./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 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_44059028-467b-4cec-8ae3-4116008207b2/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_44059028-467b-4cec-8ae3-4116008207b2/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_44059028-467b-4cec-8ae3-4116008207b2/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_44059028-467b-4cec-8ae3-4116008207b2/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_5-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_44059028-467b-4cec-8ae3-4116008207b2/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_44059028-467b-4cec-8ae3-4116008207b2/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 0.1.24-678e011 [2019-11-20 01:21:11,443 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 01:21:11,445 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 01:21:11,460 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 01:21:11,461 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 01:21:11,462 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 01:21:11,464 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 01:21:11,473 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 01:21:11,478 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 01:21:11,483 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 01:21:11,484 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 01:21:11,486 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 01:21:11,486 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 01:21:11,488 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 01:21:11,489 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 01:21:11,490 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 01:21:11,491 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 01:21:11,492 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 01:21:11,495 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 01:21:11,499 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 01:21:11,503 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 01:21:11,505 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 01:21:11,508 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 01:21:11,509 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 01:21:11,512 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 01:21:11,513 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 01:21:11,513 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 01:21:11,514 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 01:21:11,515 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 01:21:11,516 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 01:21:11,516 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 01:21:11,517 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 01:21:11,517 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 01:21:11,519 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 01:21:11,520 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 01:21:11,521 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 01:21:11,521 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 01:21:11,521 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 01:21:11,522 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 01:21:11,522 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 01:21:11,524 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 01:21:11,524 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_44059028-467b-4cec-8ae3-4116008207b2/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2019-11-20 01:21:11,555 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 01:21:11,555 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 01:21:11,556 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 01:21:11,556 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 01:21:11,556 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 01:21:11,557 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-20 01:21:11,557 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-20 01:21:11,557 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-20 01:21:11,557 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-20 01:21:11,557 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-20 01:21:11,558 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-20 01:21:11,558 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 01:21:11,558 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 01:21:11,558 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 01:21:11,558 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 01:21:11,559 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 01:21:11,559 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 01:21:11,559 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-20 01:21:11,559 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-20 01:21:11,559 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-20 01:21:11,560 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 01:21:11,560 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 01:21:11,560 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-20 01:21:11,560 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 01:21:11,560 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-20 01:21:11,561 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 01:21:11,561 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 01:21:11,561 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-20 01:21:11,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 01:21:11,561 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 01:21:11,562 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-20 01:21:11,562 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-20 01:21:11,563 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_44059028-467b-4cec-8ae3-4116008207b2/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 [2019-11-20 01:21:11,758 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 01:21:11,769 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 01:21:11,773 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 01:21:11,774 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 01:21:11,775 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 01:21:11,775 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_44059028-467b-4cec-8ae3-4116008207b2/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_5-1.c [2019-11-20 01:21:11,835 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_44059028-467b-4cec-8ae3-4116008207b2/bin/uautomizer/data/977d7ee37/3a04af1d2da84644b1fe99ca4b8d8a21/FLAG68d3f7e01 [2019-11-20 01:21:12,245 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 01:21:12,245 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_44059028-467b-4cec-8ae3-4116008207b2/sv-benchmarks/c/recursive-simple/fibo_5-1.c [2019-11-20 01:21:12,251 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_44059028-467b-4cec-8ae3-4116008207b2/bin/uautomizer/data/977d7ee37/3a04af1d2da84644b1fe99ca4b8d8a21/FLAG68d3f7e01 [2019-11-20 01:21:12,683 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_44059028-467b-4cec-8ae3-4116008207b2/bin/uautomizer/data/977d7ee37/3a04af1d2da84644b1fe99ca4b8d8a21 [2019-11-20 01:21:12,686 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 01:21:12,687 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 01:21:12,688 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 01:21:12,688 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 01:21:12,691 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 01:21:12,692 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 01:21:12" (1/1) ... [2019-11-20 01:21:12,695 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ec5683c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:21:12, skipping insertion in model container [2019-11-20 01:21:12,695 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 01:21:12" (1/1) ... [2019-11-20 01:21:12,702 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 01:21:12,717 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 01:21:12,843 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 01:21:12,847 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 01:21:12,927 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 01:21:12,940 INFO L192 MainTranslator]: Completed translation [2019-11-20 01:21:12,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:21:12 WrapperNode [2019-11-20 01:21:12,941 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 01:21:12,942 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 01:21:12,942 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 01:21:12,942 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 01:21:12,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:21:12" (1/1) ... [2019-11-20 01:21:12,952 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:21:12" (1/1) ... [2019-11-20 01:21:12,966 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 01:21:12,966 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 01:21:12,966 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 01:21:12,966 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 01:21:12,972 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:21:12" (1/1) ... [2019-11-20 01:21:12,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:21:12" (1/1) ... [2019-11-20 01:21:12,973 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:21:12" (1/1) ... [2019-11-20 01:21:12,973 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:21:12" (1/1) ... [2019-11-20 01:21:12,975 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:21:12" (1/1) ... [2019-11-20 01:21:12,977 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:21:12" (1/1) ... [2019-11-20 01:21:12,978 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:21:12" (1/1) ... [2019-11-20 01:21:12,979 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 01:21:12,979 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 01:21:12,979 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 01:21:12,979 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 01:21:12,980 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:21:12" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_44059028-467b-4cec-8ae3-4116008207b2/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 01:21:13,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 01:21:13,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 01:21:13,039 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2019-11-20 01:21:13,039 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2019-11-20 01:21:13,181 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 01:21:13,181 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-20 01:21:13,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 01:21:13 BoogieIcfgContainer [2019-11-20 01:21:13,182 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 01:21:13,183 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-20 01:21:13,183 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-20 01:21:13,186 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-20 01:21:13,187 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-20 01:21:13,187 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 20.11 01:21:12" (1/3) ... [2019-11-20 01:21:13,188 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@6143c9e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.11 01:21:13, skipping insertion in model container [2019-11-20 01:21:13,188 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-20 01:21:13,188 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:21:12" (2/3) ... [2019-11-20 01:21:13,189 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@6143c9e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.11 01:21:13, skipping insertion in model container [2019-11-20 01:21:13,189 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-20 01:21:13,189 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 01:21:13" (3/3) ... [2019-11-20 01:21:13,190 INFO L371 chiAutomizerObserver]: Analyzing ICFG fibo_5-1.c [2019-11-20 01:21:13,265 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-20 01:21:13,265 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-20 01:21:13,265 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-20 01:21:13,265 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 01:21:13,265 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 01:21:13,266 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-20 01:21:13,266 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 01:21:13,266 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-20 01:21:13,291 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2019-11-20 01:21:13,338 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-20 01:21:13,338 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 01:21:13,339 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 01:21:13,358 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-20 01:21:13,359 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-20 01:21:13,359 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-20 01:21:13,359 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2019-11-20 01:21:13,365 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-20 01:21:13,366 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 01:21:13,366 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 01:21:13,366 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-20 01:21:13,366 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-20 01:21:13,372 INFO L794 eck$LassoCheckResult]: Stem: 8#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 19#L25true call main_#t~ret2 := fibo(main_~x~0);< 11#fiboENTRYtrue [2019-11-20 01:21:13,372 INFO L796 eck$LassoCheckResult]: Loop: 11#fiboENTRYtrue ~n := #in~n; 7#L6true assume !(~n < 1); 10#L8true assume !(1 == ~n); 18#L11true call #t~ret0 := fibo(~n - 1);< 11#fiboENTRYtrue [2019-11-20 01:21:13,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:21:13,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1021, now seen corresponding path program 1 times [2019-11-20 01:21:13,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 01:21:13,384 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685225990] [2019-11-20 01:21:13,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 01:21:13,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 01:21:13,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 01:21:13,473 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 01:21:13,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:21:13,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 1 times [2019-11-20 01:21:13,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 01:21:13,474 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695754157] [2019-11-20 01:21:13,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 01:21:13,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 01:21:13,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 01:21:13,486 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 01:21:13,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:21:13,488 INFO L82 PathProgramCache]: Analyzing trace with hash 943411592, now seen corresponding path program 1 times [2019-11-20 01:21:13,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 01:21:13,489 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80942279] [2019-11-20 01:21:13,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 01:21:13,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 01:21:13,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 01:21:13,502 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 01:21:13,597 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 01:21:13,598 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 01:21:13,598 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 01:21:13,598 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 01:21:13,598 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 01:21:13,599 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 01:21:13,599 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 01:21:13,599 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 01:21:13,599 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration1_Loop [2019-11-20 01:21:13,599 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 01:21:13,599 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 01:21:13,614 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 01:21:13,619 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 01:21:13,626 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 01:21:13,628 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 01:21:13,631 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 01:21:13,714 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 01:21:13,717 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_44059028-467b-4cec-8ae3-4116008207b2/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) [2019-11-20 01:21:13,726 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 01:21:13,727 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 01:21:13,736 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 01:21:13,736 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Exception during sending of exit command (exit): Broken pipe No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_44059028-467b-4cec-8ae3-4116008207b2/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) [2019-11-20 01:21:13,760 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 01:21:13,761 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 01:21:13,766 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 01:21:13,767 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_44059028-467b-4cec-8ae3-4116008207b2/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) [2019-11-20 01:21:13,783 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 01:21:13,784 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 01:21:13,788 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 01:21:13,789 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_44059028-467b-4cec-8ae3-4116008207b2/bin/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 01:21:13,804 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 01:21:13,804 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 01:21:13,808 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 01:21:13,808 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_44059028-467b-4cec-8ae3-4116008207b2/bin/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 01:21:13,816 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 01:21:13,816 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_44059028-467b-4cec-8ae3-4116008207b2/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) [2019-11-20 01:21:13,828 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 01:21:13,829 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 [2019-11-20 01:21:13,840 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 01:21:13,842 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 01:21:13,842 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 01:21:13,842 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 01:21:13,843 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 01:21:13,843 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 01:21:13,843 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 01:21:13,843 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 01:21:13,843 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 01:21:13,843 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration1_Loop [2019-11-20 01:21:13,843 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 01:21:13,844 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 01:21:13,845 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 01:21:13,857 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 01:21:13,862 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 01:21:13,867 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 01:21:13,870 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 01:21:13,929 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 01:21:13,934 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_44059028-467b-4cec-8ae3-4116008207b2/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 01:21:13,948 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 01:21:13,950 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 01:21:13,951 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 01:21:13,951 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 01:21:13,951 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 01:21:13,951 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 01:21:13,954 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 01:21:13,954 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 01:21:13,957 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_44059028-467b-4cec-8ae3-4116008207b2/bin/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 01:21:13,964 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 01:21:13,966 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 01:21:13,966 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 01:21:13,966 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 01:21:13,966 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 01:21:13,967 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 01:21:13,967 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 01:21:13,967 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 01:21:13,969 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_44059028-467b-4cec-8ae3-4116008207b2/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 [2019-11-20 01:21:13,974 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 01:21:13,976 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 01:21:13,976 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 01:21:13,976 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 01:21:13,976 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 01:21:13,976 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 01:21:13,977 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 01:21:13,977 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 01:21:13,979 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_44059028-467b-4cec-8ae3-4116008207b2/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 [2019-11-20 01:21:13,990 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 01:21:13,991 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 01:21:13,991 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 01:21:13,991 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 01:21:13,991 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 01:21:13,991 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 01:21:13,992 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 01:21:13,992 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 01:21:13,994 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_44059028-467b-4cec-8ae3-4116008207b2/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 01:21:14,005 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 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 01:21:14,007 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 01:21:14,007 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 01:21:14,007 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 01:21:14,008 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 01:21:14,008 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 01:21:14,009 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 01:21:14,009 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 01:21:14,012 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 01:21:14,017 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-20 01:21:14,017 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_44059028-467b-4cec-8ae3-4116008207b2/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) [2019-11-20 01:21:14,027 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 01:21:14,027 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 01:21:14,027 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 01:21:14,028 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 01:21:14,036 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-20 01:21:14,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:21:14,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:14,103 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 01:21:14,105 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:21:14,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:14,129 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 01:21:14,130 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:21:14,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 01:21:14,178 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2019-11-20 01:21:14,179 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states. Second operand 4 states. [2019-11-20 01:21:14,312 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states.. Second operand 4 states. Result 47 states and 59 transitions. Complement of second has 12 states. [2019-11-20 01:21:14,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-20 01:21:14,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-20 01:21:14,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2019-11-20 01:21:14,319 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 4 letters. [2019-11-20 01:21:14,321 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 01:21:14,321 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 6 letters. Loop has 4 letters. [2019-11-20 01:21:14,321 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 01:21:14,321 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 8 letters. [2019-11-20 01:21:14,322 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 01:21:14,323 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 47 states and 59 transitions. [2019-11-20 01:21:14,337 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-20 01:21:14,348 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 47 states to 24 states and 33 transitions. [2019-11-20 01:21:14,349 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2019-11-20 01:21:14,351 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2019-11-20 01:21:14,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 33 transitions. [2019-11-20 01:21:14,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 01:21:14,354 INFO L688 BuchiCegarLoop]: Abstraction has 24 states and 33 transitions. [2019-11-20 01:21:14,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 33 transitions. [2019-11-20 01:21:14,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2019-11-20 01:21:14,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-20 01:21:14,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2019-11-20 01:21:14,390 INFO L711 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-11-20 01:21:14,390 INFO L591 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-11-20 01:21:14,390 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-20 01:21:14,391 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 25 transitions. [2019-11-20 01:21:14,396 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-20 01:21:14,397 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 01:21:14,397 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 01:21:14,399 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 01:21:14,399 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 01:21:14,399 INFO L794 eck$LassoCheckResult]: Stem: 120#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 121#L25 call main_#t~ret2 := fibo(main_~x~0);< 125#fiboENTRY ~n := #in~n; 126#L6 assume !(~n < 1); 124#L8 assume !(1 == ~n); 118#L11 call #t~ret0 := fibo(~n - 1);< 127#fiboENTRY ~n := #in~n; 128#L6 assume ~n < 1;#res := 0; 123#fiboFINAL assume true; 117#fiboEXIT >#32#return; 119#L11-1 [2019-11-20 01:21:14,399 INFO L796 eck$LassoCheckResult]: Loop: 119#L11-1 call #t~ret1 := fibo(~n - 2);< 132#fiboENTRY ~n := #in~n; 135#L6 assume !(~n < 1); 134#L8 assume !(1 == ~n); 130#L11 call #t~ret0 := fibo(~n - 1);< 132#fiboENTRY ~n := #in~n; 135#L6 assume ~n < 1;#res := 0; 131#fiboFINAL assume true; 133#fiboEXIT >#32#return; 119#L11-1 [2019-11-20 01:21:14,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:21:14,400 INFO L82 PathProgramCache]: Analyzing trace with hash 531553871, now seen corresponding path program 1 times [2019-11-20 01:21:14,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 01:21:14,400 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669982387] [2019-11-20 01:21:14,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 01:21:14,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:14,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:14,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 01:21:14,516 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669982387] [2019-11-20 01:21:14,518 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524049112] [2019-11-20 01:21:14,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_44059028-467b-4cec-8ae3-4116008207b2/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 01:21:14,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:14,553 INFO L255 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 01:21:14,554 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:21:14,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 01:21:14,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 01:21:14,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-20 01:21:14,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662697751] [2019-11-20 01:21:14,581 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-20 01:21:14,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:21:14,581 INFO L82 PathProgramCache]: Analyzing trace with hash -606345326, now seen corresponding path program 1 times [2019-11-20 01:21:14,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 01:21:14,581 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233807501] [2019-11-20 01:21:14,582 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 01:21:14,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:14,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 01:21:14,646 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233807501] [2019-11-20 01:21:14,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 01:21:14,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-20 01:21:14,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898025370] [2019-11-20 01:21:14,647 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-20 01:21:14,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 01:21:14,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 01:21:14,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-20 01:21:14,651 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. cyclomatic complexity: 8 Second operand 6 states. [2019-11-20 01:21:14,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:21:14,744 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2019-11-20 01:21:14,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 01:21:14,745 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 31 transitions. [2019-11-20 01:21:14,746 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-20 01:21:14,748 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 23 states and 29 transitions. [2019-11-20 01:21:14,748 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2019-11-20 01:21:14,748 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2019-11-20 01:21:14,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 29 transitions. [2019-11-20 01:21:14,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 01:21:14,749 INFO L688 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-20 01:21:14,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 29 transitions. [2019-11-20 01:21:14,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-20 01:21:14,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-20 01:21:14,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2019-11-20 01:21:14,754 INFO L711 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-20 01:21:14,755 INFO L591 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-20 01:21:14,755 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-20 01:21:14,755 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 29 transitions. [2019-11-20 01:21:14,757 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-20 01:21:14,758 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 01:21:14,758 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 01:21:14,759 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 01:21:14,759 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-11-20 01:21:14,759 INFO L794 eck$LassoCheckResult]: Stem: 220#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 221#L25 call main_#t~ret2 := fibo(main_~x~0);< 225#fiboENTRY ~n := #in~n; 226#L6 assume !(~n < 1); 224#L8 assume !(1 == ~n); 218#L11 call #t~ret0 := fibo(~n - 1);< 227#fiboENTRY ~n := #in~n; 228#L6 assume !(~n < 1); 222#L8 assume 1 == ~n;#res := 1; 223#fiboFINAL assume true; 217#fiboEXIT >#32#return; 219#L11-1 [2019-11-20 01:21:14,760 INFO L796 eck$LassoCheckResult]: Loop: 219#L11-1 call #t~ret1 := fibo(~n - 2);< 232#fiboENTRY ~n := #in~n; 239#L6 assume !(~n < 1); 238#L8 assume !(1 == ~n); 230#L11 call #t~ret0 := fibo(~n - 1);< 232#fiboENTRY ~n := #in~n; 239#L6 assume !(~n < 1); 238#L8 assume 1 == ~n;#res := 1; 236#fiboFINAL assume true; 234#fiboEXIT >#32#return; 219#L11-1 [2019-11-20 01:21:14,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:21:14,760 INFO L82 PathProgramCache]: Analyzing trace with hash -701674289, now seen corresponding path program 1 times [2019-11-20 01:21:14,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 01:21:14,760 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512611104] [2019-11-20 01:21:14,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 01:21:14,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:14,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:14,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 01:21:14,840 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512611104] [2019-11-20 01:21:14,840 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396636125] [2019-11-20 01:21:14,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_44059028-467b-4cec-8ae3-4116008207b2/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 01:21:14,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:14,884 INFO L255 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 01:21:14,886 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:21:14,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 01:21:14,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 01:21:14,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-20 01:21:14,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526080907] [2019-11-20 01:21:14,903 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-20 01:21:14,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:21:14,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1616811028, now seen corresponding path program 1 times [2019-11-20 01:21:14,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 01:21:14,904 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424153618] [2019-11-20 01:21:14,905 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 01:21:14,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 01:21:14,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 01:21:14,919 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 01:21:15,057 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 01:21:15,058 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 01:21:15,058 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 01:21:15,058 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 01:21:15,058 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 01:21:15,058 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 01:21:15,058 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 01:21:15,059 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 01:21:15,059 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration3_Loop [2019-11-20 01:21:15,059 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 01:21:15,059 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 01:21:15,060 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 01:21:15,073 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 01:21:15,077 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 01:21:15,080 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 01:21:15,131 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 01:21:15,131 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_44059028-467b-4cec-8ae3-4116008207b2/bin/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 01:21:15,145 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 01:21:15,145 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_44059028-467b-4cec-8ae3-4116008207b2/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 01:21:15,166 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 01:21:15,167 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 01:21:15,631 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 01:21:15,635 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 01:21:15,635 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 01:21:15,635 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 01:21:15,635 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 01:21:15,636 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 01:21:15,636 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 01:21:15,636 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 01:21:15,636 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 01:21:15,636 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration3_Loop [2019-11-20 01:21:15,636 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 01:21:15,636 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 01:21:15,638 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 01:21:15,645 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 01:21:15,658 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 01:21:15,660 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 01:21:15,713 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 01:21:15,713 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_44059028-467b-4cec-8ae3-4116008207b2/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 01:21:15,728 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 01:21:15,731 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 01:21:15,732 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 01:21:15,732 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 01:21:15,732 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 01:21:15,732 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 01:21:15,733 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 01:21:15,734 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 01:21:15,737 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_44059028-467b-4cec-8ae3-4116008207b2/bin/uautomizer/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 01:21:15,748 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 01:21:15,750 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 01:21:15,750 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 01:21:15,750 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 01:21:15,750 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 01:21:15,751 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 01:21:15,753 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 01:21:15,753 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 01:21:15,756 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 01:21:15,765 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-20 01:21:15,765 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_44059028-467b-4cec-8ae3-4116008207b2/bin/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 01:21:15,777 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 01:21:15,780 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 01:21:15,781 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 01:21:15,781 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-11-20 01:21:15,783 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-20 01:21:15,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:21:15,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:15,829 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 01:21:15,832 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:21:15,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:15,896 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-20 01:21:15,898 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:21:15,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 01:21:15,980 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2019-11-20 01:21:15,980 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8 Second operand 7 states. [2019-11-20 01:21:16,207 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8. Second operand 7 states. Result 134 states and 182 transitions. Complement of second has 28 states. [2019-11-20 01:21:16,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2019-11-20 01:21:16,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-20 01:21:16,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 34 transitions. [2019-11-20 01:21:16,213 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 10 letters. [2019-11-20 01:21:16,213 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 01:21:16,214 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 21 letters. Loop has 10 letters. [2019-11-20 01:21:16,214 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 01:21:16,214 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 20 letters. [2019-11-20 01:21:16,215 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 01:21:16,215 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 134 states and 182 transitions. [2019-11-20 01:21:16,224 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-20 01:21:16,230 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 134 states to 107 states and 151 transitions. [2019-11-20 01:21:16,230 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 63 [2019-11-20 01:21:16,231 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2019-11-20 01:21:16,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 151 transitions. [2019-11-20 01:21:16,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 01:21:16,231 INFO L688 BuchiCegarLoop]: Abstraction has 107 states and 151 transitions. [2019-11-20 01:21:16,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states and 151 transitions. [2019-11-20 01:21:16,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2019-11-20 01:21:16,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-20 01:21:16,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2019-11-20 01:21:16,264 INFO L711 BuchiCegarLoop]: Abstraction has 93 states and 125 transitions. [2019-11-20 01:21:16,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 01:21:16,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 01:21:16,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-20 01:21:16,265 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand 8 states. [2019-11-20 01:21:16,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:21:16,378 INFO L93 Difference]: Finished difference Result 108 states and 146 transitions. [2019-11-20 01:21:16,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 01:21:16,378 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 108 states and 146 transitions. [2019-11-20 01:21:16,383 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-20 01:21:16,388 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 108 states to 105 states and 143 transitions. [2019-11-20 01:21:16,388 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 68 [2019-11-20 01:21:16,389 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2019-11-20 01:21:16,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 143 transitions. [2019-11-20 01:21:16,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 01:21:16,389 INFO L688 BuchiCegarLoop]: Abstraction has 105 states and 143 transitions. [2019-11-20 01:21:16,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states and 143 transitions. [2019-11-20 01:21:16,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2019-11-20 01:21:16,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-20 01:21:16,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 124 transitions. [2019-11-20 01:21:16,412 INFO L711 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2019-11-20 01:21:16,412 INFO L591 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2019-11-20 01:21:16,412 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-20 01:21:16,413 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 93 states and 124 transitions. [2019-11-20 01:21:16,417 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-20 01:21:16,418 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 01:21:16,418 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 01:21:16,422 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 01:21:16,422 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2019-11-20 01:21:16,423 INFO L794 eck$LassoCheckResult]: Stem: 744#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 745#L25 call main_#t~ret2 := fibo(main_~x~0);< 769#fiboENTRY ~n := #in~n; 793#L6 assume !(~n < 1); 752#L8 assume !(1 == ~n); 753#L11 call #t~ret0 := fibo(~n - 1);< 759#fiboENTRY ~n := #in~n; 761#L6 assume !(~n < 1); 772#L8 assume !(1 == ~n); 760#L11 call #t~ret0 := fibo(~n - 1);< 759#fiboENTRY ~n := #in~n; 761#L6 assume !(~n < 1); 772#L8 assume !(1 == ~n); 760#L11 call #t~ret0 := fibo(~n - 1);< 759#fiboENTRY ~n := #in~n; 762#L6 assume !(~n < 1); 796#L8 assume 1 == ~n;#res := 1; 795#fiboFINAL assume true; 794#fiboEXIT >#32#return; 757#L11-1 call #t~ret1 := fibo(~n - 2);< 756#fiboENTRY ~n := #in~n; 758#L6 assume ~n < 1;#res := 0; 823#fiboFINAL assume true; 817#fiboEXIT >#34#return; 814#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 812#fiboFINAL assume true; 802#fiboEXIT >#32#return; 804#L11-1 [2019-11-20 01:21:16,423 INFO L796 eck$LassoCheckResult]: Loop: 804#L11-1 call #t~ret1 := fibo(~n - 2);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume !(1 == ~n); 808#L11 call #t~ret0 := fibo(~n - 1);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume !(1 == ~n); 808#L11 call #t~ret0 := fibo(~n - 1);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume 1 == ~n;#res := 1; 816#fiboFINAL assume true; 813#fiboEXIT >#32#return; 804#L11-1 call #t~ret1 := fibo(~n - 2);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume !(1 == ~n); 808#L11 call #t~ret0 := fibo(~n - 1);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume 1 == ~n;#res := 1; 816#fiboFINAL assume true; 813#fiboEXIT >#32#return; 804#L11-1 call #t~ret1 := fibo(~n - 2);< 810#fiboENTRY ~n := #in~n; 818#L6 assume ~n < 1;#res := 0; 819#fiboFINAL assume true; 821#fiboEXIT >#34#return; 809#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 811#fiboFINAL assume true; 807#fiboEXIT >#34#return; 809#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 811#fiboFINAL assume true; 807#fiboEXIT >#32#return; 804#L11-1 [2019-11-20 01:21:16,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:21:16,424 INFO L82 PathProgramCache]: Analyzing trace with hash -240562386, now seen corresponding path program 1 times [2019-11-20 01:21:16,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 01:21:16,425 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910259112] [2019-11-20 01:21:16,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 01:21:16,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:16,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:16,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:16,594 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-20 01:21:16,594 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910259112] [2019-11-20 01:21:16,594 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117340465] [2019-11-20 01:21:16,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_44059028-467b-4cec-8ae3-4116008207b2/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 01:21:16,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:16,622 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 01:21:16,624 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:21:16,653 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-20 01:21:16,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 01:21:16,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-20 01:21:16,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575802250] [2019-11-20 01:21:16,654 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-20 01:21:16,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:21:16,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1408722332, now seen corresponding path program 1 times [2019-11-20 01:21:16,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 01:21:16,655 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139717482] [2019-11-20 01:21:16,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 01:21:16,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:16,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:16,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:16,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:16,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:16,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:16,798 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 26 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-20 01:21:16,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139717482] [2019-11-20 01:21:16,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901446116] [2019-11-20 01:21:16,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_44059028-467b-4cec-8ae3-4116008207b2/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 01:21:16,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:16,834 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 01:21:16,837 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:21:16,869 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-20 01:21:16,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 01:21:16,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-11-20 01:21:16,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197486324] [2019-11-20 01:21:16,870 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-20 01:21:16,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 01:21:16,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 01:21:16,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-11-20 01:21:16,871 INFO L87 Difference]: Start difference. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 12 states. [2019-11-20 01:21:17,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:21:17,095 INFO L93 Difference]: Finished difference Result 115 states and 158 transitions. [2019-11-20 01:21:17,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 01:21:17,096 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 115 states and 158 transitions. [2019-11-20 01:21:17,099 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2019-11-20 01:21:17,102 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 115 states to 113 states and 156 transitions. [2019-11-20 01:21:17,103 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 76 [2019-11-20 01:21:17,103 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 76 [2019-11-20 01:21:17,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 113 states and 156 transitions. [2019-11-20 01:21:17,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 01:21:17,104 INFO L688 BuchiCegarLoop]: Abstraction has 113 states and 156 transitions. [2019-11-20 01:21:17,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states and 156 transitions. [2019-11-20 01:21:17,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2019-11-20 01:21:17,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-20 01:21:17,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 156 transitions. [2019-11-20 01:21:17,114 INFO L711 BuchiCegarLoop]: Abstraction has 113 states and 156 transitions. [2019-11-20 01:21:17,114 INFO L591 BuchiCegarLoop]: Abstraction has 113 states and 156 transitions. [2019-11-20 01:21:17,114 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-11-20 01:21:17,114 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 113 states and 156 transitions. [2019-11-20 01:21:17,116 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2019-11-20 01:21:17,117 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 01:21:17,117 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 01:21:17,118 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 01:21:17,118 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2019-11-20 01:21:17,119 INFO L794 eck$LassoCheckResult]: Stem: 1248#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 1249#L25 call main_#t~ret2 := fibo(main_~x~0);< 1278#fiboENTRY ~n := #in~n; 1308#L6 assume !(~n < 1); 1307#L8 assume !(1 == ~n); 1256#L11 call #t~ret0 := fibo(~n - 1);< 1273#fiboENTRY ~n := #in~n; 1274#L6 assume !(~n < 1); 1255#L8 assume !(1 == ~n); 1257#L11 call #t~ret0 := fibo(~n - 1);< 1301#fiboENTRY ~n := #in~n; 1305#L6 assume !(~n < 1); 1303#L8 assume !(1 == ~n); 1263#L11 call #t~ret0 := fibo(~n - 1);< 1301#fiboENTRY ~n := #in~n; 1305#L6 assume !(~n < 1); 1303#L8 assume !(1 == ~n); 1263#L11 call #t~ret0 := fibo(~n - 1);< 1301#fiboENTRY ~n := #in~n; 1306#L6 assume !(~n < 1); 1304#L8 assume 1 == ~n;#res := 1; 1302#fiboFINAL assume true; 1300#fiboEXIT >#32#return; 1243#L11-1 call #t~ret1 := fibo(~n - 2);< 1298#fiboENTRY ~n := #in~n; 1345#L6 assume ~n < 1;#res := 0; 1344#fiboFINAL assume true; 1342#fiboEXIT >#34#return; 1340#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 1339#fiboFINAL assume true; 1332#fiboEXIT >#32#return; 1260#L11-1 [2019-11-20 01:21:17,119 INFO L796 eck$LassoCheckResult]: Loop: 1260#L11-1 call #t~ret1 := fibo(~n - 2);< 1276#fiboENTRY ~n := #in~n; 1309#L6 assume !(~n < 1); 1311#L8 assume !(1 == ~n); 1262#L11 call #t~ret0 := fibo(~n - 1);< 1276#fiboENTRY ~n := #in~n; 1309#L6 assume !(~n < 1); 1311#L8 assume !(1 == ~n); 1262#L11 call #t~ret0 := fibo(~n - 1);< 1276#fiboENTRY ~n := #in~n; 1309#L6 assume !(~n < 1); 1311#L8 assume 1 == ~n;#res := 1; 1254#fiboFINAL assume true; 1346#fiboEXIT >#32#return; 1252#L11-1 call #t~ret1 := fibo(~n - 2);< 1271#fiboENTRY ~n := #in~n; 1272#L6 assume ~n < 1;#res := 0; 1310#fiboFINAL assume true; 1347#fiboEXIT >#34#return; 1244#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 1258#fiboFINAL assume true; 1264#fiboEXIT >#32#return; 1260#L11-1 [2019-11-20 01:21:17,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:21:17,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1087292419, now seen corresponding path program 2 times [2019-11-20 01:21:17,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 01:21:17,120 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969204807] [2019-11-20 01:21:17,120 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 01:21:17,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 01:21:17,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 01:21:17,145 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 01:21:17,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:21:17,148 INFO L82 PathProgramCache]: Analyzing trace with hash 22774646, now seen corresponding path program 2 times [2019-11-20 01:21:17,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 01:21:17,149 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462287376] [2019-11-20 01:21:17,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 01:21:17,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 01:21:17,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 01:21:17,174 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 01:21:17,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:21:17,174 INFO L82 PathProgramCache]: Analyzing trace with hash 560101880, now seen corresponding path program 3 times [2019-11-20 01:21:17,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 01:21:17,175 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818394593] [2019-11-20 01:21:17,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 01:21:17,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:17,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:17,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:17,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:17,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:17,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:17,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:17,329 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 52 proven. 67 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-20 01:21:17,331 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818394593] [2019-11-20 01:21:17,332 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026558805] [2019-11-20 01:21:17,332 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_44059028-467b-4cec-8ae3-4116008207b2/bin/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 01:21:17,382 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-20 01:21:17,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 01:21:17,383 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-20 01:21:17,388 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:21:17,439 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 63 proven. 69 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-20 01:21:17,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 01:21:17,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2019-11-20 01:21:17,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902897860] [2019-11-20 01:21:17,680 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 01:21:17,680 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 01:21:17,680 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 01:21:17,680 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 01:21:17,680 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 01:21:17,681 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 01:21:17,681 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 01:21:17,681 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 01:21:17,681 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration5_Loop [2019-11-20 01:21:17,681 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 01:21:17,681 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 01:21:17,682 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 01:21:17,691 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 01:21:17,693 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 01:21:17,705 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 01:21:17,771 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 01:21:17,771 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_44059028-467b-4cec-8ae3-4116008207b2/bin/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 01:21:17,777 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 01:21:17,777 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 01:21:17,780 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 01:21:17,781 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_44059028-467b-4cec-8ae3-4116008207b2/bin/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 01:21:17,786 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 01:21:17,786 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 01:21:17,789 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 01:21:17,789 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_44059028-467b-4cec-8ae3-4116008207b2/bin/uautomizer/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 01:21:17,795 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 01:21:17,795 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 01:21:17,798 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 01:21:17,798 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_44059028-467b-4cec-8ae3-4116008207b2/bin/uautomizer/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 01:21:17,803 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 01:21:17,803 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_44059028-467b-4cec-8ae3-4116008207b2/bin/uautomizer/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 01:21:17,812 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 01:21:17,812 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 01:21:18,390 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 01:21:18,392 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 01:21:18,392 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 01:21:18,392 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 01:21:18,392 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 01:21:18,392 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 01:21:18,392 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 01:21:18,392 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 01:21:18,392 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 01:21:18,392 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration5_Loop [2019-11-20 01:21:18,392 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 01:21:18,393 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 01:21:18,393 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 01:21:18,403 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 01:21:18,405 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 01:21:18,421 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 01:21:18,482 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 01:21:18,482 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_44059028-467b-4cec-8ae3-4116008207b2/bin/uautomizer/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 01:21:18,489 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 01:21:18,490 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 01:21:18,490 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 01:21:18,490 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 01:21:18,491 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 01:21:18,491 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 01:21:18,491 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 01:21:18,492 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 01:21:18,493 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_44059028-467b-4cec-8ae3-4116008207b2/bin/uautomizer/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 01:21:18,497 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 01:21:18,502 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 01:21:18,502 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 01:21:18,502 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 01:21:18,502 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 01:21:18,502 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 01:21:18,503 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 01:21:18,503 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 01:21:18,504 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_44059028-467b-4cec-8ae3-4116008207b2/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) [2019-11-20 01:21:18,510 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 01:21:18,512 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 01:21:18,512 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 01:21:18,512 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 01:21:18,512 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 01:21:18,512 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 01:21:18,514 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 01:21:18,514 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 01:21:18,521 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 01:21:18,523 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-20 01:21:18,523 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_44059028-467b-4cec-8ae3-4116008207b2/bin/uautomizer/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 01:21:18,528 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 01:21:18,528 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 01:21:18,529 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 01:21:18,529 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 01:21:18,530 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-20 01:21:18,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:21:18,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:18,608 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-20 01:21:18,616 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:21:18,640 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:21:18,645 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:21:18,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:18,670 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-20 01:21:18,672 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:21:18,727 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-20 01:21:18,727 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2019-11-20 01:21:18,728 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 156 transitions. cyclomatic complexity: 49 Second operand 8 states. [2019-11-20 01:21:18,923 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 156 transitions. cyclomatic complexity: 49. Second operand 8 states. Result 182 states and 248 transitions. Complement of second has 33 states. [2019-11-20 01:21:18,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2019-11-20 01:21:18,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-20 01:21:18,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 36 transitions. [2019-11-20 01:21:18,925 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 36 transitions. Stem has 31 letters. Loop has 22 letters. [2019-11-20 01:21:18,926 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 01:21:18,926 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 01:21:18,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:21:18,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:18,978 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-20 01:21:18,980 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:21:19,007 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:21:19,010 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:21:19,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:19,040 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-20 01:21:19,042 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:21:19,122 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-20 01:21:19,123 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 6 loop predicates [2019-11-20 01:21:19,123 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 156 transitions. cyclomatic complexity: 49 Second operand 8 states. [2019-11-20 01:21:19,315 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 156 transitions. cyclomatic complexity: 49. Second operand 8 states. Result 307 states and 417 transitions. Complement of second has 25 states. [2019-11-20 01:21:19,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2019-11-20 01:21:19,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-20 01:21:19,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 23 transitions. [2019-11-20 01:21:19,317 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 23 transitions. Stem has 31 letters. Loop has 22 letters. [2019-11-20 01:21:19,318 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 01:21:19,318 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 01:21:19,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:21:19,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:19,373 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-20 01:21:19,374 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:21:19,403 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:21:19,404 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:21:19,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:19,433 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-20 01:21:19,434 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:21:19,495 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-20 01:21:19,496 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2019-11-20 01:21:19,496 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 156 transitions. cyclomatic complexity: 49 Second operand 8 states. [2019-11-20 01:21:19,751 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 156 transitions. cyclomatic complexity: 49. Second operand 8 states. Result 1077 states and 1514 transitions. Complement of second has 130 states. [2019-11-20 01:21:19,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2019-11-20 01:21:19,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-20 01:21:19,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 41 transitions. [2019-11-20 01:21:19,752 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 31 letters. Loop has 22 letters. [2019-11-20 01:21:19,753 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 01:21:19,753 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 53 letters. Loop has 22 letters. [2019-11-20 01:21:19,755 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 01:21:19,755 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 31 letters. Loop has 44 letters. [2019-11-20 01:21:19,756 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 01:21:19,757 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1077 states and 1514 transitions. [2019-11-20 01:21:19,776 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 58 [2019-11-20 01:21:19,792 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1077 states to 604 states and 937 transitions. [2019-11-20 01:21:19,792 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 242 [2019-11-20 01:21:19,794 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 271 [2019-11-20 01:21:19,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 604 states and 937 transitions. [2019-11-20 01:21:19,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 01:21:19,795 INFO L688 BuchiCegarLoop]: Abstraction has 604 states and 937 transitions. [2019-11-20 01:21:19,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states and 937 transitions. [2019-11-20 01:21:19,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 475. [2019-11-20 01:21:19,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 475 states. [2019-11-20 01:21:19,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 723 transitions. [2019-11-20 01:21:19,848 INFO L711 BuchiCegarLoop]: Abstraction has 475 states and 723 transitions. [2019-11-20 01:21:19,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 01:21:19,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-20 01:21:19,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2019-11-20 01:21:19,849 INFO L87 Difference]: Start difference. First operand 475 states and 723 transitions. Second operand 16 states. [2019-11-20 01:21:20,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:21:20,280 INFO L93 Difference]: Finished difference Result 150 states and 188 transitions. [2019-11-20 01:21:20,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-20 01:21:20,282 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 150 states and 188 transitions. [2019-11-20 01:21:20,284 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-11-20 01:21:20,288 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 150 states to 150 states and 188 transitions. [2019-11-20 01:21:20,288 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 80 [2019-11-20 01:21:20,289 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 105 [2019-11-20 01:21:20,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 150 states and 188 transitions. [2019-11-20 01:21:20,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 01:21:20,289 INFO L688 BuchiCegarLoop]: Abstraction has 150 states and 188 transitions. [2019-11-20 01:21:20,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states and 188 transitions. [2019-11-20 01:21:20,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 121. [2019-11-20 01:21:20,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-11-20 01:21:20,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 142 transitions. [2019-11-20 01:21:20,297 INFO L711 BuchiCegarLoop]: Abstraction has 121 states and 142 transitions. [2019-11-20 01:21:20,298 INFO L591 BuchiCegarLoop]: Abstraction has 121 states and 142 transitions. [2019-11-20 01:21:20,298 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-11-20 01:21:20,298 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 121 states and 142 transitions. [2019-11-20 01:21:20,299 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-11-20 01:21:20,300 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 01:21:20,300 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 01:21:20,303 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [9, 7, 6, 6, 5, 3, 3, 2, 2, 2, 1, 1, 1] [2019-11-20 01:21:20,303 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-20 01:21:20,304 INFO L794 eck$LassoCheckResult]: Stem: 4528#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 4529#L25 call main_#t~ret2 := fibo(main_~x~0);< 4551#fiboENTRY ~n := #in~n; 4549#L6 assume !(~n < 1); 4550#L8 assume !(1 == ~n); 4540#L11 call #t~ret0 := fibo(~n - 1);< 4539#fiboENTRY ~n := #in~n; 4541#L6 assume !(~n < 1); 4574#L8 assume !(1 == ~n); 4533#L11 call #t~ret0 := fibo(~n - 1);< 4548#fiboENTRY ~n := #in~n; 4572#L6 assume !(~n < 1); 4532#L8 assume !(1 == ~n); 4534#L11 call #t~ret0 := fibo(~n - 1);< 4548#fiboENTRY ~n := #in~n; 4572#L6 assume !(~n < 1); 4532#L8 assume !(1 == ~n); 4534#L11 call #t~ret0 := fibo(~n - 1);< 4548#fiboENTRY ~n := #in~n; 4573#L6 assume !(~n < 1); 4610#L8 assume 1 == ~n;#res := 1; 4609#fiboFINAL assume true; 4608#fiboEXIT >#32#return; 4605#L11-1 call #t~ret1 := fibo(~n - 2);< 4607#fiboENTRY ~n := #in~n; 4629#L6 assume ~n < 1;#res := 0; 4627#fiboFINAL assume true; 4625#fiboEXIT >#34#return; 4624#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 4623#fiboFINAL assume true; 4595#fiboEXIT >#32#return; 4576#L11-1 call #t~ret1 := fibo(~n - 2);< 4587#fiboENTRY ~n := #in~n; 4628#L6 assume ~n < 1;#res := 0; 4626#fiboFINAL assume true; 4585#fiboEXIT >#34#return; 4583#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 4581#fiboFINAL assume true; 4575#fiboEXIT >#32#return; 4562#L11-1 call #t~ret1 := fibo(~n - 2);< 4568#fiboENTRY ~n := #in~n; 4567#L6 assume !(~n < 1); 4564#L8 assume !(1 == ~n); 4566#L11 call #t~ret0 := fibo(~n - 1);< 4620#fiboENTRY ~n := #in~n; 4633#L6 assume !(~n < 1); 4634#L8 assume !(1 == ~n); 4520#L11 call #t~ret0 := fibo(~n - 1);< 4547#fiboENTRY [2019-11-20 01:21:20,304 INFO L796 eck$LassoCheckResult]: Loop: 4547#fiboENTRY ~n := #in~n; 4636#L6 assume !(~n < 1); 4631#L8 assume !(1 == ~n); 4519#L11 call #t~ret0 := fibo(~n - 1);< 4547#fiboENTRY [2019-11-20 01:21:20,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:21:20,304 INFO L82 PathProgramCache]: Analyzing trace with hash -918730881, now seen corresponding path program 4 times [2019-11-20 01:21:20,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 01:21:20,305 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375263722] [2019-11-20 01:21:20,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 01:21:20,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:20,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:20,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:20,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:20,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:20,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:20,513 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 73 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-11-20 01:21:20,513 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375263722] [2019-11-20 01:21:20,513 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645723595] [2019-11-20 01:21:20,514 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_44059028-467b-4cec-8ae3-4116008207b2/bin/uautomizer/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 01:21:20,553 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 01:21:20,554 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 01:21:20,554 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 01:21:20,556 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:21:20,727 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 65 proven. 42 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-20 01:21:20,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 01:21:20,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2019-11-20 01:21:20,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461001053] [2019-11-20 01:21:20,729 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-20 01:21:20,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:21:20,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 2 times [2019-11-20 01:21:20,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 01:21:20,730 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553233069] [2019-11-20 01:21:20,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 01:21:20,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 01:21:20,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 01:21:20,734 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 01:21:20,775 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 01:21:20,775 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 01:21:20,775 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 01:21:20,776 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 01:21:20,776 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 01:21:20,776 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 01:21:20,776 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 01:21:20,776 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 01:21:20,776 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration6_Loop [2019-11-20 01:21:20,776 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 01:21:20,776 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 01:21:20,777 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 01:21:20,779 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 01:21:20,781 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 01:21:20,783 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 01:21:20,795 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 01:21:20,851 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 01:21:20,851 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_44059028-467b-4cec-8ae3-4116008207b2/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 [2019-11-20 01:21:20,855 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 01:21:20,855 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 01:21:20,857 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 01:21:20,858 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_44059028-467b-4cec-8ae3-4116008207b2/bin/uautomizer/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 01:21:20,862 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 01:21:20,863 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 01:21:20,865 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 01:21:20,865 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_44059028-467b-4cec-8ae3-4116008207b2/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 [2019-11-20 01:21:20,870 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 01:21:20,870 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 01:21:20,877 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 01:21:20,877 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_44059028-467b-4cec-8ae3-4116008207b2/bin/uautomizer/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 01:21:20,885 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 01:21:20,885 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_44059028-467b-4cec-8ae3-4116008207b2/bin/uautomizer/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 01:21:20,894 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 01:21:20,894 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 01:21:20,941 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 01:21:20,943 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 01:21:20,943 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 01:21:20,943 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 01:21:20,943 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 01:21:20,944 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 01:21:20,944 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 01:21:20,944 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 01:21:20,944 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 01:21:20,944 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration6_Loop [2019-11-20 01:21:20,944 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 01:21:20,944 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 01:21:20,945 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 01:21:20,947 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 01:21:20,949 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 01:21:20,951 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 01:21:20,957 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 01:21:21,004 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 01:21:21,004 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_44059028-467b-4cec-8ae3-4116008207b2/bin/uautomizer/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 01:21:21,018 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 01:21:21,023 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 01:21:21,023 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 01:21:21,023 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 01:21:21,024 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 01:21:21,024 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 01:21:21,024 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 01:21:21,024 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 01:21:21,026 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_44059028-467b-4cec-8ae3-4116008207b2/bin/uautomizer/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 01:21:21,034 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 01:21:21,035 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 01:21:21,035 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 01:21:21,035 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 01:21:21,035 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 01:21:21,035 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 01:21:21,036 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 01:21:21,036 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 01:21:21,037 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_44059028-467b-4cec-8ae3-4116008207b2/bin/uautomizer/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 01:21:21,042 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 01:21:21,043 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 01:21:21,043 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 01:21:21,043 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 01:21:21,043 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 01:21:21,043 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 01:21:21,044 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 01:21:21,044 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 01:21:21,045 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_44059028-467b-4cec-8ae3-4116008207b2/bin/uautomizer/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 01:21:21,051 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 01:21:21,052 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 01:21:21,052 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 01:21:21,053 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 01:21:21,053 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 01:21:21,053 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 01:21:21,054 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 01:21:21,054 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 01:21:21,056 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 01:21:21,059 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-20 01:21:21,059 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_44059028-467b-4cec-8ae3-4116008207b2/bin/uautomizer/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 01:21:21,063 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 01:21:21,064 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 01:21:21,064 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 01:21:21,064 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2019-11-20 01:21:21,065 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-20 01:21:21,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:21:21,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:21,137 INFO L255 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-20 01:21:21,138 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:21:21,155 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:21:21,157 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:21:21,158 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:21:21,160 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:21:21,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:21,169 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 01:21:21,169 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:21:21,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 01:21:21,184 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2019-11-20 01:21:21,184 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 121 states and 142 transitions. cyclomatic complexity: 24 Second operand 5 states. [2019-11-20 01:21:21,251 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 121 states and 142 transitions. cyclomatic complexity: 24. Second operand 5 states. Result 131 states and 152 transitions. Complement of second has 13 states. [2019-11-20 01:21:21,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-20 01:21:21,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-20 01:21:21,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2019-11-20 01:21:21,252 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 48 letters. Loop has 4 letters. [2019-11-20 01:21:21,253 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 01:21:21,253 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 01:21:21,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:21:21,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:21,338 INFO L255 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-20 01:21:21,341 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:21:21,373 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:21:21,375 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:21:21,376 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:21:21,378 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:21:21,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:21,387 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 01:21:21,388 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:21:21,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 01:21:21,423 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2019-11-20 01:21:21,423 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 121 states and 142 transitions. cyclomatic complexity: 24 Second operand 5 states. [2019-11-20 01:21:21,499 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 121 states and 142 transitions. cyclomatic complexity: 24. Second operand 5 states. Result 131 states and 152 transitions. Complement of second has 13 states. [2019-11-20 01:21:21,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-20 01:21:21,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-20 01:21:21,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2019-11-20 01:21:21,500 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 48 letters. Loop has 4 letters. [2019-11-20 01:21:21,500 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 01:21:21,501 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 01:21:21,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:21:21,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:21,570 INFO L255 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-20 01:21:21,571 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:21:21,588 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:21:21,590 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:21:21,591 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:21:21,593 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:21:21,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:21,605 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 01:21:21,606 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:21:21,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 01:21:21,626 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2019-11-20 01:21:21,626 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 121 states and 142 transitions. cyclomatic complexity: 24 Second operand 5 states. [2019-11-20 01:21:21,713 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 121 states and 142 transitions. cyclomatic complexity: 24. Second operand 5 states. Result 170 states and 193 transitions. Complement of second has 14 states. [2019-11-20 01:21:21,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-20 01:21:21,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-20 01:21:21,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 20 transitions. [2019-11-20 01:21:21,719 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 48 letters. Loop has 4 letters. [2019-11-20 01:21:21,719 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 01:21:21,719 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 52 letters. Loop has 4 letters. [2019-11-20 01:21:21,720 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 01:21:21,720 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 48 letters. Loop has 8 letters. [2019-11-20 01:21:21,720 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 01:21:21,720 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 170 states and 193 transitions. [2019-11-20 01:21:21,723 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-20 01:21:21,723 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 170 states to 0 states and 0 transitions. [2019-11-20 01:21:21,723 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-20 01:21:21,723 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-20 01:21:21,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-20 01:21:21,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-20 01:21:21,724 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 01:21:21,724 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 01:21:21,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 01:21:21,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-20 01:21:21,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2019-11-20 01:21:21,725 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 19 states. [2019-11-20 01:21:21,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:21:21,725 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2019-11-20 01:21:21,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-20 01:21:21,726 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2019-11-20 01:21:21,726 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-20 01:21:21,726 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2019-11-20 01:21:21,726 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-20 01:21:21,726 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-20 01:21:21,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-20 01:21:21,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-20 01:21:21,727 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 01:21:21,727 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 01:21:21,727 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 01:21:21,727 INFO L424 BuchiCegarLoop]: ======== Iteration 7============ [2019-11-20 01:21:21,728 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-11-20 01:21:21,728 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-20 01:21:21,728 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-11-20 01:21:21,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 20.11 01:21:21 BoogieIcfgContainer [2019-11-20 01:21:21,735 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-20 01:21:21,735 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 01:21:21,736 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 01:21:21,736 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 01:21:21,736 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 01:21:13" (3/4) ... [2019-11-20 01:21:21,740 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-20 01:21:21,741 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 01:21:21,743 INFO L168 Benchmark]: Toolchain (without parser) took 9055.24 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 184.5 MB). Free memory was 944.7 MB in the beginning and 1.0 GB in the end (delta: -74.5 MB). Peak memory consumption was 110.0 MB. Max. memory is 11.5 GB. [2019-11-20 01:21:21,744 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 01:21:21,744 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.22 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.9 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -188.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-11-20 01:21:21,745 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.44 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 01:21:21,745 INFO L168 Benchmark]: Boogie Preprocessor took 12.61 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 01:21:21,746 INFO L168 Benchmark]: RCFGBuilder took 203.42 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: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. [2019-11-20 01:21:21,747 INFO L168 Benchmark]: BuchiAutomizer took 8552.26 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 1.0 GB in the end (delta: 95.7 MB). Peak memory consumption was 142.3 MB. Max. memory is 11.5 GB. [2019-11-20 01:21:21,747 INFO L168 Benchmark]: Witness Printer took 5.43 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 01:21:21,750 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 253.22 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.9 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -188.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 24.44 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 12.61 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 203.42 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: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 8552.26 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 1.0 GB in the end (delta: 95.7 MB). Peak memory consumption was 142.3 MB. Max. memory is 11.5 GB. * Witness Printer took 5.43 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 9 terminating modules (5 trivial, 2 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function n and consists of 9 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. 5 modules have a trivial ranking function, the largest among these consists of 19 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 8.4s and 7 iterations. TraceHistogramMax:9. Analysis of lassos took 4.5s. Construction of modules took 0.8s. Büchi inclusion checks took 2.6s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 7. Automata minimization 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 189 StatesRemovedByMinimization, 5 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had 121 states and ocurred in iteration 5. Nontrivial modules had stage [2, 0, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 10/26 HoareTripleCheckerStatistics: 144 SDtfs, 387 SDslu, 153 SDs, 0 SdLazy, 699 SolverSat, 227 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s 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: 22ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 10 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.3s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...