./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_7-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_7-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/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 16ceff9c26892934dc007d0ff3b64a1ad7cbb0e9 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-20 11:33:09,599 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 11:33:09,601 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 11:33:09,615 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 11:33:09,616 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 11:33:09,617 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 11:33:09,619 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 11:33:09,627 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 11:33:09,631 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 11:33:09,634 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 11:33:09,635 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 11:33:09,636 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 11:33:09,636 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 11:33:09,638 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 11:33:09,639 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 11:33:09,640 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 11:33:09,641 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 11:33:09,642 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 11:33:09,644 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 11:33:09,647 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 11:33:09,651 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 11:33:09,653 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 11:33:09,656 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 11:33:09,656 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 11:33:09,660 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 11:33:09,661 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 11:33:09,661 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 11:33:09,662 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 11:33:09,663 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 11:33:09,664 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 11:33:09,664 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 11:33:09,665 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 11:33:09,666 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 11:33:09,666 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 11:33:09,667 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 11:33:09,667 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 11:33:09,668 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 11:33:09,668 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 11:33:09,669 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 11:33:09,669 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 11:33:09,671 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 11:33:09,671 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2019-11-20 11:33:09,699 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 11:33:09,699 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 11:33:09,700 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 11:33:09,700 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 11:33:09,700 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 11:33:09,700 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-20 11:33:09,701 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-20 11:33:09,701 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-20 11:33:09,701 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-20 11:33:09,701 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-20 11:33:09,701 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-20 11:33:09,702 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 11:33:09,702 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 11:33:09,702 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 11:33:09,702 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 11:33:09,702 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 11:33:09,702 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 11:33:09,703 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-20 11:33:09,703 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-20 11:33:09,703 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-20 11:33:09,703 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 11:33:09,703 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 11:33:09,703 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-20 11:33:09,704 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 11:33:09,704 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-20 11:33:09,704 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 11:33:09,704 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 11:33:09,704 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-20 11:33:09,705 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 11:33:09,705 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 11:33:09,705 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-20 11:33:09,706 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-20 11:33:09,706 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_4d753808-c259-4725-af8c-9b223e890583/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 -> 16ceff9c26892934dc007d0ff3b64a1ad7cbb0e9 [2019-11-20 11:33:09,871 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 11:33:09,883 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 11:33:09,889 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 11:33:09,897 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 11:33:09,897 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 11:33:09,898 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_7-2.c [2019-11-20 11:33:09,960 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/data/b91024e8b/0652617ea27046c1bb415b4ae06c5be7/FLAG734704e75 [2019-11-20 11:33:10,344 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 11:33:10,344 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/sv-benchmarks/c/recursive-simple/fibo_7-2.c [2019-11-20 11:33:10,350 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/data/b91024e8b/0652617ea27046c1bb415b4ae06c5be7/FLAG734704e75 [2019-11-20 11:33:10,768 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/data/b91024e8b/0652617ea27046c1bb415b4ae06c5be7 [2019-11-20 11:33:10,772 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 11:33:10,773 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 11:33:10,774 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 11:33:10,774 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 11:33:10,778 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 11:33:10,778 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:33:10" (1/1) ... [2019-11-20 11:33:10,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3279221c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:10, skipping insertion in model container [2019-11-20 11:33:10,781 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:33:10" (1/1) ... [2019-11-20 11:33:10,786 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 11:33:10,798 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 11:33:10,953 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 11:33:10,957 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 11:33:10,971 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 11:33:11,047 INFO L192 MainTranslator]: Completed translation [2019-11-20 11:33:11,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:11 WrapperNode [2019-11-20 11:33:11,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 11:33:11,048 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 11:33:11,048 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 11:33:11,048 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 11:33:11,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:11" (1/1) ... [2019-11-20 11:33:11,066 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:11" (1/1) ... [2019-11-20 11:33:11,082 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 11:33:11,082 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 11:33:11,082 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 11:33:11,082 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 11:33:11,088 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:11" (1/1) ... [2019-11-20 11:33:11,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:11" (1/1) ... [2019-11-20 11:33:11,089 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:11" (1/1) ... [2019-11-20 11:33:11,090 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:11" (1/1) ... [2019-11-20 11:33:11,091 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:11" (1/1) ... [2019-11-20 11:33:11,094 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:11" (1/1) ... [2019-11-20 11:33:11,095 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:11" (1/1) ... [2019-11-20 11:33:11,096 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 11:33:11,096 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 11:33:11,097 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 11:33:11,097 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 11:33:11,098 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:11" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:11,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 11:33:11,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 11:33:11,153 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2019-11-20 11:33:11,153 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2019-11-20 11:33:11,283 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 11:33:11,283 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-20 11:33:11,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:33:11 BoogieIcfgContainer [2019-11-20 11:33:11,285 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 11:33:11,285 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-20 11:33:11,286 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-20 11:33:11,289 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-20 11:33:11,290 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-20 11:33:11,290 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 20.11 11:33:10" (1/3) ... [2019-11-20 11:33:11,291 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@24a4678f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.11 11:33:11, skipping insertion in model container [2019-11-20 11:33:11,291 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-20 11:33:11,291 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:11" (2/3) ... [2019-11-20 11:33:11,292 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@24a4678f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.11 11:33:11, skipping insertion in model container [2019-11-20 11:33:11,293 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-20 11:33:11,293 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:33:11" (3/3) ... [2019-11-20 11:33:11,294 INFO L371 chiAutomizerObserver]: Analyzing ICFG fibo_7-2.c [2019-11-20 11:33:11,356 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-20 11:33:11,356 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-20 11:33:11,356 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-20 11:33:11,356 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 11:33:11,356 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 11:33:11,357 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-20 11:33:11,357 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 11:33:11,357 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-20 11:33:11,372 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2019-11-20 11:33:11,400 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-20 11:33:11,401 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 11:33:11,401 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 11:33:11,408 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-20 11:33:11,408 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-20 11:33:11,409 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-20 11:33:11,409 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2019-11-20 11:33:11,411 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-20 11:33:11,411 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 11:33:11,411 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 11:33:11,412 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-20 11:33:11,412 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-20 11:33:11,420 INFO L794 eck$LassoCheckResult]: Stem: 8#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 19#L25true call main_#t~ret2 := fibo(main_~x~0);< 11#fiboENTRYtrue [2019-11-20 11:33:11,420 INFO L796 eck$LassoCheckResult]: Loop: 11#fiboENTRYtrue ~n := #in~n; 7#L6true assume !(~n < 1); 10#L8true assume !(1 == ~n); 18#L11true call #t~ret0 := fibo(~n - 1);< 11#fiboENTRYtrue [2019-11-20 11:33:11,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:33:11,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1021, now seen corresponding path program 1 times [2019-11-20 11:33:11,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:33:11,448 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190270111] [2019-11-20 11:33:11,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:33:11,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:33:11,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:33:11,537 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 11:33:11,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:33:11,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 1 times [2019-11-20 11:33:11,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:33:11,539 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298085203] [2019-11-20 11:33:11,539 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:33:11,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:33:11,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:33:11,553 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 11:33:11,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:33:11,555 INFO L82 PathProgramCache]: Analyzing trace with hash 943411592, now seen corresponding path program 1 times [2019-11-20 11:33:11,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:33:11,556 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866671489] [2019-11-20 11:33:11,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:33:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:33:11,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:33:11,570 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 11:33:11,669 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 11:33:11,670 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 11:33:11,670 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 11:33:11,670 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 11:33:11,670 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 11:33:11,670 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:11,670 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 11:33:11,671 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 11:33:11,671 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration1_Loop [2019-11-20 11:33:11,671 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 11:33:11,671 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 11:33:11,686 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:11,698 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:11,702 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:11,706 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:11,710 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:11,787 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 11:33:11,788 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:11,793 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 11:33:11,794 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 11:33:11,801 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 11:33:11,801 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Exception during sending of exit command (exit): Broken pipe No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:11,813 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 11:33:11,813 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 11:33:11,818 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 11:33:11,818 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_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:11,827 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 11:33:11,827 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 11:33:11,830 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 11:33:11,830 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_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:11,835 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 11:33:11,835 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 11:33:11,839 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 11:33:11,839 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_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:11,845 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 11:33:11,845 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 11:33:11,857 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 11:33:11,857 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:11,869 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 11:33:11,871 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 11:33:11,871 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 11:33:11,871 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 11:33:11,871 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 11:33:11,872 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 11:33:11,872 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:11,872 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 11:33:11,872 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 11:33:11,872 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration1_Loop [2019-11-20 11:33:11,872 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 11:33:11,872 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 11:33:11,874 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:11,877 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:11,880 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:11,890 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:11,893 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:11,973 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 11:33:11,977 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 11:33:11,992 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 11:33:11,995 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 11:33:11,995 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 11:33:11,996 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 11:33:11,996 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 11:33:11,996 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:12,001 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 11:33:12,003 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 11:33:12,007 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 11:33:12,026 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 11:33:12,029 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 11:33:12,029 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 11:33:12,029 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 11:33:12,030 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 11:33:12,030 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 11:33:12,032 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 11:33:12,032 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:12,035 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 11:33:12,051 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 11:33:12,052 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 11:33:12,053 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 11:33:12,053 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 11:33:12,053 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 11:33:12,053 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 11:33:12,054 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 11:33:12,055 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:12,057 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 11:33:12,073 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 11:33:12,075 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 11:33:12,075 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 11:33:12,076 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 11:33:12,076 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 11:33:12,076 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 11:33:12,078 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 11:33:12,078 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:12,082 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 11:33:12,097 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 11:33:12,099 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 11:33:12,099 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 11:33:12,099 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 11:33:12,099 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 11:33:12,100 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 11:33:12,102 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 11:33:12,102 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:12,111 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 11:33:12,115 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-20 11:33:12,116 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_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 11:33:12,126 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 11:33:12,126 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:12,126 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 11:33:12,127 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2019-11-20 11:33:12,132 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-20 11:33:12,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:33:12,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:12,182 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 11:33:12,184 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:33:12,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:12,202 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 11:33:12,203 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:33:12,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:33:12,257 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2019-11-20 11:33:12,259 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states. Second operand 4 states. [2019-11-20 11:33:12,403 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states.. Second operand 4 states. Result 47 states and 59 transitions. Complement of second has 12 states. [2019-11-20 11:33:12,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-20 11:33:12,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-20 11:33:12,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2019-11-20 11:33:12,409 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 4 letters. [2019-11-20 11:33:12,411 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 11:33:12,411 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 6 letters. Loop has 4 letters. [2019-11-20 11:33:12,411 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 11:33:12,411 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 8 letters. [2019-11-20 11:33:12,412 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 11:33:12,413 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 47 states and 59 transitions. [2019-11-20 11:33:12,417 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-20 11:33:12,426 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 47 states to 24 states and 33 transitions. [2019-11-20 11:33:12,428 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2019-11-20 11:33:12,429 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2019-11-20 11:33:12,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 33 transitions. [2019-11-20 11:33:12,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 11:33:12,432 INFO L688 BuchiCegarLoop]: Abstraction has 24 states and 33 transitions. [2019-11-20 11:33:12,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 33 transitions. [2019-11-20 11:33:12,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2019-11-20 11:33:12,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-20 11:33:12,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2019-11-20 11:33:12,474 INFO L711 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-11-20 11:33:12,474 INFO L591 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-11-20 11:33:12,474 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-20 11:33:12,474 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 25 transitions. [2019-11-20 11:33:12,477 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-20 11:33:12,479 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 11:33:12,479 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 11:33:12,482 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:33:12,482 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:33:12,483 INFO L794 eck$LassoCheckResult]: Stem: 120#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 121#L25 call main_#t~ret2 := fibo(main_~x~0);< 125#fiboENTRY ~n := #in~n; 126#L6 assume !(~n < 1); 124#L8 assume !(1 == ~n); 118#L11 call #t~ret0 := fibo(~n - 1);< 127#fiboENTRY ~n := #in~n; 128#L6 assume ~n < 1;#res := 0; 123#fiboFINAL assume true; 117#fiboEXIT >#32#return; 119#L11-1 [2019-11-20 11:33:12,483 INFO L796 eck$LassoCheckResult]: Loop: 119#L11-1 call #t~ret1 := fibo(~n - 2);< 132#fiboENTRY ~n := #in~n; 135#L6 assume !(~n < 1); 134#L8 assume !(1 == ~n); 130#L11 call #t~ret0 := fibo(~n - 1);< 132#fiboENTRY ~n := #in~n; 135#L6 assume ~n < 1;#res := 0; 131#fiboFINAL assume true; 133#fiboEXIT >#32#return; 119#L11-1 [2019-11-20 11:33:12,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:33:12,484 INFO L82 PathProgramCache]: Analyzing trace with hash 531553871, now seen corresponding path program 1 times [2019-11-20 11:33:12,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:33:12,484 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447711405] [2019-11-20 11:33:12,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:33:12,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:12,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:12,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:33:12,599 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447711405] [2019-11-20 11:33:12,599 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833800233] [2019-11-20 11:33:12,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:33:12,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:12,646 INFO L255 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 11:33:12,647 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:33:12,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:33:12,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:33:12,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-20 11:33:12,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736737058] [2019-11-20 11:33:12,679 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-20 11:33:12,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:33:12,679 INFO L82 PathProgramCache]: Analyzing trace with hash -606345326, now seen corresponding path program 1 times [2019-11-20 11:33:12,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:33:12,679 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961146443] [2019-11-20 11:33:12,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:33:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:12,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:12,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 11:33:12,742 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961146443] [2019-11-20 11:33:12,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:33:12,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-20 11:33:12,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617718925] [2019-11-20 11:33:12,743 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-20 11:33:12,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:33:12,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 11:33:12,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-20 11:33:12,747 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. cyclomatic complexity: 8 Second operand 6 states. [2019-11-20 11:33:12,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:33:12,856 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2019-11-20 11:33:12,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 11:33:12,857 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 31 transitions. [2019-11-20 11:33:12,859 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-20 11:33:12,861 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 23 states and 29 transitions. [2019-11-20 11:33:12,861 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2019-11-20 11:33:12,861 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2019-11-20 11:33:12,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 29 transitions. [2019-11-20 11:33:12,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 11:33:12,861 INFO L688 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-20 11:33:12,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 29 transitions. [2019-11-20 11:33:12,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-20 11:33:12,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-20 11:33:12,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2019-11-20 11:33:12,874 INFO L711 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-20 11:33:12,874 INFO L591 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-20 11:33:12,875 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-20 11:33:12,875 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 29 transitions. [2019-11-20 11:33:12,876 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-20 11:33:12,877 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 11:33:12,878 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 11:33:12,879 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:33:12,879 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-11-20 11:33:12,879 INFO L794 eck$LassoCheckResult]: Stem: 220#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 221#L25 call main_#t~ret2 := fibo(main_~x~0);< 225#fiboENTRY ~n := #in~n; 226#L6 assume !(~n < 1); 224#L8 assume !(1 == ~n); 218#L11 call #t~ret0 := fibo(~n - 1);< 227#fiboENTRY ~n := #in~n; 228#L6 assume !(~n < 1); 222#L8 assume 1 == ~n;#res := 1; 223#fiboFINAL assume true; 217#fiboEXIT >#32#return; 219#L11-1 [2019-11-20 11:33:12,880 INFO L796 eck$LassoCheckResult]: Loop: 219#L11-1 call #t~ret1 := fibo(~n - 2);< 232#fiboENTRY ~n := #in~n; 239#L6 assume !(~n < 1); 238#L8 assume !(1 == ~n); 230#L11 call #t~ret0 := fibo(~n - 1);< 232#fiboENTRY ~n := #in~n; 239#L6 assume !(~n < 1); 238#L8 assume 1 == ~n;#res := 1; 236#fiboFINAL assume true; 234#fiboEXIT >#32#return; 219#L11-1 [2019-11-20 11:33:12,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:33:12,880 INFO L82 PathProgramCache]: Analyzing trace with hash -701674289, now seen corresponding path program 1 times [2019-11-20 11:33:12,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:33:12,881 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042456166] [2019-11-20 11:33:12,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:33:12,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:12,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:12,952 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:33:12,952 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042456166] [2019-11-20 11:33:12,953 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390298031] [2019-11-20 11:33:12,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-11-20 11:33:12,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:33:12,995 INFO L255 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 11:33:12,996 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:33:13,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:33:13,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:33:13,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-20 11:33:13,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740279371] [2019-11-20 11:33:13,022 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-20 11:33:13,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:33:13,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1616811028, now seen corresponding path program 1 times [2019-11-20 11:33:13,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:33:13,023 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985641148] [2019-11-20 11:33:13,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:33:13,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:33:13,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:33:13,044 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 11:33:13,195 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 11:33:13,195 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 11:33:13,195 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 11:33:13,195 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 11:33:13,195 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 11:33:13,195 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:13,195 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 11:33:13,196 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 11:33:13,196 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration3_Loop [2019-11-20 11:33:13,196 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 11:33:13,196 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 11:33:13,197 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:13,215 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:13,221 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:13,223 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:13,282 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 11:33:13,282 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/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 [2019-11-20 11:33:13,286 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 11:33:13,287 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 11:33:13,313 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 11:33:13,313 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:13,754 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 11:33:13,757 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 11:33:13,757 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 11:33:13,757 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 11:33:13,757 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 11:33:13,757 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 11:33:13,757 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:13,757 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 11:33:13,757 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 11:33:13,758 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration3_Loop [2019-11-20 11:33:13,758 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 11:33:13,758 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 11:33:13,759 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:13,765 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:13,773 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:13,776 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:13,844 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 11:33:13,844 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/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 [2019-11-20 11:33:13,848 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 11:33:13,850 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 11:33:13,850 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 11:33:13,850 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 11:33:13,850 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 11:33:13,851 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 11:33:13,852 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 11:33:13,852 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 11:33:13,853 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:13,859 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 11:33:13,861 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 11:33:13,861 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 11:33:13,862 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 11:33:13,862 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 11:33:13,862 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 11:33:13,865 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 11:33:13,866 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 11:33:13,869 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 11:33:13,876 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-20 11:33:13,877 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_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 11:33:13,892 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 11:33:13,893 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 11:33:13,893 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 11:33:13,893 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-11-20 11:33:13,900 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:13,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:33:13,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:13,948 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 11:33:13,949 INFO L278 TraceCheckSpWp]: Computing forward predicates... [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Exception during sending of exit command (exit): Broken pipe [2019-11-20 11:33:14,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:14,018 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-20 11:33:14,019 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:33:14,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:33:14,079 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2019-11-20 11:33:14,079 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8 Second operand 7 states. [2019-11-20 11:33:14,272 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8. Second operand 7 states. Result 134 states and 182 transitions. Complement of second has 28 states. [2019-11-20 11:33:14,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2019-11-20 11:33:14,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-20 11:33:14,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 34 transitions. [2019-11-20 11:33:14,276 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 10 letters. [2019-11-20 11:33:14,276 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 11:33:14,276 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 21 letters. Loop has 10 letters. [2019-11-20 11:33:14,277 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 11:33:14,277 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 20 letters. [2019-11-20 11:33:14,278 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 11:33:14,278 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 134 states and 182 transitions. [2019-11-20 11:33:14,286 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-20 11:33:14,292 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 134 states to 107 states and 151 transitions. [2019-11-20 11:33:14,292 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 63 [2019-11-20 11:33:14,293 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2019-11-20 11:33:14,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 151 transitions. [2019-11-20 11:33:14,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 11:33:14,294 INFO L688 BuchiCegarLoop]: Abstraction has 107 states and 151 transitions. [2019-11-20 11:33:14,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states and 151 transitions. [2019-11-20 11:33:14,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2019-11-20 11:33:14,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-20 11:33:14,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2019-11-20 11:33:14,309 INFO L711 BuchiCegarLoop]: Abstraction has 93 states and 125 transitions. [2019-11-20 11:33:14,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:33:14,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 11:33:14,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-20 11:33:14,310 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand 8 states. [2019-11-20 11:33:14,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:33:14,429 INFO L93 Difference]: Finished difference Result 108 states and 146 transitions. [2019-11-20 11:33:14,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 11:33:14,432 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 108 states and 146 transitions. [2019-11-20 11:33:14,437 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-20 11:33:14,445 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 108 states to 105 states and 143 transitions. [2019-11-20 11:33:14,445 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 68 [2019-11-20 11:33:14,446 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2019-11-20 11:33:14,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 143 transitions. [2019-11-20 11:33:14,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 11:33:14,446 INFO L688 BuchiCegarLoop]: Abstraction has 105 states and 143 transitions. [2019-11-20 11:33:14,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states and 143 transitions. [2019-11-20 11:33:14,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2019-11-20 11:33:14,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-20 11:33:14,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 124 transitions. [2019-11-20 11:33:14,462 INFO L711 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2019-11-20 11:33:14,465 INFO L591 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2019-11-20 11:33:14,465 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-20 11:33:14,465 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 93 states and 124 transitions. [2019-11-20 11:33:14,468 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-20 11:33:14,468 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 11:33:14,468 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 11:33:14,470 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:33:14,470 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2019-11-20 11:33:14,471 INFO L794 eck$LassoCheckResult]: Stem: 744#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 745#L25 call main_#t~ret2 := fibo(main_~x~0);< 769#fiboENTRY ~n := #in~n; 793#L6 assume !(~n < 1); 752#L8 assume !(1 == ~n); 753#L11 call #t~ret0 := fibo(~n - 1);< 759#fiboENTRY ~n := #in~n; 761#L6 assume !(~n < 1); 772#L8 assume !(1 == ~n); 760#L11 call #t~ret0 := fibo(~n - 1);< 759#fiboENTRY ~n := #in~n; 761#L6 assume !(~n < 1); 772#L8 assume !(1 == ~n); 760#L11 call #t~ret0 := fibo(~n - 1);< 759#fiboENTRY ~n := #in~n; 762#L6 assume !(~n < 1); 796#L8 assume 1 == ~n;#res := 1; 795#fiboFINAL assume true; 794#fiboEXIT >#32#return; 757#L11-1 call #t~ret1 := fibo(~n - 2);< 756#fiboENTRY ~n := #in~n; 758#L6 assume ~n < 1;#res := 0; 823#fiboFINAL assume true; 817#fiboEXIT >#34#return; 814#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 812#fiboFINAL assume true; 802#fiboEXIT >#32#return; 804#L11-1 [2019-11-20 11:33:14,471 INFO L796 eck$LassoCheckResult]: Loop: 804#L11-1 call #t~ret1 := fibo(~n - 2);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume !(1 == ~n); 808#L11 call #t~ret0 := fibo(~n - 1);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume !(1 == ~n); 808#L11 call #t~ret0 := fibo(~n - 1);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume 1 == ~n;#res := 1; 816#fiboFINAL assume true; 813#fiboEXIT >#32#return; 804#L11-1 call #t~ret1 := fibo(~n - 2);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume !(1 == ~n); 808#L11 call #t~ret0 := fibo(~n - 1);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume 1 == ~n;#res := 1; 816#fiboFINAL assume true; 813#fiboEXIT >#32#return; 804#L11-1 call #t~ret1 := fibo(~n - 2);< 810#fiboENTRY ~n := #in~n; 818#L6 assume ~n < 1;#res := 0; 819#fiboFINAL assume true; 821#fiboEXIT >#34#return; 809#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 811#fiboFINAL assume true; 807#fiboEXIT >#34#return; 809#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 811#fiboFINAL assume true; 807#fiboEXIT >#32#return; 804#L11-1 [2019-11-20 11:33:14,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:33:14,472 INFO L82 PathProgramCache]: Analyzing trace with hash -240562386, now seen corresponding path program 1 times [2019-11-20 11:33:14,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:33:14,472 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241334538] [2019-11-20 11:33:14,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:33:14,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:14,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:14,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:14,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:14,618 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-20 11:33:14,618 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241334538] [2019-11-20 11:33:14,618 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469618573] [2019-11-20 11:33:14,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:33:14,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:14,644 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 11:33:14,646 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:33:14,674 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-20 11:33:14,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:33:14,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-20 11:33:14,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482556016] [2019-11-20 11:33:14,676 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-20 11:33:14,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:33:14,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1408722332, now seen corresponding path program 1 times [2019-11-20 11:33:14,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:33:14,676 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51185916] [2019-11-20 11:33:14,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:33:14,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:14,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:14,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:14,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:14,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:14,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:14,823 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 26 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-20 11:33:14,824 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51185916] [2019-11-20 11:33:14,824 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438228743] [2019-11-20 11:33:14,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:33:14,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:14,862 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 11:33:14,864 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:33:14,898 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-20 11:33:14,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:33:14,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-11-20 11:33:14,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103316960] [2019-11-20 11:33:14,899 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-20 11:33:14,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:33:14,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 11:33:14,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-11-20 11:33:14,900 INFO L87 Difference]: Start difference. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 12 states. [2019-11-20 11:33:15,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:33:15,153 INFO L93 Difference]: Finished difference Result 115 states and 157 transitions. [2019-11-20 11:33:15,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 11:33:15,157 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 115 states and 157 transitions. [2019-11-20 11:33:15,160 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2019-11-20 11:33:15,163 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 115 states to 113 states and 155 transitions. [2019-11-20 11:33:15,163 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 76 [2019-11-20 11:33:15,164 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 76 [2019-11-20 11:33:15,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 113 states and 155 transitions. [2019-11-20 11:33:15,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 11:33:15,165 INFO L688 BuchiCegarLoop]: Abstraction has 113 states and 155 transitions. [2019-11-20 11:33:15,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states and 155 transitions. [2019-11-20 11:33:15,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2019-11-20 11:33:15,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-20 11:33:15,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 155 transitions. [2019-11-20 11:33:15,177 INFO L711 BuchiCegarLoop]: Abstraction has 113 states and 155 transitions. [2019-11-20 11:33:15,177 INFO L591 BuchiCegarLoop]: Abstraction has 113 states and 155 transitions. [2019-11-20 11:33:15,177 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-11-20 11:33:15,178 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 113 states and 155 transitions. [2019-11-20 11:33:15,180 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2019-11-20 11:33:15,180 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 11:33:15,180 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 11:33:15,181 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:33:15,182 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2019-11-20 11:33:15,182 INFO L794 eck$LassoCheckResult]: Stem: 1248#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 1249#L25 call main_#t~ret2 := fibo(main_~x~0);< 1278#fiboENTRY ~n := #in~n; 1308#L6 assume !(~n < 1); 1307#L8 assume !(1 == ~n); 1256#L11 call #t~ret0 := fibo(~n - 1);< 1273#fiboENTRY ~n := #in~n; 1274#L6 assume !(~n < 1); 1255#L8 assume !(1 == ~n); 1257#L11 call #t~ret0 := fibo(~n - 1);< 1301#fiboENTRY ~n := #in~n; 1305#L6 assume !(~n < 1); 1303#L8 assume !(1 == ~n); 1263#L11 call #t~ret0 := fibo(~n - 1);< 1301#fiboENTRY ~n := #in~n; 1305#L6 assume !(~n < 1); 1303#L8 assume !(1 == ~n); 1263#L11 call #t~ret0 := fibo(~n - 1);< 1301#fiboENTRY ~n := #in~n; 1306#L6 assume !(~n < 1); 1304#L8 assume 1 == ~n;#res := 1; 1302#fiboFINAL assume true; 1300#fiboEXIT >#32#return; 1243#L11-1 call #t~ret1 := fibo(~n - 2);< 1298#fiboENTRY ~n := #in~n; 1345#L6 assume ~n < 1;#res := 0; 1344#fiboFINAL assume true; 1342#fiboEXIT >#34#return; 1340#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 1339#fiboFINAL assume true; 1332#fiboEXIT >#32#return; 1260#L11-1 [2019-11-20 11:33:15,182 INFO L796 eck$LassoCheckResult]: Loop: 1260#L11-1 call #t~ret1 := fibo(~n - 2);< 1276#fiboENTRY ~n := #in~n; 1309#L6 assume !(~n < 1); 1311#L8 assume !(1 == ~n); 1262#L11 call #t~ret0 := fibo(~n - 1);< 1276#fiboENTRY ~n := #in~n; 1309#L6 assume !(~n < 1); 1311#L8 assume !(1 == ~n); 1262#L11 call #t~ret0 := fibo(~n - 1);< 1276#fiboENTRY ~n := #in~n; 1309#L6 assume !(~n < 1); 1311#L8 assume 1 == ~n;#res := 1; 1254#fiboFINAL assume true; 1346#fiboEXIT >#32#return; 1252#L11-1 call #t~ret1 := fibo(~n - 2);< 1271#fiboENTRY ~n := #in~n; 1272#L6 assume ~n < 1;#res := 0; 1310#fiboFINAL assume true; 1347#fiboEXIT >#34#return; 1244#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 1258#fiboFINAL assume true; 1264#fiboEXIT >#32#return; 1260#L11-1 [2019-11-20 11:33:15,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:33:15,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1087292419, now seen corresponding path program 2 times [2019-11-20 11:33:15,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:33:15,183 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704727673] [2019-11-20 11:33:15,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:33:15,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:15,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:15,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:15,306 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-20 11:33:15,306 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704727673] [2019-11-20 11:33:15,306 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061249810] [2019-11-20 11:33:15,306 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:33:15,339 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 11:33:15,339 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 11:33:15,340 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 11:33:15,342 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:33:15,371 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-20 11:33:15,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:33:15,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-20 11:33:15,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640950619] [2019-11-20 11:33:15,374 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-20 11:33:15,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:33:15,375 INFO L82 PathProgramCache]: Analyzing trace with hash 22774646, now seen corresponding path program 2 times [2019-11-20 11:33:15,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:33:15,376 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353327067] [2019-11-20 11:33:15,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:33:15,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:33:15,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:33:15,403 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 11:33:15,668 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 11:33:15,668 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 11:33:15,668 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 11:33:15,668 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 11:33:15,669 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 11:33:15,669 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:15,669 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 11:33:15,669 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 11:33:15,669 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration5_Loop [2019-11-20 11:33:15,669 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 11:33:15,669 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 11:33:15,670 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:15,671 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:15,674 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:15,676 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:15,741 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 11:33:15,741 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:15,757 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 11:33:15,757 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 11:33:15,761 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 11:33:15,761 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_4d753808-c259-4725-af8c-9b223e890583/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) [2019-11-20 11:33:15,773 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 11:33:15,773 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:15,778 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 11:33:15,778 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_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:15,787 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 11:33:15,787 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 11:33:15,790 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 11:33:15,790 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_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:15,795 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 11:33:15,795 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:15,803 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 11:33:15,803 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 11:33:16,351 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 11:33:16,353 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 11:33:16,354 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 11:33:16,354 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 11:33:16,354 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 11:33:16,354 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 11:33:16,354 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:16,354 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 11:33:16,354 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 11:33:16,354 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration5_Loop [2019-11-20 11:33:16,354 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 11:33:16,354 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 11:33:16,355 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:16,369 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:16,371 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:16,381 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:16,453 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 11:33:16,453 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:16,457 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 11:33:16,459 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 11:33:16,459 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 11:33:16,459 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 11:33:16,459 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 11:33:16,460 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 11:33:16,462 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 11:33:16,462 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 11:33:16,464 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:16,469 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 11:33:16,470 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 11:33:16,470 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 11:33:16,470 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 11:33:16,471 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 11:33:16,471 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 11:33:16,471 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 11:33:16,471 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 11:33:16,472 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:16,477 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 11:33:16,478 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 11:33:16,478 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 11:33:16,478 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 11:33:16,478 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 11:33:16,479 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 11:33:16,480 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 11:33:16,481 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 11:33:16,486 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 11:33:16,492 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-20 11:33:16,492 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_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 11:33:16,504 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 11:33:16,505 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 11:33:16,505 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 11:33:16,505 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-11-20 11:33:16,507 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:16,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:33:16,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:16,578 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-20 11:33:16,580 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:33:16,610 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:33:16,614 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:33:16,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:16,641 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-20 11:33:16,643 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:33:16,703 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-20 11:33:16,704 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2019-11-20 11:33:16,704 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48 Second operand 8 states. [2019-11-20 11:33:16,912 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48. Second operand 8 states. Result 182 states and 247 transitions. Complement of second has 33 states. [2019-11-20 11:33:16,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2019-11-20 11:33:16,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-20 11:33:16,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 36 transitions. [2019-11-20 11:33:16,914 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 36 transitions. Stem has 31 letters. Loop has 22 letters. [2019-11-20 11:33:16,914 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 11:33:16,914 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 11:33:16,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:33:16,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:16,963 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-20 11:33:16,965 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:33:16,986 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:33:16,988 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:33:17,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:17,017 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-20 11:33:17,019 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:33:17,084 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-20 11:33:17,085 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 6 loop predicates [2019-11-20 11:33:17,085 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48 Second operand 8 states. [2019-11-20 11:33:17,270 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48. Second operand 8 states. Result 307 states and 416 transitions. Complement of second has 25 states. [2019-11-20 11:33:17,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2019-11-20 11:33:17,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-20 11:33:17,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 23 transitions. [2019-11-20 11:33:17,274 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 23 transitions. Stem has 31 letters. Loop has 22 letters. [2019-11-20 11:33:17,274 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 11:33:17,274 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 11:33:17,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:33:17,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:17,326 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-20 11:33:17,328 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:33:17,355 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:33:17,357 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:33:17,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:17,387 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-20 11:33:17,388 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:33:17,448 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-20 11:33:17,448 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2019-11-20 11:33:17,448 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48 Second operand 8 states. [2019-11-20 11:33:17,710 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48. Second operand 8 states. Result 1077 states and 1512 transitions. Complement of second has 130 states. [2019-11-20 11:33:17,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2019-11-20 11:33:17,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-20 11:33:17,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 41 transitions. [2019-11-20 11:33:17,712 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 31 letters. Loop has 22 letters. [2019-11-20 11:33:17,717 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 11:33:17,717 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 53 letters. Loop has 22 letters. [2019-11-20 11:33:17,720 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 11:33:17,721 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 31 letters. Loop has 44 letters. [2019-11-20 11:33:17,725 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 11:33:17,725 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1077 states and 1512 transitions. [2019-11-20 11:33:17,749 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 58 [2019-11-20 11:33:17,772 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1077 states to 604 states and 935 transitions. [2019-11-20 11:33:17,772 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 242 [2019-11-20 11:33:17,775 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 271 [2019-11-20 11:33:17,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 604 states and 935 transitions. [2019-11-20 11:33:17,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 11:33:17,779 INFO L688 BuchiCegarLoop]: Abstraction has 604 states and 935 transitions. [2019-11-20 11:33:17,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states and 935 transitions. [2019-11-20 11:33:17,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 477. [2019-11-20 11:33:17,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2019-11-20 11:33:17,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 725 transitions. [2019-11-20 11:33:17,846 INFO L711 BuchiCegarLoop]: Abstraction has 477 states and 725 transitions. [2019-11-20 11:33:17,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:33:17,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-20 11:33:17,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2019-11-20 11:33:17,851 INFO L87 Difference]: Start difference. First operand 477 states and 725 transitions. Second operand 14 states. [2019-11-20 11:33:18,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:33:18,151 INFO L93 Difference]: Finished difference Result 537 states and 809 transitions. [2019-11-20 11:33:18,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-20 11:33:18,152 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 537 states and 809 transitions. [2019-11-20 11:33:18,162 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-20 11:33:18,173 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 537 states to 534 states and 802 transitions. [2019-11-20 11:33:18,173 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 239 [2019-11-20 11:33:18,174 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 239 [2019-11-20 11:33:18,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 534 states and 802 transitions. [2019-11-20 11:33:18,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 11:33:18,176 INFO L688 BuchiCegarLoop]: Abstraction has 534 states and 802 transitions. [2019-11-20 11:33:18,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states and 802 transitions. [2019-11-20 11:33:18,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 494. [2019-11-20 11:33:18,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 494 states. [2019-11-20 11:33:18,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 746 transitions. [2019-11-20 11:33:18,199 INFO L711 BuchiCegarLoop]: Abstraction has 494 states and 746 transitions. [2019-11-20 11:33:18,199 INFO L591 BuchiCegarLoop]: Abstraction has 494 states and 746 transitions. [2019-11-20 11:33:18,199 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-11-20 11:33:18,199 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 494 states and 746 transitions. [2019-11-20 11:33:18,203 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-20 11:33:18,203 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 11:33:18,203 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 11:33:18,205 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2019-11-20 11:33:18,205 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-20 11:33:18,206 INFO L794 eck$LassoCheckResult]: Stem: 4807#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 4808#L25 call main_#t~ret2 := fibo(main_~x~0);< 4845#fiboENTRY ~n := #in~n; 4869#L6 assume !(~n < 1); 4868#L8 assume !(1 == ~n); 4864#L11 call #t~ret0 := fibo(~n - 1);< 4867#fiboENTRY ~n := #in~n; 4866#L6 assume !(~n < 1); 4865#L8 assume !(1 == ~n); 4860#L11 call #t~ret0 := fibo(~n - 1);< 4862#fiboENTRY ~n := #in~n; 4863#L6 assume !(~n < 1); 4859#L8 assume !(1 == ~n); 4811#L11 call #t~ret0 := fibo(~n - 1);< 4856#fiboENTRY ~n := #in~n; 4857#L6 assume !(~n < 1); 4861#L8 assume !(1 == ~n); 4810#L11 call #t~ret0 := fibo(~n - 1);< 4856#fiboENTRY ~n := #in~n; 4858#L6 assume !(~n < 1); 4809#L8 assume 1 == ~n;#res := 1; 4812#fiboFINAL assume true; 4953#fiboEXIT >#32#return; 4933#L11-1 call #t~ret1 := fibo(~n - 2);< 4941#fiboENTRY ~n := #in~n; 5030#L6 assume !(~n < 1); 4957#L8 assume !(1 == ~n); 4958#L11 call #t~ret0 := fibo(~n - 1);< 4967#fiboENTRY ~n := #in~n; 5112#L6 assume !(~n < 1); 5035#L8 assume !(1 == ~n); 5036#L11 call #t~ret0 := fibo(~n - 1);< 5054#fiboENTRY [2019-11-20 11:33:18,206 INFO L796 eck$LassoCheckResult]: Loop: 5054#fiboENTRY ~n := #in~n; 5065#L6 assume !(~n < 1); 5062#L8 assume !(1 == ~n); 5051#L11 call #t~ret0 := fibo(~n - 1);< 5054#fiboENTRY [2019-11-20 11:33:18,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:33:18,206 INFO L82 PathProgramCache]: Analyzing trace with hash 116207529, now seen corresponding path program 1 times [2019-11-20 11:33:18,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:33:18,207 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295830767] [2019-11-20 11:33:18,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:33:18,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:18,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:18,451 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:33:18,451 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295830767] [2019-11-20 11:33:18,451 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139738882] [2019-11-20 11:33:18,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:33:18,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:18,482 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 11:33:18,485 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:33:18,508 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 38 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-20 11:33:18,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:33:18,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13] total 20 [2019-11-20 11:33:18,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888713871] [2019-11-20 11:33:18,509 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-20 11:33:18,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:33:18,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 2 times [2019-11-20 11:33:18,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:33:18,510 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238053571] [2019-11-20 11:33:18,510 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:33:18,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:33:18,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:33:18,513 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 11:33:18,540 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 11:33:18,541 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 11:33:18,541 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 11:33:18,541 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 11:33:18,541 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 11:33:18,541 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:18,541 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 11:33:18,541 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 11:33:18,541 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration6_Loop [2019-11-20 11:33:18,541 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 11:33:18,541 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 11:33:18,542 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:18,544 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:18,546 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:18,548 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:18,554 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:18,589 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 11:33:18,589 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:18,595 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 11:33:18,595 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 11:33:18,599 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 11:33:18,599 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_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:18,603 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 11:33:18,604 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 11:33:18,606 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 11:33:18,606 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_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:18,611 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 11:33:18,611 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 11:33:18,614 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 11:33:18,614 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_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:18,619 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 11:33:18,619 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:18,626 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 11:33:18,627 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 11:33:18,669 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 11:33:18,671 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 11:33:18,671 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 11:33:18,671 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 11:33:18,671 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 11:33:18,671 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 11:33:18,671 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:18,672 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 11:33:18,672 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 11:33:18,672 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration6_Loop [2019-11-20 11:33:18,672 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 11:33:18,672 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 11:33:18,673 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:18,679 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:18,681 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:18,684 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:18,690 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:18,751 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 11:33:18,751 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/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) [2019-11-20 11:33:18,765 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 11:33:18,767 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 11:33:18,767 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 11:33:18,767 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 11:33:18,768 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 11:33:18,768 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 11:33:18,768 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 11:33:18,768 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:18,770 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:18,776 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 11:33:18,778 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 11:33:18,778 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 11:33:18,779 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 11:33:18,779 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 11:33:18,779 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 11:33:18,780 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 11:33:18,780 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 11:33:18,785 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:18,790 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 11:33:18,791 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 11:33:18,791 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 11:33:18,791 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 11:33:18,791 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 11:33:18,791 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 11:33:18,792 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 11:33:18,792 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 11:33:18,793 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:18,798 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 11:33:18,799 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 11:33:18,799 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 11:33:18,799 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 11:33:18,799 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 11:33:18,799 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 11:33:18,800 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 11:33:18,800 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 11:33:18,803 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 11:33:18,806 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-20 11:33:18,806 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_4d753808-c259-4725-af8c-9b223e890583/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) [2019-11-20 11:33:18,817 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 11:33:18,817 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 11:33:18,817 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 11:33:18,817 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2019-11-20 11:33:18,819 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:18,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:33:18,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:18,872 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-20 11:33:18,874 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:33:18,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:18,916 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 11:33:18,916 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:33:18,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:33:18,932 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2019-11-20 11:33:18,932 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262 Second operand 5 states. [2019-11-20 11:33:19,016 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262. Second operand 5 states. Result 507 states and 759 transitions. Complement of second has 13 states. [2019-11-20 11:33:19,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-20 11:33:19,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-20 11:33:19,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2019-11-20 11:33:19,018 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 32 letters. Loop has 4 letters. [2019-11-20 11:33:19,018 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 11:33:19,018 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 11:33:19,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:33:19,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:19,075 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-20 11:33:19,077 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:33:19,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:19,108 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 11:33:19,109 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:33:19,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:33:19,133 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2019-11-20 11:33:19,133 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262 Second operand 5 states. [2019-11-20 11:33:19,208 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262. Second operand 5 states. Result 507 states and 759 transitions. Complement of second has 13 states. [2019-11-20 11:33:19,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-20 11:33:19,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-20 11:33:19,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2019-11-20 11:33:19,209 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 32 letters. Loop has 4 letters. [2019-11-20 11:33:19,209 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 11:33:19,209 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 11:33:19,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:33:19,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:19,269 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-20 11:33:19,271 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:33:19,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:19,307 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 11:33:19,307 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:33:19,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:33:19,337 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2019-11-20 11:33:19,337 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262 Second operand 5 states. [2019-11-20 11:33:19,427 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262. Second operand 5 states. Result 650 states and 920 transitions. Complement of second has 14 states. [2019-11-20 11:33:19,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-20 11:33:19,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-20 11:33:19,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 20 transitions. [2019-11-20 11:33:19,430 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 32 letters. Loop has 4 letters. [2019-11-20 11:33:19,430 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 11:33:19,430 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 36 letters. Loop has 4 letters. [2019-11-20 11:33:19,431 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 11:33:19,431 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 32 letters. Loop has 8 letters. [2019-11-20 11:33:19,432 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 11:33:19,432 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 650 states and 920 transitions. [2019-11-20 11:33:19,441 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-20 11:33:19,450 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 650 states to 548 states and 806 transitions. [2019-11-20 11:33:19,450 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 199 [2019-11-20 11:33:19,450 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 208 [2019-11-20 11:33:19,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 548 states and 806 transitions. [2019-11-20 11:33:19,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 11:33:19,453 INFO L688 BuchiCegarLoop]: Abstraction has 548 states and 806 transitions. [2019-11-20 11:33:19,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states and 806 transitions. [2019-11-20 11:33:19,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 518. [2019-11-20 11:33:19,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 518 states. [2019-11-20 11:33:19,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 770 transitions. [2019-11-20 11:33:19,475 INFO L711 BuchiCegarLoop]: Abstraction has 518 states and 770 transitions. [2019-11-20 11:33:19,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:33:19,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-20 11:33:19,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2019-11-20 11:33:19,476 INFO L87 Difference]: Start difference. First operand 518 states and 770 transitions. Second operand 20 states. [2019-11-20 11:33:19,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:33:19,791 INFO L93 Difference]: Finished difference Result 585 states and 871 transitions. [2019-11-20 11:33:19,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-20 11:33:19,798 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 585 states and 871 transitions. [2019-11-20 11:33:19,806 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-20 11:33:19,814 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 585 states to 575 states and 857 transitions. [2019-11-20 11:33:19,814 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 221 [2019-11-20 11:33:19,815 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 221 [2019-11-20 11:33:19,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 575 states and 857 transitions. [2019-11-20 11:33:19,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 11:33:19,815 INFO L688 BuchiCegarLoop]: Abstraction has 575 states and 857 transitions. [2019-11-20 11:33:19,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states and 857 transitions. [2019-11-20 11:33:19,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 541. [2019-11-20 11:33:19,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 541 states. [2019-11-20 11:33:19,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 807 transitions. [2019-11-20 11:33:19,834 INFO L711 BuchiCegarLoop]: Abstraction has 541 states and 807 transitions. [2019-11-20 11:33:19,834 INFO L591 BuchiCegarLoop]: Abstraction has 541 states and 807 transitions. [2019-11-20 11:33:19,834 INFO L424 BuchiCegarLoop]: ======== Iteration 7============ [2019-11-20 11:33:19,834 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 541 states and 807 transitions. [2019-11-20 11:33:19,838 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-20 11:33:19,839 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 11:33:19,839 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 11:33:19,840 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [9, 9, 8, 7, 1, 1, 1, 1, 1, 1] [2019-11-20 11:33:19,840 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-20 11:33:19,840 INFO L794 eck$LassoCheckResult]: Stem: 8597#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 8598#L25 call main_#t~ret2 := fibo(main_~x~0);< 8631#fiboENTRY ~n := #in~n; 8671#L6 assume !(~n < 1); 8669#L8 assume !(1 == ~n); 8666#L11 call #t~ret0 := fibo(~n - 1);< 8667#fiboENTRY ~n := #in~n; 8677#L6 assume !(~n < 1); 8676#L8 assume !(1 == ~n); 8653#L11 call #t~ret0 := fibo(~n - 1);< 8675#fiboENTRY ~n := #in~n; 8679#L6 assume !(~n < 1); 8660#L8 assume !(1 == ~n); 8655#L11 call #t~ret0 := fibo(~n - 1);< 8657#fiboENTRY ~n := #in~n; 8711#L6 assume !(~n < 1); 8708#L8 assume !(1 == ~n); 8649#L11 call #t~ret0 := fibo(~n - 1);< 8656#fiboENTRY ~n := #in~n; 8721#L6 assume !(~n < 1); 8710#L8 assume !(1 == ~n); 8648#L11 call #t~ret0 := fibo(~n - 1);< 8656#fiboENTRY ~n := #in~n; 8730#L6 assume !(~n < 1); 8796#L8 assume 1 == ~n;#res := 1; 8794#fiboFINAL assume true; 8793#fiboEXIT >#32#return; 8785#L11-1 call #t~ret1 := fibo(~n - 2);< 8792#fiboENTRY ~n := #in~n; 9030#L6 assume !(~n < 1); 9006#L8 assume !(1 == ~n); 8600#L11 call #t~ret0 := fibo(~n - 1);< 8639#fiboENTRY ~n := #in~n; 8640#L6 assume !(~n < 1); 9118#L8 assume !(1 == ~n); 8633#L11 call #t~ret0 := fibo(~n - 1);< 8637#fiboENTRY ~n := #in~n; 8638#L6 assume !(~n < 1); 9103#L8 assume !(1 == ~n); 8634#L11 [2019-11-20 11:33:19,840 INFO L796 eck$LassoCheckResult]: Loop: 8634#L11 call #t~ret0 := fibo(~n - 1);< 8637#fiboENTRY ~n := #in~n; 8638#L6 assume !(~n < 1); 9103#L8 assume !(1 == ~n); 8634#L11 [2019-11-20 11:33:19,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:33:19,841 INFO L82 PathProgramCache]: Analyzing trace with hash -989900256, now seen corresponding path program 2 times [2019-11-20 11:33:19,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:33:19,841 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346792495] [2019-11-20 11:33:19,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:33:19,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:20,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:20,062 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 9 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:33:20,062 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346792495] [2019-11-20 11:33:20,062 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805453391] [2019-11-20 11:33:20,062 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:33:20,093 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 11:33:20,093 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 11:33:20,094 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-20 11:33:20,095 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:33:20,129 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 64 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-20 11:33:20,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:33:20,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15] total 23 [2019-11-20 11:33:20,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026807927] [2019-11-20 11:33:20,131 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-20 11:33:20,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:33:20,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 3 times [2019-11-20 11:33:20,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:33:20,131 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569146778] [2019-11-20 11:33:20,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:33:20,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:33:20,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:33:20,134 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 11:33:20,182 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 11:33:20,182 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 11:33:20,182 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 11:33:20,183 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 11:33:20,183 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 11:33:20,183 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:20,183 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 11:33:20,183 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 11:33:20,183 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration7_Loop [2019-11-20 11:33:20,183 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 11:33:20,183 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 11:33:20,184 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:20,186 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:20,188 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:20,190 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:20,261 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 11:33:20,261 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 11:33:20,280 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 11:33:20,280 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:20,285 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 11:33:20,285 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_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 11:33:20,291 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 11:33:20,292 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:20,296 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 11:33:20,296 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_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 11:33:20,303 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 11:33:20,303 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:20,307 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 11:33:20,307 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_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 11:33:20,314 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 11:33:20,314 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 11:33:20,329 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 11:33:20,329 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:26,516 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 11:33:26,518 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 11:33:26,518 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 11:33:26,518 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 11:33:26,518 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 11:33:26,518 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 11:33:26,518 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:26,518 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 11:33:26,518 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 11:33:26,518 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration7_Loop [2019-11-20 11:33:26,518 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 11:33:26,519 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 11:33:26,519 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:26,521 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:26,523 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:26,525 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:26,577 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 11:33:26,577 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 50 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 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:26,582 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 11:33:26,583 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 11:33:26,583 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 11:33:26,583 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 11:33:26,583 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 11:33:26,583 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 11:33:26,584 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 11:33:26,584 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 11:33:26,585 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 51 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 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:26,589 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 11:33:26,590 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 11:33:26,590 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 11:33:26,591 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 11:33:26,591 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 11:33:26,591 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 11:33:26,591 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 11:33:26,591 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 11:33:26,592 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 52 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 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:26,597 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 11:33:26,598 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 11:33:26,599 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 11:33:26,599 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 11:33:26,599 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 11:33:26,599 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 11:33:26,600 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 11:33:26,600 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 11:33:26,601 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 53 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 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:26,606 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 11:33:26,607 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 11:33:26,607 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 11:33:26,607 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 11:33:26,608 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 11:33:26,608 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 11:33:26,609 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 11:33:26,609 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 11:33:26,611 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 11:33:26,614 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-20 11:33:26,614 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_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 54 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 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:26,618 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 11:33:26,618 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 11:33:26,619 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 11:33:26,619 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-11-20 11:33:26,620 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-20 11:33:26,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Exception during sending of exit command (exit): Broken pipe [2019-11-20 11:33:26,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:26,706 INFO L255 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-20 11:33:26,708 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:33:26,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:26,741 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 11:33:26,741 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:33:26,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:33:26,773 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2019-11-20 11:33:26,773 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 541 states and 807 transitions. cyclomatic complexity: 276 Second operand 6 states. [2019-11-20 11:33:26,843 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 541 states and 807 transitions. cyclomatic complexity: 276. Second operand 6 states. Result 556 states and 823 transitions. Complement of second has 18 states. [2019-11-20 11:33:26,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2019-11-20 11:33:26,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-20 11:33:26,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2019-11-20 11:33:26,845 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 39 letters. Loop has 4 letters. [2019-11-20 11:33:26,845 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 11:33:26,845 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 11:33:26,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:33:26,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:26,910 INFO L255 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-20 11:33:26,911 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:33:26,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:26,961 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 11:33:26,961 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:33:27,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:33:27,008 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2019-11-20 11:33:27,008 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 541 states and 807 transitions. cyclomatic complexity: 276 Second operand 6 states. [2019-11-20 11:33:27,120 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 541 states and 807 transitions. cyclomatic complexity: 276. Second operand 6 states. Result 786 states and 1145 transitions. Complement of second has 22 states. [2019-11-20 11:33:27,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2019-11-20 11:33:27,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-20 11:33:27,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2019-11-20 11:33:27,122 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 39 letters. Loop has 4 letters. [2019-11-20 11:33:27,123 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 11:33:27,123 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 43 letters. Loop has 4 letters. [2019-11-20 11:33:27,123 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 11:33:27,123 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 39 letters. Loop has 8 letters. [2019-11-20 11:33:27,123 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 11:33:27,124 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 786 states and 1145 transitions. [2019-11-20 11:33:27,139 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-20 11:33:27,156 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 786 states to 719 states and 1073 transitions. [2019-11-20 11:33:27,157 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 241 [2019-11-20 11:33:27,157 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 269 [2019-11-20 11:33:27,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 719 states and 1073 transitions. [2019-11-20 11:33:27,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 11:33:27,158 INFO L688 BuchiCegarLoop]: Abstraction has 719 states and 1073 transitions. [2019-11-20 11:33:27,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states and 1073 transitions. [2019-11-20 11:33:27,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 706. [2019-11-20 11:33:27,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 706 states. [2019-11-20 11:33:27,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1056 transitions. [2019-11-20 11:33:27,186 INFO L711 BuchiCegarLoop]: Abstraction has 706 states and 1056 transitions. [2019-11-20 11:33:27,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:33:27,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-20 11:33:27,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2019-11-20 11:33:27,187 INFO L87 Difference]: Start difference. First operand 706 states and 1056 transitions. Second operand 23 states. [2019-11-20 11:33:28,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:33:28,068 INFO L93 Difference]: Finished difference Result 1715 states and 3613 transitions. [2019-11-20 11:33:28,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-20 11:33:28,069 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1715 states and 3613 transitions. [2019-11-20 11:33:28,095 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 156 [2019-11-20 11:33:28,138 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1715 states to 1469 states and 3094 transitions. [2019-11-20 11:33:28,139 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 506 [2019-11-20 11:33:28,140 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 533 [2019-11-20 11:33:28,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1469 states and 3094 transitions. [2019-11-20 11:33:28,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 11:33:28,141 INFO L688 BuchiCegarLoop]: Abstraction has 1469 states and 3094 transitions. [2019-11-20 11:33:28,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1469 states and 3094 transitions. [2019-11-20 11:33:28,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1469 to 1302. [2019-11-20 11:33:28,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1302 states. [2019-11-20 11:33:28,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 2622 transitions. [2019-11-20 11:33:28,205 INFO L711 BuchiCegarLoop]: Abstraction has 1302 states and 2622 transitions. [2019-11-20 11:33:28,206 INFO L591 BuchiCegarLoop]: Abstraction has 1302 states and 2622 transitions. [2019-11-20 11:33:28,206 INFO L424 BuchiCegarLoop]: ======== Iteration 8============ [2019-11-20 11:33:28,206 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 1302 states and 2622 transitions. [2019-11-20 11:33:28,216 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 147 [2019-11-20 11:33:28,216 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 11:33:28,217 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 11:33:28,220 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [11, 10, 9, 8, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-20 11:33:28,220 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-20 11:33:28,221 INFO L794 eck$LassoCheckResult]: Stem: 13389#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 13390#L25 call main_#t~ret2 := fibo(main_~x~0);< 13442#fiboENTRY ~n := #in~n; 13483#L6 assume !(~n < 1); 13482#L8 assume !(1 == ~n); 13478#L11 call #t~ret0 := fibo(~n - 1);< 13481#fiboENTRY ~n := #in~n; 13480#L6 assume !(~n < 1); 13479#L8 assume !(1 == ~n); 13474#L11 call #t~ret0 := fibo(~n - 1);< 13477#fiboENTRY ~n := #in~n; 13476#L6 assume !(~n < 1); 13475#L8 assume !(1 == ~n); 13434#L11 call #t~ret0 := fibo(~n - 1);< 13473#fiboENTRY ~n := #in~n; 13472#L6 assume !(~n < 1); 13471#L8 assume !(1 == ~n); 13466#L11 call #t~ret0 := fibo(~n - 1);< 13470#fiboENTRY ~n := #in~n; 13468#L6 assume !(~n < 1); 13469#L8 assume !(1 == ~n); 13462#L11 call #t~ret0 := fibo(~n - 1);< 13461#fiboENTRY ~n := #in~n; 13464#L6 assume !(~n < 1); 13467#L8 assume !(1 == ~n); 13463#L11 call #t~ret0 := fibo(~n - 1);< 13503#fiboENTRY ~n := #in~n; 13521#L6 assume !(~n < 1); 13518#L8 assume 1 == ~n;#res := 1; 13515#fiboFINAL assume true; 13511#fiboEXIT >#32#return; 13440#L11-1 call #t~ret1 := fibo(~n - 2);< 13460#fiboENTRY ~n := #in~n; 13439#L6 assume ~n < 1;#res := 0; 13441#fiboFINAL assume true; 14657#fiboEXIT >#34#return; 14560#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 14656#fiboFINAL assume true; 14499#fiboEXIT >#32#return; 14101#L11-1 call #t~ret1 := fibo(~n - 2);< 14494#fiboENTRY ~n := #in~n; 14579#L6 assume !(~n < 1); 14529#L8 assume !(1 == ~n); 13458#L11 call #t~ret0 := fibo(~n - 1);< 14098#fiboENTRY ~n := #in~n; 14097#L6 assume !(~n < 1); 14096#L8 assume !(1 == ~n); 13381#L11 call #t~ret0 := fibo(~n - 1);< 13589#fiboENTRY ~n := #in~n; 14076#L6 assume !(~n < 1); 14074#L8 assume !(1 == ~n); 13383#L11 [2019-11-20 11:33:28,222 INFO L796 eck$LassoCheckResult]: Loop: 13383#L11 call #t~ret0 := fibo(~n - 1);< 13589#fiboENTRY ~n := #in~n; 14076#L6 assume !(~n < 1); 14074#L8 assume !(1 == ~n); 13383#L11 [2019-11-20 11:33:28,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:33:28,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1997475882, now seen corresponding path program 3 times [2019-11-20 11:33:28,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:33:28,223 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545171468] [2019-11-20 11:33:28,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:33:28,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:28,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:28,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:28,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:28,468 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 129 proven. 47 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-20 11:33:28,468 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545171468] [2019-11-20 11:33:28,468 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386451424] [2019-11-20 11:33:28,469 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:33:28,507 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-20 11:33:28,507 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 11:33:28,508 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 11:33:28,509 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:33:28,562 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 106 proven. 19 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-11-20 11:33:28,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:33:28,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 22 [2019-11-20 11:33:28,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730622381] [2019-11-20 11:33:28,564 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-20 11:33:28,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:33:28,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 4 times [2019-11-20 11:33:28,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:33:28,565 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683623819] [2019-11-20 11:33:28,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:33:28,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:33:28,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:33:28,575 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 11:33:28,630 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 11:33:28,630 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 11:33:28,630 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 11:33:28,630 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 11:33:28,631 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 11:33:28,631 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:28,631 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 11:33:28,631 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 11:33:28,631 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration8_Loop [2019-11-20 11:33:28,631 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 11:33:28,631 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 11:33:28,631 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:28,641 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:28,642 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:28,645 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:28,685 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 11:33:28,685 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 56 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 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:28,690 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 11:33:28,690 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 57 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 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:28,701 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 11:33:28,701 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 11:33:31,600 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 11:33:31,601 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 11:33:31,601 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 11:33:31,602 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 11:33:31,602 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 11:33:31,602 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 11:33:31,602 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:31,602 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 11:33:31,602 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 11:33:31,602 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration8_Loop [2019-11-20 11:33:31,602 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 11:33:31,602 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 11:33:31,603 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:31,604 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:31,606 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:31,607 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 11:33:31,658 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 11:33:31,658 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 58 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 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:31,662 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 11:33:31,664 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 11:33:31,664 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 11:33:31,664 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 11:33:31,664 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 11:33:31,664 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 11:33:31,665 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 11:33:31,665 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 11:33:31,666 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 59 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 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:31,670 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 11:33:31,671 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 11:33:31,672 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 11:33:31,672 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 11:33:31,672 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 11:33:31,672 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 11:33:31,672 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 11:33:31,672 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 11:33:31,674 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 60 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 60 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:31,678 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 11:33:31,680 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 11:33:31,680 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 11:33:31,680 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 11:33:31,680 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 11:33:31,680 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 11:33:31,681 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 11:33:31,681 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 11:33:31,684 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 61 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 61 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:31,691 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 11:33:31,693 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 11:33:31,693 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 11:33:31,694 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 11:33:31,694 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 11:33:31,694 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 11:33:31,695 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 11:33:31,695 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 11:33:31,698 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 11:33:31,701 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-20 11:33:31,701 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_4d753808-c259-4725-af8c-9b223e890583/bin/uautomizer/z3 Starting monitored process 62 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 62 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 11:33:31,704 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 11:33:31,704 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 11:33:31,704 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 11:33:31,704 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-11-20 11:33:31,706 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-20 11:33:31,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:33:31,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:31,810 INFO L255 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-20 11:33:31,812 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:33:31,833 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:33:31,834 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:33:31,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:31,845 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 11:33:31,846 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:33:31,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:33:31,876 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2019-11-20 11:33:31,876 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 1302 states and 2622 transitions. cyclomatic complexity: 1333 Second operand 6 states. [2019-11-20 11:33:31,942 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 1302 states and 2622 transitions. cyclomatic complexity: 1333. Second operand 6 states. Result 1324 states and 2645 transitions. Complement of second has 18 states. [2019-11-20 11:33:31,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2019-11-20 11:33:31,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-20 11:33:31,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2019-11-20 11:33:31,944 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 51 letters. Loop has 4 letters. [2019-11-20 11:33:31,946 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 11:33:31,946 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 11:33:31,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:33:32,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:32,031 INFO L255 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-20 11:33:32,032 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:33:32,054 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:33:32,055 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:33:32,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:32,064 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 11:33:32,064 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:33:32,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:33:32,101 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2019-11-20 11:33:32,101 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 1302 states and 2622 transitions. cyclomatic complexity: 1333 Second operand 6 states. [2019-11-20 11:33:32,190 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 1302 states and 2622 transitions. cyclomatic complexity: 1333. Second operand 6 states. Result 1505 states and 2854 transitions. Complement of second has 22 states. [2019-11-20 11:33:32,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2019-11-20 11:33:32,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-20 11:33:32,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2019-11-20 11:33:32,192 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 51 letters. Loop has 4 letters. [2019-11-20 11:33:32,192 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 11:33:32,192 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 11:33:32,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:33:32,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:32,274 INFO L255 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-20 11:33:32,276 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:33:32,298 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:33:32,299 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:33:32,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:33:32,308 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 11:33:32,308 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:33:32,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:33:32,334 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 4 loop predicates [2019-11-20 11:33:32,334 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 1302 states and 2622 transitions. cyclomatic complexity: 1333 Second operand 6 states. [2019-11-20 11:33:32,412 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 1302 states and 2622 transitions. cyclomatic complexity: 1333. Second operand 6 states. Result 1635 states and 3078 transitions. Complement of second has 27 states. [2019-11-20 11:33:32,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2019-11-20 11:33:32,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-20 11:33:32,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2019-11-20 11:33:32,413 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 51 letters. Loop has 4 letters. [2019-11-20 11:33:32,413 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 11:33:32,414 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 55 letters. Loop has 4 letters. [2019-11-20 11:33:32,415 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 11:33:32,415 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 51 letters. Loop has 8 letters. [2019-11-20 11:33:32,415 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 11:33:32,415 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1635 states and 3078 transitions. [2019-11-20 11:33:32,437 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 147 [2019-11-20 11:33:32,469 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1635 states to 1302 states and 2622 transitions. [2019-11-20 11:33:32,469 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 411 [2019-11-20 11:33:32,471 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 447 [2019-11-20 11:33:32,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1302 states and 2622 transitions. [2019-11-20 11:33:32,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 11:33:32,471 INFO L688 BuchiCegarLoop]: Abstraction has 1302 states and 2622 transitions. [2019-11-20 11:33:32,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states and 2622 transitions. [2019-11-20 11:33:32,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1302. [2019-11-20 11:33:32,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1302 states. [2019-11-20 11:33:32,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 2622 transitions. [2019-11-20 11:33:32,533 INFO L711 BuchiCegarLoop]: Abstraction has 1302 states and 2622 transitions. [2019-11-20 11:33:32,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:33:32,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-20 11:33:32,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2019-11-20 11:33:32,534 INFO L87 Difference]: Start difference. First operand 1302 states and 2622 transitions. Second operand 22 states. [2019-11-20 11:33:32,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:33:32,944 INFO L93 Difference]: Finished difference Result 400 states and 513 transitions. [2019-11-20 11:33:32,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-20 11:33:32,948 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 400 states and 513 transitions. [2019-11-20 11:33:32,953 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-20 11:33:32,953 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 400 states to 0 states and 0 transitions. [2019-11-20 11:33:32,953 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-20 11:33:32,953 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-20 11:33:32,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-20 11:33:32,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-20 11:33:32,953 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 11:33:32,953 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 11:33:32,954 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 11:33:32,954 INFO L424 BuchiCegarLoop]: ======== Iteration 9============ [2019-11-20 11:33:32,954 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-11-20 11:33:32,954 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-20 11:33:32,954 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-11-20 11:33:32,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 20.11 11:33:32 BoogieIcfgContainer [2019-11-20 11:33:32,961 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-20 11:33:32,961 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 11:33:32,961 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 11:33:32,962 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 11:33:32,962 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:33:11" (3/4) ... [2019-11-20 11:33:32,965 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-20 11:33:32,966 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 11:33:32,968 INFO L168 Benchmark]: Toolchain (without parser) took 22193.84 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 188.7 MB). Free memory was 946.1 MB in the beginning and 956.5 MB in the end (delta: -10.4 MB). Peak memory consumption was 178.3 MB. Max. memory is 11.5 GB. [2019-11-20 11:33:32,968 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 11:33:32,969 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.38 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 113.8 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -162.4 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. [2019-11-20 11:33:32,969 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.84 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. [2019-11-20 11:33:32,969 INFO L168 Benchmark]: Boogie Preprocessor took 14.22 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. [2019-11-20 11:33:32,970 INFO L168 Benchmark]: RCFGBuilder took 188.61 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: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. [2019-11-20 11:33:32,970 INFO L168 Benchmark]: BuchiAutomizer took 21675.46 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 75.0 MB). Free memory was 1.1 GB in the beginning and 956.5 MB in the end (delta: 135.0 MB). Peak memory consumption was 210.0 MB. Max. memory is 11.5 GB. [2019-11-20 11:33:32,971 INFO L168 Benchmark]: Witness Printer took 4.54 ms. Allocated memory is still 1.2 GB. Free memory is still 956.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 11:33:32,973 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 273.38 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 113.8 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -162.4 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 33.84 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 14.22 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 188.61 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: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 21675.46 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 75.0 MB). Free memory was 1.1 GB in the beginning and 956.5 MB in the end (delta: 135.0 MB). Peak memory consumption was 210.0 MB. Max. memory is 11.5 GB. * Witness Printer took 4.54 ms. Allocated memory is still 1.2 GB. Free memory is still 956.5 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 13 terminating modules (7 trivial, 3 deterministic, 3 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 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. One nondeterministic module has affine ranking function n and consists of 6 locations. 7 modules have a trivial ranking function, the largest among these consists of 23 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 21.6s and 9 iterations. TraceHistogramMax:11. Analysis of lassos took 14.6s. Construction of modules took 1.9s. Büchi inclusion checks took 4.1s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 12. Automata minimization 0.3s AutomataMinimizationTime, 12 MinimizatonAttempts, 442 StatesRemovedByMinimization, 9 NontrivialMinimizations. Non-live state removal took 0.3s Buchi closure took 0.0s. Biggest automaton had 1302 states and ocurred in iteration 7. Nontrivial modules had stage [2, 1, 3, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 10/26 HoareTripleCheckerStatistics: 242 SDtfs, 659 SDslu, 475 SDs, 0 SdLazy, 1881 SolverSat, 522 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI2 SILT5 lasso0 LassoPreprocessingBenchmarks: Lassos: inital17 mio100 ax100 hnf98 lsp94 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq180 hnf93 smp78 dnf100 smp100 tf109 neg96 sie109 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 28ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 13 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 6 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 10.3s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...