./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_5-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_572eab91-9a4f-41ea-96a9-98c006e27ce1/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_572eab91-9a4f-41ea-96a9-98c006e27ce1/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_572eab91-9a4f-41ea-96a9-98c006e27ce1/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_572eab91-9a4f-41ea-96a9-98c006e27ce1/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_5-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_572eab91-9a4f-41ea-96a9-98c006e27ce1/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_572eab91-9a4f-41ea-96a9-98c006e27ce1/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 c7b71b458b3f08f188a62c7539b715f43fd7f97d ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-6b5699a [2019-11-25 08:49:09,473 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-25 08:49:09,475 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-25 08:49:09,488 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-25 08:49:09,489 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-25 08:49:09,490 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-25 08:49:09,491 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-25 08:49:09,500 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-25 08:49:09,504 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-25 08:49:09,507 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-25 08:49:09,508 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-25 08:49:09,509 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-25 08:49:09,509 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-25 08:49:09,511 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-25 08:49:09,512 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-25 08:49:09,513 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-25 08:49:09,514 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-25 08:49:09,514 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-25 08:49:09,517 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-25 08:49:09,520 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-25 08:49:09,523 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-25 08:49:09,526 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-25 08:49:09,528 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-25 08:49:09,529 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-25 08:49:09,531 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-25 08:49:09,532 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-25 08:49:09,532 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-25 08:49:09,533 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-25 08:49:09,534 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-25 08:49:09,534 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-25 08:49:09,534 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-25 08:49:09,535 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-25 08:49:09,536 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-25 08:49:09,536 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-25 08:49:09,537 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-25 08:49:09,537 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-25 08:49:09,538 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-25 08:49:09,538 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-25 08:49:09,538 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-25 08:49:09,539 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-25 08:49:09,540 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-25 08:49:09,541 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_572eab91-9a4f-41ea-96a9-98c006e27ce1/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2019-11-25 08:49:09,565 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-25 08:49:09,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-25 08:49:09,576 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-25 08:49:09,576 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-25 08:49:09,576 INFO L138 SettingsManager]: * Use SBE=true [2019-11-25 08:49:09,577 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-25 08:49:09,577 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-25 08:49:09,577 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-25 08:49:09,577 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-25 08:49:09,577 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-25 08:49:09,578 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-25 08:49:09,578 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-25 08:49:09,578 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-25 08:49:09,578 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-25 08:49:09,579 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-25 08:49:09,579 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-25 08:49:09,580 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-25 08:49:09,580 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-25 08:49:09,580 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-25 08:49:09,580 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-25 08:49:09,580 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-25 08:49:09,581 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-25 08:49:09,581 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-25 08:49:09,581 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-25 08:49:09,581 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-25 08:49:09,582 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-25 08:49:09,582 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-25 08:49:09,582 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-25 08:49:09,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-25 08:49:09,583 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-25 08:49:09,583 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-25 08:49:09,584 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-25 08:49:09,584 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_572eab91-9a4f-41ea-96a9-98c006e27ce1/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 -> c7b71b458b3f08f188a62c7539b715f43fd7f97d [2019-11-25 08:49:09,738 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-25 08:49:09,751 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-25 08:49:09,754 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-25 08:49:09,755 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-25 08:49:09,756 INFO L275 PluginConnector]: CDTParser initialized [2019-11-25 08:49:09,756 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_572eab91-9a4f-41ea-96a9-98c006e27ce1/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_5-1.c [2019-11-25 08:49:09,815 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_572eab91-9a4f-41ea-96a9-98c006e27ce1/bin/uautomizer/data/5abf4cf0d/f3254d3b4110471b8fccd305f3030684/FLAGcd37e9da1 [2019-11-25 08:49:10,177 INFO L306 CDTParser]: Found 1 translation units. [2019-11-25 08:49:10,177 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_572eab91-9a4f-41ea-96a9-98c006e27ce1/sv-benchmarks/c/recursive-simple/fibo_5-1.c [2019-11-25 08:49:10,182 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_572eab91-9a4f-41ea-96a9-98c006e27ce1/bin/uautomizer/data/5abf4cf0d/f3254d3b4110471b8fccd305f3030684/FLAGcd37e9da1 [2019-11-25 08:49:10,602 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_572eab91-9a4f-41ea-96a9-98c006e27ce1/bin/uautomizer/data/5abf4cf0d/f3254d3b4110471b8fccd305f3030684 [2019-11-25 08:49:10,605 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-25 08:49:10,606 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-25 08:49:10,612 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-25 08:49:10,612 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-25 08:49:10,615 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-25 08:49:10,616 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:49:10" (1/1) ... [2019-11-25 08:49:10,618 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18a2a056 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:10, skipping insertion in model container [2019-11-25 08:49:10,618 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:49:10" (1/1) ... [2019-11-25 08:49:10,627 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-25 08:49:10,643 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-25 08:49:10,789 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:49:10,794 INFO L201 MainTranslator]: Completed pre-run [2019-11-25 08:49:10,897 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:49:10,911 INFO L205 MainTranslator]: Completed translation [2019-11-25 08:49:10,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:10 WrapperNode [2019-11-25 08:49:10,912 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-25 08:49:10,913 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-25 08:49:10,914 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-25 08:49:10,914 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-25 08:49:10,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:10" (1/1) ... [2019-11-25 08:49:10,926 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:10" (1/1) ... [2019-11-25 08:49:10,940 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-25 08:49:10,940 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-25 08:49:10,940 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-25 08:49:10,941 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-25 08:49:10,946 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:10" (1/1) ... [2019-11-25 08:49:10,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:10" (1/1) ... [2019-11-25 08:49:10,947 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:10" (1/1) ... [2019-11-25 08:49:10,947 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:10" (1/1) ... [2019-11-25 08:49:10,948 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:10" (1/1) ... [2019-11-25 08:49:10,950 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:10" (1/1) ... [2019-11-25 08:49:10,951 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:10" (1/1) ... [2019-11-25 08:49:10,952 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-25 08:49:10,952 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-25 08:49:10,953 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-25 08:49:10,953 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-25 08:49:10,953 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:10" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_572eab91-9a4f-41ea-96a9-98c006e27ce1/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:49:11,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-25 08:49:11,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-25 08:49:11,007 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2019-11-25 08:49:11,007 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2019-11-25 08:49:11,149 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-25 08:49:11,149 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-25 08:49:11,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:49:11 BoogieIcfgContainer [2019-11-25 08:49:11,150 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-25 08:49:11,151 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-25 08:49:11,151 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-25 08:49:11,154 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-25 08:49:11,154 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-25 08:49:11,154 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 25.11 08:49:10" (1/3) ... [2019-11-25 08:49:11,175 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@6b86d02e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 25.11 08:49:11, skipping insertion in model container [2019-11-25 08:49:11,176 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-25 08:49:11,176 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:10" (2/3) ... [2019-11-25 08:49:11,176 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@6b86d02e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 25.11 08:49:11, skipping insertion in model container [2019-11-25 08:49:11,177 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-25 08:49:11,177 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:49:11" (3/3) ... [2019-11-25 08:49:11,178 INFO L371 chiAutomizerObserver]: Analyzing ICFG fibo_5-1.c [2019-11-25 08:49:11,234 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-25 08:49:11,234 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-25 08:49:11,234 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-25 08:49:11,234 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-25 08:49:11,234 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-25 08:49:11,235 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-25 08:49:11,235 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-25 08:49:11,235 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-25 08:49:11,247 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2019-11-25 08:49:11,268 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-25 08:49:11,268 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:49:11,268 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:49:11,274 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-25 08:49:11,275 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-25 08:49:11,275 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-25 08:49:11,275 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2019-11-25 08:49:11,277 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-25 08:49:11,277 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:49:11,277 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:49:11,278 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-25 08:49:11,278 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-25 08:49:11,284 INFO L794 eck$LassoCheckResult]: Stem: 8#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 19#L25true call main_#t~ret2 := fibo(main_~x~0);< 11#fiboENTRYtrue [2019-11-25 08:49:11,285 INFO L796 eck$LassoCheckResult]: Loop: 11#fiboENTRYtrue ~n := #in~n; 7#L6true assume !(~n < 1); 10#L8true assume !(1 == ~n); 18#L11true call #t~ret0 := fibo(~n - 1);< 11#fiboENTRYtrue [2019-11-25 08:49:11,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:11,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1021, now seen corresponding path program 1 times [2019-11-25 08:49:11,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:49:11,298 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702461139] [2019-11-25 08:49:11,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:49:11,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:49:11,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:49:11,406 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:49:11,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:11,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 1 times [2019-11-25 08:49:11,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:49:11,409 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353685149] [2019-11-25 08:49:11,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:49:11,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:49:11,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:49:11,439 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:49:11,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:11,441 INFO L82 PathProgramCache]: Analyzing trace with hash 943411592, now seen corresponding path program 1 times [2019-11-25 08:49:11,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:49:11,441 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359326614] [2019-11-25 08:49:11,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:49:11,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:49:11,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:49:11,453 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:49:11,534 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:49:11,534 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:49:11,534 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:49:11,534 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:49:11,535 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-25 08:49:11,535 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:49:11,535 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:49:11,535 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:49:11,535 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration1_Loop [2019-11-25 08:49:11,535 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:49:11,536 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:49:11,551 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:49:11,556 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:49:11,564 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:49:11,567 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:49:11,570 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:49:11,651 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:49:11,652 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_572eab91-9a4f-41ea-96a9-98c006e27ce1/bin/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:49:11,657 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:49:11,657 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:49:11,664 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:49:11,664 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_572eab91-9a4f-41ea-96a9-98c006e27ce1/bin/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:49:11,670 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:49:11,671 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:49:11,675 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:49:11,675 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_572eab91-9a4f-41ea-96a9-98c006e27ce1/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:49:11,684 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:49:11,687 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:49:11,691 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:49:11,691 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_572eab91-9a4f-41ea-96a9-98c006e27ce1/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) [2019-11-25 08:49:11,705 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:49:11,705 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:49:11,709 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:49:11,710 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_572eab91-9a4f-41ea-96a9-98c006e27ce1/bin/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:49:11,720 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:49:11,720 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_572eab91-9a4f-41ea-96a9-98c006e27ce1/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) [2019-11-25 08:49:11,741 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-25 08:49:11,741 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:49:11,749 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-25 08:49:11,751 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:49:11,752 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:49:11,752 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:49:11,752 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:49:11,752 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-25 08:49:11,752 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:49:11,752 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:49:11,752 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:49:11,753 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration1_Loop [2019-11-25 08:49:11,753 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:49:11,753 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:49:11,754 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:49:11,761 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:49:11,764 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:49:11,771 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:49:11,777 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:49:11,845 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:49:11,849 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_572eab91-9a4f-41ea-96a9-98c006e27ce1/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:49:11,859 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:49:11,865 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:49:11,865 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:49:11,866 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:49:11,866 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:49:11,866 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:49:11,868 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:49:11,868 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-25 08:49:11,870 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_572eab91-9a4f-41ea-96a9-98c006e27ce1/bin/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:49:11,880 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:49:11,881 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:49:11,882 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:49:11,882 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:49:11,882 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:49:11,882 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:49:11,883 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:49:11,883 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-25 08:49:11,885 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_572eab91-9a4f-41ea-96a9-98c006e27ce1/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 [2019-11-25 08:49:11,901 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-25 08:49:11,903 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:49:11,904 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:49:11,904 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:49:11,904 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:49:11,904 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:49:11,905 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:49:11,905 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-25 08:49:11,908 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_572eab91-9a4f-41ea-96a9-98c006e27ce1/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 [2019-11-25 08:49:11,916 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-25 08:49:11,917 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:49:11,918 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:49:11,918 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:49:11,918 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:49:11,918 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:49:11,919 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:49:11,919 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-25 08:49:11,920 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_572eab91-9a4f-41ea-96a9-98c006e27ce1/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 [2019-11-25 08:49:11,925 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-25 08:49:11,927 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:49:11,927 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:49:11,927 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:49:11,927 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:49:11,927 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:49:11,928 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:49:11,928 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-25 08:49:11,931 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-25 08:49:11,935 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-25 08:49:11,935 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_572eab91-9a4f-41ea-96a9-98c006e27ce1/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:49:11,948 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-25 08:49:11,948 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-25 08:49:11,948 INFO L510 LassoAnalysis]: Proved termination. [2019-11-25 08:49:11,949 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2019-11-25 08:49:11,953 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-25 08:49:11,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:12,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:12,004 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-25 08:49:12,006 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:49:12,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:12,024 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:49:12,025 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:49:12,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:49:12,064 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2019-11-25 08:49:12,065 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states. Second operand 4 states. [2019-11-25 08:49:12,193 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states.. Second operand 4 states. Result 47 states and 59 transitions. Complement of second has 12 states. [2019-11-25 08:49:12,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-25 08:49:12,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-25 08:49:12,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2019-11-25 08:49:12,200 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 4 letters. [2019-11-25 08:49:12,202 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:49:12,202 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 6 letters. Loop has 4 letters. [2019-11-25 08:49:12,202 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:49:12,202 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 8 letters. [2019-11-25 08:49:12,203 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:49:12,203 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 47 states and 59 transitions. [2019-11-25 08:49:12,208 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-25 08:49:12,214 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 47 states to 24 states and 33 transitions. [2019-11-25 08:49:12,215 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2019-11-25 08:49:12,215 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2019-11-25 08:49:12,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 33 transitions. [2019-11-25 08:49:12,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-25 08:49:12,218 INFO L688 BuchiCegarLoop]: Abstraction has 24 states and 33 transitions. [2019-11-25 08:49:12,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 33 transitions. [2019-11-25 08:49:12,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2019-11-25 08:49:12,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-25 08:49:12,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2019-11-25 08:49:12,246 INFO L711 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-11-25 08:49:12,246 INFO L591 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-11-25 08:49:12,246 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-25 08:49:12,246 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 25 transitions. [2019-11-25 08:49:12,247 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-25 08:49:12,247 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:49:12,247 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:49:12,248 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:49:12,248 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:49:12,249 INFO L794 eck$LassoCheckResult]: Stem: 120#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 121#L25 call main_#t~ret2 := fibo(main_~x~0);< 125#fiboENTRY ~n := #in~n; 126#L6 assume !(~n < 1); 124#L8 assume !(1 == ~n); 118#L11 call #t~ret0 := fibo(~n - 1);< 127#fiboENTRY ~n := #in~n; 128#L6 assume ~n < 1;#res := 0; 123#fiboFINAL assume true; 117#fiboEXIT >#32#return; 119#L11-1 [2019-11-25 08:49:12,249 INFO L796 eck$LassoCheckResult]: Loop: 119#L11-1 call #t~ret1 := fibo(~n - 2);< 132#fiboENTRY ~n := #in~n; 135#L6 assume !(~n < 1); 134#L8 assume !(1 == ~n); 130#L11 call #t~ret0 := fibo(~n - 1);< 132#fiboENTRY ~n := #in~n; 135#L6 assume ~n < 1;#res := 0; 131#fiboFINAL assume true; 133#fiboEXIT >#32#return; 119#L11-1 [2019-11-25 08:49:12,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:12,249 INFO L82 PathProgramCache]: Analyzing trace with hash 531553871, now seen corresponding path program 1 times [2019-11-25 08:49:12,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:49:12,249 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008113701] [2019-11-25 08:49:12,250 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:49:12,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:12,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:12,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:49:12,340 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008113701] [2019-11-25 08:49:12,340 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923083641] [2019-11-25 08:49:12,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_572eab91-9a4f-41ea-96a9-98c006e27ce1/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:49:12,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:12,388 INFO L255 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-25 08:49:12,389 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:49:12,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:49:12,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:49:12,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-25 08:49:12,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835530719] [2019-11-25 08:49:12,414 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-25 08:49:12,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:12,415 INFO L82 PathProgramCache]: Analyzing trace with hash -606345326, now seen corresponding path program 1 times [2019-11-25 08:49:12,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:49:12,415 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536705204] [2019-11-25 08:49:12,415 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:49:12,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:12,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:12,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-25 08:49:12,467 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536705204] [2019-11-25 08:49:12,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:49:12,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-25 08:49:12,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843826161] [2019-11-25 08:49:12,468 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-25 08:49:12,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:49:12,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-25 08:49:12,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-25 08:49:12,472 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. cyclomatic complexity: 8 Second operand 6 states. [2019-11-25 08:49:12,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:49:12,565 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2019-11-25 08:49:12,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-25 08:49:12,566 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 31 transitions. [2019-11-25 08:49:12,567 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-25 08:49:12,569 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 23 states and 29 transitions. [2019-11-25 08:49:12,569 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2019-11-25 08:49:12,569 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2019-11-25 08:49:12,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 29 transitions. [2019-11-25 08:49:12,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-25 08:49:12,570 INFO L688 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-25 08:49:12,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 29 transitions. [2019-11-25 08:49:12,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-25 08:49:12,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-25 08:49:12,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2019-11-25 08:49:12,574 INFO L711 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-25 08:49:12,574 INFO L591 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-25 08:49:12,574 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-25 08:49:12,574 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 29 transitions. [2019-11-25 08:49:12,577 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-25 08:49:12,577 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:49:12,577 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:49:12,578 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:49:12,578 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-11-25 08:49:12,578 INFO L794 eck$LassoCheckResult]: Stem: 220#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 221#L25 call main_#t~ret2 := fibo(main_~x~0);< 225#fiboENTRY ~n := #in~n; 226#L6 assume !(~n < 1); 224#L8 assume !(1 == ~n); 218#L11 call #t~ret0 := fibo(~n - 1);< 227#fiboENTRY ~n := #in~n; 228#L6 assume !(~n < 1); 222#L8 assume 1 == ~n;#res := 1; 223#fiboFINAL assume true; 217#fiboEXIT >#32#return; 219#L11-1 [2019-11-25 08:49:12,578 INFO L796 eck$LassoCheckResult]: Loop: 219#L11-1 call #t~ret1 := fibo(~n - 2);< 232#fiboENTRY ~n := #in~n; 239#L6 assume !(~n < 1); 238#L8 assume !(1 == ~n); 230#L11 call #t~ret0 := fibo(~n - 1);< 232#fiboENTRY ~n := #in~n; 239#L6 assume !(~n < 1); 238#L8 assume 1 == ~n;#res := 1; 236#fiboFINAL assume true; 234#fiboEXIT >#32#return; 219#L11-1 [2019-11-25 08:49:12,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:12,579 INFO L82 PathProgramCache]: Analyzing trace with hash -701674289, now seen corresponding path program 1 times [2019-11-25 08:49:12,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:49:12,579 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33780441] [2019-11-25 08:49:12,580 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:49:12,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:12,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:12,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:49:12,679 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33780441] [2019-11-25 08:49:12,679 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346245867] [2019-11-25 08:49:12,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_572eab91-9a4f-41ea-96a9-98c006e27ce1/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:49:12,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:12,717 INFO L255 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-25 08:49:12,718 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:49:12,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:49:12,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:49:12,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-25 08:49:12,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24986690] [2019-11-25 08:49:12,732 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-25 08:49:12,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:12,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1616811028, now seen corresponding path program 1 times [2019-11-25 08:49:12,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:49:12,733 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302288104] [2019-11-25 08:49:12,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:49:12,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:49:12,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:49:12,743 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:49:12,870 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:49:12,870 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:49:12,871 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:49:12,871 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:49:12,871 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-25 08:49:12,871 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:49:12,871 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:49:12,871 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:49:12,871 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration3_Loop [2019-11-25 08:49:12,871 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:49:12,872 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:49:12,873 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:49:12,884 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:49:12,888 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:49:12,890 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:49:12,946 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:49:12,946 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_572eab91-9a4f-41ea-96a9-98c006e27ce1/bin/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:49:12,951 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:49:12,951 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_572eab91-9a4f-41ea-96a9-98c006e27ce1/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:49:12,975 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-25 08:49:12,975 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:49:13,450 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-25 08:49:13,453 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:49:13,453 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:49:13,454 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:49:13,454 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:49:13,454 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-25 08:49:13,454 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:49:13,454 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:49:13,454 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:49:13,455 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration3_Loop [2019-11-25 08:49:13,455 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:49:13,455 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:49:13,456 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:49:13,461 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:49:13,472 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:49:13,475 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:49:13,514 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:49:13,514 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_572eab91-9a4f-41ea-96a9-98c006e27ce1/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:49:13,524 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:49:13,527 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:49:13,527 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:49:13,528 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:49:13,528 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:49:13,528 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:49:13,529 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:49:13,529 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-25 08:49:13,531 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_572eab91-9a4f-41ea-96a9-98c006e27ce1/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) [2019-11-25 08:49:13,545 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-25 08:49:13,547 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:49:13,547 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:49:13,547 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:49:13,547 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:49:13,547 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:49:13,550 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:49:13,550 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:49:13,553 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-25 08:49:13,560 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-25 08:49:13,560 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_572eab91-9a4f-41ea-96a9-98c006e27ce1/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) [2019-11-25 08:49:13,564 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-25 08:49:13,564 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-25 08:49:13,565 INFO L510 LassoAnalysis]: Proved termination. [2019-11-25 08:49:13,565 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-11-25 08:49:13,567 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:49:13,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:13,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:13,610 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-25 08:49:13,613 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:49:13,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:13,675 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-25 08:49:13,677 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:49:13,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:49:13,750 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2019-11-25 08:49:13,750 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8 Second operand 7 states. [2019-11-25 08:49:13,959 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8. Second operand 7 states. Result 134 states and 182 transitions. Complement of second has 28 states. [2019-11-25 08:49:13,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2019-11-25 08:49:13,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-25 08:49:13,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 34 transitions. [2019-11-25 08:49:13,961 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 10 letters. [2019-11-25 08:49:13,962 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:49:13,962 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 21 letters. Loop has 10 letters. [2019-11-25 08:49:13,963 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:49:13,963 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 20 letters. [2019-11-25 08:49:13,964 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:49:13,964 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 134 states and 182 transitions. [2019-11-25 08:49:13,972 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-25 08:49:13,978 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 134 states to 107 states and 151 transitions. [2019-11-25 08:49:13,978 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 63 [2019-11-25 08:49:13,979 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2019-11-25 08:49:13,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 151 transitions. [2019-11-25 08:49:13,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-25 08:49:13,979 INFO L688 BuchiCegarLoop]: Abstraction has 107 states and 151 transitions. [2019-11-25 08:49:13,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states and 151 transitions. [2019-11-25 08:49:13,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2019-11-25 08:49:13,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-25 08:49:13,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2019-11-25 08:49:13,996 INFO L711 BuchiCegarLoop]: Abstraction has 93 states and 125 transitions. [2019-11-25 08:49:13,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:49:13,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-25 08:49:13,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:49:13,997 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand 8 states. [2019-11-25 08:49:14,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:49:14,082 INFO L93 Difference]: Finished difference Result 108 states and 146 transitions. [2019-11-25 08:49:14,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-25 08:49:14,083 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 108 states and 146 transitions. [2019-11-25 08:49:14,088 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-25 08:49:14,092 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 108 states to 105 states and 143 transitions. [2019-11-25 08:49:14,092 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 68 [2019-11-25 08:49:14,092 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2019-11-25 08:49:14,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 143 transitions. [2019-11-25 08:49:14,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-25 08:49:14,093 INFO L688 BuchiCegarLoop]: Abstraction has 105 states and 143 transitions. [2019-11-25 08:49:14,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states and 143 transitions. [2019-11-25 08:49:14,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2019-11-25 08:49:14,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-25 08:49:14,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 124 transitions. [2019-11-25 08:49:14,106 INFO L711 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2019-11-25 08:49:14,106 INFO L591 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2019-11-25 08:49:14,106 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-25 08:49:14,106 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 93 states and 124 transitions. [2019-11-25 08:49:14,108 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-25 08:49:14,108 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:49:14,109 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:49:14,110 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:49:14,111 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2019-11-25 08:49:14,111 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 [2019-11-25 08:49:14,111 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 [2019-11-25 08:49:14,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:14,112 INFO L82 PathProgramCache]: Analyzing trace with hash -240562386, now seen corresponding path program 1 times [2019-11-25 08:49:14,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:49:14,112 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699162613] [2019-11-25 08:49:14,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:49:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:14,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:14,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:14,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:14,263 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-25 08:49:14,263 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699162613] [2019-11-25 08:49:14,264 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455959008] [2019-11-25 08:49:14,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_572eab91-9a4f-41ea-96a9-98c006e27ce1/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:49:14,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:14,289 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-25 08:49:14,290 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:49:14,313 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-25 08:49:14,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:49:14,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-25 08:49:14,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210022006] [2019-11-25 08:49:14,315 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-25 08:49:14,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:14,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1408722332, now seen corresponding path program 1 times [2019-11-25 08:49:14,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:49:14,315 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564868819] [2019-11-25 08:49:14,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:49:14,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:14,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:14,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:14,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:14,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:14,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:14,443 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 26 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-25 08:49:14,443 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564868819] [2019-11-25 08:49:14,444 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401577578] [2019-11-25 08:49:14,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_572eab91-9a4f-41ea-96a9-98c006e27ce1/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:49:14,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:14,482 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-25 08:49:14,484 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:49:14,507 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-25 08:49:14,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:49:14,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-11-25 08:49:14,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619431630] [2019-11-25 08:49:14,509 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-25 08:49:14,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:49:14,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-25 08:49:14,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-11-25 08:49:14,509 INFO L87 Difference]: Start difference. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 12 states. [2019-11-25 08:49:14,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:49:14,728 INFO L93 Difference]: Finished difference Result 115 states and 158 transitions. [2019-11-25 08:49:14,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-25 08:49:14,728 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 115 states and 158 transitions. [2019-11-25 08:49:14,732 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2019-11-25 08:49:14,735 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 115 states to 113 states and 156 transitions. [2019-11-25 08:49:14,735 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 76 [2019-11-25 08:49:14,736 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 76 [2019-11-25 08:49:14,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 113 states and 156 transitions. [2019-11-25 08:49:14,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-25 08:49:14,736 INFO L688 BuchiCegarLoop]: Abstraction has 113 states and 156 transitions. [2019-11-25 08:49:14,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states and 156 transitions. [2019-11-25 08:49:14,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2019-11-25 08:49:14,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-25 08:49:14,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 156 transitions. [2019-11-25 08:49:14,752 INFO L711 BuchiCegarLoop]: Abstraction has 113 states and 156 transitions. [2019-11-25 08:49:14,752 INFO L591 BuchiCegarLoop]: Abstraction has 113 states and 156 transitions. [2019-11-25 08:49:14,752 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-11-25 08:49:14,752 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 113 states and 156 transitions. [2019-11-25 08:49:14,756 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2019-11-25 08:49:14,756 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:49:14,757 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:49:14,758 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:49:14,758 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2019-11-25 08:49:14,759 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 [2019-11-25 08:49:14,759 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 [2019-11-25 08:49:14,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:14,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1087292419, now seen corresponding path program 2 times [2019-11-25 08:49:14,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:49:14,760 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692907726] [2019-11-25 08:49:14,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:49:14,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:49:14,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:49:14,795 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:49:14,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:14,799 INFO L82 PathProgramCache]: Analyzing trace with hash 22774646, now seen corresponding path program 2 times [2019-11-25 08:49:14,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:49:14,799 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736983068] [2019-11-25 08:49:14,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:49:14,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:49:14,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:49:14,821 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:49:14,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:14,821 INFO L82 PathProgramCache]: Analyzing trace with hash 560101880, now seen corresponding path program 3 times [2019-11-25 08:49:14,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:49:14,822 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028408192] [2019-11-25 08:49:14,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:49:14,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:14,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:14,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:14,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:14,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:14,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:14,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:14,992 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 52 proven. 67 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-25 08:49:14,992 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028408192] [2019-11-25 08:49:14,992 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498177110] [2019-11-25 08:49:14,992 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_572eab91-9a4f-41ea-96a9-98c006e27ce1/bin/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:49:15,038 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-25 08:49:15,039 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:49:15,040 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-25 08:49:15,044 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:49:15,092 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 63 proven. 69 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-25 08:49:15,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:49:15,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2019-11-25 08:49:15,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265336619] [2019-11-25 08:49:15,341 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:49:15,341 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:49:15,342 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:49:15,342 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:49:15,342 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-25 08:49:15,342 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:49:15,342 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:49:15,342 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:49:15,342 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration5_Loop [2019-11-25 08:49:15,342 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:49:15,342 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:49:15,343 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:49:15,345 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:49:15,347 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:49:15,349 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:49:15,411 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:49:15,411 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_572eab91-9a4f-41ea-96a9-98c006e27ce1/bin/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:49:15,416 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:49:15,416 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:49:15,418 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:49:15,419 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_572eab91-9a4f-41ea-96a9-98c006e27ce1/bin/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:49:15,423 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:49:15,423 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:49:15,425 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:49:15,425 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_572eab91-9a4f-41ea-96a9-98c006e27ce1/bin/uautomizer/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:49:15,429 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:49:15,429 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:49:15,432 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:49:15,432 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_572eab91-9a4f-41ea-96a9-98c006e27ce1/bin/uautomizer/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:49:15,439 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:49:15,439 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_572eab91-9a4f-41ea-96a9-98c006e27ce1/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) [2019-11-25 08:49:15,456 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-25 08:49:15,456 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:49:15,969 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-25 08:49:15,971 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:49:15,971 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:49:15,971 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:49:15,971 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:49:15,971 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-25 08:49:15,971 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:49:15,971 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:49:15,972 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:49:15,972 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration5_Loop [2019-11-25 08:49:15,972 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:49:15,972 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:49:15,972 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:49:15,975 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:49:15,977 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:49:15,985 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:49:16,044 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:49:16,044 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_572eab91-9a4f-41ea-96a9-98c006e27ce1/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) [2019-11-25 08:49:16,059 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-25 08:49:16,060 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:49:16,061 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:49:16,061 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:49:16,061 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:49:16,061 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:49:16,062 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:49:16,062 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:49:16,065 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_572eab91-9a4f-41ea-96a9-98c006e27ce1/bin/uautomizer/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:49:16,068 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-25 08:49:16,069 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:49:16,070 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:49:16,070 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:49:16,070 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:49:16,070 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:49:16,070 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:49:16,070 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-25 08:49:16,071 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_572eab91-9a4f-41ea-96a9-98c006e27ce1/bin/uautomizer/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:49:16,075 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-25 08:49:16,077 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:49:16,077 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:49:16,077 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:49:16,077 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:49:16,077 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:49:16,079 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:49:16,079 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-25 08:49:16,083 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-25 08:49:16,084 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-25 08:49:16,084 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_572eab91-9a4f-41ea-96a9-98c006e27ce1/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 [2019-11-25 08:49:16,089 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-25 08:49:16,089 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-25 08:49:16,089 INFO L510 LassoAnalysis]: Proved termination. [2019-11-25 08:49:16,089 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-11-25 08:49:16,091 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-25 08:49:16,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:16,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:16,148 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-25 08:49:16,151 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:49:16,176 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:49:16,180 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:49:16,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:16,208 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-25 08:49:16,210 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:49:16,265 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-25 08:49:16,266 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2019-11-25 08:49:16,266 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 156 transitions. cyclomatic complexity: 49 Second operand 8 states. [2019-11-25 08:49:16,451 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 156 transitions. cyclomatic complexity: 49. Second operand 8 states. Result 182 states and 248 transitions. Complement of second has 33 states. [2019-11-25 08:49:16,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2019-11-25 08:49:16,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-25 08:49:16,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 36 transitions. [2019-11-25 08:49:16,452 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 36 transitions. Stem has 31 letters. Loop has 22 letters. [2019-11-25 08:49:16,452 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:49:16,453 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-25 08:49:16,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:16,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:16,496 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-25 08:49:16,498 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:49:16,529 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:49:16,531 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:49:16,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:16,560 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-25 08:49:16,562 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:49:16,626 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-25 08:49:16,626 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 6 loop predicates [2019-11-25 08:49:16,626 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 156 transitions. cyclomatic complexity: 49 Second operand 8 states. [2019-11-25 08:49:16,819 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 156 transitions. cyclomatic complexity: 49. Second operand 8 states. Result 307 states and 417 transitions. Complement of second has 25 states. [2019-11-25 08:49:16,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2019-11-25 08:49:16,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-25 08:49:16,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 23 transitions. [2019-11-25 08:49:16,824 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 23 transitions. Stem has 31 letters. Loop has 22 letters. [2019-11-25 08:49:16,824 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:49:16,825 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-25 08:49:16,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:16,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:16,872 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-25 08:49:16,878 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:49:16,907 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:49:16,909 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:49:16,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:16,939 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-25 08:49:16,940 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:49:16,996 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-25 08:49:16,996 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2019-11-25 08:49:16,997 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 156 transitions. cyclomatic complexity: 49 Second operand 8 states. [2019-11-25 08:49:17,225 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 156 transitions. cyclomatic complexity: 49. Second operand 8 states. Result 1077 states and 1514 transitions. Complement of second has 130 states. [2019-11-25 08:49:17,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2019-11-25 08:49:17,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-25 08:49:17,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 41 transitions. [2019-11-25 08:49:17,226 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 31 letters. Loop has 22 letters. [2019-11-25 08:49:17,227 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:49:17,227 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 53 letters. Loop has 22 letters. [2019-11-25 08:49:17,229 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:49:17,229 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 31 letters. Loop has 44 letters. [2019-11-25 08:49:17,231 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:49:17,231 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1077 states and 1514 transitions. [2019-11-25 08:49:17,249 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 58 [2019-11-25 08:49:17,265 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1077 states to 604 states and 937 transitions. [2019-11-25 08:49:17,265 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 242 [2019-11-25 08:49:17,267 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 271 [2019-11-25 08:49:17,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 604 states and 937 transitions. [2019-11-25 08:49:17,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-25 08:49:17,268 INFO L688 BuchiCegarLoop]: Abstraction has 604 states and 937 transitions. [2019-11-25 08:49:17,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states and 937 transitions. [2019-11-25 08:49:17,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 475. [2019-11-25 08:49:17,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 475 states. [2019-11-25 08:49:17,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 723 transitions. [2019-11-25 08:49:17,308 INFO L711 BuchiCegarLoop]: Abstraction has 475 states and 723 transitions. [2019-11-25 08:49:17,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:49:17,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-25 08:49:17,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2019-11-25 08:49:17,309 INFO L87 Difference]: Start difference. First operand 475 states and 723 transitions. Second operand 16 states. [2019-11-25 08:49:17,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:49:17,624 INFO L93 Difference]: Finished difference Result 150 states and 188 transitions. [2019-11-25 08:49:17,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-25 08:49:17,625 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 150 states and 188 transitions. [2019-11-25 08:49:17,628 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-11-25 08:49:17,630 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 150 states to 150 states and 188 transitions. [2019-11-25 08:49:17,630 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 80 [2019-11-25 08:49:17,630 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 105 [2019-11-25 08:49:17,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 150 states and 188 transitions. [2019-11-25 08:49:17,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-25 08:49:17,630 INFO L688 BuchiCegarLoop]: Abstraction has 150 states and 188 transitions. [2019-11-25 08:49:17,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states and 188 transitions. [2019-11-25 08:49:17,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 121. [2019-11-25 08:49:17,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-11-25 08:49:17,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 142 transitions. [2019-11-25 08:49:17,636 INFO L711 BuchiCegarLoop]: Abstraction has 121 states and 142 transitions. [2019-11-25 08:49:17,636 INFO L591 BuchiCegarLoop]: Abstraction has 121 states and 142 transitions. [2019-11-25 08:49:17,636 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-11-25 08:49:17,637 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 121 states and 142 transitions. [2019-11-25 08:49:17,638 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-11-25 08:49:17,638 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:49:17,638 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:49:17,639 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [9, 7, 6, 6, 5, 3, 3, 2, 2, 2, 1, 1, 1] [2019-11-25 08:49:17,639 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-25 08:49:17,640 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 [2019-11-25 08:49:17,640 INFO L796 eck$LassoCheckResult]: Loop: 4547#fiboENTRY ~n := #in~n; 4636#L6 assume !(~n < 1); 4631#L8 assume !(1 == ~n); 4519#L11 call #t~ret0 := fibo(~n - 1);< 4547#fiboENTRY [2019-11-25 08:49:17,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:17,640 INFO L82 PathProgramCache]: Analyzing trace with hash -918730881, now seen corresponding path program 4 times [2019-11-25 08:49:17,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:49:17,641 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253224551] [2019-11-25 08:49:17,641 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:49:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:17,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:17,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:17,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:17,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:17,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:17,781 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 73 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-11-25 08:49:17,782 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253224551] [2019-11-25 08:49:17,782 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354201652] [2019-11-25 08:49:17,782 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_572eab91-9a4f-41ea-96a9-98c006e27ce1/bin/uautomizer/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:49:17,818 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-25 08:49:17,819 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:49:17,819 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-25 08:49:17,821 INFO L278 TraceCheckSpWp]: Computing forward predicates... [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Exception during sending of exit command (exit): Broken pipe [2019-11-25 08:49:17,926 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 65 proven. 42 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-25 08:49:17,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:49:17,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2019-11-25 08:49:17,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857106865] [2019-11-25 08:49:17,928 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-25 08:49:17,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:17,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 2 times [2019-11-25 08:49:17,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:49:17,928 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036977437] [2019-11-25 08:49:17,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:49:17,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:49:17,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:49:17,932 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:49:17,970 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:49:17,970 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:49:17,970 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:49:17,971 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:49:17,971 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-25 08:49:17,971 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:49:17,971 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:49:17,971 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:49:17,971 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration6_Loop [2019-11-25 08:49:17,971 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:49:17,971 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:49:17,972 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:49:17,974 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:49:17,976 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:49:17,978 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:49:17,990 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:49:18,036 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:49:18,036 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_572eab91-9a4f-41ea-96a9-98c006e27ce1/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 [2019-11-25 08:49:18,040 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:49:18,040 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:49:18,042 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:49:18,042 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_572eab91-9a4f-41ea-96a9-98c006e27ce1/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) [2019-11-25 08:49:18,047 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:49:18,047 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:49:18,050 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:49:18,050 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_572eab91-9a4f-41ea-96a9-98c006e27ce1/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 [2019-11-25 08:49:18,054 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:49:18,054 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:49:18,056 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:49:18,056 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_572eab91-9a4f-41ea-96a9-98c006e27ce1/bin/uautomizer/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:49:18,060 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:49:18,060 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_572eab91-9a4f-41ea-96a9-98c006e27ce1/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) [2019-11-25 08:49:18,068 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-25 08:49:18,068 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:49:18,110 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-25 08:49:18,111 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:49:18,111 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:49:18,111 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:49:18,111 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:49:18,111 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-25 08:49:18,112 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:49:18,112 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:49:18,112 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:49:18,112 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration6_Loop [2019-11-25 08:49:18,112 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:49:18,112 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:49:18,112 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:49:18,114 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:49:18,115 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:49:18,117 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:49:18,122 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:49:18,158 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:49:18,158 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_572eab91-9a4f-41ea-96a9-98c006e27ce1/bin/uautomizer/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:49:18,163 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-25 08:49:18,165 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:49:18,165 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:49:18,165 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:49:18,165 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:49:18,166 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:49:18,166 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:49:18,166 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-25 08:49:18,171 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_572eab91-9a4f-41ea-96a9-98c006e27ce1/bin/uautomizer/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:49:18,184 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-25 08:49:18,186 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:49:18,186 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:49:18,186 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:49:18,186 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:49:18,186 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:49:18,187 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:49:18,187 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:49:18,189 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_572eab91-9a4f-41ea-96a9-98c006e27ce1/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) [2019-11-25 08:49:18,194 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-25 08:49:18,195 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:49:18,195 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:49:18,196 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:49:18,196 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:49:18,196 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:49:18,196 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:49:18,196 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:49:18,198 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_572eab91-9a4f-41ea-96a9-98c006e27ce1/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) [2019-11-25 08:49:18,204 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-25 08:49:18,205 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:49:18,205 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:49:18,205 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:49:18,206 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:49:18,206 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:49:18,206 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:49:18,206 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-25 08:49:18,208 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-25 08:49:18,216 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-25 08:49:18,216 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_572eab91-9a4f-41ea-96a9-98c006e27ce1/bin/uautomizer/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:49:18,220 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-25 08:49:18,220 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-25 08:49:18,220 INFO L510 LassoAnalysis]: Proved termination. [2019-11-25 08:49:18,220 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2019-11-25 08:49:18,221 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-25 08:49:18,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:18,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:18,280 INFO L255 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-25 08:49:18,281 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:49:18,296 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:49:18,298 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:49:18,299 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:49:18,301 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:49:18,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:18,312 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:49:18,312 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:49:18,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:49:18,326 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2019-11-25 08:49:18,326 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 121 states and 142 transitions. cyclomatic complexity: 24 Second operand 5 states. [2019-11-25 08:49:18,392 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 121 states and 142 transitions. cyclomatic complexity: 24. Second operand 5 states. Result 131 states and 152 transitions. Complement of second has 13 states. [2019-11-25 08:49:18,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-25 08:49:18,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-25 08:49:18,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2019-11-25 08:49:18,397 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 48 letters. Loop has 4 letters. [2019-11-25 08:49:18,397 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:49:18,397 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-25 08:49:18,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:18,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:18,463 INFO L255 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-25 08:49:18,466 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:49:18,489 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:49:18,491 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:49:18,494 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:49:18,499 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:49:18,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:18,516 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:49:18,516 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:49:18,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:49:18,538 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2019-11-25 08:49:18,538 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 121 states and 142 transitions. cyclomatic complexity: 24 Second operand 5 states. [2019-11-25 08:49:18,617 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 121 states and 142 transitions. cyclomatic complexity: 24. Second operand 5 states. Result 131 states and 152 transitions. Complement of second has 13 states. [2019-11-25 08:49:18,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-25 08:49:18,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-25 08:49:18,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2019-11-25 08:49:18,618 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 48 letters. Loop has 4 letters. [2019-11-25 08:49:18,618 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:49:18,618 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-25 08:49:18,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:18,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:18,679 INFO L255 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-25 08:49:18,680 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:49:18,696 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:49:18,697 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:49:18,699 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:49:18,700 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:49:18,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:18,715 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:49:18,715 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:49:18,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:49:18,730 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2019-11-25 08:49:18,730 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 121 states and 142 transitions. cyclomatic complexity: 24 Second operand 5 states. [2019-11-25 08:49:18,805 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 121 states and 142 transitions. cyclomatic complexity: 24. Second operand 5 states. Result 170 states and 193 transitions. Complement of second has 14 states. [2019-11-25 08:49:18,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-25 08:49:18,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-25 08:49:18,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 20 transitions. [2019-11-25 08:49:18,806 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 48 letters. Loop has 4 letters. [2019-11-25 08:49:18,806 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:49:18,807 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 52 letters. Loop has 4 letters. [2019-11-25 08:49:18,807 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:49:18,807 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 48 letters. Loop has 8 letters. [2019-11-25 08:49:18,808 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:49:18,808 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 170 states and 193 transitions. [2019-11-25 08:49:18,810 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-25 08:49:18,810 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 170 states to 0 states and 0 transitions. [2019-11-25 08:49:18,810 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-25 08:49:18,810 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-25 08:49:18,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-25 08:49:18,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-25 08:49:18,811 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-25 08:49:18,811 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-25 08:49:18,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:49:18,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-25 08:49:18,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2019-11-25 08:49:18,811 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 19 states. [2019-11-25 08:49:18,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:49:18,811 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2019-11-25 08:49:18,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-25 08:49:18,812 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2019-11-25 08:49:18,812 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-25 08:49:18,812 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2019-11-25 08:49:18,812 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-25 08:49:18,812 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-25 08:49:18,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-25 08:49:18,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-25 08:49:18,812 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-25 08:49:18,813 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-25 08:49:18,813 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-25 08:49:18,813 INFO L424 BuchiCegarLoop]: ======== Iteration 7============ [2019-11-25 08:49:18,813 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-11-25 08:49:18,813 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-25 08:49:18,813 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-11-25 08:49:18,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 25.11 08:49:18 BoogieIcfgContainer [2019-11-25 08:49:18,819 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-25 08:49:18,820 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-25 08:49:18,820 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-25 08:49:18,820 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-25 08:49:18,821 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:49:11" (3/4) ... [2019-11-25 08:49:18,831 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-25 08:49:18,831 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-25 08:49:18,835 INFO L168 Benchmark]: Toolchain (without parser) took 8225.87 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 168.3 MB). Free memory was 951.4 MB in the beginning and 987.1 MB in the end (delta: -35.7 MB). Peak memory consumption was 132.6 MB. Max. memory is 11.5 GB. [2019-11-25 08:49:18,839 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:49:18,840 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.75 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 121.6 MB). Free memory was 951.4 MB in the beginning and 1.1 GB in the end (delta: -166.4 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-11-25 08:49:18,840 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.75 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:49:18,840 INFO L168 Benchmark]: Boogie Preprocessor took 11.83 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:49:18,841 INFO L168 Benchmark]: RCFGBuilder took 197.89 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2019-11-25 08:49:18,842 INFO L168 Benchmark]: BuchiAutomizer took 7668.80 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 46.7 MB). Free memory was 1.1 GB in the beginning and 987.1 MB in the end (delta: 111.0 MB). Peak memory consumption was 157.6 MB. Max. memory is 11.5 GB. [2019-11-25 08:49:18,842 INFO L168 Benchmark]: Witness Printer took 11.01 ms. Allocated memory is still 1.2 GB. Free memory is still 987.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:49:18,844 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 300.75 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 121.6 MB). Free memory was 951.4 MB in the beginning and 1.1 GB in the end (delta: -166.4 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 26.75 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.83 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 197.89 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 7668.80 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 46.7 MB). Free memory was 1.1 GB in the beginning and 987.1 MB in the end (delta: 111.0 MB). Peak memory consumption was 157.6 MB. Max. memory is 11.5 GB. * Witness Printer took 11.01 ms. Allocated memory is still 1.2 GB. Free memory is still 987.1 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 7.5s and 7 iterations. TraceHistogramMax:9. Analysis of lassos took 4.2s. Construction of modules took 0.7s. Büchi inclusion checks took 2.3s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 7. Automata minimization 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 189 StatesRemovedByMinimization, 5 NontrivialMinimizations. Non-live state removal took 0.0s 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, 0.7s 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: 20ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 10 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.2s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...