./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 f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_0ca05433-3ceb-4204-a9b9-02cf1492887f/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_0ca05433-3ceb-4204-a9b9-02cf1492887f/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_0ca05433-3ceb-4204-a9b9-02cf1492887f/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_0ca05433-3ceb-4204-a9b9-02cf1492887f/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_5-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_0ca05433-3ceb-4204-a9b9-02cf1492887f/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_0ca05433-3ceb-4204-a9b9-02cf1492887f/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 0.1.25-f470102 [2019-12-07 13:04:55,566 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 13:04:55,568 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 13:04:55,575 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 13:04:55,575 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 13:04:55,576 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 13:04:55,577 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 13:04:55,578 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 13:04:55,580 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 13:04:55,580 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 13:04:55,581 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 13:04:55,582 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 13:04:55,582 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 13:04:55,583 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 13:04:55,583 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 13:04:55,584 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 13:04:55,585 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 13:04:55,585 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 13:04:55,587 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 13:04:55,589 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 13:04:55,590 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 13:04:55,590 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 13:04:55,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 13:04:55,592 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 13:04:55,593 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 13:04:55,594 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 13:04:55,594 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 13:04:55,594 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 13:04:55,594 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 13:04:55,595 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 13:04:55,595 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 13:04:55,596 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 13:04:55,596 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 13:04:55,596 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 13:04:55,597 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 13:04:55,597 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 13:04:55,598 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 13:04:55,598 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 13:04:55,598 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 13:04:55,598 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 13:04:55,599 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 13:04:55,599 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_0ca05433-3ceb-4204-a9b9-02cf1492887f/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2019-12-07 13:04:55,611 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 13:04:55,611 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 13:04:55,611 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 13:04:55,612 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 13:04:55,612 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 13:04:55,612 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-12-07 13:04:55,612 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-12-07 13:04:55,612 INFO L138 SettingsManager]: * Use old map elimination=false [2019-12-07 13:04:55,612 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-12-07 13:04:55,612 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-12-07 13:04:55,612 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-12-07 13:04:55,612 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 13:04:55,613 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 13:04:55,613 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 13:04:55,613 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 13:04:55,613 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 13:04:55,613 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 13:04:55,613 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-12-07 13:04:55,613 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-12-07 13:04:55,613 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-12-07 13:04:55,613 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 13:04:55,614 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 13:04:55,614 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-12-07 13:04:55,614 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 13:04:55,614 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-12-07 13:04:55,614 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 13:04:55,614 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 13:04:55,614 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-12-07 13:04:55,615 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 13:04:55,615 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 13:04:55,615 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 13:04:55,615 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-12-07 13:04:55,615 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-12-07 13:04:55,616 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_0ca05433-3ceb-4204-a9b9-02cf1492887f/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 [2019-12-07 13:04:55,718 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 13:04:55,728 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 13:04:55,731 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 13:04:55,732 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 13:04:55,733 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 13:04:55,733 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_0ca05433-3ceb-4204-a9b9-02cf1492887f/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_5-2.c [2019-12-07 13:04:55,782 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0ca05433-3ceb-4204-a9b9-02cf1492887f/bin/uautomizer/data/bf189f9c0/2a135b0388dc4178a5af7c0fe1e7be5c/FLAG0ead02cfb [2019-12-07 13:04:56,177 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 13:04:56,178 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_0ca05433-3ceb-4204-a9b9-02cf1492887f/sv-benchmarks/c/recursive-simple/fibo_5-2.c [2019-12-07 13:04:56,182 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0ca05433-3ceb-4204-a9b9-02cf1492887f/bin/uautomizer/data/bf189f9c0/2a135b0388dc4178a5af7c0fe1e7be5c/FLAG0ead02cfb [2019-12-07 13:04:56,558 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_0ca05433-3ceb-4204-a9b9-02cf1492887f/bin/uautomizer/data/bf189f9c0/2a135b0388dc4178a5af7c0fe1e7be5c [2019-12-07 13:04:56,561 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 13:04:56,562 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 13:04:56,563 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 13:04:56,563 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 13:04:56,566 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 13:04:56,567 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:04:56" (1/1) ... [2019-12-07 13:04:56,569 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d852d90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:04:56, skipping insertion in model container [2019-12-07 13:04:56,569 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:04:56" (1/1) ... [2019-12-07 13:04:56,574 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 13:04:56,584 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 13:04:56,676 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 13:04:56,678 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 13:04:56,687 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 13:04:56,729 INFO L208 MainTranslator]: Completed translation [2019-12-07 13:04:56,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:04:56 WrapperNode [2019-12-07 13:04:56,729 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 13:04:56,730 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 13:04:56,730 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 13:04:56,730 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 13:04:56,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:04:56" (1/1) ... [2019-12-07 13:04:56,740 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:04:56" (1/1) ... [2019-12-07 13:04:56,751 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 13:04:56,752 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 13:04:56,752 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 13:04:56,752 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 13:04:56,758 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:04:56" (1/1) ... [2019-12-07 13:04:56,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:04:56" (1/1) ... [2019-12-07 13:04:56,759 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:04:56" (1/1) ... [2019-12-07 13:04:56,759 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:04:56" (1/1) ... [2019-12-07 13:04:56,761 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:04:56" (1/1) ... [2019-12-07 13:04:56,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:04:56" (1/1) ... [2019-12-07 13:04:56,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:04:56" (1/1) ... [2019-12-07 13:04:56,764 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 13:04:56,764 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 13:04:56,764 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 13:04:56,764 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 13:04:56,765 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:04:56" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0ca05433-3ceb-4204-a9b9-02cf1492887f/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 [2019-12-07 13:04:56,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 13:04:56,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 13:04:56,810 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2019-12-07 13:04:56,811 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2019-12-07 13:04:56,907 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 13:04:56,907 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-12-07 13:04:56,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:04:56 BoogieIcfgContainer [2019-12-07 13:04:56,908 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 13:04:56,909 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-12-07 13:04:56,909 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-12-07 13:04:56,911 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-12-07 13:04:56,911 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-12-07 13:04:56,912 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 07.12 01:04:56" (1/3) ... [2019-12-07 13:04:56,912 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5e0a0965 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 07.12 01:04:56, skipping insertion in model container [2019-12-07 13:04:56,912 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-12-07 13:04:56,912 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:04:56" (2/3) ... [2019-12-07 13:04:56,913 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5e0a0965 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 07.12 01:04:56, skipping insertion in model container [2019-12-07 13:04:56,913 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-12-07 13:04:56,913 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:04:56" (3/3) ... [2019-12-07 13:04:56,914 INFO L371 chiAutomizerObserver]: Analyzing ICFG fibo_5-2.c [2019-12-07 13:04:56,944 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-12-07 13:04:56,945 INFO L357 BuchiCegarLoop]: Hoare is false [2019-12-07 13:04:56,945 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-12-07 13:04:56,945 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 13:04:56,945 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 13:04:56,945 INFO L361 BuchiCegarLoop]: Difference is false [2019-12-07 13:04:56,945 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 13:04:56,945 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-12-07 13:04:56,954 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2019-12-07 13:04:56,972 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-12-07 13:04:56,972 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 13:04:56,973 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 13:04:56,978 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-12-07 13:04:56,978 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-12-07 13:04:56,978 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-12-07 13:04:56,978 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2019-12-07 13:04:56,979 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-12-07 13:04:56,980 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 13:04:56,980 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 13:04:56,980 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-12-07 13:04:56,980 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-12-07 13:04:56,985 INFO L794 eck$LassoCheckResult]: Stem: 8#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 19#L25true call main_#t~ret2 := fibo(main_~x~0);< 11#fiboENTRYtrue [2019-12-07 13:04:56,985 INFO L796 eck$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 [2019-12-07 13:04:56,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:04:56,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1021, now seen corresponding path program 1 times [2019-12-07 13:04:56,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:04:56,995 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940474231] [2019-12-07 13:04:56,996 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:04:57,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 13:04:57,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 13:04:57,060 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 13:04:57,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:04:57,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 1 times [2019-12-07 13:04:57,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:04:57,062 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367698236] [2019-12-07 13:04:57,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:04:57,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 13:04:57,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 13:04:57,070 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 13:04:57,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:04:57,071 INFO L82 PathProgramCache]: Analyzing trace with hash 943411592, now seen corresponding path program 1 times [2019-12-07 13:04:57,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:04:57,071 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976608254] [2019-12-07 13:04:57,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:04:57,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 13:04:57,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 13:04:57,081 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 13:04:57,145 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 13:04:57,146 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 13:04:57,146 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 13:04:57,146 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 13:04:57,146 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 13:04:57,146 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 13:04:57,146 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 13:04:57,146 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 13:04:57,147 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration1_Loop [2019-12-07 13:04:57,147 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 13:04:57,147 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 13:04:57,159 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 13:04:57,164 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 13:04:57,167 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 13:04:57,168 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 13:04:57,171 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 13:04:57,226 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 13:04:57,226 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0ca05433-3ceb-4204-a9b9-02cf1492887f/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 [2019-12-07 13:04:57,231 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 13:04:57,231 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 13:04:57,237 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 13:04:57,238 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_0ca05433-3ceb-4204-a9b9-02cf1492887f/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 [2019-12-07 13:04:57,243 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 13:04:57,243 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 13:04:57,245 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 13:04:57,246 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_0ca05433-3ceb-4204-a9b9-02cf1492887f/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 [2019-12-07 13:04:57,249 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 13:04:57,249 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 13:04:57,252 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 13:04:57,252 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_0ca05433-3ceb-4204-a9b9-02cf1492887f/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 [2019-12-07 13:04:57,256 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 13:04:57,256 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 13:04:57,259 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 13:04:57,260 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_0ca05433-3ceb-4204-a9b9-02cf1492887f/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 [2019-12-07 13:04:57,263 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 13:04:57,263 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0ca05433-3ceb-4204-a9b9-02cf1492887f/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 [2019-12-07 13:04:57,271 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 13:04:57,271 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 13:04:57,277 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-12-07 13:04:57,278 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 13:04:57,278 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 13:04:57,278 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 13:04:57,278 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 13:04:57,278 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 13:04:57,279 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 13:04:57,279 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 13:04:57,279 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 13:04:57,279 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration1_Loop [2019-12-07 13:04:57,279 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 13:04:57,279 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 13:04:57,280 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 13:04:57,282 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 13:04:57,285 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 13:04:57,287 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 13:04:57,289 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 13:04:57,326 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 13:04:57,329 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0ca05433-3ceb-4204-a9b9-02cf1492887f/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) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 13:04:57,333 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 [2019-12-07 13:04:57,334 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 13:04:57,334 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 13:04:57,335 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 13:04:57,335 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 13:04:57,335 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 13:04:57,336 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 13:04:57,337 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 13:04:57,338 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0ca05433-3ceb-4204-a9b9-02cf1492887f/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) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 13:04:57,342 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 [2019-12-07 13:04:57,343 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 13:04:57,343 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 13:04:57,343 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 13:04:57,343 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 13:04:57,343 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 13:04:57,344 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 13:04:57,344 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 13:04:57,345 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0ca05433-3ceb-4204-a9b9-02cf1492887f/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 13:04:57,349 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 [2019-12-07 13:04:57,350 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 13:04:57,350 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 13:04:57,350 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 13:04:57,350 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 13:04:57,351 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 13:04:57,351 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 13:04:57,351 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 13:04:57,353 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0ca05433-3ceb-4204-a9b9-02cf1492887f/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) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 13:04:57,356 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 [2019-12-07 13:04:57,358 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 13:04:57,358 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 13:04:57,358 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 13:04:57,358 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 13:04:57,358 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 13:04:57,359 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 13:04:57,359 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 13:04:57,360 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0ca05433-3ceb-4204-a9b9-02cf1492887f/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) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 13:04:57,365 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 [2019-12-07 13:04:57,366 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 13:04:57,366 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 13:04:57,366 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 13:04:57,367 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 13:04:57,367 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 13:04:57,367 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 13:04:57,368 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 13:04:57,370 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 13:04:57,373 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-12-07 13:04:57,373 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_0ca05433-3ceb-4204-a9b9-02cf1492887f/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 [2019-12-07 13:04:57,377 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 13:04:57,377 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-12-07 13:04:57,377 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 13:04:57,377 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2019-12-07 13:04:57,380 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-12-07 13:04:57,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:04:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:04:57,409 INFO L264 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 13:04:57,410 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:04:57,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:04:57,424 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 13:04:57,425 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:04:57,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:04:57,455 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 [2019-12-07 13:04:57,456 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states. Second operand 4 states. [2019-12-07 13:04:57,532 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. [2019-12-07 13:04:57,532 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 [2019-12-07 13:04:57,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-12-07 13:04:57,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2019-12-07 13:04:57,535 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 4 letters. [2019-12-07 13:04:57,536 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 13:04:57,536 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 6 letters. Loop has 4 letters. [2019-12-07 13:04:57,536 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 13:04:57,536 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 8 letters. [2019-12-07 13:04:57,537 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 13:04:57,537 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 47 states and 59 transitions. [2019-12-07 13:04:57,540 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-12-07 13:04:57,545 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 47 states to 24 states and 33 transitions. [2019-12-07 13:04:57,546 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2019-12-07 13:04:57,546 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2019-12-07 13:04:57,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 33 transitions. [2019-12-07 13:04:57,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 13:04:57,548 INFO L688 BuchiCegarLoop]: Abstraction has 24 states and 33 transitions. [2019-12-07 13:04:57,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 33 transitions. [2019-12-07 13:04:57,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2019-12-07 13:04:57,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-12-07 13:04:57,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2019-12-07 13:04:57,568 INFO L711 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-12-07 13:04:57,568 INFO L591 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-12-07 13:04:57,568 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-12-07 13:04:57,568 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 25 transitions. [2019-12-07 13:04:57,569 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-12-07 13:04:57,569 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 13:04:57,569 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 13:04:57,570 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:04:57,570 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:04:57,570 INFO L794 eck$LassoCheckResult]: Stem: 120#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 121#L25 call main_#t~ret2 := fibo(main_~x~0);< 125#fiboENTRY ~n := #in~n; 126#L6 assume !(~n < 1); 124#L8 assume !(1 == ~n); 118#L11 call #t~ret0 := fibo(~n - 1);< 127#fiboENTRY ~n := #in~n; 128#L6 assume ~n < 1;#res := 0; 123#fiboFINAL assume true; 117#fiboEXIT >#32#return; 119#L11-1 [2019-12-07 13:04:57,570 INFO L796 eck$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 [2019-12-07 13:04:57,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:04:57,571 INFO L82 PathProgramCache]: Analyzing trace with hash 531553871, now seen corresponding path program 1 times [2019-12-07 13:04:57,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:04:57,571 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730903258] [2019-12-07 13:04:57,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:04:57,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:04:57,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:04:57,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:04:57,631 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730903258] [2019-12-07 13:04:57,632 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098024260] [2019-12-07 13:04:57,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0ca05433-3ceb-4204-a9b9-02cf1492887f/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 [2019-12-07 13:04:57,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:04:57,648 INFO L264 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 13:04:57,648 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:04:57,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:04:57,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:04:57,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-07 13:04:57,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676542449] [2019-12-07 13:04:57,663 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-12-07 13:04:57,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:04:57,664 INFO L82 PathProgramCache]: Analyzing trace with hash -606345326, now seen corresponding path program 1 times [2019-12-07 13:04:57,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:04:57,664 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832002262] [2019-12-07 13:04:57,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:04:57,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:04:57,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:04:57,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 13:04:57,695 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832002262] [2019-12-07 13:04:57,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:04:57,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 13:04:57,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727069687] [2019-12-07 13:04:57,696 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-12-07 13:04:57,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:04:57,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 13:04:57,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-12-07 13:04:57,699 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. cyclomatic complexity: 8 Second operand 6 states. [2019-12-07 13:04:57,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:04:57,748 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2019-12-07 13:04:57,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 13:04:57,749 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 31 transitions. [2019-12-07 13:04:57,750 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-12-07 13:04:57,752 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 23 states and 29 transitions. [2019-12-07 13:04:57,752 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2019-12-07 13:04:57,752 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2019-12-07 13:04:57,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 29 transitions. [2019-12-07 13:04:57,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 13:04:57,753 INFO L688 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-12-07 13:04:57,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 29 transitions. [2019-12-07 13:04:57,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-12-07 13:04:57,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-12-07 13:04:57,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2019-12-07 13:04:57,757 INFO L711 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-12-07 13:04:57,757 INFO L591 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-12-07 13:04:57,757 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-12-07 13:04:57,757 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 29 transitions. [2019-12-07 13:04:57,758 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-12-07 13:04:57,758 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 13:04:57,758 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 13:04:57,759 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:04:57,759 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 13:04:57,759 INFO L794 eck$LassoCheckResult]: Stem: 220#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 221#L25 call main_#t~ret2 := fibo(main_~x~0);< 225#fiboENTRY ~n := #in~n; 226#L6 assume !(~n < 1); 224#L8 assume !(1 == ~n); 218#L11 call #t~ret0 := fibo(~n - 1);< 227#fiboENTRY ~n := #in~n; 228#L6 assume !(~n < 1); 222#L8 assume 1 == ~n;#res := 1; 223#fiboFINAL assume true; 217#fiboEXIT >#32#return; 219#L11-1 [2019-12-07 13:04:57,759 INFO L796 eck$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 [2019-12-07 13:04:57,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:04:57,760 INFO L82 PathProgramCache]: Analyzing trace with hash -701674289, now seen corresponding path program 1 times [2019-12-07 13:04:57,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:04:57,760 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105155188] [2019-12-07 13:04:57,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:04:57,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:04:57,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:04:57,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:04:57,798 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105155188] [2019-12-07 13:04:57,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566942650] [2019-12-07 13:04:57,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0ca05433-3ceb-4204-a9b9-02cf1492887f/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 [2019-12-07 13:04:57,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:04:57,816 INFO L264 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 13:04:57,816 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:04:57,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:04:57,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:04:57,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-07 13:04:57,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532059182] [2019-12-07 13:04:57,826 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-12-07 13:04:57,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:04:57,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1616811028, now seen corresponding path program 1 times [2019-12-07 13:04:57,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:04:57,827 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147513844] [2019-12-07 13:04:57,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:04:57,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 13:04:57,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 13:04:57,834 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 13:04:57,911 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 13:04:57,912 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 13:04:57,912 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 13:04:57,912 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 13:04:57,912 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 13:04:57,912 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 13:04:57,912 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 13:04:57,912 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 13:04:57,912 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration3_Loop [2019-12-07 13:04:57,912 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 13:04:57,913 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 13:04:57,913 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 13:04:57,918 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 13:04:57,920 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 13:04:57,922 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 13:04:57,951 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 13:04:57,951 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0ca05433-3ceb-4204-a9b9-02cf1492887f/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) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 13:04:57,954 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 13:04:57,954 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0ca05433-3ceb-4204-a9b9-02cf1492887f/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) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 13:04:57,964 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 13:04:57,964 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 13:04:58,348 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-12-07 13:04:58,350 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 13:04:58,350 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 13:04:58,351 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 13:04:58,351 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 13:04:58,351 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 13:04:58,351 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 13:04:58,351 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 13:04:58,351 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 13:04:58,351 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration3_Loop [2019-12-07 13:04:58,351 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 13:04:58,351 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 13:04:58,352 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 13:04:58,355 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 13:04:58,363 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 13:04:58,364 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 13:04:58,392 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 13:04:58,392 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0ca05433-3ceb-4204-a9b9-02cf1492887f/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 13:04:58,395 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 [2019-12-07 13:04:58,397 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 13:04:58,397 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 13:04:58,397 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 13:04:58,397 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 13:04:58,397 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 13:04:58,398 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 13:04:58,398 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 13:04:58,399 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0ca05433-3ceb-4204-a9b9-02cf1492887f/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 [2019-12-07 13:04:58,404 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 [2019-12-07 13:04:58,405 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 13:04:58,406 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 13:04:58,406 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 13:04:58,406 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 13:04:58,406 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 13:04:58,407 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 13:04:58,408 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 13:04:58,410 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 13:04:58,413 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-12-07 13:04:58,413 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_0ca05433-3ceb-4204-a9b9-02cf1492887f/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 [2019-12-07 13:04:58,415 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 13:04:58,416 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-12-07 13:04:58,416 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 13:04:58,416 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-12-07 13:04:58,418 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-12-07 13:04:58,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:04:58,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:04:58,437 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 13:04:58,438 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:04:58,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:04:58,462 INFO L264 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-07 13:04:58,463 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:04:58,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:04:58,507 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 [2019-12-07 13:04:58,507 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8 Second operand 7 states. [2019-12-07 13:04:58,602 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. [2019-12-07 13:04:58,602 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 [2019-12-07 13:04:58,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-12-07 13:04:58,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 34 transitions. [2019-12-07 13:04:58,603 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 10 letters. [2019-12-07 13:04:58,603 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 13:04:58,604 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 21 letters. Loop has 10 letters. [2019-12-07 13:04:58,604 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 13:04:58,604 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 20 letters. [2019-12-07 13:04:58,605 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 13:04:58,605 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 134 states and 182 transitions. [2019-12-07 13:04:58,610 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-12-07 13:04:58,614 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 134 states to 107 states and 151 transitions. [2019-12-07 13:04:58,614 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 63 [2019-12-07 13:04:58,615 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2019-12-07 13:04:58,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 151 transitions. [2019-12-07 13:04:58,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 13:04:58,615 INFO L688 BuchiCegarLoop]: Abstraction has 107 states and 151 transitions. [2019-12-07 13:04:58,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states and 151 transitions. [2019-12-07 13:04:58,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2019-12-07 13:04:58,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-12-07 13:04:58,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2019-12-07 13:04:58,625 INFO L711 BuchiCegarLoop]: Abstraction has 93 states and 125 transitions. [2019-12-07 13:04:58,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:04:58,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 13:04:58,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-12-07 13:04:58,626 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand 8 states. [2019-12-07 13:04:58,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:04:58,677 INFO L93 Difference]: Finished difference Result 108 states and 146 transitions. [2019-12-07 13:04:58,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 13:04:58,677 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 108 states and 146 transitions. [2019-12-07 13:04:58,680 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-12-07 13:04:58,683 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 108 states to 105 states and 143 transitions. [2019-12-07 13:04:58,683 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 68 [2019-12-07 13:04:58,684 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2019-12-07 13:04:58,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 143 transitions. [2019-12-07 13:04:58,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 13:04:58,684 INFO L688 BuchiCegarLoop]: Abstraction has 105 states and 143 transitions. [2019-12-07 13:04:58,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states and 143 transitions. [2019-12-07 13:04:58,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2019-12-07 13:04:58,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-12-07 13:04:58,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 124 transitions. [2019-12-07 13:04:58,692 INFO L711 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2019-12-07 13:04:58,692 INFO L591 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2019-12-07 13:04:58,692 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-12-07 13:04:58,692 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 93 states and 124 transitions. [2019-12-07 13:04:58,693 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-12-07 13:04:58,694 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 13:04:58,694 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 13:04:58,695 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:04:58,695 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2019-12-07 13:04:58,695 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~ret0;havoc #t~ret1; 812#fiboFINAL assume true; 802#fiboEXIT >#32#return; 804#L11-1 [2019-12-07 13:04:58,695 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~ret0;havoc #t~ret1; 811#fiboFINAL assume true; 807#fiboEXIT >#34#return; 809#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 811#fiboFINAL assume true; 807#fiboEXIT >#32#return; 804#L11-1 [2019-12-07 13:04:58,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:04:58,695 INFO L82 PathProgramCache]: Analyzing trace with hash -240562386, now seen corresponding path program 1 times [2019-12-07 13:04:58,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:04:58,696 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516918652] [2019-12-07 13:04:58,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:04:58,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:04:58,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:04:58,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:04:58,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:04:58,771 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-07 13:04:58,772 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516918652] [2019-12-07 13:04:58,772 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760054010] [2019-12-07 13:04:58,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0ca05433-3ceb-4204-a9b9-02cf1492887f/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 [2019-12-07 13:04:58,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:04:58,792 INFO L264 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 13:04:58,793 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:04:58,805 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-07 13:04:58,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:04:58,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-12-07 13:04:58,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552852007] [2019-12-07 13:04:58,806 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-12-07 13:04:58,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:04:58,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1408722332, now seen corresponding path program 1 times [2019-12-07 13:04:58,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:04:58,807 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794129712] [2019-12-07 13:04:58,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:04:58,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:04:58,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:04:58,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:04:58,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:04:58,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:04:58,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:04:58,877 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 26 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-12-07 13:04:58,878 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794129712] [2019-12-07 13:04:58,878 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184304665] [2019-12-07 13:04:58,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0ca05433-3ceb-4204-a9b9-02cf1492887f/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 [2019-12-07 13:04:58,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:04:58,899 INFO L264 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 13:04:58,900 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:04:58,917 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-12-07 13:04:58,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:04:58,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-12-07 13:04:58,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374750728] [2019-12-07 13:04:58,918 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-12-07 13:04:58,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:04:58,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 13:04:58,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-12-07 13:04:58,919 INFO L87 Difference]: Start difference. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 12 states. [2019-12-07 13:04:59,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:04:59,056 INFO L93 Difference]: Finished difference Result 115 states and 158 transitions. [2019-12-07 13:04:59,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 13:04:59,056 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 115 states and 158 transitions. [2019-12-07 13:04:59,060 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2019-12-07 13:04:59,063 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 115 states to 113 states and 156 transitions. [2019-12-07 13:04:59,063 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 76 [2019-12-07 13:04:59,063 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 76 [2019-12-07 13:04:59,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 113 states and 156 transitions. [2019-12-07 13:04:59,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 13:04:59,064 INFO L688 BuchiCegarLoop]: Abstraction has 113 states and 156 transitions. [2019-12-07 13:04:59,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states and 156 transitions. [2019-12-07 13:04:59,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2019-12-07 13:04:59,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-12-07 13:04:59,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 156 transitions. [2019-12-07 13:04:59,073 INFO L711 BuchiCegarLoop]: Abstraction has 113 states and 156 transitions. [2019-12-07 13:04:59,074 INFO L591 BuchiCegarLoop]: Abstraction has 113 states and 156 transitions. [2019-12-07 13:04:59,074 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-12-07 13:04:59,074 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 113 states and 156 transitions. [2019-12-07 13:04:59,076 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2019-12-07 13:04:59,076 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 13:04:59,076 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 13:04:59,077 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:04:59,077 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2019-12-07 13:04:59,078 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~ret0;havoc #t~ret1; 1339#fiboFINAL assume true; 1332#fiboEXIT >#32#return; 1260#L11-1 [2019-12-07 13:04:59,078 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~ret0;havoc #t~ret1; 1258#fiboFINAL assume true; 1264#fiboEXIT >#32#return; 1260#L11-1 [2019-12-07 13:04:59,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:04:59,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1087292419, now seen corresponding path program 2 times [2019-12-07 13:04:59,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:04:59,078 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964371457] [2019-12-07 13:04:59,078 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:04:59,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 13:04:59,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 13:04:59,089 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 13:04:59,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:04:59,089 INFO L82 PathProgramCache]: Analyzing trace with hash 22774646, now seen corresponding path program 2 times [2019-12-07 13:04:59,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:04:59,090 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161313161] [2019-12-07 13:04:59,090 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:04:59,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 13:04:59,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 13:04:59,097 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 13:04:59,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:04:59,097 INFO L82 PathProgramCache]: Analyzing trace with hash 560101880, now seen corresponding path program 3 times [2019-12-07 13:04:59,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:04:59,097 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195342363] [2019-12-07 13:04:59,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:04:59,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:04:59,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:04:59,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:04:59,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:04:59,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:04:59,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:04:59,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:04:59,185 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 52 proven. 67 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-12-07 13:04:59,185 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195342363] [2019-12-07 13:04:59,185 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878823089] [2019-12-07 13:04:59,185 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0ca05433-3ceb-4204-a9b9-02cf1492887f/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 [2019-12-07 13:04:59,210 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-12-07 13:04:59,210 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:04:59,211 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-07 13:04:59,212 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:04:59,236 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 63 proven. 69 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-12-07 13:04:59,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:04:59,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2019-12-07 13:04:59,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964926855] [2019-12-07 13:04:59,387 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 13:04:59,387 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 13:04:59,387 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 13:04:59,387 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 13:04:59,387 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 13:04:59,387 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 13:04:59,387 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 13:04:59,387 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 13:04:59,387 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration5_Loop [2019-12-07 13:04:59,387 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 13:04:59,387 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 13:04:59,388 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 13:04:59,390 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 13:04:59,391 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 13:04:59,392 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 13:04:59,436 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 13:04:59,436 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0ca05433-3ceb-4204-a9b9-02cf1492887f/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 [2019-12-07 13:04:59,438 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 13:04:59,439 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 13:04:59,442 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 13:04:59,442 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_0ca05433-3ceb-4204-a9b9-02cf1492887f/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 [2019-12-07 13:04:59,446 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 13:04:59,446 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 13:04:59,449 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 13:04:59,449 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_0ca05433-3ceb-4204-a9b9-02cf1492887f/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 [2019-12-07 13:04:59,453 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 13:04:59,454 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 13:04:59,456 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 13:04:59,456 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_0ca05433-3ceb-4204-a9b9-02cf1492887f/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 [2019-12-07 13:04:59,461 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 13:04:59,461 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0ca05433-3ceb-4204-a9b9-02cf1492887f/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 [2019-12-07 13:04:59,468 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 13:04:59,468 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 13:04:59,980 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-12-07 13:04:59,983 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 13:04:59,983 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 13:04:59,983 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 13:04:59,983 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 13:04:59,983 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 13:04:59,983 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 13:04:59,983 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 13:04:59,983 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 13:04:59,983 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration5_Loop [2019-12-07 13:04:59,983 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 13:04:59,983 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 13:04:59,984 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 13:04:59,986 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 13:04:59,987 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 13:04:59,994 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 13:05:00,034 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 13:05:00,034 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0ca05433-3ceb-4204-a9b9-02cf1492887f/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 [2019-12-07 13:05:00,037 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 [2019-12-07 13:05:00,038 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 13:05:00,038 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 13:05:00,038 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 13:05:00,038 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 13:05:00,038 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 13:05:00,038 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 13:05:00,038 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 13:05:00,040 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0ca05433-3ceb-4204-a9b9-02cf1492887f/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 [2019-12-07 13:05:00,044 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 [2019-12-07 13:05:00,045 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 13:05:00,045 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 13:05:00,045 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 13:05:00,045 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 13:05:00,045 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 13:05:00,046 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 13:05:00,046 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 13:05:00,047 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0ca05433-3ceb-4204-a9b9-02cf1492887f/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 [2019-12-07 13:05:00,051 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 [2019-12-07 13:05:00,052 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 13:05:00,052 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 13:05:00,052 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 13:05:00,052 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 13:05:00,052 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 13:05:00,053 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 13:05:00,053 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 13:05:00,055 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 13:05:00,057 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-12-07 13:05:00,057 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_0ca05433-3ceb-4204-a9b9-02cf1492887f/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) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 13:05:00,064 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 13:05:00,064 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-12-07 13:05:00,064 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 13:05:00,064 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-12-07 13:05:00,066 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-12-07 13:05:00,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:05:00,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:05:00,104 INFO L264 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-07 13:05:00,106 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:05:00,120 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:05:00,123 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:05:00,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:05:00,142 INFO L264 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-07 13:05:00,143 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:05:00,186 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-07 13:05:00,187 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 [2019-12-07 13:05:00,187 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 156 transitions. cyclomatic complexity: 49 Second operand 8 states. [2019-12-07 13:05:00,307 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. [2019-12-07 13:05:00,308 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 [2019-12-07 13:05:00,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-12-07 13:05:00,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 36 transitions. [2019-12-07 13:05:00,308 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 36 transitions. Stem has 31 letters. Loop has 22 letters. [2019-12-07 13:05:00,309 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 13:05:00,309 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-12-07 13:05:00,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:05:00,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:05:00,335 INFO L264 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-07 13:05:00,336 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:05:00,348 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:05:00,350 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:05:00,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:05:00,364 INFO L264 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-07 13:05:00,365 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:05:00,401 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-07 13:05:00,401 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 [2019-12-07 13:05:00,401 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 156 transitions. cyclomatic complexity: 49 Second operand 8 states. [2019-12-07 13:05:00,506 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. [2019-12-07 13:05:00,507 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 [2019-12-07 13:05:00,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-12-07 13:05:00,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 23 transitions. [2019-12-07 13:05:00,507 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 23 transitions. Stem has 31 letters. Loop has 22 letters. [2019-12-07 13:05:00,507 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 13:05:00,508 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-12-07 13:05:00,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:05:00,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:05:00,538 INFO L264 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-07 13:05:00,539 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:05:00,553 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:05:00,554 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:05:00,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:05:00,570 INFO L264 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-07 13:05:00,571 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:05:00,609 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-07 13:05:00,610 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 [2019-12-07 13:05:00,610 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 156 transitions. cyclomatic complexity: 49 Second operand 8 states. [2019-12-07 13:05:00,753 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. [2019-12-07 13:05:00,753 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 [2019-12-07 13:05:00,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-12-07 13:05:00,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 41 transitions. [2019-12-07 13:05:00,754 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 31 letters. Loop has 22 letters. [2019-12-07 13:05:00,755 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 13:05:00,755 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 53 letters. Loop has 22 letters. [2019-12-07 13:05:00,757 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 13:05:00,757 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 31 letters. Loop has 44 letters. [2019-12-07 13:05:00,758 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 13:05:00,758 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1077 states and 1514 transitions. [2019-12-07 13:05:00,776 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 58 [2019-12-07 13:05:00,791 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1077 states to 604 states and 937 transitions. [2019-12-07 13:05:00,792 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 242 [2019-12-07 13:05:00,793 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 271 [2019-12-07 13:05:00,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 604 states and 937 transitions. [2019-12-07 13:05:00,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 13:05:00,794 INFO L688 BuchiCegarLoop]: Abstraction has 604 states and 937 transitions. [2019-12-07 13:05:00,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states and 937 transitions. [2019-12-07 13:05:00,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 475. [2019-12-07 13:05:00,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 475 states. [2019-12-07 13:05:00,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 723 transitions. [2019-12-07 13:05:00,824 INFO L711 BuchiCegarLoop]: Abstraction has 475 states and 723 transitions. [2019-12-07 13:05:00,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:05:00,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-07 13:05:00,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2019-12-07 13:05:00,824 INFO L87 Difference]: Start difference. First operand 475 states and 723 transitions. Second operand 16 states. [2019-12-07 13:05:01,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:05:01,043 INFO L93 Difference]: Finished difference Result 150 states and 188 transitions. [2019-12-07 13:05:01,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-07 13:05:01,044 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 150 states and 188 transitions. [2019-12-07 13:05:01,046 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-12-07 13:05:01,047 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 150 states to 150 states and 188 transitions. [2019-12-07 13:05:01,047 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 80 [2019-12-07 13:05:01,048 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 105 [2019-12-07 13:05:01,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 150 states and 188 transitions. [2019-12-07 13:05:01,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 13:05:01,048 INFO L688 BuchiCegarLoop]: Abstraction has 150 states and 188 transitions. [2019-12-07 13:05:01,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states and 188 transitions. [2019-12-07 13:05:01,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 121. [2019-12-07 13:05:01,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-12-07 13:05:01,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 142 transitions. [2019-12-07 13:05:01,052 INFO L711 BuchiCegarLoop]: Abstraction has 121 states and 142 transitions. [2019-12-07 13:05:01,052 INFO L591 BuchiCegarLoop]: Abstraction has 121 states and 142 transitions. [2019-12-07 13:05:01,052 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-12-07 13:05:01,052 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 121 states and 142 transitions. [2019-12-07 13:05:01,052 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-12-07 13:05:01,053 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 13:05:01,053 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 13:05:01,054 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [9, 7, 6, 6, 5, 3, 3, 2, 2, 2, 1, 1, 1] [2019-12-07 13:05:01,054 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-12-07 13:05:01,054 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~ret0;havoc #t~ret1; 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~ret0;havoc #t~ret1; 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 [2019-12-07 13:05:01,054 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 [2019-12-07 13:05:01,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:05:01,055 INFO L82 PathProgramCache]: Analyzing trace with hash -918730881, now seen corresponding path program 4 times [2019-12-07 13:05:01,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:05:01,055 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141956438] [2019-12-07 13:05:01,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:05:01,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:05:01,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:05:01,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:05:01,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:05:01,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:05:01,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:05:01,150 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 73 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-12-07 13:05:01,151 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141956438] [2019-12-07 13:05:01,151 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792520164] [2019-12-07 13:05:01,151 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0ca05433-3ceb-4204-a9b9-02cf1492887f/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 [2019-12-07 13:05:01,172 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 13:05:01,173 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:05:01,173 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 13:05:01,174 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:05:01,240 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 65 proven. 42 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-12-07 13:05:01,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:05:01,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2019-12-07 13:05:01,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340701978] [2019-12-07 13:05:01,242 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-12-07 13:05:01,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:05:01,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 2 times [2019-12-07 13:05:01,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:05:01,242 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762160453] [2019-12-07 13:05:01,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:05:01,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 13:05:01,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 13:05:01,246 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 13:05:01,267 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 13:05:01,268 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 13:05:01,268 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 13:05:01,268 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 13:05:01,268 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 13:05:01,268 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 13:05:01,268 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 13:05:01,268 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 13:05:01,268 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration6_Loop [2019-12-07 13:05:01,268 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 13:05:01,268 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 13:05:01,269 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 13:05:01,270 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 13:05:01,271 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 13:05:01,272 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 13:05:01,277 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 13:05:01,302 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 13:05:01,303 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0ca05433-3ceb-4204-a9b9-02cf1492887f/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) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 13:05:01,313 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 13:05:01,313 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 13:05:01,316 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 13:05:01,316 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_0ca05433-3ceb-4204-a9b9-02cf1492887f/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 [2019-12-07 13:05:01,320 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 13:05:01,320 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 13:05:01,322 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 13:05:01,322 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_0ca05433-3ceb-4204-a9b9-02cf1492887f/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) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 13:05:01,326 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 13:05:01,327 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 13:05:01,330 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 13:05:01,330 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_0ca05433-3ceb-4204-a9b9-02cf1492887f/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 [2019-12-07 13:05:01,336 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 13:05:01,336 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0ca05433-3ceb-4204-a9b9-02cf1492887f/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 [2019-12-07 13:05:01,343 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 13:05:01,343 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 13:05:01,393 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-12-07 13:05:01,395 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 13:05:01,395 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 13:05:01,395 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 13:05:01,395 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 13:05:01,395 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 13:05:01,395 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 13:05:01,395 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 13:05:01,395 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 13:05:01,395 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration6_Loop [2019-12-07 13:05:01,396 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 13:05:01,396 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 13:05:01,396 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 13:05:01,398 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 13:05:01,399 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 13:05:01,400 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 13:05:01,404 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 13:05:01,428 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 13:05:01,429 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0ca05433-3ceb-4204-a9b9-02cf1492887f/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 [2019-12-07 13:05:01,432 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 [2019-12-07 13:05:01,433 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 13:05:01,433 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 13:05:01,433 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 13:05:01,433 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 13:05:01,433 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 13:05:01,434 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 13:05:01,434 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 13:05:01,435 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0ca05433-3ceb-4204-a9b9-02cf1492887f/bin/uautomizer/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 13:05:01,443 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 [2019-12-07 13:05:01,445 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 13:05:01,445 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 13:05:01,445 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 13:05:01,445 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 13:05:01,445 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 13:05:01,445 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 13:05:01,445 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 13:05:01,447 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0ca05433-3ceb-4204-a9b9-02cf1492887f/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 [2019-12-07 13:05:01,451 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 [2019-12-07 13:05:01,453 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 13:05:01,453 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 13:05:01,453 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 13:05:01,453 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 13:05:01,453 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 13:05:01,453 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 13:05:01,453 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 13:05:01,454 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0ca05433-3ceb-4204-a9b9-02cf1492887f/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 [2019-12-07 13:05:01,458 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 [2019-12-07 13:05:01,459 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 13:05:01,459 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 13:05:01,459 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 13:05:01,460 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 13:05:01,460 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 13:05:01,460 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 13:05:01,460 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 13:05:01,462 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 13:05:01,464 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-12-07 13:05:01,465 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_0ca05433-3ceb-4204-a9b9-02cf1492887f/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 [2019-12-07 13:05:01,467 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 13:05:01,468 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-12-07 13:05:01,468 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 13:05:01,468 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2019-12-07 13:05:01,469 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-12-07 13:05:01,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:05:01,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:05:01,511 INFO L264 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-07 13:05:01,512 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:05:01,525 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:05:01,526 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:05:01,527 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:05:01,528 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:05:01,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:05:01,534 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 13:05:01,534 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:05:01,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:05:01,546 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 [2019-12-07 13:05:01,546 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 121 states and 142 transitions. cyclomatic complexity: 24 Second operand 5 states. [2019-12-07 13:05:01,584 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. [2019-12-07 13:05:01,584 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 [2019-12-07 13:05:01,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-12-07 13:05:01,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2019-12-07 13:05:01,585 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 48 letters. Loop has 4 letters. [2019-12-07 13:05:01,585 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 13:05:01,585 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-12-07 13:05:01,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:05:01,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:05:01,622 INFO L264 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-07 13:05:01,623 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:05:01,636 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:05:01,637 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:05:01,638 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:05:01,639 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:05:01,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:05:01,645 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 13:05:01,645 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:05:01,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:05:01,657 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 [2019-12-07 13:05:01,657 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 121 states and 142 transitions. cyclomatic complexity: 24 Second operand 5 states. [2019-12-07 13:05:01,694 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. [2019-12-07 13:05:01,694 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 [2019-12-07 13:05:01,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-12-07 13:05:01,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2019-12-07 13:05:01,695 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 48 letters. Loop has 4 letters. [2019-12-07 13:05:01,695 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 13:05:01,695 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-12-07 13:05:01,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:05:01,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:05:01,733 INFO L264 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-07 13:05:01,734 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:05:01,746 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:05:01,747 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:05:01,748 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:05:01,749 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:05:01,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:05:01,754 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 13:05:01,754 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:05:01,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:05:01,765 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 [2019-12-07 13:05:01,765 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 121 states and 142 transitions. cyclomatic complexity: 24 Second operand 5 states. [2019-12-07 13:05:01,813 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. [2019-12-07 13:05:01,813 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 [2019-12-07 13:05:01,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-12-07 13:05:01,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 20 transitions. [2019-12-07 13:05:01,814 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 48 letters. Loop has 4 letters. [2019-12-07 13:05:01,814 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 13:05:01,814 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 52 letters. Loop has 4 letters. [2019-12-07 13:05:01,815 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 13:05:01,815 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 48 letters. Loop has 8 letters. [2019-12-07 13:05:01,815 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 13:05:01,815 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 170 states and 193 transitions. [2019-12-07 13:05:01,817 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-12-07 13:05:01,817 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 170 states to 0 states and 0 transitions. [2019-12-07 13:05:01,817 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-12-07 13:05:01,817 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-12-07 13:05:01,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-12-07 13:05:01,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-12-07 13:05:01,817 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 13:05:01,817 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 13:05:01,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:05:01,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-07 13:05:01,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2019-12-07 13:05:01,818 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 19 states. [2019-12-07 13:05:01,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:05:01,818 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2019-12-07 13:05:01,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 13:05:01,818 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2019-12-07 13:05:01,818 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-12-07 13:05:01,818 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 13:05:01,818 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-12-07 13:05:01,818 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-12-07 13:05:01,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-12-07 13:05:01,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-12-07 13:05:01,818 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 13:05:01,819 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 13:05:01,819 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 13:05:01,819 INFO L424 BuchiCegarLoop]: ======== Iteration 7============ [2019-12-07 13:05:01,819 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-12-07 13:05:01,819 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-12-07 13:05:01,819 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-12-07 13:05:01,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 07.12 01:05:01 BoogieIcfgContainer [2019-12-07 13:05:01,824 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-12-07 13:05:01,825 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 13:05:01,825 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 13:05:01,825 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 13:05:01,825 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:04:56" (3/4) ... [2019-12-07 13:05:01,828 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-12-07 13:05:01,829 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 13:05:01,830 INFO L168 Benchmark]: Toolchain (without parser) took 5267.89 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.0 MB). Free memory was 938.0 MB in the beginning and 970.0 MB in the end (delta: -32.0 MB). Peak memory consumption was 97.0 MB. Max. memory is 11.5 GB. [2019-12-07 13:05:01,831 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 960.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:05:01,831 INFO L168 Benchmark]: CACSL2BoogieTranslator took 166.35 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 71.8 MB). Free memory was 938.0 MB in the beginning and 1.1 GB in the end (delta: -131.3 MB). Peak memory consumption was 23.4 MB. Max. memory is 11.5 GB. [2019-12-07 13:05:01,832 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.88 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:05:01,832 INFO L168 Benchmark]: Boogie Preprocessor took 12.31 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:05:01,833 INFO L168 Benchmark]: RCFGBuilder took 143.99 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 11.5 GB. [2019-12-07 13:05:01,833 INFO L168 Benchmark]: BuchiAutomizer took 4915.81 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 57.1 MB). Free memory was 1.0 GB in the beginning and 970.0 MB in the end (delta: 78.7 MB). Peak memory consumption was 135.9 MB. Max. memory is 11.5 GB. [2019-12-07 13:05:01,833 INFO L168 Benchmark]: Witness Printer took 4.00 ms. Allocated memory is still 1.2 GB. Free memory is still 970.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:05:01,836 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 960.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 166.35 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 71.8 MB). Free memory was 938.0 MB in the beginning and 1.1 GB in the end (delta: -131.3 MB). Peak memory consumption was 23.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 21.88 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.31 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 143.99 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 4915.81 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 57.1 MB). Free memory was 1.0 GB in the beginning and 970.0 MB in the end (delta: 78.7 MB). Peak memory consumption was 135.9 MB. Max. memory is 11.5 GB. * Witness Printer took 4.00 ms. Allocated memory is still 1.2 GB. Free memory is still 970.0 MB. 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 4.8s and 7 iterations. TraceHistogramMax:9. Analysis of lassos took 2.8s. Construction of modules took 0.4s. Büchi inclusion checks took 1.4s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 7. Automata minimization 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 189 StatesRemovedByMinimization, 5 NontrivialMinimizations. Non-live state removal took 0.0s 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, 0.4s 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: 8ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 10 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...