./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 f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_5-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/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 0.1.25-f470102 [2019-12-07 16:54:56,180 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 16:54:56,181 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 16:54:56,190 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 16:54:56,190 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 16:54:56,191 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 16:54:56,192 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 16:54:56,194 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 16:54:56,195 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 16:54:56,196 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 16:54:56,197 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 16:54:56,198 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 16:54:56,198 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 16:54:56,198 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 16:54:56,199 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 16:54:56,200 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 16:54:56,201 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 16:54:56,201 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 16:54:56,203 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 16:54:56,204 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 16:54:56,205 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 16:54:56,206 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 16:54:56,207 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 16:54:56,207 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 16:54:56,209 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 16:54:56,209 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 16:54:56,209 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 16:54:56,209 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 16:54:56,210 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 16:54:56,210 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 16:54:56,210 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 16:54:56,211 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 16:54:56,211 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 16:54:56,212 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 16:54:56,213 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 16:54:56,213 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 16:54:56,213 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 16:54:56,214 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 16:54:56,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 16:54:56,215 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 16:54:56,215 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 16:54:56,216 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2019-12-07 16:54:56,230 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 16:54:56,230 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 16:54:56,231 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 16:54:56,231 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 16:54:56,232 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 16:54:56,232 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-12-07 16:54:56,232 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-12-07 16:54:56,232 INFO L138 SettingsManager]: * Use old map elimination=false [2019-12-07 16:54:56,232 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-12-07 16:54:56,233 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-12-07 16:54:56,233 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-12-07 16:54:56,233 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 16:54:56,233 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 16:54:56,233 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 16:54:56,233 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 16:54:56,234 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 16:54:56,234 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 16:54:56,234 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-12-07 16:54:56,234 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-12-07 16:54:56,234 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-12-07 16:54:56,235 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 16:54:56,235 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 16:54:56,235 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-12-07 16:54:56,235 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 16:54:56,235 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-12-07 16:54:56,236 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 16:54:56,236 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 16:54:56,236 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-12-07 16:54:56,236 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 16:54:56,236 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 16:54:56,236 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 16:54:56,236 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-12-07 16:54:56,237 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-12-07 16:54:56,237 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_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/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 [2019-12-07 16:54:56,364 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 16:54:56,373 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 16:54:56,376 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 16:54:56,377 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 16:54:56,377 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 16:54:56,378 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_5-1.c [2019-12-07 16:54:56,427 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/data/3f9ec9e65/34d0c8d2d843463f8da3027d36c1ed10/FLAGe28f12ae6 [2019-12-07 16:54:56,793 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 16:54:56,793 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/sv-benchmarks/c/recursive-simple/fibo_5-1.c [2019-12-07 16:54:56,797 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/data/3f9ec9e65/34d0c8d2d843463f8da3027d36c1ed10/FLAGe28f12ae6 [2019-12-07 16:54:57,209 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/data/3f9ec9e65/34d0c8d2d843463f8da3027d36c1ed10 [2019-12-07 16:54:57,212 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 16:54:57,213 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 16:54:57,214 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 16:54:57,214 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 16:54:57,217 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 16:54:57,218 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 04:54:57" (1/1) ... [2019-12-07 16:54:57,220 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@422a306d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:54:57, skipping insertion in model container [2019-12-07 16:54:57,221 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 04:54:57" (1/1) ... [2019-12-07 16:54:57,230 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 16:54:57,244 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 16:54:57,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 16:54:57,339 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 16:54:57,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 16:54:57,388 INFO L208 MainTranslator]: Completed translation [2019-12-07 16:54:57,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:54:57 WrapperNode [2019-12-07 16:54:57,388 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 16:54:57,389 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 16:54:57,389 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 16:54:57,389 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 16:54:57,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:54:57" (1/1) ... [2019-12-07 16:54:57,398 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:54:57" (1/1) ... [2019-12-07 16:54:57,408 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 16:54:57,408 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 16:54:57,408 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 16:54:57,409 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 16:54:57,414 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:54:57" (1/1) ... [2019-12-07 16:54:57,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:54:57" (1/1) ... [2019-12-07 16:54:57,415 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:54:57" (1/1) ... [2019-12-07 16:54:57,415 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:54:57" (1/1) ... [2019-12-07 16:54:57,416 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:54:57" (1/1) ... [2019-12-07 16:54:57,418 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:54:57" (1/1) ... [2019-12-07 16:54:57,418 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:54:57" (1/1) ... [2019-12-07 16:54:57,419 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 16:54:57,419 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 16:54:57,419 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 16:54:57,419 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 16:54:57,420 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:54:57" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:54:57,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 16:54:57,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 16:54:57,459 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2019-12-07 16:54:57,459 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2019-12-07 16:54:57,544 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 16:54:57,544 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-12-07 16:54:57,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:54:57 BoogieIcfgContainer [2019-12-07 16:54:57,545 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 16:54:57,546 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-12-07 16:54:57,546 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-12-07 16:54:57,548 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-12-07 16:54:57,548 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-12-07 16:54:57,548 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 07.12 04:54:57" (1/3) ... [2019-12-07 16:54:57,549 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@235e3493 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 07.12 04:54:57, skipping insertion in model container [2019-12-07 16:54:57,549 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-12-07 16:54:57,549 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:54:57" (2/3) ... [2019-12-07 16:54:57,549 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@235e3493 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 07.12 04:54:57, skipping insertion in model container [2019-12-07 16:54:57,549 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-12-07 16:54:57,550 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:54:57" (3/3) ... [2019-12-07 16:54:57,550 INFO L371 chiAutomizerObserver]: Analyzing ICFG fibo_5-1.c [2019-12-07 16:54:57,581 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-12-07 16:54:57,581 INFO L357 BuchiCegarLoop]: Hoare is false [2019-12-07 16:54:57,581 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-12-07 16:54:57,581 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 16:54:57,581 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 16:54:57,581 INFO L361 BuchiCegarLoop]: Difference is false [2019-12-07 16:54:57,581 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 16:54:57,581 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-12-07 16:54:57,590 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2019-12-07 16:54:57,606 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-12-07 16:54:57,606 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 16:54:57,606 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 16:54:57,611 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-12-07 16:54:57,611 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-12-07 16:54:57,611 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-12-07 16:54:57,611 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2019-12-07 16:54:57,612 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-12-07 16:54:57,612 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 16:54:57,613 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 16:54:57,613 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-12-07 16:54:57,613 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-12-07 16:54:57,618 INFO L794 eck$LassoCheckResult]: Stem: 8#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 19#L25true call main_#t~ret2 := fibo(main_~x~0);< 11#fiboENTRYtrue [2019-12-07 16:54:57,618 INFO L796 eck$LassoCheckResult]: Loop: 11#fiboENTRYtrue ~n := #in~n; 7#L6true assume !(~n < 1); 10#L8true assume !(1 == ~n); 18#L11true call #t~ret0 := fibo(~n - 1);< 11#fiboENTRYtrue [2019-12-07 16:54:57,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:54:57,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1021, now seen corresponding path program 1 times [2019-12-07 16:54:57,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:54:57,628 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889971971] [2019-12-07 16:54:57,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:54:57,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:54:57,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:54:57,692 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 16:54:57,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:54:57,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 1 times [2019-12-07 16:54:57,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:54:57,693 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546839986] [2019-12-07 16:54:57,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:54:57,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:54:57,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:54:57,701 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 16:54:57,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:54:57,702 INFO L82 PathProgramCache]: Analyzing trace with hash 943411592, now seen corresponding path program 1 times [2019-12-07 16:54:57,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:54:57,703 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649438236] [2019-12-07 16:54:57,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:54:57,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:54:57,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:54:57,712 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 16:54:57,770 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 16:54:57,770 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 16:54:57,771 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 16:54:57,771 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 16:54:57,771 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 16:54:57,771 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:54:57,771 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 16:54:57,771 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 16:54:57,771 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration1_Loop [2019-12-07 16:54:57,771 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 16:54:57,771 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 16:54:57,784 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:54:57,789 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:54:57,791 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:54:57,793 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:54:57,795 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:54:57,855 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 16:54:57,855 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:54:57,859 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 16:54:57,860 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 16:54:57,866 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 16:54:57,866 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_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:54:57,869 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 16:54:57,870 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 16:54:57,872 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 16:54:57,872 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_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:54:57,876 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 16:54:57,876 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 16:54:57,880 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 16:54:57,880 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_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:54:57,883 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 16:54:57,884 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 16:54:57,886 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 16:54:57,886 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_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:54:57,890 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 16:54:57,890 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:54:57,897 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 16:54:57,897 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 16:54:57,905 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-12-07 16:54:57,906 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 16:54:57,906 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 16:54:57,906 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 16:54:57,906 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 16:54:57,906 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 16:54:57,906 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:54:57,906 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 16:54:57,906 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 16:54:57,906 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration1_Loop [2019-12-07 16:54:57,907 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 16:54:57,907 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 16:54:57,908 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:54:57,910 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:54:57,912 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:54:57,914 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:54:57,916 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:54:57,950 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 16:54:57,954 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:54:57,957 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-12-07 16:54:57,959 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 16:54:57,959 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 16:54:57,959 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 16:54:57,959 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 16:54:57,959 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 16:54:57,961 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 16:54:57,961 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 16:54:57,963 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:54:57,966 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-12-07 16:54:57,967 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 16:54:57,968 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 16:54:57,968 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 16:54:57,968 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 16:54:57,968 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 16:54:57,968 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 16:54:57,968 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 16:54:57,970 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:54:57,973 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-12-07 16:54:57,974 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 16:54:57,975 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 16:54:57,975 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 16:54:57,975 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 16:54:57,975 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 16:54:57,975 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 16:54:57,976 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 16:54:57,977 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:54:57,980 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-12-07 16:54:57,982 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 16:54:57,982 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 16:54:57,982 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 16:54:57,982 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 16:54:57,982 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 16:54:57,983 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 16:54:57,983 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 16:54:57,984 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:54:57,988 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-12-07 16:54:57,989 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 16:54:57,989 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 16:54:57,989 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 16:54:57,989 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 16:54:57,989 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 16:54:57,990 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 16:54:57,990 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 16:54:57,992 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 16:54:57,996 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-12-07 16:54:57,996 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_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:54:57,999 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 16:54:58,000 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-12-07 16:54:58,000 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 16:54:58,000 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2019-12-07 16:54:58,003 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-12-07 16:54:58,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:54:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:54:58,030 INFO L264 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 16:54:58,031 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:54:58,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:54:58,043 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 16:54:58,044 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:54:58,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:54:58,076 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2019-12-07 16:54:58,077 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states. Second operand 4 states. [2019-12-07 16:54:58,147 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states.. Second operand 4 states. Result 47 states and 59 transitions. Complement of second has 12 states. [2019-12-07 16:54:58,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2019-12-07 16:54:58,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-12-07 16:54:58,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2019-12-07 16:54:58,150 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 4 letters. [2019-12-07 16:54:58,151 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 16:54:58,151 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 6 letters. Loop has 4 letters. [2019-12-07 16:54:58,151 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 16:54:58,152 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 8 letters. [2019-12-07 16:54:58,152 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 16:54:58,152 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 47 states and 59 transitions. [2019-12-07 16:54:58,156 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-12-07 16:54:58,160 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 47 states to 24 states and 33 transitions. [2019-12-07 16:54:58,161 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2019-12-07 16:54:58,161 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2019-12-07 16:54:58,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 33 transitions. [2019-12-07 16:54:58,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 16:54:58,163 INFO L688 BuchiCegarLoop]: Abstraction has 24 states and 33 transitions. [2019-12-07 16:54:58,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 33 transitions. [2019-12-07 16:54:58,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2019-12-07 16:54:58,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-12-07 16:54:58,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2019-12-07 16:54:58,183 INFO L711 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-12-07 16:54:58,183 INFO L591 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-12-07 16:54:58,183 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-12-07 16:54:58,183 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 25 transitions. [2019-12-07 16:54:58,184 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-12-07 16:54:58,184 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 16:54:58,184 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 16:54:58,184 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:54:58,184 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:54:58,185 INFO L794 eck$LassoCheckResult]: Stem: 120#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 121#L25 call main_#t~ret2 := fibo(main_~x~0);< 125#fiboENTRY ~n := #in~n; 126#L6 assume !(~n < 1); 124#L8 assume !(1 == ~n); 118#L11 call #t~ret0 := fibo(~n - 1);< 127#fiboENTRY ~n := #in~n; 128#L6 assume ~n < 1;#res := 0; 123#fiboFINAL assume true; 117#fiboEXIT >#32#return; 119#L11-1 [2019-12-07 16:54:58,185 INFO L796 eck$LassoCheckResult]: Loop: 119#L11-1 call #t~ret1 := fibo(~n - 2);< 132#fiboENTRY ~n := #in~n; 135#L6 assume !(~n < 1); 134#L8 assume !(1 == ~n); 130#L11 call #t~ret0 := fibo(~n - 1);< 132#fiboENTRY ~n := #in~n; 135#L6 assume ~n < 1;#res := 0; 131#fiboFINAL assume true; 133#fiboEXIT >#32#return; 119#L11-1 [2019-12-07 16:54:58,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:54:58,185 INFO L82 PathProgramCache]: Analyzing trace with hash 531553871, now seen corresponding path program 1 times [2019-12-07 16:54:58,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:54:58,185 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313329603] [2019-12-07 16:54:58,185 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:54:58,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:54:58,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:54:58,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:54:58,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313329603] [2019-12-07 16:54:58,249 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371813396] [2019-12-07 16:54:58,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:54:58,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:54:58,265 INFO L264 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 16:54:58,266 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:54:58,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:54:58,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:54:58,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-07 16:54:58,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093977485] [2019-12-07 16:54:58,282 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-12-07 16:54:58,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:54:58,283 INFO L82 PathProgramCache]: Analyzing trace with hash -606345326, now seen corresponding path program 1 times [2019-12-07 16:54:58,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:54:58,283 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225820240] [2019-12-07 16:54:58,284 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:54:58,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:54:58,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:54:58,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 16:54:58,319 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225820240] [2019-12-07 16:54:58,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 16:54:58,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 16:54:58,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749120873] [2019-12-07 16:54:58,319 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-12-07 16:54:58,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:54:58,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 16:54:58,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-12-07 16:54:58,323 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. cyclomatic complexity: 8 Second operand 6 states. [2019-12-07 16:54:58,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:54:58,379 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2019-12-07 16:54:58,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 16:54:58,380 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 31 transitions. [2019-12-07 16:54:58,381 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-12-07 16:54:58,383 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 23 states and 29 transitions. [2019-12-07 16:54:58,383 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2019-12-07 16:54:58,383 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2019-12-07 16:54:58,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 29 transitions. [2019-12-07 16:54:58,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 16:54:58,383 INFO L688 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-12-07 16:54:58,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 29 transitions. [2019-12-07 16:54:58,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-12-07 16:54:58,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-12-07 16:54:58,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2019-12-07 16:54:58,387 INFO L711 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-12-07 16:54:58,387 INFO L591 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-12-07 16:54:58,387 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-12-07 16:54:58,387 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 29 transitions. [2019-12-07 16:54:58,388 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-12-07 16:54:58,389 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 16:54:58,389 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 16:54:58,389 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:54:58,390 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 16:54:58,390 INFO L794 eck$LassoCheckResult]: Stem: 220#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 221#L25 call main_#t~ret2 := fibo(main_~x~0);< 225#fiboENTRY ~n := #in~n; 226#L6 assume !(~n < 1); 224#L8 assume !(1 == ~n); 218#L11 call #t~ret0 := fibo(~n - 1);< 227#fiboENTRY ~n := #in~n; 228#L6 assume !(~n < 1); 222#L8 assume 1 == ~n;#res := 1; 223#fiboFINAL assume true; 217#fiboEXIT >#32#return; 219#L11-1 [2019-12-07 16:54:58,390 INFO L796 eck$LassoCheckResult]: Loop: 219#L11-1 call #t~ret1 := fibo(~n - 2);< 232#fiboENTRY ~n := #in~n; 239#L6 assume !(~n < 1); 238#L8 assume !(1 == ~n); 230#L11 call #t~ret0 := fibo(~n - 1);< 232#fiboENTRY ~n := #in~n; 239#L6 assume !(~n < 1); 238#L8 assume 1 == ~n;#res := 1; 236#fiboFINAL assume true; 234#fiboEXIT >#32#return; 219#L11-1 [2019-12-07 16:54:58,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:54:58,390 INFO L82 PathProgramCache]: Analyzing trace with hash -701674289, now seen corresponding path program 1 times [2019-12-07 16:54:58,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:54:58,391 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121758348] [2019-12-07 16:54:58,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:54:58,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:54:58,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:54:58,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:54:58,430 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121758348] [2019-12-07 16:54:58,430 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689873211] [2019-12-07 16:54:58,430 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:54:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:54:58,446 INFO L264 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 16:54:58,447 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:54:58,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:54:58,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:54:58,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-07 16:54:58,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626697919] [2019-12-07 16:54:58,457 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-12-07 16:54:58,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:54:58,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1616811028, now seen corresponding path program 1 times [2019-12-07 16:54:58,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:54:58,457 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391066327] [2019-12-07 16:54:58,457 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:54:58,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:54:58,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:54:58,465 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 16:54:58,547 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 16:54:58,547 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 16:54:58,547 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 16:54:58,547 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 16:54:58,547 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 16:54:58,547 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:54:58,547 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 16:54:58,547 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 16:54:58,547 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration3_Loop [2019-12-07 16:54:58,547 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 16:54:58,548 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 16:54:58,548 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:54:58,554 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:54:58,557 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:54:58,558 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:54:58,590 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 16:54:58,590 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:54:58,593 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 16:54:58,594 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:54:58,601 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 16:54:58,601 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 16:54:58,983 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-12-07 16:54:58,985 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 16:54:58,985 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 16:54:58,985 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 16:54:58,985 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 16:54:58,985 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 16:54:58,985 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:54:58,985 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 16:54:58,985 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 16:54:58,985 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration3_Loop [2019-12-07 16:54:58,985 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 16:54:58,986 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 16:54:58,986 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:54:58,989 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:54:58,996 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:54:58,998 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:54:59,025 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 16:54:59,025 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:54:59,032 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-12-07 16:54:59,033 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 16:54:59,033 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 16:54:59,033 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 16:54:59,033 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 16:54:59,033 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 16:54:59,034 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 16:54:59,034 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 16:54:59,036 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:54:59,040 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-12-07 16:54:59,041 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 16:54:59,041 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 16:54:59,041 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 16:54:59,042 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 16:54:59,042 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 16:54:59,043 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 16:54:59,043 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 16:54:59,045 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 16:54:59,048 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-12-07 16:54:59,049 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_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:54:59,051 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 16:54:59,051 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-12-07 16:54:59,052 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 16:54:59,052 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-12-07 16:54:59,054 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-12-07 16:54:59,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:54:59,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:54:59,074 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 16:54:59,075 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:54:59,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:54:59,098 INFO L264 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-07 16:54:59,099 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:54:59,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:54:59,131 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2019-12-07 16:54:59,131 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8 Second operand 7 states. [2019-12-07 16:54:59,238 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8. Second operand 7 states. Result 134 states and 182 transitions. Complement of second has 28 states. [2019-12-07 16:54:59,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2019-12-07 16:54:59,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-12-07 16:54:59,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 34 transitions. [2019-12-07 16:54:59,239 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 10 letters. [2019-12-07 16:54:59,240 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 16:54:59,240 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 21 letters. Loop has 10 letters. [2019-12-07 16:54:59,240 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 16:54:59,240 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 20 letters. [2019-12-07 16:54:59,241 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 16:54:59,241 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 134 states and 182 transitions. [2019-12-07 16:54:59,246 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-12-07 16:54:59,250 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 134 states to 107 states and 151 transitions. [2019-12-07 16:54:59,250 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 63 [2019-12-07 16:54:59,251 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2019-12-07 16:54:59,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 151 transitions. [2019-12-07 16:54:59,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 16:54:59,251 INFO L688 BuchiCegarLoop]: Abstraction has 107 states and 151 transitions. [2019-12-07 16:54:59,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states and 151 transitions. [2019-12-07 16:54:59,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2019-12-07 16:54:59,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-12-07 16:54:59,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2019-12-07 16:54:59,261 INFO L711 BuchiCegarLoop]: Abstraction has 93 states and 125 transitions. [2019-12-07 16:54:59,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:54:59,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 16:54:59,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-12-07 16:54:59,261 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand 8 states. [2019-12-07 16:54:59,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:54:59,313 INFO L93 Difference]: Finished difference Result 108 states and 146 transitions. [2019-12-07 16:54:59,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 16:54:59,314 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 108 states and 146 transitions. [2019-12-07 16:54:59,317 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-12-07 16:54:59,319 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 108 states to 105 states and 143 transitions. [2019-12-07 16:54:59,319 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 68 [2019-12-07 16:54:59,320 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2019-12-07 16:54:59,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 143 transitions. [2019-12-07 16:54:59,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 16:54:59,320 INFO L688 BuchiCegarLoop]: Abstraction has 105 states and 143 transitions. [2019-12-07 16:54:59,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states and 143 transitions. [2019-12-07 16:54:59,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2019-12-07 16:54:59,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-12-07 16:54:59,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 124 transitions. [2019-12-07 16:54:59,327 INFO L711 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2019-12-07 16:54:59,327 INFO L591 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2019-12-07 16:54:59,328 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-12-07 16:54:59,328 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 93 states and 124 transitions. [2019-12-07 16:54:59,329 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-12-07 16:54:59,329 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 16:54:59,329 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 16:54:59,330 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:54:59,330 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2019-12-07 16:54:59,331 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 [2019-12-07 16:54:59,331 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 [2019-12-07 16:54:59,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:54:59,331 INFO L82 PathProgramCache]: Analyzing trace with hash -240562386, now seen corresponding path program 1 times [2019-12-07 16:54:59,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:54:59,331 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960856752] [2019-12-07 16:54:59,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:54:59,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:54:59,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:54:59,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:54:59,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:54:59,407 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-07 16:54:59,407 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960856752] [2019-12-07 16:54:59,407 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286886955] [2019-12-07 16:54:59,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:54:59,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:54:59,430 INFO L264 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 16:54:59,431 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:54:59,445 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-07 16:54:59,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:54:59,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-12-07 16:54:59,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332783294] [2019-12-07 16:54:59,445 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-12-07 16:54:59,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:54:59,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1408722332, now seen corresponding path program 1 times [2019-12-07 16:54:59,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:54:59,446 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316577312] [2019-12-07 16:54:59,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:54:59,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:54:59,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:54:59,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:54:59,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:54:59,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:54:59,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:54:59,508 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 26 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-12-07 16:54:59,508 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316577312] [2019-12-07 16:54:59,508 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166072489] [2019-12-07 16:54:59,509 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:54:59,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:54:59,528 INFO L264 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 16:54:59,530 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:54:59,547 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-12-07 16:54:59,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:54:59,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-12-07 16:54:59,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580601818] [2019-12-07 16:54:59,548 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-12-07 16:54:59,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:54:59,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 16:54:59,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-12-07 16:54:59,549 INFO L87 Difference]: Start difference. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 12 states. [2019-12-07 16:54:59,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:54:59,674 INFO L93 Difference]: Finished difference Result 115 states and 158 transitions. [2019-12-07 16:54:59,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 16:54:59,675 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 115 states and 158 transitions. [2019-12-07 16:54:59,677 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2019-12-07 16:54:59,679 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 115 states to 113 states and 156 transitions. [2019-12-07 16:54:59,679 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 76 [2019-12-07 16:54:59,680 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 76 [2019-12-07 16:54:59,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 113 states and 156 transitions. [2019-12-07 16:54:59,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 16:54:59,680 INFO L688 BuchiCegarLoop]: Abstraction has 113 states and 156 transitions. [2019-12-07 16:54:59,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states and 156 transitions. [2019-12-07 16:54:59,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2019-12-07 16:54:59,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-12-07 16:54:59,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 156 transitions. [2019-12-07 16:54:59,687 INFO L711 BuchiCegarLoop]: Abstraction has 113 states and 156 transitions. [2019-12-07 16:54:59,687 INFO L591 BuchiCegarLoop]: Abstraction has 113 states and 156 transitions. [2019-12-07 16:54:59,687 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-12-07 16:54:59,687 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 113 states and 156 transitions. [2019-12-07 16:54:59,688 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2019-12-07 16:54:59,688 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 16:54:59,688 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 16:54:59,689 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:54:59,689 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2019-12-07 16:54:59,690 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 [2019-12-07 16:54:59,690 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 [2019-12-07 16:54:59,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:54:59,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1087292419, now seen corresponding path program 2 times [2019-12-07 16:54:59,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:54:59,690 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406134732] [2019-12-07 16:54:59,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:54:59,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:54:59,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:54:59,700 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 16:54:59,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:54:59,700 INFO L82 PathProgramCache]: Analyzing trace with hash 22774646, now seen corresponding path program 2 times [2019-12-07 16:54:59,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:54:59,701 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141628534] [2019-12-07 16:54:59,701 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:54:59,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:54:59,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:54:59,708 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 16:54:59,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:54:59,708 INFO L82 PathProgramCache]: Analyzing trace with hash 560101880, now seen corresponding path program 3 times [2019-12-07 16:54:59,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:54:59,708 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541783385] [2019-12-07 16:54:59,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:54:59,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:54:59,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:54:59,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:54:59,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:54:59,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:54:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:54:59,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:54:59,797 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 52 proven. 67 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-12-07 16:54:59,797 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541783385] [2019-12-07 16:54:59,797 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135849039] [2019-12-07 16:54:59,797 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:54:59,824 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-12-07 16:54:59,824 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:54:59,824 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-07 16:54:59,826 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:54:59,849 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 63 proven. 69 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-12-07 16:54:59,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:54:59,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2019-12-07 16:54:59,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290572593] [2019-12-07 16:54:59,993 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 16:54:59,993 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 16:54:59,993 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 16:54:59,993 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 16:54:59,993 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 16:54:59,994 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:54:59,994 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 16:54:59,994 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 16:54:59,994 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration5_Loop [2019-12-07 16:54:59,994 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 16:54:59,994 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 16:54:59,995 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:54:59,996 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:54:59,997 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:54:59,999 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:55:00,044 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 16:55:00,044 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:55:00,047 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 16:55:00,047 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 16:55:00,050 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 16:55:00,050 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_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:55:00,054 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 16:55:00,054 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 16:55:00,057 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 16:55:00,057 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_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:55:00,061 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 16:55:00,061 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 16:55:00,064 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 16:55:00,064 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_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:55:00,068 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 16:55:00,068 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:55:00,076 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 16:55:00,076 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 16:55:00,588 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-12-07 16:55:00,591 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 16:55:00,591 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 16:55:00,591 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 16:55:00,591 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 16:55:00,591 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 16:55:00,591 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:55:00,591 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 16:55:00,591 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 16:55:00,591 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration5_Loop [2019-12-07 16:55:00,591 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 16:55:00,591 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 16:55:00,592 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:55:00,594 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:55:00,595 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:55:00,601 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:55:00,644 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 16:55:00,644 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:55:00,647 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-12-07 16:55:00,648 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 16:55:00,648 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 16:55:00,649 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 16:55:00,649 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 16:55:00,649 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 16:55:00,649 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 16:55:00,649 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 16:55:00,650 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:55:00,655 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-12-07 16:55:00,656 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 16:55:00,656 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 16:55:00,657 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 16:55:00,657 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 16:55:00,657 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 16:55:00,657 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 16:55:00,657 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 16:55:00,659 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:55:00,665 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-12-07 16:55:00,666 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 16:55:00,666 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 16:55:00,666 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 16:55:00,666 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 16:55:00,666 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 16:55:00,667 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 16:55:00,667 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 16:55:00,670 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 16:55:00,671 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-12-07 16:55:00,672 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_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:55:00,678 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 16:55:00,678 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-12-07 16:55:00,678 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 16:55:00,678 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-12-07 16:55:00,680 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-12-07 16:55:00,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:55:00,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:55:00,719 INFO L264 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-07 16:55:00,721 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:55:00,736 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 16:55:00,739 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 16:55:00,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:55:00,759 INFO L264 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-07 16:55:00,760 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:55:00,803 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-07 16:55:00,803 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2019-12-07 16:55:00,803 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 156 transitions. cyclomatic complexity: 49 Second operand 8 states. [2019-12-07 16:55:00,925 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 156 transitions. cyclomatic complexity: 49. Second operand 8 states. Result 182 states and 248 transitions. Complement of second has 33 states. [2019-12-07 16:55:00,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2019-12-07 16:55:00,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-12-07 16:55:00,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 36 transitions. [2019-12-07 16:55:00,926 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 36 transitions. Stem has 31 letters. Loop has 22 letters. [2019-12-07 16:55:00,927 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 16:55:00,927 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-12-07 16:55:00,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:55:00,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:55:00,952 INFO L264 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-07 16:55:00,954 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:55:00,966 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 16:55:00,968 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 16:55:00,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:55:00,982 INFO L264 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-07 16:55:00,983 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:55:01,023 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-07 16:55:01,023 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 6 loop predicates [2019-12-07 16:55:01,024 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 156 transitions. cyclomatic complexity: 49 Second operand 8 states. [2019-12-07 16:55:01,130 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 156 transitions. cyclomatic complexity: 49. Second operand 8 states. Result 307 states and 417 transitions. Complement of second has 25 states. [2019-12-07 16:55:01,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2019-12-07 16:55:01,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-12-07 16:55:01,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 23 transitions. [2019-12-07 16:55:01,132 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 23 transitions. Stem has 31 letters. Loop has 22 letters. [2019-12-07 16:55:01,132 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 16:55:01,132 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-12-07 16:55:01,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:55:01,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:55:01,162 INFO L264 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-07 16:55:01,163 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:55:01,176 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 16:55:01,177 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 16:55:01,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:55:01,192 INFO L264 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-07 16:55:01,193 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:55:01,229 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-07 16:55:01,230 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2019-12-07 16:55:01,230 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 156 transitions. cyclomatic complexity: 49 Second operand 8 states. [2019-12-07 16:55:01,383 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 156 transitions. cyclomatic complexity: 49. Second operand 8 states. Result 1077 states and 1514 transitions. Complement of second has 130 states. [2019-12-07 16:55:01,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2019-12-07 16:55:01,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-12-07 16:55:01,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 41 transitions. [2019-12-07 16:55:01,385 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 31 letters. Loop has 22 letters. [2019-12-07 16:55:01,386 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 16:55:01,386 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 53 letters. Loop has 22 letters. [2019-12-07 16:55:01,387 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 16:55:01,387 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 31 letters. Loop has 44 letters. [2019-12-07 16:55:01,388 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 16:55:01,389 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1077 states and 1514 transitions. [2019-12-07 16:55:01,406 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 58 [2019-12-07 16:55:01,422 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1077 states to 604 states and 937 transitions. [2019-12-07 16:55:01,422 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 242 [2019-12-07 16:55:01,424 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 271 [2019-12-07 16:55:01,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 604 states and 937 transitions. [2019-12-07 16:55:01,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 16:55:01,424 INFO L688 BuchiCegarLoop]: Abstraction has 604 states and 937 transitions. [2019-12-07 16:55:01,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states and 937 transitions. [2019-12-07 16:55:01,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 475. [2019-12-07 16:55:01,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 475 states. [2019-12-07 16:55:01,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 723 transitions. [2019-12-07 16:55:01,458 INFO L711 BuchiCegarLoop]: Abstraction has 475 states and 723 transitions. [2019-12-07 16:55:01,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:55:01,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-07 16:55:01,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2019-12-07 16:55:01,459 INFO L87 Difference]: Start difference. First operand 475 states and 723 transitions. Second operand 16 states. [2019-12-07 16:55:01,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:55:01,657 INFO L93 Difference]: Finished difference Result 150 states and 188 transitions. [2019-12-07 16:55:01,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-07 16:55:01,658 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 150 states and 188 transitions. [2019-12-07 16:55:01,660 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-12-07 16:55:01,662 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 150 states to 150 states and 188 transitions. [2019-12-07 16:55:01,663 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 80 [2019-12-07 16:55:01,663 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 105 [2019-12-07 16:55:01,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 150 states and 188 transitions. [2019-12-07 16:55:01,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 16:55:01,663 INFO L688 BuchiCegarLoop]: Abstraction has 150 states and 188 transitions. [2019-12-07 16:55:01,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states and 188 transitions. [2019-12-07 16:55:01,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 121. [2019-12-07 16:55:01,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-12-07 16:55:01,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 142 transitions. [2019-12-07 16:55:01,668 INFO L711 BuchiCegarLoop]: Abstraction has 121 states and 142 transitions. [2019-12-07 16:55:01,668 INFO L591 BuchiCegarLoop]: Abstraction has 121 states and 142 transitions. [2019-12-07 16:55:01,668 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-12-07 16:55:01,669 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 121 states and 142 transitions. [2019-12-07 16:55:01,670 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-12-07 16:55:01,670 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 16:55:01,670 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 16:55:01,671 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [9, 7, 6, 6, 5, 3, 3, 2, 2, 2, 1, 1, 1] [2019-12-07 16:55:01,671 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-12-07 16:55:01,672 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 [2019-12-07 16:55:01,672 INFO L796 eck$LassoCheckResult]: Loop: 4547#fiboENTRY ~n := #in~n; 4636#L6 assume !(~n < 1); 4631#L8 assume !(1 == ~n); 4519#L11 call #t~ret0 := fibo(~n - 1);< 4547#fiboENTRY [2019-12-07 16:55:01,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:55:01,672 INFO L82 PathProgramCache]: Analyzing trace with hash -918730881, now seen corresponding path program 4 times [2019-12-07 16:55:01,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:55:01,672 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22008569] [2019-12-07 16:55:01,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:55:01,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:55:01,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:55:01,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:55:01,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:55:01,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:55:01,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:55:01,773 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 73 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-12-07 16:55:01,773 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22008569] [2019-12-07 16:55:01,773 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238616771] [2019-12-07 16:55:01,773 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:55:01,797 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 16:55:01,797 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:55:01,798 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 16:55:01,799 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:55:01,864 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 65 proven. 42 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-12-07 16:55:01,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:55:01,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2019-12-07 16:55:01,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27716505] [2019-12-07 16:55:01,865 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-12-07 16:55:01,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:55:01,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 2 times [2019-12-07 16:55:01,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:55:01,866 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434754213] [2019-12-07 16:55:01,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:55:01,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:55:01,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:55:01,868 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 16:55:01,889 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 16:55:01,889 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 16:55:01,889 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 16:55:01,889 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 16:55:01,889 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 16:55:01,889 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:55:01,889 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 16:55:01,889 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 16:55:01,889 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration6_Loop [2019-12-07 16:55:01,889 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 16:55:01,890 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 16:55:01,890 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:55:01,891 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:55:01,893 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:55:01,894 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:55:01,898 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:55:01,920 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 16:55:01,920 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:55:01,922 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 16:55:01,923 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 16:55:01,927 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 16:55:01,927 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_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:55:01,935 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 16:55:01,935 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 16:55:01,937 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 16:55:01,937 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_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:55:01,941 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 16:55:01,941 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 16:55:01,943 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 16:55:01,943 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_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:55:01,947 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 16:55:01,947 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:55:01,953 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 16:55:01,953 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 16:55:01,994 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-12-07 16:55:01,995 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 16:55:01,995 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 16:55:01,995 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 16:55:01,995 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 16:55:01,995 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 16:55:01,996 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:55:01,996 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 16:55:01,996 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 16:55:01,996 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration6_Loop [2019-12-07 16:55:01,996 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 16:55:01,996 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 16:55:01,997 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:55:01,998 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:55:01,999 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:55:02,000 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:55:02,004 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:55:02,026 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 16:55:02,026 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:55:02,029 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-12-07 16:55:02,030 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 16:55:02,030 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 16:55:02,030 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 16:55:02,030 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 16:55:02,030 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 16:55:02,031 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 16:55:02,031 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 16:55:02,032 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:55:02,036 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-12-07 16:55:02,037 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 16:55:02,038 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 16:55:02,038 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 16:55:02,038 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 16:55:02,038 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 16:55:02,038 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 16:55:02,038 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 16:55:02,039 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:55:02,045 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-12-07 16:55:02,046 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 16:55:02,046 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 16:55:02,046 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 16:55:02,046 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 16:55:02,046 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 16:55:02,046 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 16:55:02,046 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 16:55:02,047 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:55:02,052 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-12-07 16:55:02,053 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 16:55:02,053 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 16:55:02,053 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 16:55:02,053 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 16:55:02,053 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 16:55:02,054 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 16:55:02,054 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 16:55:02,055 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 16:55:02,057 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-12-07 16:55:02,058 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_3c389b9b-1c1f-4aad-a72c-16b51a8b3ffe/bin/uautomizer/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:55:02,060 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 16:55:02,060 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-12-07 16:55:02,060 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 16:55:02,060 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2019-12-07 16:55:02,061 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-12-07 16:55:02,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:55:02,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:55:02,097 INFO L264 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-07 16:55:02,098 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:55:02,110 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 16:55:02,112 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 16:55:02,113 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 16:55:02,115 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 16:55:02,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:55:02,121 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 16:55:02,121 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:55:02,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:55:02,133 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2019-12-07 16:55:02,133 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 121 states and 142 transitions. cyclomatic complexity: 24 Second operand 5 states. [2019-12-07 16:55:02,172 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 121 states and 142 transitions. cyclomatic complexity: 24. Second operand 5 states. Result 131 states and 152 transitions. Complement of second has 13 states. [2019-12-07 16:55:02,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-12-07 16:55:02,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-12-07 16:55:02,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2019-12-07 16:55:02,173 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 48 letters. Loop has 4 letters. [2019-12-07 16:55:02,173 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 16:55:02,173 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-12-07 16:55:02,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:55:02,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:55:02,209 INFO L264 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-07 16:55:02,210 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:55:02,222 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 16:55:02,223 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 16:55:02,224 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 16:55:02,225 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 16:55:02,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:55:02,231 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 16:55:02,231 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:55:02,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:55:02,243 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2019-12-07 16:55:02,243 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 121 states and 142 transitions. cyclomatic complexity: 24 Second operand 5 states. [2019-12-07 16:55:02,279 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 121 states and 142 transitions. cyclomatic complexity: 24. Second operand 5 states. Result 131 states and 152 transitions. Complement of second has 13 states. [2019-12-07 16:55:02,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-12-07 16:55:02,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-12-07 16:55:02,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2019-12-07 16:55:02,280 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 48 letters. Loop has 4 letters. [2019-12-07 16:55:02,280 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 16:55:02,280 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-12-07 16:55:02,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:55:02,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:55:02,321 INFO L264 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-07 16:55:02,322 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:55:02,335 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 16:55:02,336 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 16:55:02,337 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 16:55:02,338 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 16:55:02,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:55:02,343 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 16:55:02,344 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:55:02,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:55:02,355 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2019-12-07 16:55:02,355 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 121 states and 142 transitions. cyclomatic complexity: 24 Second operand 5 states. [2019-12-07 16:55:02,403 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 121 states and 142 transitions. cyclomatic complexity: 24. Second operand 5 states. Result 170 states and 193 transitions. Complement of second has 14 states. [2019-12-07 16:55:02,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-12-07 16:55:02,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-12-07 16:55:02,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 20 transitions. [2019-12-07 16:55:02,404 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 48 letters. Loop has 4 letters. [2019-12-07 16:55:02,404 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 16:55:02,404 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 52 letters. Loop has 4 letters. [2019-12-07 16:55:02,405 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 16:55:02,405 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 48 letters. Loop has 8 letters. [2019-12-07 16:55:02,405 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 16:55:02,405 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 170 states and 193 transitions. [2019-12-07 16:55:02,407 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-12-07 16:55:02,407 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 170 states to 0 states and 0 transitions. [2019-12-07 16:55:02,407 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-12-07 16:55:02,407 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-12-07 16:55:02,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-12-07 16:55:02,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-12-07 16:55:02,407 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 16:55:02,407 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 16:55:02,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:55:02,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-07 16:55:02,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2019-12-07 16:55:02,407 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 19 states. [2019-12-07 16:55:02,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:55:02,408 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2019-12-07 16:55:02,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 16:55:02,408 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2019-12-07 16:55:02,408 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-12-07 16:55:02,408 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 16:55:02,408 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-12-07 16:55:02,408 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-12-07 16:55:02,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-12-07 16:55:02,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-12-07 16:55:02,408 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 16:55:02,408 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 16:55:02,408 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 16:55:02,408 INFO L424 BuchiCegarLoop]: ======== Iteration 7============ [2019-12-07 16:55:02,408 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-12-07 16:55:02,408 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-12-07 16:55:02,408 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-12-07 16:55:02,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 07.12 04:55:02 BoogieIcfgContainer [2019-12-07 16:55:02,413 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-12-07 16:55:02,413 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 16:55:02,413 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 16:55:02,413 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 16:55:02,413 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:54:57" (3/4) ... [2019-12-07 16:55:02,416 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-12-07 16:55:02,416 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 16:55:02,417 INFO L168 Benchmark]: Toolchain (without parser) took 5203.99 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.0 MB). Free memory was 940.9 MB in the beginning and 997.2 MB in the end (delta: -56.4 MB). Peak memory consumption was 94.6 MB. Max. memory is 11.5 GB. [2019-12-07 16:55:02,417 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 955.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:55:02,418 INFO L168 Benchmark]: CACSL2BoogieTranslator took 174.74 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 95.4 MB). Free memory was 940.9 MB in the beginning and 1.1 GB in the end (delta: -152.1 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. [2019-12-07 16:55:02,418 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.29 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:55:02,418 INFO L168 Benchmark]: Boogie Preprocessor took 10.46 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:55:02,419 INFO L168 Benchmark]: RCFGBuilder took 126.34 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 11.5 GB. [2019-12-07 16:55:02,419 INFO L168 Benchmark]: BuchiAutomizer took 4867.16 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 55.6 MB). Free memory was 1.1 GB in the beginning and 997.2 MB in the end (delta: 75.5 MB). Peak memory consumption was 131.1 MB. Max. memory is 11.5 GB. [2019-12-07 16:55:02,419 INFO L168 Benchmark]: Witness Printer took 2.76 ms. Allocated memory is still 1.2 GB. Free memory is still 997.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:55:02,421 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 955.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 174.74 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 95.4 MB). Free memory was 940.9 MB in the beginning and 1.1 GB in the end (delta: -152.1 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 19.29 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.46 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 126.34 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 4867.16 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 55.6 MB). Free memory was 1.1 GB in the beginning and 997.2 MB in the end (delta: 75.5 MB). Peak memory consumption was 131.1 MB. Max. memory is 11.5 GB. * Witness Printer took 2.76 ms. Allocated memory is still 1.2 GB. Free memory is still 997.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 9 terminating modules (5 trivial, 2 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function n and consists of 9 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. 5 modules have a trivial ranking function, the largest among these consists of 19 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 4.8s and 7 iterations. TraceHistogramMax:9. Analysis of lassos took 2.7s. Construction of modules took 0.4s. Büchi inclusion checks took 1.4s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 7. Automata minimization 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 189 StatesRemovedByMinimization, 5 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 121 states and ocurred in iteration 5. Nontrivial modules had stage [2, 0, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 10/26 HoareTripleCheckerStatistics: 144 SDtfs, 387 SDslu, 153 SDs, 0 SdLazy, 699 SolverSat, 227 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT1 SILN0 SILU0 SILI2 SILT2 lasso0 LassoPreprocessingBenchmarks: Lassos: inital16 mio100 ax100 hnf100 lsp92 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq180 hnf93 smp79 dnf100 smp100 tf110 neg96 sie109 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 8ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 10 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...