./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_5-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_5-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9fa59d7f4411ba9a1b89a97ebb9693c6867ac636 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-20 06:25:34,783 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 06:25:34,785 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 06:25:34,799 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 06:25:34,799 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 06:25:34,800 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 06:25:34,802 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 06:25:34,805 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 06:25:34,808 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 06:25:34,809 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 06:25:34,810 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 06:25:34,812 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 06:25:34,812 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 06:25:34,813 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 06:25:34,815 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 06:25:34,816 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 06:25:34,817 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 06:25:34,818 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 06:25:34,821 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 06:25:34,823 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 06:25:34,825 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 06:25:34,826 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 06:25:34,828 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 06:25:34,829 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 06:25:34,832 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 06:25:34,832 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 06:25:34,832 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 06:25:34,834 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 06:25:34,834 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 06:25:34,835 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 06:25:34,835 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 06:25:34,836 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 06:25:34,837 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 06:25:34,838 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 06:25:34,839 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 06:25:34,839 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 06:25:34,840 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 06:25:34,840 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 06:25:34,841 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 06:25:34,842 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 06:25:34,847 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 06:25:34,848 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2019-11-20 06:25:34,877 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 06:25:34,877 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 06:25:34,879 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 06:25:34,880 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 06:25:34,880 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 06:25:34,880 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-20 06:25:34,880 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-20 06:25:34,881 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-20 06:25:34,881 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-20 06:25:34,881 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-20 06:25:34,882 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-20 06:25:34,882 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 06:25:34,883 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 06:25:34,883 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 06:25:34,883 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 06:25:34,883 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 06:25:34,883 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 06:25:34,884 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-20 06:25:34,884 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-20 06:25:34,884 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-20 06:25:34,884 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 06:25:34,885 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 06:25:34,885 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-20 06:25:34,885 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 06:25:34,885 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-20 06:25:34,886 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 06:25:34,886 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 06:25:34,886 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-20 06:25:34,886 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 06:25:34,886 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 06:25:34,887 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-20 06:25:34,888 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-20 06:25:34,888 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9fa59d7f4411ba9a1b89a97ebb9693c6867ac636 [2019-11-20 06:25:35,088 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 06:25:35,107 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 06:25:35,110 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 06:25:35,115 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 06:25:35,116 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 06:25:35,116 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_5-2.c [2019-11-20 06:25:35,180 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/data/d65699eca/5d324cef681544dc9af0d389b3cc459b/FLAGd009422a9 [2019-11-20 06:25:35,611 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 06:25:35,611 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/sv-benchmarks/c/recursive-simple/fibo_5-2.c [2019-11-20 06:25:35,620 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/data/d65699eca/5d324cef681544dc9af0d389b3cc459b/FLAGd009422a9 [2019-11-20 06:25:35,963 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/data/d65699eca/5d324cef681544dc9af0d389b3cc459b [2019-11-20 06:25:35,979 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 06:25:35,980 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 06:25:35,981 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 06:25:35,982 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 06:25:35,985 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 06:25:35,987 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:25:35" (1/1) ... [2019-11-20 06:25:35,990 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5eea69c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:25:35, skipping insertion in model container [2019-11-20 06:25:35,990 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:25:35" (1/1) ... [2019-11-20 06:25:35,998 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 06:25:36,015 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 06:25:36,241 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 06:25:36,248 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 06:25:36,268 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 06:25:36,404 INFO L192 MainTranslator]: Completed translation [2019-11-20 06:25:36,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:25:36 WrapperNode [2019-11-20 06:25:36,416 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 06:25:36,417 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 06:25:36,417 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 06:25:36,417 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 06:25:36,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:25:36" (1/1) ... [2019-11-20 06:25:36,434 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:25:36" (1/1) ... [2019-11-20 06:25:36,456 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 06:25:36,456 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 06:25:36,457 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 06:25:36,457 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 06:25:36,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:25:36" (1/1) ... [2019-11-20 06:25:36,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:25:36" (1/1) ... [2019-11-20 06:25:36,469 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:25:36" (1/1) ... [2019-11-20 06:25:36,469 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:25:36" (1/1) ... [2019-11-20 06:25:36,472 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:25:36" (1/1) ... [2019-11-20 06:25:36,474 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:25:36" (1/1) ... [2019-11-20 06:25:36,475 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:25:36" (1/1) ... [2019-11-20 06:25:36,477 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 06:25:36,478 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 06:25:36,478 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 06:25:36,478 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 06:25:36,479 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:25:36" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 06:25:36,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 06:25:36,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 06:25:36,557 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2019-11-20 06:25:36,557 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2019-11-20 06:25:36,739 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 06:25:36,740 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-20 06:25:36,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:25:36 BoogieIcfgContainer [2019-11-20 06:25:36,741 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 06:25:36,742 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-20 06:25:36,742 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-20 06:25:36,746 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-20 06:25:36,747 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-20 06:25:36,747 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 20.11 06:25:35" (1/3) ... [2019-11-20 06:25:36,749 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@63d25da3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.11 06:25:36, skipping insertion in model container [2019-11-20 06:25:36,761 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-20 06:25:36,762 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:25:36" (2/3) ... [2019-11-20 06:25:36,762 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@63d25da3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.11 06:25:36, skipping insertion in model container [2019-11-20 06:25:36,763 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-20 06:25:36,763 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:25:36" (3/3) ... [2019-11-20 06:25:36,765 INFO L371 chiAutomizerObserver]: Analyzing ICFG fibo_5-2.c [2019-11-20 06:25:36,850 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-20 06:25:36,850 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-20 06:25:36,850 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-20 06:25:36,850 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 06:25:36,851 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 06:25:36,851 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-20 06:25:36,851 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 06:25:36,851 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-20 06:25:36,873 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2019-11-20 06:25:36,930 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-20 06:25:36,931 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 06:25:36,931 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 06:25:36,940 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-20 06:25:36,941 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-20 06:25:36,941 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-20 06:25:36,941 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2019-11-20 06:25:36,945 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-20 06:25:36,946 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 06:25:36,946 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 06:25:36,947 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-20 06:25:36,947 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-20 06:25:36,956 INFO L794 eck$LassoCheckResult]: Stem: 8#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 19#L25true call main_#t~ret2 := fibo(main_~x~0);< 11#fiboENTRYtrue [2019-11-20 06:25:36,957 INFO L796 eck$LassoCheckResult]: Loop: 11#fiboENTRYtrue ~n := #in~n; 7#L6true assume !(~n < 1); 10#L8true assume !(1 == ~n); 18#L11true call #t~ret0 := fibo(~n - 1);< 11#fiboENTRYtrue [2019-11-20 06:25:36,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:25:36,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1021, now seen corresponding path program 1 times [2019-11-20 06:25:36,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 06:25:36,976 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010507760] [2019-11-20 06:25:36,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 06:25:37,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 06:25:37,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 06:25:37,084 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 06:25:37,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:25:37,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 1 times [2019-11-20 06:25:37,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 06:25:37,086 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238780774] [2019-11-20 06:25:37,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 06:25:37,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 06:25:37,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 06:25:37,101 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 06:25:37,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:25:37,103 INFO L82 PathProgramCache]: Analyzing trace with hash 943411592, now seen corresponding path program 1 times [2019-11-20 06:25:37,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 06:25:37,103 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549076059] [2019-11-20 06:25:37,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 06:25:37,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 06:25:37,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 06:25:37,119 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 06:25:37,265 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 06:25:37,266 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 06:25:37,266 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 06:25:37,266 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 06:25:37,266 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 06:25:37,267 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 06:25:37,267 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 06:25:37,267 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 06:25:37,267 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration1_Loop [2019-11-20 06:25:37,267 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 06:25:37,268 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 06:25:37,286 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 06:25:37,293 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 06:25:37,296 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 06:25:37,299 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 06:25:37,310 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 06:25:37,401 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 06:25:37,402 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 06:25:37,408 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 06:25:37,408 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 06:25:37,416 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 06:25:37,416 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Exception during sending of exit command (exit): Broken pipe No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 06:25:37,428 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 06:25:37,428 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 06:25:37,432 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 06:25:37,432 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 /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 06:25:37,448 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 06:25:37,449 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 06:25:37,453 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 06:25:37,453 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret0=0} Honda state: {fibo_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 06:25:37,460 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 06:25:37,460 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 06:25:37,464 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 06:25:37,464 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret1=0} Honda state: {fibo_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 06:25:37,478 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 06:25:37,478 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 06:25:37,499 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 06:25:37,499 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 06:25:37,514 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 06:25:37,518 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 06:25:37,519 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 06:25:37,519 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 06:25:37,519 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 06:25:37,519 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 06:25:37,520 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 06:25:37,520 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 06:25:37,520 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 06:25:37,520 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration1_Loop [2019-11-20 06:25:37,520 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 06:25:37,521 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 06:25:37,522 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 06:25:37,532 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 06:25:37,538 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 06:25:37,544 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 06:25:37,551 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 06:25:37,636 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 06:25:37,644 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 06:25:37,659 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 [2019-11-20 06:25:37,662 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 06:25:37,662 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 06:25:37,663 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 06:25:37,663 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 06:25:37,663 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 06:25:37,668 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 06:25:37,668 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 [2019-11-20 06:25:37,674 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 06:25:37,690 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 [2019-11-20 06:25:37,694 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 06:25:37,694 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 06:25:37,694 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 06:25:37,694 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 06:25:37,695 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 06:25:37,698 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 06:25:37,698 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 [2019-11-20 06:25:37,701 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 06:25:37,718 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 [2019-11-20 06:25:37,721 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 06:25:37,721 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 06:25:37,721 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 06:25:37,721 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 06:25:37,721 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 06:25:37,725 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 06:25:37,725 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 [2019-11-20 06:25:37,729 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 06:25:37,748 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 [2019-11-20 06:25:37,751 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 06:25:37,751 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 06:25:37,751 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 06:25:37,751 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 06:25:37,751 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 06:25:37,754 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 06:25:37,754 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 [2019-11-20 06:25:37,757 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 06:25:37,773 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 [2019-11-20 06:25:37,777 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 06:25:37,777 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 06:25:37,777 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 06:25:37,777 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 06:25:37,777 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 06:25:37,780 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 06:25:37,780 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 06:25:37,786 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 06:25:37,792 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-20 06:25:37,793 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 06:25:37,806 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 06:25:37,807 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 06:25:37,807 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 06:25:37,808 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2019-11-20 06:25:37,813 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-20 06:25:37,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:25:37,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:37,874 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 06:25:37,876 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:25:37,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:37,898 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 06:25:37,899 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:25:37,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:25:37,955 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 [2019-11-20 06:25:37,957 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states. Second operand 4 states. [2019-11-20 06:25:38,112 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states.. Second operand 4 states. Result 47 states and 59 transitions. Complement of second has 12 states. [2019-11-20 06:25:38,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-20 06:25:38,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-20 06:25:38,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2019-11-20 06:25:38,117 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 4 letters. [2019-11-20 06:25:38,119 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 06:25:38,119 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 6 letters. Loop has 4 letters. [2019-11-20 06:25:38,119 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 06:25:38,120 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 8 letters. [2019-11-20 06:25:38,120 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 06:25:38,121 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 47 states and 59 transitions. [2019-11-20 06:25:38,127 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-20 06:25:38,134 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 47 states to 24 states and 33 transitions. [2019-11-20 06:25:38,136 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2019-11-20 06:25:38,136 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2019-11-20 06:25:38,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 33 transitions. [2019-11-20 06:25:38,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 06:25:38,139 INFO L688 BuchiCegarLoop]: Abstraction has 24 states and 33 transitions. [2019-11-20 06:25:38,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 33 transitions. [2019-11-20 06:25:38,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2019-11-20 06:25:38,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-20 06:25:38,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2019-11-20 06:25:38,178 INFO L711 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-11-20 06:25:38,178 INFO L591 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-11-20 06:25:38,178 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-20 06:25:38,178 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 25 transitions. [2019-11-20 06:25:38,182 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-20 06:25:38,187 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 06:25:38,187 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 06:25:38,189 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 06:25:38,189 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 06:25:38,189 INFO L794 eck$LassoCheckResult]: Stem: 120#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 121#L25 call main_#t~ret2 := fibo(main_~x~0);< 125#fiboENTRY ~n := #in~n; 126#L6 assume !(~n < 1); 124#L8 assume !(1 == ~n); 118#L11 call #t~ret0 := fibo(~n - 1);< 127#fiboENTRY ~n := #in~n; 128#L6 assume ~n < 1;#res := 0; 123#fiboFINAL assume true; 117#fiboEXIT >#32#return; 119#L11-1 [2019-11-20 06:25:38,190 INFO L796 eck$LassoCheckResult]: Loop: 119#L11-1 call #t~ret1 := fibo(~n - 2);< 132#fiboENTRY ~n := #in~n; 135#L6 assume !(~n < 1); 134#L8 assume !(1 == ~n); 130#L11 call #t~ret0 := fibo(~n - 1);< 132#fiboENTRY ~n := #in~n; 135#L6 assume ~n < 1;#res := 0; 131#fiboFINAL assume true; 133#fiboEXIT >#32#return; 119#L11-1 [2019-11-20 06:25:38,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:25:38,191 INFO L82 PathProgramCache]: Analyzing trace with hash 531553871, now seen corresponding path program 1 times [2019-11-20 06:25:38,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 06:25:38,192 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756235704] [2019-11-20 06:25:38,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 06:25:38,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:38,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:38,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:25:38,343 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756235704] [2019-11-20 06:25:38,343 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415130237] [2019-11-20 06:25:38,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/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 [2019-11-20 06:25:38,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:38,380 INFO L255 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 06:25:38,381 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:25:38,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:25:38,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 06:25:38,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-20 06:25:38,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651610572] [2019-11-20 06:25:38,412 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-20 06:25:38,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:25:38,413 INFO L82 PathProgramCache]: Analyzing trace with hash -606345326, now seen corresponding path program 1 times [2019-11-20 06:25:38,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 06:25:38,413 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085450854] [2019-11-20 06:25:38,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 06:25:38,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:38,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:38,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 06:25:38,483 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085450854] [2019-11-20 06:25:38,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 06:25:38,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-20 06:25:38,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334022757] [2019-11-20 06:25:38,484 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-20 06:25:38,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 06:25:38,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 06:25:38,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-20 06:25:38,489 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. cyclomatic complexity: 8 Second operand 6 states. [2019-11-20 06:25:38,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 06:25:38,589 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2019-11-20 06:25:38,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 06:25:38,590 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 31 transitions. [2019-11-20 06:25:38,592 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-20 06:25:38,594 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 23 states and 29 transitions. [2019-11-20 06:25:38,595 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2019-11-20 06:25:38,595 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2019-11-20 06:25:38,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 29 transitions. [2019-11-20 06:25:38,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 06:25:38,596 INFO L688 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-20 06:25:38,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 29 transitions. [2019-11-20 06:25:38,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-20 06:25:38,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-20 06:25:38,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2019-11-20 06:25:38,601 INFO L711 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-20 06:25:38,602 INFO L591 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-20 06:25:38,602 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-20 06:25:38,602 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 29 transitions. [2019-11-20 06:25:38,603 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-20 06:25:38,604 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 06:25:38,604 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 06:25:38,605 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 06:25:38,605 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-11-20 06:25:38,606 INFO L794 eck$LassoCheckResult]: Stem: 220#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 221#L25 call main_#t~ret2 := fibo(main_~x~0);< 225#fiboENTRY ~n := #in~n; 226#L6 assume !(~n < 1); 224#L8 assume !(1 == ~n); 218#L11 call #t~ret0 := fibo(~n - 1);< 227#fiboENTRY ~n := #in~n; 228#L6 assume !(~n < 1); 222#L8 assume 1 == ~n;#res := 1; 223#fiboFINAL assume true; 217#fiboEXIT >#32#return; 219#L11-1 [2019-11-20 06:25:38,606 INFO L796 eck$LassoCheckResult]: Loop: 219#L11-1 call #t~ret1 := fibo(~n - 2);< 232#fiboENTRY ~n := #in~n; 239#L6 assume !(~n < 1); 238#L8 assume !(1 == ~n); 230#L11 call #t~ret0 := fibo(~n - 1);< 232#fiboENTRY ~n := #in~n; 239#L6 assume !(~n < 1); 238#L8 assume 1 == ~n;#res := 1; 236#fiboFINAL assume true; 234#fiboEXIT >#32#return; 219#L11-1 [2019-11-20 06:25:38,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:25:38,606 INFO L82 PathProgramCache]: Analyzing trace with hash -701674289, now seen corresponding path program 1 times [2019-11-20 06:25:38,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 06:25:38,607 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117567215] [2019-11-20 06:25:38,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 06:25:38,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:38,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:38,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:25:38,678 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117567215] [2019-11-20 06:25:38,679 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86235363] [2019-11-20 06:25:38,679 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 06:25:38,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:38,724 INFO L255 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 06:25:38,725 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:25:38,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:25:38,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 06:25:38,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-20 06:25:38,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047427060] [2019-11-20 06:25:38,749 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-20 06:25:38,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:25:38,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1616811028, now seen corresponding path program 1 times [2019-11-20 06:25:38,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 06:25:38,750 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39777189] [2019-11-20 06:25:38,750 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 06:25:38,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 06:25:38,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 06:25:38,777 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 06:25:38,916 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 06:25:38,917 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 06:25:38,917 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 06:25:38,917 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 06:25:38,917 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 06:25:38,917 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 06:25:38,917 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 06:25:38,918 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 06:25:38,918 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration3_Loop [2019-11-20 06:25:38,918 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 06:25:38,918 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 06:25:38,919 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 06:25:38,930 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 06:25:38,939 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 06:25:38,942 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 06:25:39,008 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 06:25:39,009 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 06:25:39,019 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 06:25:39,019 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 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 06:25:39,052 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 06:25:39,052 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 06:25:39,591 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 06:25:39,594 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 06:25:39,594 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 06:25:39,594 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 06:25:39,594 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 06:25:39,595 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 06:25:39,595 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 06:25:39,595 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 06:25:39,595 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 06:25:39,595 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration3_Loop [2019-11-20 06:25:39,595 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 06:25:39,596 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 06:25:39,597 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 06:25:39,606 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 06:25:39,617 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 06:25:39,621 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 06:25:39,683 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 06:25:39,683 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 06:25:39,692 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 [2019-11-20 06:25:39,697 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 06:25:39,697 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 06:25:39,697 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 06:25:39,698 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 06:25:39,698 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 06:25:39,699 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 06:25:39,699 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 06:25:39,703 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 06:25:39,728 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 06:25:39,730 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 06:25:39,731 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 06:25:39,731 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 06:25:39,731 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 06:25:39,731 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 06:25:39,734 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 06:25:39,734 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 06:25:39,742 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 06:25:39,748 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-20 06:25:39,748 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 06:25:39,758 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 06:25:39,760 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 06:25:39,760 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 06:25:39,760 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-11-20 06:25:39,762 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-20 06:25:39,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:25:39,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:39,828 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 06:25:39,831 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:25:39,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:39,921 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-20 06:25:39,923 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:25:40,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:25:40,010 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2019-11-20 06:25:40,010 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8 Second operand 7 states. [2019-11-20 06:25:40,281 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8. Second operand 7 states. Result 134 states and 182 transitions. Complement of second has 28 states. [2019-11-20 06:25:40,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2019-11-20 06:25:40,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-20 06:25:40,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 34 transitions. [2019-11-20 06:25:40,290 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 10 letters. [2019-11-20 06:25:40,290 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 06:25:40,291 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 21 letters. Loop has 10 letters. [2019-11-20 06:25:40,291 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 06:25:40,293 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 20 letters. [2019-11-20 06:25:40,295 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 06:25:40,295 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 134 states and 182 transitions. [2019-11-20 06:25:40,304 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-20 06:25:40,320 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 134 states to 107 states and 151 transitions. [2019-11-20 06:25:40,322 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 63 [2019-11-20 06:25:40,323 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2019-11-20 06:25:40,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 151 transitions. [2019-11-20 06:25:40,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 06:25:40,326 INFO L688 BuchiCegarLoop]: Abstraction has 107 states and 151 transitions. [2019-11-20 06:25:40,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states and 151 transitions. [2019-11-20 06:25:40,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2019-11-20 06:25:40,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-20 06:25:40,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2019-11-20 06:25:40,363 INFO L711 BuchiCegarLoop]: Abstraction has 93 states and 125 transitions. [2019-11-20 06:25:40,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 06:25:40,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 06:25:40,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-20 06:25:40,364 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand 8 states. [2019-11-20 06:25:40,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 06:25:40,501 INFO L93 Difference]: Finished difference Result 108 states and 146 transitions. [2019-11-20 06:25:40,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 06:25:40,502 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 108 states and 146 transitions. [2019-11-20 06:25:40,508 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-20 06:25:40,513 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 108 states to 105 states and 143 transitions. [2019-11-20 06:25:40,513 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 68 [2019-11-20 06:25:40,514 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2019-11-20 06:25:40,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 143 transitions. [2019-11-20 06:25:40,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 06:25:40,514 INFO L688 BuchiCegarLoop]: Abstraction has 105 states and 143 transitions. [2019-11-20 06:25:40,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states and 143 transitions. [2019-11-20 06:25:40,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2019-11-20 06:25:40,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-20 06:25:40,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 124 transitions. [2019-11-20 06:25:40,529 INFO L711 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2019-11-20 06:25:40,529 INFO L591 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2019-11-20 06:25:40,529 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-20 06:25:40,529 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 93 states and 124 transitions. [2019-11-20 06:25:40,532 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-20 06:25:40,533 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 06:25:40,533 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 06:25:40,539 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 06:25:40,539 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2019-11-20 06:25:40,541 INFO L794 eck$LassoCheckResult]: Stem: 744#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 745#L25 call main_#t~ret2 := fibo(main_~x~0);< 769#fiboENTRY ~n := #in~n; 793#L6 assume !(~n < 1); 752#L8 assume !(1 == ~n); 753#L11 call #t~ret0 := fibo(~n - 1);< 759#fiboENTRY ~n := #in~n; 761#L6 assume !(~n < 1); 772#L8 assume !(1 == ~n); 760#L11 call #t~ret0 := fibo(~n - 1);< 759#fiboENTRY ~n := #in~n; 761#L6 assume !(~n < 1); 772#L8 assume !(1 == ~n); 760#L11 call #t~ret0 := fibo(~n - 1);< 759#fiboENTRY ~n := #in~n; 762#L6 assume !(~n < 1); 796#L8 assume 1 == ~n;#res := 1; 795#fiboFINAL assume true; 794#fiboEXIT >#32#return; 757#L11-1 call #t~ret1 := fibo(~n - 2);< 756#fiboENTRY ~n := #in~n; 758#L6 assume ~n < 1;#res := 0; 823#fiboFINAL assume true; 817#fiboEXIT >#34#return; 814#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 812#fiboFINAL assume true; 802#fiboEXIT >#32#return; 804#L11-1 [2019-11-20 06:25:40,541 INFO L796 eck$LassoCheckResult]: Loop: 804#L11-1 call #t~ret1 := fibo(~n - 2);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume !(1 == ~n); 808#L11 call #t~ret0 := fibo(~n - 1);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume !(1 == ~n); 808#L11 call #t~ret0 := fibo(~n - 1);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume 1 == ~n;#res := 1; 816#fiboFINAL assume true; 813#fiboEXIT >#32#return; 804#L11-1 call #t~ret1 := fibo(~n - 2);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume !(1 == ~n); 808#L11 call #t~ret0 := fibo(~n - 1);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume 1 == ~n;#res := 1; 816#fiboFINAL assume true; 813#fiboEXIT >#32#return; 804#L11-1 call #t~ret1 := fibo(~n - 2);< 810#fiboENTRY ~n := #in~n; 818#L6 assume ~n < 1;#res := 0; 819#fiboFINAL assume true; 821#fiboEXIT >#34#return; 809#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 811#fiboFINAL assume true; 807#fiboEXIT >#34#return; 809#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 811#fiboFINAL assume true; 807#fiboEXIT >#32#return; 804#L11-1 [2019-11-20 06:25:40,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:25:40,542 INFO L82 PathProgramCache]: Analyzing trace with hash -240562386, now seen corresponding path program 1 times [2019-11-20 06:25:40,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 06:25:40,543 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909808721] [2019-11-20 06:25:40,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 06:25:40,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:40,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:40,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:40,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:40,733 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-20 06:25:40,739 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909808721] [2019-11-20 06:25:40,740 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012156971] [2019-11-20 06:25:40,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 06:25:40,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:40,781 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 06:25:40,786 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:25:40,823 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-20 06:25:40,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 06:25:40,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-20 06:25:40,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652090246] [2019-11-20 06:25:40,830 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-20 06:25:40,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:25:40,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1408722332, now seen corresponding path program 1 times [2019-11-20 06:25:40,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 06:25:40,833 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229614099] [2019-11-20 06:25:40,833 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 06:25:40,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:40,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:40,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:40,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:40,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:40,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:40,974 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 26 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-20 06:25:40,975 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229614099] [2019-11-20 06:25:40,975 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225897153] [2019-11-20 06:25:40,976 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 06:25:41,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:41,033 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 06:25:41,036 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:25:41,079 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-20 06:25:41,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 06:25:41,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-11-20 06:25:41,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872138878] [2019-11-20 06:25:41,080 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-20 06:25:41,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 06:25:41,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 06:25:41,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-11-20 06:25:41,081 INFO L87 Difference]: Start difference. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 12 states. [2019-11-20 06:25:41,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 06:25:41,378 INFO L93 Difference]: Finished difference Result 115 states and 158 transitions. [2019-11-20 06:25:41,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 06:25:41,379 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 115 states and 158 transitions. [2019-11-20 06:25:41,383 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2019-11-20 06:25:41,388 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 115 states to 113 states and 156 transitions. [2019-11-20 06:25:41,388 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 76 [2019-11-20 06:25:41,388 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 76 [2019-11-20 06:25:41,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 113 states and 156 transitions. [2019-11-20 06:25:41,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 06:25:41,389 INFO L688 BuchiCegarLoop]: Abstraction has 113 states and 156 transitions. [2019-11-20 06:25:41,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states and 156 transitions. [2019-11-20 06:25:41,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2019-11-20 06:25:41,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-20 06:25:41,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 156 transitions. [2019-11-20 06:25:41,402 INFO L711 BuchiCegarLoop]: Abstraction has 113 states and 156 transitions. [2019-11-20 06:25:41,403 INFO L591 BuchiCegarLoop]: Abstraction has 113 states and 156 transitions. [2019-11-20 06:25:41,403 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-11-20 06:25:41,403 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 113 states and 156 transitions. [2019-11-20 06:25:41,406 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2019-11-20 06:25:41,406 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 06:25:41,406 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 06:25:41,408 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 06:25:41,408 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2019-11-20 06:25:41,408 INFO L794 eck$LassoCheckResult]: Stem: 1248#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 1249#L25 call main_#t~ret2 := fibo(main_~x~0);< 1278#fiboENTRY ~n := #in~n; 1308#L6 assume !(~n < 1); 1307#L8 assume !(1 == ~n); 1256#L11 call #t~ret0 := fibo(~n - 1);< 1273#fiboENTRY ~n := #in~n; 1274#L6 assume !(~n < 1); 1255#L8 assume !(1 == ~n); 1257#L11 call #t~ret0 := fibo(~n - 1);< 1301#fiboENTRY ~n := #in~n; 1305#L6 assume !(~n < 1); 1303#L8 assume !(1 == ~n); 1263#L11 call #t~ret0 := fibo(~n - 1);< 1301#fiboENTRY ~n := #in~n; 1305#L6 assume !(~n < 1); 1303#L8 assume !(1 == ~n); 1263#L11 call #t~ret0 := fibo(~n - 1);< 1301#fiboENTRY ~n := #in~n; 1306#L6 assume !(~n < 1); 1304#L8 assume 1 == ~n;#res := 1; 1302#fiboFINAL assume true; 1300#fiboEXIT >#32#return; 1243#L11-1 call #t~ret1 := fibo(~n - 2);< 1298#fiboENTRY ~n := #in~n; 1345#L6 assume ~n < 1;#res := 0; 1344#fiboFINAL assume true; 1342#fiboEXIT >#34#return; 1340#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 1339#fiboFINAL assume true; 1332#fiboEXIT >#32#return; 1260#L11-1 [2019-11-20 06:25:41,409 INFO L796 eck$LassoCheckResult]: Loop: 1260#L11-1 call #t~ret1 := fibo(~n - 2);< 1276#fiboENTRY ~n := #in~n; 1309#L6 assume !(~n < 1); 1311#L8 assume !(1 == ~n); 1262#L11 call #t~ret0 := fibo(~n - 1);< 1276#fiboENTRY ~n := #in~n; 1309#L6 assume !(~n < 1); 1311#L8 assume !(1 == ~n); 1262#L11 call #t~ret0 := fibo(~n - 1);< 1276#fiboENTRY ~n := #in~n; 1309#L6 assume !(~n < 1); 1311#L8 assume 1 == ~n;#res := 1; 1254#fiboFINAL assume true; 1346#fiboEXIT >#32#return; 1252#L11-1 call #t~ret1 := fibo(~n - 2);< 1271#fiboENTRY ~n := #in~n; 1272#L6 assume ~n < 1;#res := 0; 1310#fiboFINAL assume true; 1347#fiboEXIT >#34#return; 1244#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 1258#fiboFINAL assume true; 1264#fiboEXIT >#32#return; 1260#L11-1 [2019-11-20 06:25:41,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:25:41,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1087292419, now seen corresponding path program 2 times [2019-11-20 06:25:41,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 06:25:41,410 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450520140] [2019-11-20 06:25:41,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 06:25:41,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 06:25:41,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 06:25:41,433 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 06:25:41,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:25:41,433 INFO L82 PathProgramCache]: Analyzing trace with hash 22774646, now seen corresponding path program 2 times [2019-11-20 06:25:41,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 06:25:41,434 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895008197] [2019-11-20 06:25:41,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 06:25:41,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 06:25:41,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 06:25:41,448 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 06:25:41,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:25:41,449 INFO L82 PathProgramCache]: Analyzing trace with hash 560101880, now seen corresponding path program 3 times [2019-11-20 06:25:41,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 06:25:41,449 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951196020] [2019-11-20 06:25:41,450 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 06:25:41,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:41,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:41,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:41,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:41,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:41,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:41,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:41,674 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 52 proven. 67 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-20 06:25:41,675 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951196020] [2019-11-20 06:25:41,675 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898114455] [2019-11-20 06:25:41,675 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 06:25:41,742 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-20 06:25:41,743 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 06:25:41,744 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-20 06:25:41,747 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:25:41,805 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 63 proven. 69 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-20 06:25:41,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 06:25:41,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2019-11-20 06:25:41,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376997568] [2019-11-20 06:25:42,107 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 06:25:42,107 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 06:25:42,107 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 06:25:42,107 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 06:25:42,107 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 06:25:42,108 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 06:25:42,108 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 06:25:42,108 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 06:25:42,108 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration5_Loop [2019-11-20 06:25:42,108 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 06:25:42,108 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 06:25:42,109 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 06:25:42,112 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 06:25:42,114 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 06:25:42,118 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 06:25:42,197 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 06:25:42,198 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 06:25:42,202 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 06:25:42,202 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 06:25:42,205 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 06:25:42,205 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret1=0} Honda state: {fibo_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 06:25:42,211 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 06:25:42,211 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 06:25:42,214 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 06:25:42,214 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 /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 06:25:42,221 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 06:25:42,222 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 06:25:42,225 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 06:25:42,225 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret0=1} Honda state: {fibo_#t~ret0=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 06:25:42,231 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 06:25:42,231 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 06:25:42,240 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 06:25:42,241 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 06:25:42,922 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 06:25:42,924 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 06:25:42,924 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 06:25:42,924 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 06:25:42,924 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 06:25:42,924 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 06:25:42,924 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 06:25:42,924 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 06:25:42,925 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 06:25:42,925 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration5_Loop [2019-11-20 06:25:42,925 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 06:25:42,925 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 06:25:42,926 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 06:25:42,929 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 06:25:42,931 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 06:25:42,943 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 06:25:43,015 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 06:25:43,015 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 06:25:43,030 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 [2019-11-20 06:25:43,032 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 06:25:43,033 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 06:25:43,033 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 06:25:43,033 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 06:25:43,033 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 06:25:43,035 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 06:25:43,035 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 06:25:43,040 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 06:25:43,047 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 [2019-11-20 06:25:43,049 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 06:25:43,049 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 06:25:43,049 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 06:25:43,049 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 06:25:43,049 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 06:25:43,050 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 06:25:43,050 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 06:25:43,051 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 06:25:43,056 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 [2019-11-20 06:25:43,057 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 06:25:43,058 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 06:25:43,058 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 06:25:43,058 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 06:25:43,058 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 06:25:43,060 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 06:25:43,060 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 06:25:43,066 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 06:25:43,074 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-20 06:25:43,074 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 06:25:43,083 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 06:25:43,083 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 06:25:43,083 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 06:25:43,084 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 06:25:43,091 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-20 06:25:43,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:25:43,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:43,166 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-20 06:25:43,169 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:25:43,192 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 06:25:43,198 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 06:25:43,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:43,231 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-20 06:25:43,234 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:25:43,312 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-20 06:25:43,312 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 [2019-11-20 06:25:43,312 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 156 transitions. cyclomatic complexity: 49 Second operand 8 states. [2019-11-20 06:25:43,558 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 156 transitions. cyclomatic complexity: 49. Second operand 8 states. Result 182 states and 248 transitions. Complement of second has 33 states. [2019-11-20 06:25:43,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2019-11-20 06:25:43,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-20 06:25:43,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 36 transitions. [2019-11-20 06:25:43,562 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 36 transitions. Stem has 31 letters. Loop has 22 letters. [2019-11-20 06:25:43,562 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 06:25:43,562 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 06:25:43,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:25:43,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:43,620 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-20 06:25:43,622 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:25:43,660 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 06:25:43,664 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 06:25:43,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:43,695 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-20 06:25:43,697 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:25:43,791 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-20 06:25:43,801 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 [2019-11-20 06:25:43,801 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 156 transitions. cyclomatic complexity: 49 Second operand 8 states. [2019-11-20 06:25:44,075 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 156 transitions. cyclomatic complexity: 49. Second operand 8 states. Result 307 states and 417 transitions. Complement of second has 25 states. [2019-11-20 06:25:44,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2019-11-20 06:25:44,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-20 06:25:44,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 23 transitions. [2019-11-20 06:25:44,080 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 23 transitions. Stem has 31 letters. Loop has 22 letters. [2019-11-20 06:25:44,081 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 06:25:44,082 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 06:25:44,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:25:44,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:44,143 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-20 06:25:44,150 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:25:44,183 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 06:25:44,186 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 06:25:44,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:44,221 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-20 06:25:44,224 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:25:44,326 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-20 06:25:44,328 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 [2019-11-20 06:25:44,328 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 156 transitions. cyclomatic complexity: 49 Second operand 8 states. [2019-11-20 06:25:44,655 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 156 transitions. cyclomatic complexity: 49. Second operand 8 states. Result 1077 states and 1514 transitions. Complement of second has 130 states. [2019-11-20 06:25:44,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2019-11-20 06:25:44,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-20 06:25:44,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 41 transitions. [2019-11-20 06:25:44,658 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 31 letters. Loop has 22 letters. [2019-11-20 06:25:44,663 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 06:25:44,663 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 53 letters. Loop has 22 letters. [2019-11-20 06:25:44,665 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 06:25:44,666 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 31 letters. Loop has 44 letters. [2019-11-20 06:25:44,670 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 06:25:44,671 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1077 states and 1514 transitions. [2019-11-20 06:25:44,695 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 58 [2019-11-20 06:25:44,715 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1077 states to 604 states and 937 transitions. [2019-11-20 06:25:44,715 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 242 [2019-11-20 06:25:44,717 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 271 [2019-11-20 06:25:44,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 604 states and 937 transitions. [2019-11-20 06:25:44,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 06:25:44,719 INFO L688 BuchiCegarLoop]: Abstraction has 604 states and 937 transitions. [2019-11-20 06:25:44,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states and 937 transitions. [2019-11-20 06:25:44,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 475. [2019-11-20 06:25:44,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 475 states. [2019-11-20 06:25:44,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 723 transitions. [2019-11-20 06:25:44,794 INFO L711 BuchiCegarLoop]: Abstraction has 475 states and 723 transitions. [2019-11-20 06:25:44,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 06:25:44,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-20 06:25:44,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2019-11-20 06:25:44,796 INFO L87 Difference]: Start difference. First operand 475 states and 723 transitions. Second operand 16 states. [2019-11-20 06:25:45,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 06:25:45,250 INFO L93 Difference]: Finished difference Result 150 states and 188 transitions. [2019-11-20 06:25:45,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-20 06:25:45,252 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 150 states and 188 transitions. [2019-11-20 06:25:45,255 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-11-20 06:25:45,258 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 150 states to 150 states and 188 transitions. [2019-11-20 06:25:45,258 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 80 [2019-11-20 06:25:45,259 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 105 [2019-11-20 06:25:45,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 150 states and 188 transitions. [2019-11-20 06:25:45,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 06:25:45,260 INFO L688 BuchiCegarLoop]: Abstraction has 150 states and 188 transitions. [2019-11-20 06:25:45,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states and 188 transitions. [2019-11-20 06:25:45,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 121. [2019-11-20 06:25:45,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-11-20 06:25:45,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 142 transitions. [2019-11-20 06:25:45,267 INFO L711 BuchiCegarLoop]: Abstraction has 121 states and 142 transitions. [2019-11-20 06:25:45,267 INFO L591 BuchiCegarLoop]: Abstraction has 121 states and 142 transitions. [2019-11-20 06:25:45,267 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-11-20 06:25:45,267 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 121 states and 142 transitions. [2019-11-20 06:25:45,269 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-11-20 06:25:45,269 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 06:25:45,269 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 06:25:45,273 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [9, 7, 6, 6, 5, 3, 3, 2, 2, 2, 1, 1, 1] [2019-11-20 06:25:45,273 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-20 06:25:45,274 INFO L794 eck$LassoCheckResult]: Stem: 4528#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 4529#L25 call main_#t~ret2 := fibo(main_~x~0);< 4551#fiboENTRY ~n := #in~n; 4549#L6 assume !(~n < 1); 4550#L8 assume !(1 == ~n); 4540#L11 call #t~ret0 := fibo(~n - 1);< 4539#fiboENTRY ~n := #in~n; 4541#L6 assume !(~n < 1); 4574#L8 assume !(1 == ~n); 4533#L11 call #t~ret0 := fibo(~n - 1);< 4548#fiboENTRY ~n := #in~n; 4572#L6 assume !(~n < 1); 4532#L8 assume !(1 == ~n); 4534#L11 call #t~ret0 := fibo(~n - 1);< 4548#fiboENTRY ~n := #in~n; 4572#L6 assume !(~n < 1); 4532#L8 assume !(1 == ~n); 4534#L11 call #t~ret0 := fibo(~n - 1);< 4548#fiboENTRY ~n := #in~n; 4573#L6 assume !(~n < 1); 4610#L8 assume 1 == ~n;#res := 1; 4609#fiboFINAL assume true; 4608#fiboEXIT >#32#return; 4605#L11-1 call #t~ret1 := fibo(~n - 2);< 4607#fiboENTRY ~n := #in~n; 4629#L6 assume ~n < 1;#res := 0; 4627#fiboFINAL assume true; 4625#fiboEXIT >#34#return; 4624#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 4623#fiboFINAL assume true; 4595#fiboEXIT >#32#return; 4576#L11-1 call #t~ret1 := fibo(~n - 2);< 4587#fiboENTRY ~n := #in~n; 4628#L6 assume ~n < 1;#res := 0; 4626#fiboFINAL assume true; 4585#fiboEXIT >#34#return; 4583#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 4581#fiboFINAL assume true; 4575#fiboEXIT >#32#return; 4562#L11-1 call #t~ret1 := fibo(~n - 2);< 4568#fiboENTRY ~n := #in~n; 4567#L6 assume !(~n < 1); 4564#L8 assume !(1 == ~n); 4566#L11 call #t~ret0 := fibo(~n - 1);< 4620#fiboENTRY ~n := #in~n; 4633#L6 assume !(~n < 1); 4634#L8 assume !(1 == ~n); 4520#L11 call #t~ret0 := fibo(~n - 1);< 4547#fiboENTRY [2019-11-20 06:25:45,274 INFO L796 eck$LassoCheckResult]: Loop: 4547#fiboENTRY ~n := #in~n; 4636#L6 assume !(~n < 1); 4631#L8 assume !(1 == ~n); 4519#L11 call #t~ret0 := fibo(~n - 1);< 4547#fiboENTRY [2019-11-20 06:25:45,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:25:45,275 INFO L82 PathProgramCache]: Analyzing trace with hash -918730881, now seen corresponding path program 4 times [2019-11-20 06:25:45,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 06:25:45,275 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527053451] [2019-11-20 06:25:45,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 06:25:45,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:45,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:45,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:45,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:45,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:45,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:45,509 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 73 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-11-20 06:25:45,509 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527053451] [2019-11-20 06:25:45,510 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046470413] [2019-11-20 06:25:45,510 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 06:25:45,552 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 06:25:45,552 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 06:25:45,553 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 06:25:45,555 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:25:45,705 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 65 proven. 42 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-20 06:25:45,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 06:25:45,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2019-11-20 06:25:45,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261505866] [2019-11-20 06:25:45,706 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-20 06:25:45,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:25:45,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 2 times [2019-11-20 06:25:45,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 06:25:45,706 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658568931] [2019-11-20 06:25:45,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 06:25:45,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 06:25:45,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 06:25:45,710 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 06:25:45,762 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 06:25:45,762 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 06:25:45,762 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 06:25:45,762 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 06:25:45,763 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 06:25:45,763 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 06:25:45,763 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 06:25:45,763 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 06:25:45,763 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration6_Loop [2019-11-20 06:25:45,763 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 06:25:45,763 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 06:25:45,764 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 06:25:45,767 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 06:25:45,769 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 06:25:45,772 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 06:25:45,780 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 06:25:45,832 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 06:25:45,833 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 06:25:45,838 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 06:25:45,838 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 06:25:45,842 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 06:25:45,842 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 /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/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 [2019-11-20 06:25:45,848 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 06:25:45,848 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 06:25:45,851 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 06:25:45,851 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 /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 06:25:45,858 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 06:25:45,858 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 [2019-11-20 06:25:45,862 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 06:25:45,862 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret0=0} Honda state: {fibo_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 06:25:45,868 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 06:25:45,868 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 06:25:45,879 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 06:25:45,879 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 06:25:45,931 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 06:25:45,933 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 06:25:45,933 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 06:25:45,933 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 06:25:45,933 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 06:25:45,933 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 06:25:45,933 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 06:25:45,933 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 06:25:45,933 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 06:25:45,933 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration6_Loop [2019-11-20 06:25:45,933 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 06:25:45,934 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 06:25:45,934 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 06:25:45,936 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 06:25:45,938 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 06:25:45,948 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 06:25:45,957 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 06:25:46,004 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 06:25:46,005 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 06:25:46,011 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 [2019-11-20 06:25:46,013 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 06:25:46,013 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 06:25:46,013 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 06:25:46,013 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 06:25:46,013 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 06:25:46,014 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 06:25:46,014 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 06:25:46,016 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 06:25:46,039 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 [2019-11-20 06:25:46,041 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 06:25:46,042 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 06:25:46,042 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 06:25:46,042 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 06:25:46,042 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 06:25:46,043 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 06:25:46,043 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 06:25:46,044 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 06:25:46,049 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 [2019-11-20 06:25:46,050 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 06:25:46,051 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 06:25:46,051 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 06:25:46,051 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 06:25:46,051 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 06:25:46,051 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 06:25:46,051 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 06:25:46,053 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 06:25:46,058 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 [2019-11-20 06:25:46,059 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 06:25:46,059 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 06:25:46,060 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 06:25:46,060 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 06:25:46,060 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 06:25:46,061 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 06:25:46,061 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 06:25:46,063 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 06:25:46,066 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-20 06:25:46,066 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b9fab879-bed8-4e69-9959-f6a74e807b24/bin/uautomizer/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 06:25:46,071 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 06:25:46,071 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 06:25:46,071 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 06:25:46,071 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2019-11-20 06:25:46,072 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-20 06:25:46,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:25:46,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:46,158 INFO L255 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-20 06:25:46,160 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:25:46,187 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 06:25:46,190 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 06:25:46,192 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 06:25:46,194 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 06:25:46,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:46,213 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 06:25:46,213 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:25:46,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:25:46,238 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 [2019-11-20 06:25:46,238 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 121 states and 142 transitions. cyclomatic complexity: 24 Second operand 5 states. [2019-11-20 06:25:46,324 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 121 states and 142 transitions. cyclomatic complexity: 24. Second operand 5 states. Result 131 states and 152 transitions. Complement of second has 13 states. [2019-11-20 06:25:46,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-20 06:25:46,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-20 06:25:46,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2019-11-20 06:25:46,326 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 48 letters. Loop has 4 letters. [2019-11-20 06:25:46,327 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 06:25:46,327 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 06:25:46,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:25:46,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:46,410 INFO L255 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-20 06:25:46,413 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:25:46,437 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 06:25:46,443 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 06:25:46,445 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 06:25:46,457 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 06:25:46,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:46,468 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 06:25:46,468 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:25:46,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:25:46,490 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 [2019-11-20 06:25:46,490 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 121 states and 142 transitions. cyclomatic complexity: 24 Second operand 5 states. [2019-11-20 06:25:46,589 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 121 states and 142 transitions. cyclomatic complexity: 24. Second operand 5 states. Result 131 states and 152 transitions. Complement of second has 13 states. [2019-11-20 06:25:46,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-20 06:25:46,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-20 06:25:46,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2019-11-20 06:25:46,590 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 48 letters. Loop has 4 letters. [2019-11-20 06:25:46,591 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 06:25:46,591 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 06:25:46,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:25:46,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:46,680 INFO L255 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-20 06:25:46,682 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:25:46,709 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 06:25:46,716 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 06:25:46,717 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 06:25:46,725 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 06:25:46,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:25:46,742 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 06:25:46,743 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:25:46,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:25:46,769 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 [2019-11-20 06:25:46,769 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 121 states and 142 transitions. cyclomatic complexity: 24 Second operand 5 states. [2019-11-20 06:25:46,863 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 121 states and 142 transitions. cyclomatic complexity: 24. Second operand 5 states. Result 170 states and 193 transitions. Complement of second has 14 states. [2019-11-20 06:25:46,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-20 06:25:46,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-20 06:25:46,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 20 transitions. [2019-11-20 06:25:46,869 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 48 letters. Loop has 4 letters. [2019-11-20 06:25:46,870 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 06:25:46,870 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 52 letters. Loop has 4 letters. [2019-11-20 06:25:46,870 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 06:25:46,870 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 48 letters. Loop has 8 letters. [2019-11-20 06:25:46,871 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 06:25:46,871 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 170 states and 193 transitions. [2019-11-20 06:25:46,875 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-20 06:25:46,875 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 170 states to 0 states and 0 transitions. [2019-11-20 06:25:46,876 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-20 06:25:46,876 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-20 06:25:46,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-20 06:25:46,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-20 06:25:46,876 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 06:25:46,877 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 06:25:46,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 06:25:46,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-20 06:25:46,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2019-11-20 06:25:46,880 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 19 states. [2019-11-20 06:25:46,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 06:25:46,880 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2019-11-20 06:25:46,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-20 06:25:46,880 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2019-11-20 06:25:46,881 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-20 06:25:46,882 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2019-11-20 06:25:46,882 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-20 06:25:46,882 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-20 06:25:46,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-20 06:25:46,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-20 06:25:46,883 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 06:25:46,883 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 06:25:46,883 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 06:25:46,883 INFO L424 BuchiCegarLoop]: ======== Iteration 7============ [2019-11-20 06:25:46,883 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-11-20 06:25:46,883 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-20 06:25:46,884 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-11-20 06:25:46,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 20.11 06:25:46 BoogieIcfgContainer [2019-11-20 06:25:46,907 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-20 06:25:46,908 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 06:25:46,908 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 06:25:46,908 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 06:25:46,909 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:25:36" (3/4) ... [2019-11-20 06:25:46,912 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-20 06:25:46,915 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 06:25:46,918 INFO L168 Benchmark]: Toolchain (without parser) took 10936.96 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 187.7 MB). Free memory was 944.7 MB in the beginning and 1.0 GB in the end (delta: -58.7 MB). Peak memory consumption was 129.0 MB. Max. memory is 11.5 GB. [2019-11-20 06:25:46,925 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 06:25:46,926 INFO L168 Benchmark]: CACSL2BoogieTranslator took 435.14 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.4 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -199.4 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-11-20 06:25:46,926 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.36 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 06:25:46,927 INFO L168 Benchmark]: Boogie Preprocessor took 20.55 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 06:25:46,927 INFO L168 Benchmark]: RCFGBuilder took 264.15 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2019-11-20 06:25:46,930 INFO L168 Benchmark]: BuchiAutomizer took 10165.16 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 38.3 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 122.4 MB). Peak memory consumption was 160.7 MB. Max. memory is 11.5 GB. [2019-11-20 06:25:46,930 INFO L168 Benchmark]: Witness Printer took 8.06 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 06:25:46,933 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 435.14 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.4 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -199.4 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 39.36 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.55 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 264.15 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 10165.16 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 38.3 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 122.4 MB). Peak memory consumption was 160.7 MB. Max. memory is 11.5 GB. * Witness Printer took 8.06 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 9 terminating modules (5 trivial, 2 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function n and consists of 9 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. 5 modules have a trivial ranking function, the largest among these consists of 19 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 10.0s and 7 iterations. TraceHistogramMax:9. Analysis of lassos took 5.3s. Construction of modules took 0.9s. Büchi inclusion checks took 3.2s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 7. Automata minimization 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 189 StatesRemovedByMinimization, 5 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had 121 states and ocurred in iteration 5. Nontrivial modules had stage [2, 0, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 10/26 HoareTripleCheckerStatistics: 144 SDtfs, 387 SDslu, 153 SDs, 0 SdLazy, 699 SolverSat, 227 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT1 SILN0 SILU0 SILI2 SILT2 lasso0 LassoPreprocessingBenchmarks: Lassos: inital16 mio100 ax100 hnf100 lsp92 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq180 hnf93 smp79 dnf100 smp100 tf110 neg96 sie109 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 29ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 10 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.4s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...