:44:55,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 05:44:55,615 INFO L691 BuchiCegarLoop]: Abstraction has 451 states and 614 transitions. [2020-10-26 05:44:55,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states and 614 transitions. [2020-10-26 05:44:55,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 384. [2020-10-26 05:44:55,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-10-26 05:44:55,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 515 transitions. [2020-10-26 05:44:55,629 INFO L714 BuchiCegarLoop]: Abstraction has 384 states and 515 transitions. [2020-10-26 05:44:55,629 INFO L594 BuchiCegarLoop]: Abstraction has 384 states and 515 transitions. [2020-10-26 05:44:55,630 INFO L427 BuchiCegarLoop]: ======== Iteration 10============ [2020-10-26 05:44:55,630 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 384 states and 515 transitions. [2020-10-26 05:44:55,637 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-10-26 05:44:55,637 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 05:44:55,637 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 05:44:55,646 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [15, 14, 12, 11, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2020-10-26 05:44:55,647 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-26 05:44:55,647 INFO L794 eck$LassoCheckResult]: Stem: 25392#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(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 25375#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 25376#L27 call main_#t~ret9 := fibo(main_~x~0);< 25401#fiboENTRY ~n := #in~n; 25581#L8 assume !(~n < 1); 25505#L10 assume !(1 == ~n); 25492#L13 call #t~ret7 := fibo(~n - 1);< 25503#fiboENTRY ~n := #in~n; 25501#L8 assume !(~n < 1); 25499#L10 assume !(1 == ~n); 25495#L13 call #t~ret7 := fibo(~n - 1);< 25496#fiboENTRY ~n := #in~n; 25544#L8 assume !(~n < 1); 25530#L10 assume !(1 == ~n); 25519#L13 call #t~ret7 := fibo(~n - 1);< 25525#fiboENTRY ~n := #in~n; 25529#L8 assume !(~n < 1); 25524#L10 assume !(1 == ~n); 25516#L13 call #t~ret7 := fibo(~n - 1);< 25523#fiboENTRY ~n := #in~n; 25552#L8 assume !(~n < 1); 25550#L10 assume !(1 == ~n); 25532#L13 call #t~ret7 := fibo(~n - 1);< 25546#fiboENTRY ~n := #in~n; 25739#L8 assume !(~n < 1); 25740#L10 assume !(1 == ~n); 25388#L13 call #t~ret7 := fibo(~n - 1);< 25586#fiboENTRY ~n := #in~n; 25635#L8 assume !(~n < 1); 25634#L10 assume !(1 == ~n); 25387#L13 call #t~ret7 := fibo(~n - 1);< 25586#fiboENTRY ~n := #in~n; 25635#L8 assume !(~n < 1); 25634#L10 assume !(1 == ~n); 25387#L13 call #t~ret7 := fibo(~n - 1);< 25586#fiboENTRY ~n := #in~n; 25635#L8 assume !(~n < 1); 25634#L10 assume !(1 == ~n); 25387#L13 call #t~ret7 := fibo(~n - 1);< 25633#fiboENTRY ~n := #in~n; 25737#L8 assume !(~n < 1); 25416#L10 assume 1 == ~n;#res := 1; 25417#fiboFINAL assume true; 25738#fiboEXIT >#35#return; 25386#L13-1 call #t~ret8 := fibo(~n - 2);< 25389#fiboENTRY ~n := #in~n; 25756#L8 assume ~n < 1;#res := 0; 25752#fiboFINAL assume true; 25753#fiboEXIT >#37#return; 25380#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 25749#fiboFINAL assume true; 25746#fiboEXIT >#35#return; 25378#L13-1 call #t~ret8 := fibo(~n - 2);< 25642#fiboENTRY ~n := #in~n; 25751#L8 assume !(~n < 1); 25673#L10 assume 1 == ~n;#res := 1; 25430#fiboFINAL assume true; 25639#fiboEXIT >#37#return; 25638#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 25632#fiboFINAL assume true; 25608#fiboEXIT >#35#return; 25379#L13-1 call #t~ret8 := fibo(~n - 2);< 25541#fiboENTRY ~n := #in~n; 25730#L8 assume !(~n < 1); 25427#L10 assume !(1 == ~n); 25431#L13 call #t~ret7 := fibo(~n - 1);< 25657#fiboENTRY ~n := #in~n; 25668#L8 assume !(~n < 1); 25758#L10 assume !(1 == ~n); 25450#L13 call #t~ret7 := fibo(~n - 1);< 25447#fiboENTRY ~n := #in~n; 25669#L8 assume !(~n < 1); 25667#L10 assume !(1 == ~n); 25451#L13 [2020-10-26 05:44:55,648 INFO L796 eck$LassoCheckResult]: Loop: 25451#L13 call #t~ret7 := fibo(~n - 1);< 25447#fiboENTRY ~n := #in~n; 25669#L8 assume !(~n < 1); 25667#L10 assume !(1 == ~n); 25451#L13 [2020-10-26 05:44:55,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:55,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1637456312, now seen corresponding path program 5 times [2020-10-26 05:44:55,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 05:44:55,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217749820] [2020-10-26 05:44:55,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 05:44:55,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:56,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-26 05:44:56,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:56,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-26 05:44:56,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:56,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-26 05:44:56,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:56,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-26 05:44:56,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:56,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-26 05:44:56,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:56,031 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 219 proven. 112 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-26 05:44:56,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217749820] [2020-10-26 05:44:56,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836958977] [2020-10-26 05:44:56,032 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 05:44:56,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-26 05:44:56,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 05:44:56,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-26 05:44:56,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:56,204 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 179 proven. 18 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2020-10-26 05:44:56,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 05:44:56,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10] total 24 [2020-10-26 05:44:56,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86874239] [2020-10-26 05:44:56,206 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-26 05:44:56,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:56,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 7 times [2020-10-26 05:44:56,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 05:44:56,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183723337] [2020-10-26 05:44:56,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 05:44:56,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 05:44:56,211 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 05:44:56,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 05:44:56,214 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 05:44:56,216 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 05:44:56,265 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 05:44:56,265 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 05:44:56,265 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 05:44:56,265 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 05:44:56,265 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-26 05:44:56,265 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:56,265 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 05:44:56,265 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 05:44:56,265 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration10_Loop [2020-10-26 05:44:56,266 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 05:44:56,266 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 05:44:56,266 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:56,270 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:56,280 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:56,283 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:56,347 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 05:44:56,347 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:44:56,352 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:44:56,353 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:56,358 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 05:44:56,358 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-26 05:44:56,387 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:44:56,387 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-26 05:44:56,413 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-26 05:44:56,413 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-26 05:45:03,390 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-26 05:45:03,392 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 05:45:03,392 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 05:45:03,392 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 05:45:03,392 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 05:45:03,392 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-26 05:45:03,392 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:45:03,392 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 05:45:03,393 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 05:45:03,393 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration10_Loop [2020-10-26 05:45:03,393 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 05:45:03,393 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 05:45:03,394 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:45:03,398 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:45:03,400 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:45:03,415 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:45:03,488 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 05:45:03,489 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:45:03,500 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-26 05:45:03,502 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:45:03,502 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:45:03,502 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:45:03,502 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:45:03,502 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:45:03,503 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:45:03,503 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 83 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:45:03,507 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-26 05:45:03,529 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-26 05:45:03,530 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:45:03,531 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:45:03,531 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:45:03,531 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:45:03,531 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:45:03,531 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:45:03,531 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 05:45:03,533 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-26 05:45:03,557 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-26 05:45:03,558 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:45:03,558 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:45:03,558 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:45:03,558 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:45:03,558 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:45:03,559 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:45:03,559 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 05:45:03,562 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-26 05:45:03,566 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-26 05:45:03,566 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-26 05:45:03,570 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-26 05:45:03,571 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-26 05:45:03,571 INFO L510 LassoAnalysis]: Proved termination. [2020-10-26 05:45:03,571 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-10-26 05:45:03,591 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-26 05:45:03,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:45:03,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:45:03,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-26 05:45:03,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:45:03,765 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:45:03,768 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:45:03,769 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:45:03,772 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:45:03,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:45:03,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-26 05:45:03,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:45:03,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 05:45:03,830 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-26 05:45:03,830 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 384 states and 515 transitions. cyclomatic complexity: 135 Second operand 6 states. [2020-10-26 05:45:03,912 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 384 states and 515 transitions. cyclomatic complexity: 135. Second operand 6 states. Result 406 states and 538 transitions. Complement of second has 18 states. [2020-10-26 05:45:03,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-26 05:45:03,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-26 05:45:03,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-10-26 05:45:03,914 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 73 letters. Loop has 4 letters. [2020-10-26 05:45:03,914 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:45:03,914 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-26 05:45:03,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:45:04,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:45:04,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-26 05:45:04,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:45:04,061 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:45:04,063 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:45:04,065 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:45:04,067 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:45:04,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:45:04,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-26 05:45:04,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:45:04,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 05:45:04,128 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-26 05:45:04,128 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 384 states and 515 transitions. cyclomatic complexity: 135 Second operand 6 states. [2020-10-26 05:45:04,248 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 384 states and 515 transitions. cyclomatic complexity: 135. Second operand 6 states. Result 412 states and 544 transitions. Complement of second has 17 states. [2020-10-26 05:45:04,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2020-10-26 05:45:04,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-26 05:45:04,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-10-26 05:45:04,251 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 73 letters. Loop has 4 letters. [2020-10-26 05:45:04,251 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:45:04,252 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-26 05:45:04,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:45:04,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:45:04,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-26 05:45:04,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:45:04,411 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:45:04,414 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:45:04,415 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:45:04,417 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:45:04,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:45:04,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-26 05:45:04,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:45:04,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 05:45:04,480 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 4 loop predicates [2020-10-26 05:45:04,480 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 384 states and 515 transitions. cyclomatic complexity: 135 Second operand 6 states. [2020-10-26 05:45:04,566 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 384 states and 515 transitions. cyclomatic complexity: 135. Second operand 6 states. Result 507 states and 666 transitions. Complement of second has 27 states. [2020-10-26 05:45:04,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-26 05:45:04,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-26 05:45:04,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2020-10-26 05:45:04,569 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 73 letters. Loop has 4 letters. [2020-10-26 05:45:04,569 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:45:04,570 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 77 letters. Loop has 4 letters. [2020-10-26 05:45:04,571 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:45:04,571 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 73 letters. Loop has 8 letters. [2020-10-26 05:45:04,572 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:45:04,573 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 507 states and 666 transitions. [2020-10-26 05:45:04,579 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-10-26 05:45:04,584 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 507 states to 388 states and 520 transitions. [2020-10-26 05:45:04,584 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 144 [2020-10-26 05:45:04,585 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 156 [2020-10-26 05:45:04,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 388 states and 520 transitions. [2020-10-26 05:45:04,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 05:45:04,585 INFO L691 BuchiCegarLoop]: Abstraction has 388 states and 520 transitions. [2020-10-26 05:45:04,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states and 520 transitions. [2020-10-26 05:45:04,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 384. [2020-10-26 05:45:04,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-10-26 05:45:04,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 515 transitions. [2020-10-26 05:45:04,598 INFO L714 BuchiCegarLoop]: Abstraction has 384 states and 515 transitions. [2020-10-26 05:45:04,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 05:45:04,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 05:45:04,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2020-10-26 05:45:04,600 INFO L87 Difference]: Start difference. First operand 384 states and 515 transitions. Second operand 24 states. [2020-10-26 05:45:05,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 05:45:05,327 INFO L93 Difference]: Finished difference Result 542 states and 774 transitions. [2020-10-26 05:45:05,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 05:45:05,328 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 542 states and 774 transitions. [2020-10-26 05:45:05,346 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-26 05:45:05,346 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 542 states to 0 states and 0 transitions. [2020-10-26 05:45:05,346 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-26 05:45:05,347 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-26 05:45:05,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-26 05:45:05,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-26 05:45:05,347 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-26 05:45:05,347 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-26 05:45:05,347 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-26 05:45:05,347 INFO L427 BuchiCegarLoop]: ======== Iteration 11============ [2020-10-26 05:45:05,348 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-10-26 05:45:05,348 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-26 05:45:05,348 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-10-26 05:45:05,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 26.10 05:45:05 BoogieIcfgContainer [2020-10-26 05:45:05,358 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-26 05:45:05,359 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-26 05:45:05,359 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-26 05:45:05,359 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-26 05:45:05,360 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 05:44:17" (3/4) ... [2020-10-26 05:45:05,365 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-26 05:45:05,366 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-26 05:45:05,370 INFO L168 Benchmark]: Toolchain (without parser) took 48765.65 ms. Allocated memory was 44.0 MB in the beginning and 144.7 MB in the end (delta: 100.7 MB). Free memory was 22.3 MB in the beginning and 119.6 MB in the end (delta: -97.3 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2020-10-26 05:45:05,375 INFO L168 Benchmark]: CDTParser took 0.42 ms. Allocated memory is still 44.0 MB. Free memory was 24.8 MB in the beginning and 24.8 MB in the end (delta: 32.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 05:45:05,376 INFO L168 Benchmark]: CACSL2BoogieTranslator took 309.50 ms. Allocated memory is still 44.0 MB. Free memory was 21.7 MB in the beginning and 24.0 MB in the end (delta: -2.3 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2020-10-26 05:45:05,378 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.73 ms. Allocated memory is still 44.0 MB. Free memory was 23.9 MB in the beginning and 22.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 05:45:05,379 INFO L168 Benchmark]: Boogie Preprocessor took 37.02 ms. Allocated memory is still 44.0 MB. Free memory was 22.6 MB in the beginning and 21.7 MB in the end (delta: 949.0 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-10-26 05:45:05,380 INFO L168 Benchmark]: RCFGBuilder took 500.18 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 21.7 MB in the beginning and 30.7 MB in the end (delta: -9.0 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. [2020-10-26 05:45:05,380 INFO L168 Benchmark]: BuchiAutomizer took 47846.21 ms. Allocated memory was 54.5 MB in the beginning and 144.7 MB in the end (delta: 90.2 MB). Free memory was 30.5 MB in the beginning and 119.6 MB in the end (delta: -89.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 16.1 GB. [2020-10-26 05:45:05,381 INFO L168 Benchmark]: Witness Printer took 7.02 ms. Allocated memory is still 144.7 MB. Free memory is still 119.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 05:45:05,390 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.42 ms. Allocated memory is still 44.0 MB. Free memory was 24.8 MB in the beginning and 24.8 MB in the end (delta: 32.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 309.50 ms. Allocated memory is still 44.0 MB. Free memory was 21.7 MB in the beginning and 24.0 MB in the end (delta: -2.3 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.73 ms. Allocated memory is still 44.0 MB. Free memory was 23.9 MB in the beginning and 22.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.02 ms. Allocated memory is still 44.0 MB. Free memory was 22.6 MB in the beginning and 21.7 MB in the end (delta: 949.0 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 500.18 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 21.7 MB in the beginning and 30.7 MB in the end (delta: -9.0 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 47846.21 ms. Allocated memory was 54.5 MB in the beginning and 144.7 MB in the end (delta: 90.2 MB). Free memory was 30.5 MB in the beginning and 119.6 MB in the end (delta: -89.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 16.1 GB. * Witness Printer took 7.02 ms. Allocated memory is still 144.7 MB. Free memory is still 119.6 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 18 terminating modules (9 trivial, 3 deterministic, 6 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 10 locations. One deterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function n and consists of 9 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. 9 modules have a trivial ranking function, the largest among these consists of 24 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 47.7s and 11 iterations. TraceHistogramMax:15. Analysis of lassos took 34.9s. Construction of modules took 2.8s. Büchi inclusion checks took 8.8s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 17. Automata minimization 0.4s AutomataMinimizationTime, 17 MinimizatonAttempts, 453 StatesRemovedByMinimization, 14 NontrivialMinimizations. Non-live state removal took 0.3s Buchi closure took 0.0s. Biggest automaton had 736 states and ocurred in iteration 7. Nontrivial modules had stage [2, 1, 6, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 8/26 HoareTripleCheckerStatistics: 407 SDtfs, 1132 SDslu, 735 SDs, 0 SdLazy, 2447 SolverSat, 772 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.8s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI1 SILT8 lasso0 LassoPreprocessingBenchmarks: Lassos: inital17 mio100 ax100 hnf91 lsp95 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq185 hnf93 smp79 dnf100 smp100 tf109 neg96 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 25ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 19 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 9 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 27.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...