./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/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 f63c6229f0a09709710be77b7ac5a08c2c6f5392 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 00:05:35,885 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 00:05:35,888 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 00:05:35,975 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 00:05:35,976 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 00:05:35,978 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 00:05:35,980 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 00:05:35,983 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 00:05:35,986 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 00:05:35,987 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 00:05:35,989 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 00:05:35,990 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 00:05:35,991 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 00:05:35,993 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 00:05:35,994 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 00:05:35,996 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 00:05:35,997 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 00:05:35,999 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 00:05:36,001 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 00:05:36,004 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 00:05:36,006 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 00:05:36,008 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 00:05:36,010 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 00:05:36,011 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 00:05:36,019 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 00:05:36,020 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 00:05:36,021 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 00:05:36,022 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 00:05:36,024 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 00:05:36,029 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 00:05:36,033 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 00:05:36,034 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 00:05:36,036 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 00:05:36,038 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 00:05:36,040 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 00:05:36,041 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 00:05:36,043 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 00:05:36,043 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 00:05:36,043 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 00:05:36,046 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 00:05:36,047 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 00:05:36,050 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-11-30 00:05:36,100 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 00:05:36,101 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 00:05:36,103 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 00:05:36,103 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 00:05:36,104 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 00:05:36,104 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-30 00:05:36,104 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-30 00:05:36,104 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-30 00:05:36,105 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-30 00:05:36,105 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-30 00:05:36,106 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-30 00:05:36,107 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 00:05:36,107 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 00:05:36,107 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 00:05:36,108 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 00:05:36,108 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 00:05:36,108 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 00:05:36,109 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-30 00:05:36,109 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-30 00:05:36,109 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-30 00:05:36,109 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 00:05:36,110 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 00:05:36,110 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-30 00:05:36,110 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 00:05:36,110 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-30 00:05:36,111 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 00:05:36,111 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 00:05:36,111 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-30 00:05:36,112 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 00:05:36,112 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 00:05:36,112 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 00:05:36,113 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-30 00:05:36,114 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-30 00:05:36,114 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f63c6229f0a09709710be77b7ac5a08c2c6f5392 [2020-11-30 00:05:36,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 00:05:36,447 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 00:05:36,450 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 00:05:36,451 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 00:05:36,453 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 00:05:36,454 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c [2020-11-30 00:05:36,561 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/data/3dfaca7b3/977ed8d89f1941a3967fdbc967226c97/FLAG866f77eb4 [2020-11-30 00:05:37,212 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 00:05:37,213 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c [2020-11-30 00:05:37,226 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/data/3dfaca7b3/977ed8d89f1941a3967fdbc967226c97/FLAG866f77eb4 [2020-11-30 00:05:37,596 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/data/3dfaca7b3/977ed8d89f1941a3967fdbc967226c97 [2020-11-30 00:05:37,598 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 00:05:37,602 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 00:05:37,619 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 00:05:37,619 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 00:05:37,622 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 00:05:37,623 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:05:37" (1/1) ... [2020-11-30 00:05:37,625 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e9dabf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:05:37, skipping insertion in model container [2020-11-30 00:05:37,626 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:05:37" (1/1) ... [2020-11-30 00:05:37,634 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 00:05:37,651 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 00:05:37,853 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:05:37,866 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 00:05:37,897 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:05:37,921 INFO L208 MainTranslator]: Completed translation [2020-11-30 00:05:37,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:05:37 WrapperNode [2020-11-30 00:05:37,924 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 00:05:37,926 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 00:05:37,926 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 00:05:37,927 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 00:05:37,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:05:37" (1/1) ... [2020-11-30 00:05:37,948 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:05:37" (1/1) ... [2020-11-30 00:05:37,969 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 00:05:37,971 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 00:05:37,971 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 00:05:37,971 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 00:05:37,981 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:05:37" (1/1) ... [2020-11-30 00:05:37,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:05:37" (1/1) ... [2020-11-30 00:05:37,999 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:05:37" (1/1) ... [2020-11-30 00:05:38,000 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:05:37" (1/1) ... [2020-11-30 00:05:38,002 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:05:37" (1/1) ... [2020-11-30 00:05:38,004 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:05:37" (1/1) ... [2020-11-30 00:05:38,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:05:37" (1/1) ... [2020-11-30 00:05:38,008 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 00:05:38,009 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 00:05:38,009 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 00:05:38,009 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 00:05:38,010 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:05:37" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/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 [2020-11-30 00:05:38,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 00:05:38,094 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-11-30 00:05:38,094 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-11-30 00:05:38,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 00:05:38,094 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-11-30 00:05:38,095 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-11-30 00:05:38,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 00:05:38,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 00:05:38,637 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 00:05:38,637 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-30 00:05:38,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:05:38 BoogieIcfgContainer [2020-11-30 00:05:38,640 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 00:05:38,641 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-30 00:05:38,641 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-30 00:05:38,645 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-30 00:05:38,646 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-30 00:05:38,646 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 30.11 12:05:37" (1/3) ... [2020-11-30 00:05:38,647 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3c459b6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 30.11 12:05:38, skipping insertion in model container [2020-11-30 00:05:38,647 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-30 00:05:38,648 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:05:37" (2/3) ... [2020-11-30 00:05:38,648 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3c459b6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 30.11 12:05:38, skipping insertion in model container [2020-11-30 00:05:38,648 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-30 00:05:38,648 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:05:38" (3/3) ... [2020-11-30 00:05:38,650 INFO L373 chiAutomizerObserver]: Analyzing ICFG fibo_2calls_8-2.c [2020-11-30 00:05:38,712 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-30 00:05:38,712 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-30 00:05:38,712 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-30 00:05:38,713 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 00:05:38,713 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 00:05:38,713 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-30 00:05:38,713 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 00:05:38,713 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-30 00:05:38,733 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 27 states. [2020-11-30 00:05:38,765 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-11-30 00:05:38,765 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:05:38,765 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:05:38,817 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-30 00:05:38,817 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:05:38,817 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-30 00:05:38,818 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 27 states. [2020-11-30 00:05:38,827 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-11-30 00:05:38,828 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:05:38,828 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:05:38,829 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-30 00:05:38,830 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:05:38,864 INFO L794 eck$LassoCheckResult]: Stem: 26#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 12#L-1true havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 22#L39true call main_#t~ret11 := fibo1(main_~x~0);< 27#fibo1ENTRYtrue [2020-11-30 00:05:38,864 INFO L796 eck$LassoCheckResult]: Loop: 27#fibo1ENTRYtrue ~n := #in~n; 4#L10true assume !(~n < 1); 10#L12true assume !(1 == ~n); 13#L15true call #t~ret7 := fibo2(~n - 1);< 15#fibo2ENTRYtrue ~n := #in~n; 28#L20true assume !(~n < 1); 20#L22true assume !(1 == ~n); 9#L25true call #t~ret9 := fibo1(~n - 1);< 27#fibo1ENTRYtrue [2020-11-30 00:05:38,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:05:38,883 INFO L82 PathProgramCache]: Analyzing trace with hash 29898, now seen corresponding path program 1 times [2020-11-30 00:05:38,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:05:38,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933133288] [2020-11-30 00:05:38,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:05:39,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:05:39,032 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:05:39,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:05:39,079 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:05:39,116 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:05:39,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:05:39,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1206117480, now seen corresponding path program 1 times [2020-11-30 00:05:39,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:05:39,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114626398] [2020-11-30 00:05:39,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:05:39,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:05:39,142 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:05:39,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:05:39,163 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:05:39,166 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:05:39,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:05:39,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1276411855, now seen corresponding path program 1 times [2020-11-30 00:05:39,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:05:39,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894003363] [2020-11-30 00:05:39,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:05:39,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:05:39,222 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:05:39,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:05:39,251 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:05:39,274 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:05:39,684 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:05:39,685 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:05:39,685 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:05:39,685 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:05:39,686 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-30 00:05:39,686 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:39,687 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:05:39,687 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:05:39,687 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration1_Loop [2020-11-30 00:05:39,688 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:05:39,688 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:05:39,711 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:39,723 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:39,730 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:39,738 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:39,748 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:39,760 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:39,768 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:39,776 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:39,785 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:39,821 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:40,062 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:05:40,063 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/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) [2020-11-30 00:05:40,077 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:05:40,077 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:40,090 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:05:40,090 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/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) [2020-11-30 00:05:40,144 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:05:40,145 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:40,151 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:05:40,151 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/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) [2020-11-30 00:05:40,203 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:05:40,203 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:40,209 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:05:40,209 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#in~n=0} Honda state: {fibo2_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/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 [2020-11-30 00:05:40,262 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:05:40,262 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:05:40,266 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:05:40,267 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret7=0} Honda state: {fibo1_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/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 [2020-11-30 00:05:40,298 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:05:40,299 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:05:40,302 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:05:40,303 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret8=0} Honda state: {fibo1_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:40,338 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:05:40,338 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:05:40,344 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:05:40,344 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_~n=0} Honda state: {fibo2_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/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) [2020-11-30 00:05:40,389 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:05:40,389 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:40,394 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:05:40,394 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/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) [2020-11-30 00:05:40,444 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:05:40,444 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:40,449 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:05:40,449 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret9=0} Honda state: {fibo2_#t~ret9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/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) [2020-11-30 00:05:40,500 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:05:40,500 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:40,547 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-30 00:05:40,548 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:05:40,645 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-30 00:05:40,646 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:05:40,646 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:05:40,646 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:05:40,647 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:05:40,647 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-30 00:05:40,647 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:40,647 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:05:40,647 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:05:40,647 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration1_Loop [2020-11-30 00:05:40,647 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:05:40,648 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:05:40,650 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:40,659 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:40,664 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:40,671 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:40,680 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:40,685 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:40,689 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:40,694 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:40,698 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:40,713 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:40,816 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:05:40,823 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:40,848 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 [2020-11-30 00:05:40,850 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:05:40,851 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:05:40,851 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:05:40,852 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:05:40,852 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:05:40,854 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:05:40,854 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:05:40,857 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:40,908 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 [2020-11-30 00:05:40,911 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:05:40,911 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:05:40,911 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:05:40,912 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:05:40,912 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:05:40,913 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:05:40,913 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:05:40,915 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:05:40,966 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-30 00:05:40,968 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:05:40,968 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:05:40,969 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:05:40,969 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:05:40,969 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:05:40,970 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:05:40,970 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:40,972 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:05:41,024 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 [2020-11-30 00:05:41,026 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:05:41,026 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:05:41,027 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:05:41,027 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:05:41,027 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:05:41,028 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:05:41,028 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:41,030 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/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 [2020-11-30 00:05:41,068 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-30 00:05:41,069 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:05:41,070 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:05:41,070 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:05:41,070 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:05:41,070 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:05:41,071 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:05:41,071 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:05:41,073 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:41,108 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 [2020-11-30 00:05:41,110 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:05:41,111 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:05:41,111 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:05:41,111 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:05:41,111 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:05:41,112 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:05:41,112 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:05:41,124 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/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 [2020-11-30 00:05:41,152 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 [2020-11-30 00:05:41,154 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:05:41,154 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:05:41,155 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:05:41,155 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:05:41,155 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:05:41,156 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:05:41,156 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:05:41,163 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/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 [2020-11-30 00:05:41,193 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 [2020-11-30 00:05:41,194 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:05:41,195 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:05:41,195 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:05:41,195 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:05:41,195 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:05:41,196 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:05:41,196 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:05:41,201 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:41,231 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 [2020-11-30 00:05:41,232 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:05:41,232 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:05:41,233 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:05:41,233 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:05:41,233 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:05:41,237 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:05:41,238 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:05:41,241 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-30 00:05:41,245 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-30 00:05:41,246 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:05:41,255 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-30 00:05:41,255 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-30 00:05:41,256 INFO L510 LassoAnalysis]: Proved termination. [2020-11-30 00:05:41,257 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_#in~n) = 1*fibo1_#in~n Supporting invariants [] [2020-11-30 00:05:41,300 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:41,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:05:41,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:41,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 00:05:41,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:05:41,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:41,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 00:05:41,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:05:41,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:05:41,567 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 5 loop predicates [2020-11-30 00:05:41,569 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 27 states. Second operand 6 states. [2020-11-30 00:05:41,924 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 27 states.. Second operand 6 states. Result 85 states and 117 transitions. Complement of second has 24 states. [2020-11-30 00:05:41,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 1 stem states 5 non-accepting loop states 1 accepting loop states [2020-11-30 00:05:41,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-30 00:05:41,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 21 transitions. [2020-11-30 00:05:41,936 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 3 letters. Loop has 8 letters. [2020-11-30 00:05:41,938 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:05:41,938 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 11 letters. Loop has 8 letters. [2020-11-30 00:05:41,939 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:05:41,939 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 3 letters. Loop has 16 letters. [2020-11-30 00:05:41,943 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:05:41,944 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 85 states and 117 transitions. [2020-11-30 00:05:41,966 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-11-30 00:05:41,974 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 85 states to 61 states and 82 transitions. [2020-11-30 00:05:41,977 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 39 [2020-11-30 00:05:41,978 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 40 [2020-11-30 00:05:41,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 82 transitions. [2020-11-30 00:05:41,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:05:41,980 INFO L691 BuchiCegarLoop]: Abstraction has 61 states and 82 transitions. [2020-11-30 00:05:42,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states and 82 transitions. [2020-11-30 00:05:42,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2020-11-30 00:05:42,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-30 00:05:42,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 72 transitions. [2020-11-30 00:05:42,041 INFO L714 BuchiCegarLoop]: Abstraction has 54 states and 72 transitions. [2020-11-30 00:05:42,041 INFO L594 BuchiCegarLoop]: Abstraction has 54 states and 72 transitions. [2020-11-30 00:05:42,041 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-30 00:05:42,041 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 54 states and 72 transitions. [2020-11-30 00:05:42,046 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-11-30 00:05:42,046 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:05:42,047 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:05:42,049 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:05:42,050 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:05:42,050 INFO L794 eck$LassoCheckResult]: Stem: 234#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 230#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 216#L39 call main_#t~ret11 := fibo1(main_~x~0);< 222#fibo1ENTRY ~n := #in~n; 215#L10 assume !(~n < 1); 217#L12 assume !(1 == ~n); 201#L15 call #t~ret7 := fibo2(~n - 1);< 233#fibo2ENTRY ~n := #in~n; 237#L20 assume !(~n < 1); 251#L22 assume !(1 == ~n); 212#L25 call #t~ret9 := fibo1(~n - 1);< 227#fibo1ENTRY ~n := #in~n; 211#L10 assume ~n < 1;#res := 0; 213#fibo1FINAL assume true; 220#fibo1EXIT >#48#return; 221#L25-1 [2020-11-30 00:05:42,051 INFO L796 eck$LassoCheckResult]: Loop: 221#L25-1 call #t~ret10 := fibo1(~n - 2);< 226#fibo1ENTRY ~n := #in~n; 246#L10 assume !(~n < 1); 247#L12 assume !(1 == ~n); 200#L15 call #t~ret7 := fibo2(~n - 1);< 239#fibo2ENTRY ~n := #in~n; 244#L20 assume !(~n < 1); 243#L22 assume !(1 == ~n); 224#L25 call #t~ret9 := fibo1(~n - 1);< 226#fibo1ENTRY ~n := #in~n; 246#L10 assume ~n < 1;#res := 0; 225#fibo1FINAL assume true; 229#fibo1EXIT >#48#return; 221#L25-1 [2020-11-30 00:05:42,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:05:42,051 INFO L82 PathProgramCache]: Analyzing trace with hash -722660232, now seen corresponding path program 1 times [2020-11-30 00:05:42,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:05:42,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854063280] [2020-11-30 00:05:42,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:05:42,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:42,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 00:05:42,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:42,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 00:05:42,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854063280] [2020-11-30 00:05:42,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:05:42,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 00:05:42,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409310988] [2020-11-30 00:05:42,238 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-30 00:05:42,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:05:42,239 INFO L82 PathProgramCache]: Analyzing trace with hash -880179458, now seen corresponding path program 1 times [2020-11-30 00:05:42,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:05:42,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755409447] [2020-11-30 00:05:42,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:05:42,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:42,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-30 00:05:42,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:42,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 00:05:42,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755409447] [2020-11-30 00:05:42,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:05:42,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 00:05:42,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189311224] [2020-11-30 00:05:42,319 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-30 00:05:42,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:05:42,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 00:05:42,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-30 00:05:42,324 INFO L87 Difference]: Start difference. First operand 54 states and 72 transitions. cyclomatic complexity: 20 Second operand 6 states. [2020-11-30 00:05:42,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:05:42,468 INFO L93 Difference]: Finished difference Result 68 states and 88 transitions. [2020-11-30 00:05:42,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 00:05:42,470 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 68 states and 88 transitions. [2020-11-30 00:05:42,474 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-11-30 00:05:42,477 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 68 states to 66 states and 86 transitions. [2020-11-30 00:05:42,477 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 46 [2020-11-30 00:05:42,478 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 46 [2020-11-30 00:05:42,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 86 transitions. [2020-11-30 00:05:42,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:05:42,479 INFO L691 BuchiCegarLoop]: Abstraction has 66 states and 86 transitions. [2020-11-30 00:05:42,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states and 86 transitions. [2020-11-30 00:05:42,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-11-30 00:05:42,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-30 00:05:42,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2020-11-30 00:05:42,490 INFO L714 BuchiCegarLoop]: Abstraction has 58 states and 76 transitions. [2020-11-30 00:05:42,490 INFO L594 BuchiCegarLoop]: Abstraction has 58 states and 76 transitions. [2020-11-30 00:05:42,490 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-30 00:05:42,490 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 58 states and 76 transitions. [2020-11-30 00:05:42,492 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-11-30 00:05:42,492 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:05:42,492 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:05:42,493 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:05:42,494 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:05:42,494 INFO L794 eck$LassoCheckResult]: Stem: 375#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 374#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 355#L39 call main_#t~ret11 := fibo1(main_~x~0);< 364#fibo1ENTRY ~n := #in~n; 354#L10 assume !(~n < 1); 356#L12 assume !(1 == ~n); 346#L15 call #t~ret7 := fibo2(~n - 1);< 378#fibo2ENTRY ~n := #in~n; 399#L20 assume !(~n < 1); 400#L22 assume !(1 == ~n); 352#L25 call #t~ret9 := fibo1(~n - 1);< 371#fibo1ENTRY ~n := #in~n; 351#L10 assume !(~n < 1); 353#L12 assume 1 == ~n;#res := 1; 372#fibo1FINAL assume true; 365#fibo1EXIT >#48#return; 366#L25-1 [2020-11-30 00:05:42,494 INFO L796 eck$LassoCheckResult]: Loop: 366#L25-1 call #t~ret10 := fibo1(~n - 2);< 370#fibo1ENTRY ~n := #in~n; 389#L10 assume !(~n < 1); 390#L12 assume !(1 == ~n); 344#L15 call #t~ret7 := fibo2(~n - 1);< 388#fibo2ENTRY ~n := #in~n; 395#L20 assume !(~n < 1); 393#L22 assume !(1 == ~n); 368#L25 call #t~ret9 := fibo1(~n - 1);< 370#fibo1ENTRY ~n := #in~n; 389#L10 assume !(~n < 1); 390#L12 assume 1 == ~n;#res := 1; 369#fibo1FINAL assume true; 373#fibo1EXIT >#48#return; 366#L25-1 [2020-11-30 00:05:42,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:05:42,495 INFO L82 PathProgramCache]: Analyzing trace with hash -927605802, now seen corresponding path program 1 times [2020-11-30 00:05:42,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:05:42,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225779865] [2020-11-30 00:05:42,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:05:42,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:42,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 00:05:42,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:42,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:05:42,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225779865] [2020-11-30 00:05:42,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903610003] [2020-11-30 00:05:42,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/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 [2020-11-30 00:05:42,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:42,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 00:05:42,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:05:42,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:05:42,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:05:42,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-30 00:05:42,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141248066] [2020-11-30 00:05:42,816 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-30 00:05:42,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:05:42,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1515734512, now seen corresponding path program 1 times [2020-11-30 00:05:42,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:05:42,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524521837] [2020-11-30 00:05:42,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:05:42,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:05:42,836 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:05:42,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:05:42,842 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:05:42,845 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:05:43,184 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:05:43,185 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:05:43,185 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:05:43,185 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:05:43,185 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-30 00:05:43,185 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:43,185 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:05:43,185 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:05:43,186 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration3_Loop [2020-11-30 00:05:43,186 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:05:43,186 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:05:43,187 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:43,210 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:43,215 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:43,219 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:43,223 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:43,234 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:43,238 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:43,243 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:43,248 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:43,352 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:05:43,352 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 23 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 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:43,363 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:05:43,364 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:05:43,368 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:05:43,368 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret7=0} Honda state: {fibo1_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/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 [2020-11-30 00:05:43,397 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:05:43,397 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:05:43,400 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:05:43,400 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret8=0} Honda state: {fibo1_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:43,427 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:05:43,427 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:05:43,430 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:05:43,430 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#in~n=0} Honda state: {fibo1_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/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) [2020-11-30 00:05:43,457 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:05:43,457 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:43,463 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:05:43,463 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/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 [2020-11-30 00:05:43,491 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:05:43,491 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/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 [2020-11-30 00:05:43,529 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-30 00:05:43,529 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:05:44,293 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-30 00:05:44,296 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:05:44,296 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:05:44,296 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:05:44,296 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:05:44,296 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-30 00:05:44,296 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:44,296 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:05:44,296 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:05:44,297 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration3_Loop [2020-11-30 00:05:44,297 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:05:44,297 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:05:44,298 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:44,332 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:44,336 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:44,339 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:44,350 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:44,355 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:44,358 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:44,372 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:44,379 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:44,496 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:05:44,496 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/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) [2020-11-30 00:05:44,500 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 [2020-11-30 00:05:44,502 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:05:44,502 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:05:44,503 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:05:44,503 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:05:44,503 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:05:44,516 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:05:44,516 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:44,519 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/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) [2020-11-30 00:05:44,568 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 [2020-11-30 00:05:44,570 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:05:44,571 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:05:44,571 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:05:44,571 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:05:44,571 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:05:44,572 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:05:44,572 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:44,574 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/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 [2020-11-30 00:05:44,618 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 [2020-11-30 00:05:44,620 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:05:44,620 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:05:44,621 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:05:44,621 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:05:44,621 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:05:44,622 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:05:44,622 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:05:44,628 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:44,654 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 [2020-11-30 00:05:44,656 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:05:44,656 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:05:44,656 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:05:44,656 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:05:44,656 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:05:44,658 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:05:44,659 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:05:44,664 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-30 00:05:44,681 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-30 00:05:44,681 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_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:05:44,685 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-30 00:05:44,685 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-30 00:05:44,685 INFO L510 LassoAnalysis]: Proved termination. [2020-11-30 00:05:44,685 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_~n) = 1*fibo2_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:44,718 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-30 00:05:44,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:05:44,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:44,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 00:05:44,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:05:44,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:44,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-30 00:05:44,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:05:45,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:05:45,048 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 8 loop predicates [2020-11-30 00:05:45,048 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 58 states and 76 transitions. cyclomatic complexity: 20 Second operand 10 states. [2020-11-30 00:05:45,802 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 58 states and 76 transitions. cyclomatic complexity: 20. Second operand 10 states. Result 191 states and 263 transitions. Complement of second has 40 states. [2020-11-30 00:05:45,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 2 stem states 9 non-accepting loop states 1 accepting loop states [2020-11-30 00:05:45,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-30 00:05:45,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 73 transitions. [2020-11-30 00:05:45,806 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 16 letters. Loop has 14 letters. [2020-11-30 00:05:45,806 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:05:45,807 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 30 letters. Loop has 14 letters. [2020-11-30 00:05:45,807 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:05:45,807 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 16 letters. Loop has 28 letters. [2020-11-30 00:05:45,809 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:05:45,809 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 191 states and 263 transitions. [2020-11-30 00:05:45,821 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-11-30 00:05:45,840 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 191 states to 169 states and 237 transitions. [2020-11-30 00:05:45,843 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 103 [2020-11-30 00:05:45,845 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 106 [2020-11-30 00:05:45,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 169 states and 237 transitions. [2020-11-30 00:05:45,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:05:45,847 INFO L691 BuchiCegarLoop]: Abstraction has 169 states and 237 transitions. [2020-11-30 00:05:45,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states and 237 transitions. [2020-11-30 00:05:45,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 152. [2020-11-30 00:05:45,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-11-30 00:05:45,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 206 transitions. [2020-11-30 00:05:45,870 INFO L714 BuchiCegarLoop]: Abstraction has 152 states and 206 transitions. [2020-11-30 00:05:45,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:05:45,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-30 00:05:45,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-11-30 00:05:45,871 INFO L87 Difference]: Start difference. First operand 152 states and 206 transitions. Second operand 10 states. [2020-11-30 00:05:46,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:05:46,127 INFO L93 Difference]: Finished difference Result 183 states and 244 transitions. [2020-11-30 00:05:46,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 00:05:46,128 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 183 states and 244 transitions. [2020-11-30 00:05:46,137 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-11-30 00:05:46,144 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 183 states to 180 states and 240 transitions. [2020-11-30 00:05:46,144 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 117 [2020-11-30 00:05:46,145 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 117 [2020-11-30 00:05:46,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 180 states and 240 transitions. [2020-11-30 00:05:46,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:05:46,145 INFO L691 BuchiCegarLoop]: Abstraction has 180 states and 240 transitions. [2020-11-30 00:05:46,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states and 240 transitions. [2020-11-30 00:05:46,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 167. [2020-11-30 00:05:46,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-11-30 00:05:46,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 225 transitions. [2020-11-30 00:05:46,166 INFO L714 BuchiCegarLoop]: Abstraction has 167 states and 225 transitions. [2020-11-30 00:05:46,166 INFO L594 BuchiCegarLoop]: Abstraction has 167 states and 225 transitions. [2020-11-30 00:05:46,166 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-30 00:05:46,166 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 167 states and 225 transitions. [2020-11-30 00:05:46,170 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-11-30 00:05:46,171 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:05:46,171 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:05:46,177 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [8, 7, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2020-11-30 00:05:46,177 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2020-11-30 00:05:46,178 INFO L794 eck$LassoCheckResult]: Stem: 1219#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 1214#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 1192#L39 call main_#t~ret11 := fibo1(main_~x~0);< 1193#fibo1ENTRY ~n := #in~n; 1257#L10 assume !(~n < 1); 1206#L12 assume !(1 == ~n); 1159#L15 call #t~ret7 := fibo2(~n - 1);< 1216#fibo2ENTRY ~n := #in~n; 1221#L20 assume !(~n < 1); 1175#L22 assume !(1 == ~n); 1176#L25 call #t~ret9 := fibo1(~n - 1);< 1205#fibo1ENTRY ~n := #in~n; 1182#L10 assume !(~n < 1); 1184#L12 assume !(1 == ~n); 1203#L15 call #t~ret7 := fibo2(~n - 1);< 1259#fibo2ENTRY ~n := #in~n; 1261#L20 assume !(~n < 1); 1262#L22 assume !(1 == ~n); 1183#L25 call #t~ret9 := fibo1(~n - 1);< 1205#fibo1ENTRY ~n := #in~n; 1182#L10 assume !(~n < 1); 1184#L12 assume !(1 == ~n); 1203#L15 call #t~ret7 := fibo2(~n - 1);< 1259#fibo2ENTRY ~n := #in~n; 1261#L20 assume ~n < 1;#res := 0; 1260#fibo2FINAL assume true; 1258#fibo2EXIT >#52#return; 1204#L15-1 call #t~ret8 := fibo2(~n - 2);< 1223#fibo2ENTRY ~n := #in~n; 1317#L20 assume !(~n < 1); 1316#L22 assume !(1 == ~n); 1183#L25 call #t~ret9 := fibo1(~n - 1);< 1205#fibo1ENTRY ~n := #in~n; 1256#L10 assume !(~n < 1); 1263#L12 assume 1 == ~n;#res := 1; 1264#fibo1FINAL assume true; 1251#fibo1EXIT >#48#return; 1208#L25-1 call #t~ret10 := fibo1(~n - 2);< 1213#fibo1ENTRY ~n := #in~n; 1249#L10 assume !(~n < 1); 1247#L12 assume !(1 == ~n); 1212#L15 call #t~ret7 := fibo2(~n - 1);< 1246#fibo2ENTRY ~n := #in~n; 1243#L20 assume ~n < 1;#res := 0; 1244#fibo2FINAL assume true; 1248#fibo2EXIT >#52#return; 1211#L15-1 call #t~ret8 := fibo2(~n - 2);< 1246#fibo2ENTRY ~n := #in~n; 1243#L20 assume !(~n < 1); 1239#L22 assume 1 == ~n;#res := 1; 1240#fibo2FINAL assume true; 1308#fibo2EXIT >#54#return; 1307#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 1319#fibo1FINAL assume true; 1318#fibo1EXIT >#50#return; 1188#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 1311#fibo2FINAL assume true; 1309#fibo2EXIT >#54#return; 1307#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 1319#fibo1FINAL assume true; 1318#fibo1EXIT >#48#return; 1186#L25-1 call #t~ret10 := fibo1(~n - 2);< 1300#fibo1ENTRY ~n := #in~n; 1298#L10 assume !(~n < 1); 1296#L12 assume !(1 == ~n); 1170#L15 call #t~ret7 := fibo2(~n - 1);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#52#return; 1172#L15-1 call #t~ret8 := fibo2(~n - 2);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#54#return; 1307#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 1319#fibo1FINAL assume true; 1318#fibo1EXIT >#50#return; 1188#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 1311#fibo2FINAL assume true; 1309#fibo2EXIT >#52#return; 1172#L15-1 [2020-11-30 00:05:46,178 INFO L796 eck$LassoCheckResult]: Loop: 1172#L15-1 call #t~ret8 := fibo2(~n - 2);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume !(~n < 1); 1169#L22 assume !(1 == ~n); 1174#L25 call #t~ret9 := fibo1(~n - 1);< 1300#fibo1ENTRY ~n := #in~n; 1298#L10 assume !(~n < 1); 1296#L12 assume !(1 == ~n); 1170#L15 call #t~ret7 := fibo2(~n - 1);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume !(~n < 1); 1169#L22 assume !(1 == ~n); 1174#L25 call #t~ret9 := fibo1(~n - 1);< 1300#fibo1ENTRY ~n := #in~n; 1298#L10 assume !(~n < 1); 1296#L12 assume !(1 == ~n); 1170#L15 call #t~ret7 := fibo2(~n - 1);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#52#return; 1172#L15-1 call #t~ret8 := fibo2(~n - 2);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#54#return; 1307#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 1319#fibo1FINAL assume true; 1318#fibo1EXIT >#48#return; 1186#L25-1 call #t~ret10 := fibo1(~n - 2);< 1300#fibo1ENTRY ~n := #in~n; 1298#L10 assume !(~n < 1); 1296#L12 assume !(1 == ~n); 1170#L15 call #t~ret7 := fibo2(~n - 1);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#52#return; 1172#L15-1 call #t~ret8 := fibo2(~n - 2);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#54#return; 1307#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 1319#fibo1FINAL assume true; 1318#fibo1EXIT >#50#return; 1188#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 1311#fibo2FINAL assume true; 1309#fibo2EXIT >#52#return; 1172#L15-1 [2020-11-30 00:05:46,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:05:46,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1380034771, now seen corresponding path program 1 times [2020-11-30 00:05:46,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:05:46,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632138575] [2020-11-30 00:05:46,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:05:46,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:46,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-30 00:05:46,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:46,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:05:46,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:46,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:05:46,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:46,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-30 00:05:46,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:46,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:05:46,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:46,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-30 00:05:46,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:46,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:05:46,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:46,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-30 00:05:46,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:46,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-11-30 00:05:46,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:46,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:05:46,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:46,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-30 00:05:46,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:46,415 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-11-30 00:05:46,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632138575] [2020-11-30 00:05:46,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312272089] [2020-11-30 00:05:46,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:05:46,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:46,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-30 00:05:46,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:05:46,838 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 17 proven. 91 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-11-30 00:05:46,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:05:46,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13] total 17 [2020-11-30 00:05:46,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896818294] [2020-11-30 00:05:46,842 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-30 00:05:46,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:05:46,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1411437133, now seen corresponding path program 1 times [2020-11-30 00:05:46,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:05:46,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039507689] [2020-11-30 00:05:46,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:05:46,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:46,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-30 00:05:46,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:46,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:05:46,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:46,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:05:46,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:46,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-30 00:05:46,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:46,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-30 00:05:46,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:47,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:05:47,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:47,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-30 00:05:47,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:47,025 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-11-30 00:05:47,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039507689] [2020-11-30 00:05:47,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593748234] [2020-11-30 00:05:47,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:05:47,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:47,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 00:05:47,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:05:47,294 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-11-30 00:05:47,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:05:47,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 12 [2020-11-30 00:05:47,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899776893] [2020-11-30 00:05:47,296 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-30 00:05:47,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:05:47,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-30 00:05:47,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-11-30 00:05:47,297 INFO L87 Difference]: Start difference. First operand 167 states and 225 transitions. cyclomatic complexity: 63 Second operand 12 states. [2020-11-30 00:05:47,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:05:47,640 INFO L93 Difference]: Finished difference Result 223 states and 293 transitions. [2020-11-30 00:05:47,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-30 00:05:47,641 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 223 states and 293 transitions. [2020-11-30 00:05:47,648 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-11-30 00:05:47,655 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 223 states to 200 states and 262 transitions. [2020-11-30 00:05:47,655 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 134 [2020-11-30 00:05:47,655 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 134 [2020-11-30 00:05:47,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 200 states and 262 transitions. [2020-11-30 00:05:47,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:05:47,657 INFO L691 BuchiCegarLoop]: Abstraction has 200 states and 262 transitions. [2020-11-30 00:05:47,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states and 262 transitions. [2020-11-30 00:05:47,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 184. [2020-11-30 00:05:47,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-11-30 00:05:47,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 238 transitions. [2020-11-30 00:05:47,679 INFO L714 BuchiCegarLoop]: Abstraction has 184 states and 238 transitions. [2020-11-30 00:05:47,679 INFO L594 BuchiCegarLoop]: Abstraction has 184 states and 238 transitions. [2020-11-30 00:05:47,679 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-11-30 00:05:47,680 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 184 states and 238 transitions. [2020-11-30 00:05:47,682 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-11-30 00:05:47,683 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:05:47,683 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:05:47,684 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:05:47,685 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:05:47,685 INFO L794 eck$LassoCheckResult]: Stem: 2329#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 2319#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 2301#L39 call main_#t~ret11 := fibo1(main_~x~0);< 2302#fibo1ENTRY ~n := #in~n; 2364#L10 assume !(~n < 1); 2318#L12 assume !(1 == ~n); 2282#L15 call #t~ret7 := fibo2(~n - 1);< 2322#fibo2ENTRY ~n := #in~n; 2413#L20 assume !(~n < 1); 2281#L22 assume !(1 == ~n); 2283#L25 call #t~ret9 := fibo1(~n - 1);< 2311#fibo1ENTRY ~n := #in~n; 2350#L10 assume !(~n < 1); 2348#L12 assume !(1 == ~n); 2265#L15 call #t~ret7 := fibo2(~n - 1);< 2344#fibo2ENTRY ~n := #in~n; 2367#L20 assume !(~n < 1); 2366#L22 assume !(1 == ~n); 2336#L25 call #t~ret9 := fibo1(~n - 1);< 2311#fibo1ENTRY ~n := #in~n; 2353#L10 assume !(~n < 1); 2377#L12 assume 1 == ~n;#res := 1; 2378#fibo1FINAL assume true; 2444#fibo1EXIT >#48#return; 2291#L25-1 call #t~ret10 := fibo1(~n - 2);< 2314#fibo1ENTRY ~n := #in~n; 2290#L10 assume ~n < 1;#res := 0; 2292#fibo1FINAL assume true; 2447#fibo1EXIT >#50#return; 2264#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 2267#fibo2FINAL assume true; 2387#fibo2EXIT >#52#return; 2286#L15-1 [2020-11-30 00:05:47,685 INFO L796 eck$LassoCheckResult]: Loop: 2286#L15-1 call #t~ret8 := fibo2(~n - 2);< 2335#fibo2ENTRY ~n := #in~n; 2414#L20 assume !(~n < 1); 2415#L22 assume !(1 == ~n); 2394#L25 call #t~ret9 := fibo1(~n - 1);< 2403#fibo1ENTRY ~n := #in~n; 2408#L10 assume !(~n < 1); 2406#L12 assume !(1 == ~n); 2287#L15 call #t~ret7 := fibo2(~n - 1);< 2335#fibo2ENTRY ~n := #in~n; 2414#L20 assume !(~n < 1); 2415#L22 assume 1 == ~n;#res := 1; 2284#fibo2FINAL assume true; 2288#fibo2EXIT >#52#return; 2286#L15-1 [2020-11-30 00:05:47,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:05:47,686 INFO L82 PathProgramCache]: Analyzing trace with hash -658151768, now seen corresponding path program 1 times [2020-11-30 00:05:47,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:05:47,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402518217] [2020-11-30 00:05:47,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:05:47,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:47,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-30 00:05:47,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:47,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:05:47,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:47,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-30 00:05:47,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:47,909 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 00:05:47,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402518217] [2020-11-30 00:05:47,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910017466] [2020-11-30 00:05:47,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:05:47,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:47,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-30 00:05:47,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:05:48,032 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 00:05:48,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:05:48,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-11-30 00:05:48,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684104605] [2020-11-30 00:05:48,034 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-30 00:05:48,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:05:48,035 INFO L82 PathProgramCache]: Analyzing trace with hash -815837104, now seen corresponding path program 1 times [2020-11-30 00:05:48,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:05:48,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456914709] [2020-11-30 00:05:48,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:05:48,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:05:48,039 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:05:48,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:05:48,043 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:05:48,045 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:05:48,257 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:05:48,257 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:05:48,257 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:05:48,257 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:05:48,257 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-30 00:05:48,258 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:48,258 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:05:48,258 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:05:48,258 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration5_Loop [2020-11-30 00:05:48,258 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:05:48,258 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:05:48,262 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:48,267 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:48,270 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:48,273 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:48,276 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:48,280 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:48,289 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:48,292 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:48,300 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:48,391 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:05:48,391 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/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 [2020-11-30 00:05:48,396 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:05:48,396 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:05:48,399 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:05:48,399 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret9=0} Honda state: {fibo2_#t~ret9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/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 [2020-11-30 00:05:48,426 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:05:48,426 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:05:48,429 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:05:48,429 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#in~n=0} Honda state: {fibo2_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:48,457 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:05:48,457 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:05:48,460 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:05:48,460 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret7=1} Honda state: {fibo1_#t~ret7=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/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 [2020-11-30 00:05:48,487 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:05:48,487 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:05:48,490 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:05:48,490 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/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 [2020-11-30 00:05:48,517 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:05:48,517 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:05:48,520 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:05:48,520 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/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 [2020-11-30 00:05:48,561 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:05:48,561 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:48,590 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-30 00:05:48,590 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:05:49,386 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-30 00:05:49,388 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:05:49,389 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:05:49,389 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:05:49,389 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:05:49,389 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-30 00:05:49,389 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:49,389 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:05:49,389 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:05:49,389 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration5_Loop [2020-11-30 00:05:49,389 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:05:49,389 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:05:49,390 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:49,395 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:49,398 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:49,406 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:49,410 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:49,414 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:49,417 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:49,420 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:49,429 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:49,500 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:05:49,500 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 44 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 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:49,504 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 [2020-11-30 00:05:49,506 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:05:49,506 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:05:49,506 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:05:49,506 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:05:49,506 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:05:49,507 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:05:49,507 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:05:49,510 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/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) Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:49,538 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 [2020-11-30 00:05:49,540 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:05:49,540 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:05:49,540 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:05:49,540 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:05:49,540 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:05:49,541 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:05:49,541 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:05:49,542 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/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) Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:49,570 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 [2020-11-30 00:05:49,571 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:05:49,572 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:05:49,572 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:05:49,572 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:05:49,572 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:05:49,573 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:05:49,573 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:05:49,574 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/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) Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:49,604 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 [2020-11-30 00:05:49,605 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:05:49,605 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:05:49,606 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:05:49,606 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:05:49,606 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:05:49,606 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:05:49,607 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:05:49,621 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/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) Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:49,659 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 [2020-11-30 00:05:49,661 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:05:49,661 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:05:49,661 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:05:49,661 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:05:49,661 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:05:49,662 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:05:49,662 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:05:49,680 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/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) Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:49,707 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 [2020-11-30 00:05:49,709 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:05:49,709 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:05:49,710 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:05:49,710 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:05:49,710 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:05:49,711 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:05:49,711 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:05:49,717 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/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 [2020-11-30 00:05:49,744 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 [2020-11-30 00:05:49,745 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:05:49,745 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:05:49,745 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:05:49,746 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:05:49,746 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:05:49,746 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:05:49,746 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:05:49,748 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/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 [2020-11-30 00:05:49,775 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 [2020-11-30 00:05:49,777 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:05:49,777 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:05:49,777 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:05:49,777 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:05:49,777 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:05:49,779 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:05:49,780 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:05:49,793 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-30 00:05:49,796 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-30 00:05:49,797 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_2ee37174-17ef-4f6f-b7be-15d2e81d1881/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) [2020-11-30 00:05:49,807 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-30 00:05:49,808 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-30 00:05:49,808 INFO L510 LassoAnalysis]: Proved termination. [2020-11-30 00:05:49,808 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:49,852 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-30 00:05:49,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:05:49,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:49,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-30 00:05:49,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:05:50,006 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:05:50,020 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:05:50,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:50,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-30 00:05:50,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:05:50,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:05:50,235 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 8 loop predicates [2020-11-30 00:05:50,235 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 184 states and 238 transitions. cyclomatic complexity: 59 Second operand 10 states. [2020-11-30 00:05:51,021 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 184 states and 238 transitions. cyclomatic complexity: 59. Second operand 10 states. Result 717 states and 936 transitions. Complement of second has 40 states. [2020-11-30 00:05:51,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 2 stem states 9 non-accepting loop states 1 accepting loop states [2020-11-30 00:05:51,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-30 00:05:51,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 69 transitions. [2020-11-30 00:05:51,027 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 69 transitions. Stem has 32 letters. Loop has 14 letters. [2020-11-30 00:05:51,028 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:05:51,028 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 69 transitions. Stem has 46 letters. Loop has 14 letters. [2020-11-30 00:05:51,029 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:05:51,029 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 69 transitions. Stem has 32 letters. Loop has 28 letters. [2020-11-30 00:05:51,030 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:05:51,031 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 717 states and 936 transitions. [2020-11-30 00:05:51,057 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 40 [2020-11-30 00:05:51,089 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 717 states to 646 states and 859 transitions. [2020-11-30 00:05:51,089 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 301 [2020-11-30 00:05:51,095 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 308 [2020-11-30 00:05:51,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 646 states and 859 transitions. [2020-11-30 00:05:51,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:05:51,103 INFO L691 BuchiCegarLoop]: Abstraction has 646 states and 859 transitions. [2020-11-30 00:05:51,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states and 859 transitions. [2020-11-30 00:05:51,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 625. [2020-11-30 00:05:51,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2020-11-30 00:05:51,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 829 transitions. [2020-11-30 00:05:51,190 INFO L714 BuchiCegarLoop]: Abstraction has 625 states and 829 transitions. [2020-11-30 00:05:51,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:05:51,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-30 00:05:51,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-11-30 00:05:51,192 INFO L87 Difference]: Start difference. First operand 625 states and 829 transitions. Second operand 15 states. [2020-11-30 00:05:51,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:05:51,737 INFO L93 Difference]: Finished difference Result 677 states and 901 transitions. [2020-11-30 00:05:51,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-30 00:05:51,738 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 677 states and 901 transitions. [2020-11-30 00:05:51,752 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 40 [2020-11-30 00:05:51,768 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 677 states to 674 states and 897 transitions. [2020-11-30 00:05:51,769 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 322 [2020-11-30 00:05:51,770 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 322 [2020-11-30 00:05:51,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 674 states and 897 transitions. [2020-11-30 00:05:51,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:05:51,772 INFO L691 BuchiCegarLoop]: Abstraction has 674 states and 897 transitions. [2020-11-30 00:05:51,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states and 897 transitions. [2020-11-30 00:05:51,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 635. [2020-11-30 00:05:51,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 635 states. [2020-11-30 00:05:51,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 838 transitions. [2020-11-30 00:05:51,826 INFO L714 BuchiCegarLoop]: Abstraction has 635 states and 838 transitions. [2020-11-30 00:05:51,827 INFO L594 BuchiCegarLoop]: Abstraction has 635 states and 838 transitions. [2020-11-30 00:05:51,827 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-11-30 00:05:51,827 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 635 states and 838 transitions. [2020-11-30 00:05:51,834 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 40 [2020-11-30 00:05:51,834 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:05:51,835 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:05:51,842 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:05:51,842 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:05:51,845 INFO L794 eck$LassoCheckResult]: Stem: 4883#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 4882#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 4854#L39 call main_#t~ret11 := fibo1(main_~x~0);< 4855#fibo1ENTRY ~n := #in~n; 5175#L10 assume !(~n < 1); 5174#L12 assume !(1 == ~n); 4899#L15 call #t~ret7 := fibo2(~n - 1);< 5170#fibo2ENTRY ~n := #in~n; 5159#L20 assume !(~n < 1); 5157#L22 assume !(1 == ~n); 5144#L25 call #t~ret9 := fibo1(~n - 1);< 5154#fibo1ENTRY ~n := #in~n; 5152#L10 assume !(~n < 1); 5149#L12 assume !(1 == ~n); 4924#L15 call #t~ret7 := fibo2(~n - 1);< 5015#fibo2ENTRY ~n := #in~n; 5138#L20 assume !(~n < 1); 5066#L22 assume !(1 == ~n); 4862#L25 call #t~ret9 := fibo1(~n - 1);< 5032#fibo1ENTRY ~n := #in~n; 5033#L10 assume !(~n < 1); 5118#L12 assume !(1 == ~n); 4999#L15 call #t~ret7 := fibo2(~n - 1);< 5004#fibo2ENTRY ~n := #in~n; 4998#L20 assume !(~n < 1); 5000#L22 assume 1 == ~n;#res := 1; 5369#fibo2FINAL assume true; 5367#fibo2EXIT >#52#return; 4985#L15-1 call #t~ret8 := fibo2(~n - 2);< 4995#fibo2ENTRY ~n := #in~n; 4990#L20 assume ~n < 1;#res := 0; 4984#fibo2FINAL assume true; 4986#fibo2EXIT >#54#return; 4978#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 4979#fibo1FINAL assume true; 4943#fibo1EXIT >#48#return; 4915#L25-1 call #t~ret10 := fibo1(~n - 2);< 4926#fibo1ENTRY ~n := #in~n; 5451#L10 assume ~n < 1;#res := 0; 5450#fibo1FINAL assume true; 5446#fibo1EXIT >#50#return; 5432#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 5428#fibo2FINAL assume true; 5426#fibo2EXIT >#52#return; 4868#L15-1 call #t~ret8 := fibo2(~n - 2);< 4889#fibo2ENTRY [2020-11-30 00:05:51,845 INFO L796 eck$LassoCheckResult]: Loop: 4889#fibo2ENTRY ~n := #in~n; 4948#L20 assume !(~n < 1); 4904#L22 assume !(1 == ~n); 4867#L25 call #t~ret9 := fibo1(~n - 1);< 4872#fibo1ENTRY ~n := #in~n; 5385#L10 assume !(~n < 1); 5383#L12 assume !(1 == ~n); 4870#L15 call #t~ret7 := fibo2(~n - 1);< 4889#fibo2ENTRY [2020-11-30 00:05:51,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:05:51,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1560322136, now seen corresponding path program 1 times [2020-11-30 00:05:51,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:05:51,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515314884] [2020-11-30 00:05:51,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:05:51,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:51,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-30 00:05:51,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:51,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:05:51,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:51,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:05:51,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:51,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-30 00:05:52,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:52,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-11-30 00:05:52,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:52,031 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-11-30 00:05:52,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515314884] [2020-11-30 00:05:52,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644788911] [2020-11-30 00:05:52,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:05:52,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:52,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-30 00:05:52,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:05:52,377 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-30 00:05:52,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:05:52,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 14] total 19 [2020-11-30 00:05:52,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953606856] [2020-11-30 00:05:52,379 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-30 00:05:52,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:05:52,379 INFO L82 PathProgramCache]: Analyzing trace with hash 996300776, now seen corresponding path program 2 times [2020-11-30 00:05:52,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:05:52,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585490666] [2020-11-30 00:05:52,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:05:52,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:05:52,382 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:05:52,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:05:52,388 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:05:52,395 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:05:52,553 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:05:52,553 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:05:52,553 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:05:52,553 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:05:52,553 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-30 00:05:52,554 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:52,554 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:05:52,554 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:05:52,554 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration6_Loop [2020-11-30 00:05:52,554 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:05:52,554 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:05:52,555 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:52,562 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:52,565 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:52,581 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:52,590 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:52,593 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:52,596 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:52,599 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:52,608 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:52,617 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:52,707 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:05:52,707 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/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) [2020-11-30 00:05:52,722 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:05:52,722 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:52,726 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:05:52,727 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret8=0} Honda state: {fibo1_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 55 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 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:52,760 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:05:52,761 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:05:52,763 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:05:52,763 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#in~n=0} Honda state: {fibo1_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/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 [2020-11-30 00:05:52,790 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:05:52,790 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:05:52,793 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:05:52,793 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/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 [2020-11-30 00:05:52,821 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:05:52,821 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:05:52,824 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:05:52,824 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/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 [2020-11-30 00:05:52,852 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:05:52,853 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:05:52,855 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:05:52,855 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_~n=0} Honda state: {fibo2_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/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 [2020-11-30 00:05:52,883 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:05:52,883 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:05:52,886 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:05:52,886 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/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 [2020-11-30 00:05:52,913 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:05:52,913 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:05:52,915 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:05:52,915 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret10=0} Honda state: {fibo2_#t~ret10=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/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 [2020-11-30 00:05:52,944 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:05:52,944 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:05:52,947 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:05:52,947 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret9=0} Honda state: {fibo2_#t~ret9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/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 [2020-11-30 00:05:52,975 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:05:52,975 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 63 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 63 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:53,006 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-30 00:05:53,006 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:05:53,070 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-30 00:05:53,071 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:05:53,072 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:05:53,072 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:05:53,072 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:05:53,072 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-30 00:05:53,072 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:53,072 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:05:53,072 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:05:53,072 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration6_Loop [2020-11-30 00:05:53,072 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:05:53,072 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:05:53,073 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:53,087 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:53,094 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:53,097 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:53,099 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:53,102 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:53,105 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:53,107 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:53,110 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:53,113 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:53,180 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:05:53,180 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 64 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 64 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:53,185 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 [2020-11-30 00:05:53,186 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:05:53,186 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:05:53,186 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:05:53,186 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:05:53,186 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:05:53,187 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:05:53,187 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:05:53,188 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 65 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 65 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:53,210 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 [2020-11-30 00:05:53,211 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:05:53,211 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:05:53,211 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:05:53,211 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:05:53,212 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:05:53,212 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:05:53,212 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:05:53,213 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 66 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 66 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:53,236 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 [2020-11-30 00:05:53,237 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:05:53,237 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:05:53,237 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:05:53,237 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:05:53,237 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:05:53,238 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:05:53,238 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:05:53,247 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 67 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 67 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:53,270 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 [2020-11-30 00:05:53,271 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:05:53,271 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:05:53,272 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:05:53,272 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:05:53,272 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:05:53,272 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:05:53,272 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:05:53,273 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:05:53,298 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 [2020-11-30 00:05:53,300 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:05:53,300 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:05:53,300 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:05:53,300 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:05:53,300 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:05:53,302 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:05:53,302 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:53,304 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 69 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 69 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:53,329 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 [2020-11-30 00:05:53,330 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:05:53,330 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:05:53,331 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:05:53,331 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:05:53,331 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:05:53,331 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:05:53,331 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:05:53,333 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 70 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 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:53,357 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 [2020-11-30 00:05:53,359 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:05:53,359 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:05:53,359 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:05:53,359 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:05:53,359 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:05:53,360 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:05:53,360 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:05:53,361 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 71 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 71 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:53,391 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 [2020-11-30 00:05:53,392 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:05:53,392 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:05:53,392 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:05:53,392 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:05:53,392 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:05:53,393 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:05:53,393 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:05:53,394 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 72 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 72 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:53,420 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 [2020-11-30 00:05:53,422 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:05:53,422 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:05:53,422 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:05:53,422 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:05:53,422 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:05:53,423 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:05:53,423 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:05:53,424 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 73 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 73 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:53,450 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 [2020-11-30 00:05:53,451 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:05:53,451 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:05:53,451 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:05:53,451 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:05:53,451 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:05:53,452 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:05:53,452 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:05:53,454 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-30 00:05:53,456 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-30 00:05:53,456 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 74 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 74 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:53,458 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-30 00:05:53,459 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-30 00:05:53,459 INFO L510 LassoAnalysis]: Proved termination. [2020-11-30 00:05:53,459 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_#in~n) = 1*fibo2_#in~n Supporting invariants [] [2020-11-30 00:05:53,481 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-30 00:05:53,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:05:53,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:53,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-30 00:05:53,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:05:53,601 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:05:53,604 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:05:53,607 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:05:53,611 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:05:53,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:53,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 00:05:53,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:05:53,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:05:53,773 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 [2020-11-30 00:05:53,773 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 635 states and 838 transitions. cyclomatic complexity: 220 Second operand 7 states. [2020-11-30 00:05:54,078 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 635 states and 838 transitions. cyclomatic complexity: 220. Second operand 7 states. Result 947 states and 1222 transitions. Complement of second has 24 states. [2020-11-30 00:05:54,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2020-11-30 00:05:54,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-30 00:05:54,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 39 transitions. [2020-11-30 00:05:54,081 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 39 transitions. Stem has 45 letters. Loop has 8 letters. [2020-11-30 00:05:54,083 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:05:54,083 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-30 00:05:54,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:05:54,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:54,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-30 00:05:54,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:05:54,243 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:05:54,253 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:05:54,259 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:05:54,266 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:05:54,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:54,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 00:05:54,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:05:54,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:05:54,360 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 5 loop predicates [2020-11-30 00:05:54,360 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 635 states and 838 transitions. cyclomatic complexity: 220 Second operand 7 states. [2020-11-30 00:05:54,631 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 635 states and 838 transitions. cyclomatic complexity: 220. Second operand 7 states. Result 947 states and 1222 transitions. Complement of second has 24 states. [2020-11-30 00:05:54,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2020-11-30 00:05:54,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-30 00:05:54,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 39 transitions. [2020-11-30 00:05:54,633 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 39 transitions. Stem has 45 letters. Loop has 8 letters. [2020-11-30 00:05:54,633 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:05:54,633 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-30 00:05:54,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:05:54,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:54,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-30 00:05:54,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:05:54,777 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:05:54,782 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:05:54,784 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:05:54,787 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:05:54,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:54,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 00:05:54,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:05:54,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:05:54,907 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 5 loop predicates [2020-11-30 00:05:54,907 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 635 states and 838 transitions. cyclomatic complexity: 220 Second operand 7 states. [2020-11-30 00:05:55,173 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 635 states and 838 transitions. cyclomatic complexity: 220. Second operand 7 states. Result 1303 states and 1629 transitions. Complement of second has 23 states. [2020-11-30 00:05:55,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2020-11-30 00:05:55,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-30 00:05:55,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 43 transitions. [2020-11-30 00:05:55,175 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 45 letters. Loop has 8 letters. [2020-11-30 00:05:55,175 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:05:55,176 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 53 letters. Loop has 8 letters. [2020-11-30 00:05:55,176 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:05:55,176 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 45 letters. Loop has 16 letters. [2020-11-30 00:05:55,177 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:05:55,177 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1303 states and 1629 transitions. [2020-11-30 00:05:55,198 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 88 [2020-11-30 00:05:55,215 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1303 states to 988 states and 1292 transitions. [2020-11-30 00:05:55,216 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 381 [2020-11-30 00:05:55,217 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 427 [2020-11-30 00:05:55,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 988 states and 1292 transitions. [2020-11-30 00:05:55,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:05:55,218 INFO L691 BuchiCegarLoop]: Abstraction has 988 states and 1292 transitions. [2020-11-30 00:05:55,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states and 1292 transitions. [2020-11-30 00:05:55,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 899. [2020-11-30 00:05:55,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 899 states. [2020-11-30 00:05:55,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1160 transitions. [2020-11-30 00:05:55,262 INFO L714 BuchiCegarLoop]: Abstraction has 899 states and 1160 transitions. [2020-11-30 00:05:55,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:05:55,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-30 00:05:55,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2020-11-30 00:05:55,269 INFO L87 Difference]: Start difference. First operand 899 states and 1160 transitions. Second operand 19 states. [2020-11-30 00:05:56,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:05:56,277 INFO L93 Difference]: Finished difference Result 1253 states and 1799 transitions. [2020-11-30 00:05:56,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-30 00:05:56,278 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1253 states and 1799 transitions. [2020-11-30 00:05:56,300 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 104 [2020-11-30 00:05:56,324 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1253 states to 1247 states and 1793 transitions. [2020-11-30 00:05:56,325 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 546 [2020-11-30 00:05:56,326 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 546 [2020-11-30 00:05:56,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1247 states and 1793 transitions. [2020-11-30 00:05:56,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:05:56,327 INFO L691 BuchiCegarLoop]: Abstraction has 1247 states and 1793 transitions. [2020-11-30 00:05:56,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states and 1793 transitions. [2020-11-30 00:05:56,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 1103. [2020-11-30 00:05:56,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1103 states. [2020-11-30 00:05:56,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1503 transitions. [2020-11-30 00:05:56,380 INFO L714 BuchiCegarLoop]: Abstraction has 1103 states and 1503 transitions. [2020-11-30 00:05:56,381 INFO L594 BuchiCegarLoop]: Abstraction has 1103 states and 1503 transitions. [2020-11-30 00:05:56,381 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-11-30 00:05:56,381 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 1103 states and 1503 transitions. [2020-11-30 00:05:56,391 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 101 [2020-11-30 00:05:56,391 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:05:56,391 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:05:56,393 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:05:56,393 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:05:56,394 INFO L794 eck$LassoCheckResult]: Stem: 11730#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 11729#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 11692#L39 call main_#t~ret11 := fibo1(main_~x~0);< 11693#fibo1ENTRY ~n := #in~n; 11814#L10 assume !(~n < 1); 11813#L12 assume !(1 == ~n); 11809#L15 call #t~ret7 := fibo2(~n - 1);< 11812#fibo2ENTRY ~n := #in~n; 11811#L20 assume !(~n < 1); 11810#L22 assume !(1 == ~n); 11805#L25 call #t~ret9 := fibo1(~n - 1);< 11808#fibo1ENTRY ~n := #in~n; 11807#L10 assume !(~n < 1); 11806#L12 assume !(1 == ~n); 11784#L15 call #t~ret7 := fibo2(~n - 1);< 11786#fibo2ENTRY ~n := #in~n; 11804#L20 assume !(~n < 1); 11800#L22 assume !(1 == ~n); 11781#L25 call #t~ret9 := fibo1(~n - 1);< 11794#fibo1ENTRY ~n := #in~n; 11795#L10 assume !(~n < 1); 11802#L12 assume !(1 == ~n); 11803#L15 call #t~ret7 := fibo2(~n - 1);< 12322#fibo2ENTRY ~n := #in~n; 12330#L20 assume !(~n < 1); 12327#L22 assume 1 == ~n;#res := 1; 12326#fibo2FINAL assume true; 12321#fibo2EXIT >#52#return; 12316#L15-1 call #t~ret8 := fibo2(~n - 2);< 12317#fibo2ENTRY ~n := #in~n; 12343#L20 assume ~n < 1;#res := 0; 12342#fibo2FINAL assume true; 12315#fibo2EXIT >#54#return; 12310#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 12307#fibo1FINAL assume true; 12304#fibo1EXIT >#48#return; 12290#L25-1 call #t~ret10 := fibo1(~n - 2);< 12294#fibo1ENTRY ~n := #in~n; 12295#L10 assume !(~n < 1); 12287#L12 assume !(1 == ~n); 11683#L15 call #t~ret7 := fibo2(~n - 1);< 12278#fibo2ENTRY ~n := #in~n; 12279#L20 assume !(~n < 1); 12264#L22 assume 1 == ~n;#res := 1; 12265#fibo2FINAL assume true; 12670#fibo2EXIT >#52#return; 11714#L15-1 [2020-11-30 00:05:56,394 INFO L796 eck$LassoCheckResult]: Loop: 11714#L15-1 call #t~ret8 := fibo2(~n - 2);< 12362#fibo2ENTRY ~n := #in~n; 11766#L20 assume !(~n < 1); 11767#L22 assume !(1 == ~n); 11713#L25 call #t~ret9 := fibo1(~n - 1);< 11715#fibo1ENTRY ~n := #in~n; 12297#L10 assume !(~n < 1); 12298#L12 assume !(1 == ~n); 11743#L15 call #t~ret7 := fibo2(~n - 1);< 11745#fibo2ENTRY ~n := #in~n; 11751#L20 assume !(~n < 1); 12722#L22 assume 1 == ~n;#res := 1; 12720#fibo2FINAL assume true; 12676#fibo2EXIT >#52#return; 11714#L15-1 [2020-11-30 00:05:56,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:05:56,394 INFO L82 PathProgramCache]: Analyzing trace with hash -663651953, now seen corresponding path program 1 times [2020-11-30 00:05:56,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:05:56,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725129885] [2020-11-30 00:05:56,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:05:56,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:56,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-30 00:05:56,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:56,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:05:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:56,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-30 00:05:56,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:56,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-11-30 00:05:56,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:56,619 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-30 00:05:56,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725129885] [2020-11-30 00:05:56,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790942113] [2020-11-30 00:05:56,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:05:56,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:56,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-30 00:05:56,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:05:56,769 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 27 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 00:05:56,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:05:56,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-11-30 00:05:56,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921080741] [2020-11-30 00:05:56,771 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-30 00:05:56,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:05:56,771 INFO L82 PathProgramCache]: Analyzing trace with hash -815837104, now seen corresponding path program 2 times [2020-11-30 00:05:56,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:05:56,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002168684] [2020-11-30 00:05:56,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:05:56,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:05:56,777 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:05:56,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:05:56,781 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:05:56,783 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:05:56,987 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:05:56,987 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:05:56,987 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:05:56,987 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:05:56,987 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-30 00:05:56,987 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:56,987 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:05:56,988 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:05:56,988 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration7_Loop [2020-11-30 00:05:56,988 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:05:56,988 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:05:56,989 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:56,991 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:56,994 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:56,998 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:57,001 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:57,004 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:57,018 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:57,053 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:57,056 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:57,120 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:05:57,121 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 76 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 76 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:57,123 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:05:57,123 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:05:57,125 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:05:57,125 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#in~n=0} Honda state: {fibo2_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 77 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 77 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:57,147 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:05:57,147 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:05:57,149 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:05:57,149 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 78 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 78 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:57,171 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:05:57,172 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:05:57,181 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:05:57,181 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret9=0} Honda state: {fibo2_#t~ret9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 79 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 79 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:57,212 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:05:57,212 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:05:57,214 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:05:57,214 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 80 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 80 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:57,237 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:05:57,237 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:05:57,239 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:05:57,239 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret10=0} Honda state: {fibo2_#t~ret10=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 81 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 81 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:57,260 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:05:57,261 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:05:57,263 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:05:57,263 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_~n=0} Honda state: {fibo2_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 82 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 82 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:57,284 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:05:57,285 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 83 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 83 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:57,310 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-30 00:05:57,310 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:05:58,428 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-30 00:05:58,430 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:05:58,430 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:05:58,430 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:05:58,430 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:05:58,430 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-30 00:05:58,430 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:58,430 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:05:58,430 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:05:58,430 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration7_Loop [2020-11-30 00:05:58,430 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:05:58,431 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:05:58,431 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:58,436 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:58,439 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:58,442 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:58,444 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:58,447 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:58,455 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:58,458 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:58,460 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:05:58,529 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:05:58,530 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 84 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 84 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:58,532 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 [2020-11-30 00:05:58,533 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:05:58,533 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:05:58,534 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:05:58,534 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:05:58,534 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:05:58,535 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:05:58,535 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:05:58,536 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 85 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 85 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:58,561 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 [2020-11-30 00:05:58,562 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:05:58,562 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:05:58,563 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:05:58,563 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:05:58,563 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:05:58,563 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:05:58,563 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:05:58,564 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 86 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 86 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:58,590 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 [2020-11-30 00:05:58,591 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:05:58,591 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:05:58,591 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:05:58,591 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:05:58,591 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:05:58,592 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:05:58,592 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:05:58,593 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 87 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 87 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:58,618 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 [2020-11-30 00:05:58,619 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:05:58,619 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:05:58,619 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:05:58,619 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:05:58,619 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:05:58,620 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:05:58,620 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:05:58,621 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 88 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 88 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:58,645 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 [2020-11-30 00:05:58,646 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:05:58,647 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:05:58,647 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:05:58,647 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:05:58,647 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:05:58,648 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:05:58,648 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:05:58,649 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 89 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 89 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:58,674 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 [2020-11-30 00:05:58,676 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:05:58,676 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:05:58,676 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:05:58,676 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:05:58,676 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:05:58,677 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:05:58,677 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:05:58,680 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-30 00:05:58,684 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-30 00:05:58,685 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_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 90 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 90 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:05:58,687 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-30 00:05:58,687 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-30 00:05:58,687 INFO L510 LassoAnalysis]: Proved termination. [2020-11-30 00:05:58,687 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] [2020-11-30 00:05:58,709 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-30 00:05:58,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:05:58,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:58,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-30 00:05:58,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:05:58,837 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:05:58,840 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:05:58,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:58,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-30 00:05:58,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:05:59,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:05:59,063 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 8 loop predicates [2020-11-30 00:05:59,063 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 1103 states and 1503 transitions. cyclomatic complexity: 417 Second operand 10 states. [2020-11-30 00:05:59,685 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 1103 states and 1503 transitions. cyclomatic complexity: 417. Second operand 10 states. Result 1956 states and 2660 transitions. Complement of second has 40 states. [2020-11-30 00:05:59,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 2 stem states 9 non-accepting loop states 1 accepting loop states [2020-11-30 00:05:59,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-30 00:05:59,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 67 transitions. [2020-11-30 00:05:59,689 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 67 transitions. Stem has 46 letters. Loop has 14 letters. [2020-11-30 00:05:59,689 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:05:59,689 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-30 00:05:59,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:05:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:59,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-30 00:05:59,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:05:59,829 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:05:59,832 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:05:59,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:05:59,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-30 00:05:59,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:06:00,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:06:00,001 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 8 loop predicates [2020-11-30 00:06:00,001 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 1103 states and 1503 transitions. cyclomatic complexity: 417 Second operand 10 states. [2020-11-30 00:06:00,492 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 1103 states and 1503 transitions. cyclomatic complexity: 417. Second operand 10 states. Result 1734 states and 2285 transitions. Complement of second has 26 states. [2020-11-30 00:06:00,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2020-11-30 00:06:00,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-30 00:06:00,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 46 transitions. [2020-11-30 00:06:00,494 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 46 transitions. Stem has 46 letters. Loop has 14 letters. [2020-11-30 00:06:00,494 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:06:00,494 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-30 00:06:00,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:06:00,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:00,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-30 00:06:00,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:06:00,618 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:06:00,620 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:06:00,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:00,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-30 00:06:00,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:06:00,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:06:00,801 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 8 loop predicates [2020-11-30 00:06:00,801 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 1103 states and 1503 transitions. cyclomatic complexity: 417 Second operand 10 states. [2020-11-30 00:06:01,468 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 1103 states and 1503 transitions. cyclomatic complexity: 417. Second operand 10 states. Result 5452 states and 7496 transitions. Complement of second has 124 states. [2020-11-30 00:06:01,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 2 stem states 9 non-accepting loop states 1 accepting loop states [2020-11-30 00:06:01,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-30 00:06:01,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 72 transitions. [2020-11-30 00:06:01,470 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 72 transitions. Stem has 46 letters. Loop has 14 letters. [2020-11-30 00:06:01,470 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:06:01,470 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 72 transitions. Stem has 60 letters. Loop has 14 letters. [2020-11-30 00:06:01,471 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:06:01,471 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 72 transitions. Stem has 46 letters. Loop has 28 letters. [2020-11-30 00:06:01,472 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:06:01,472 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 5452 states and 7496 transitions. [2020-11-30 00:06:01,541 INFO L131 ngComponentsAnalysis]: Automaton has 6 accepting balls. 243 [2020-11-30 00:06:01,588 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 5452 states to 2913 states and 4140 transitions. [2020-11-30 00:06:01,588 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 787 [2020-11-30 00:06:01,591 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 929 [2020-11-30 00:06:01,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2913 states and 4140 transitions. [2020-11-30 00:06:01,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:06:01,591 INFO L691 BuchiCegarLoop]: Abstraction has 2913 states and 4140 transitions. [2020-11-30 00:06:01,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2913 states and 4140 transitions. [2020-11-30 00:06:01,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2913 to 2461. [2020-11-30 00:06:01,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2461 states. [2020-11-30 00:06:01,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2461 states to 2461 states and 3426 transitions. [2020-11-30 00:06:01,703 INFO L714 BuchiCegarLoop]: Abstraction has 2461 states and 3426 transitions. [2020-11-30 00:06:01,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:06:01,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-30 00:06:01,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-11-30 00:06:01,704 INFO L87 Difference]: Start difference. First operand 2461 states and 3426 transitions. Second operand 17 states. [2020-11-30 00:06:02,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:06:02,381 INFO L93 Difference]: Finished difference Result 3452 states and 5090 transitions. [2020-11-30 00:06:02,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-30 00:06:02,381 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 3452 states and 5090 transitions. [2020-11-30 00:06:02,430 INFO L131 ngComponentsAnalysis]: Automaton has 11 accepting balls. 341 [2020-11-30 00:06:02,485 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 3452 states to 3449 states and 5086 transitions. [2020-11-30 00:06:02,485 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 1086 [2020-11-30 00:06:02,488 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 1086 [2020-11-30 00:06:02,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3449 states and 5086 transitions. [2020-11-30 00:06:02,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:06:02,488 INFO L691 BuchiCegarLoop]: Abstraction has 3449 states and 5086 transitions. [2020-11-30 00:06:02,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3449 states and 5086 transitions. [2020-11-30 00:06:02,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3449 to 3231. [2020-11-30 00:06:02,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3231 states. [2020-11-30 00:06:02,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3231 states to 3231 states and 4807 transitions. [2020-11-30 00:06:02,616 INFO L714 BuchiCegarLoop]: Abstraction has 3231 states and 4807 transitions. [2020-11-30 00:06:02,616 INFO L594 BuchiCegarLoop]: Abstraction has 3231 states and 4807 transitions. [2020-11-30 00:06:02,616 INFO L427 BuchiCegarLoop]: ======== Iteration 8============ [2020-11-30 00:06:02,616 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 3231 states and 4807 transitions. [2020-11-30 00:06:02,644 INFO L131 ngComponentsAnalysis]: Automaton has 11 accepting balls. 340 [2020-11-30 00:06:02,644 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:06:02,644 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:06:02,653 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:06:02,654 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:06:02,654 INFO L794 eck$LassoCheckResult]: Stem: 28905#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 28904#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 28851#L39 call main_#t~ret11 := fibo1(main_~x~0);< 28852#fibo1ENTRY ~n := #in~n; 29012#L10 assume !(~n < 1); 29011#L12 assume !(1 == ~n); 29007#L15 call #t~ret7 := fibo2(~n - 1);< 29010#fibo2ENTRY ~n := #in~n; 29009#L20 assume !(~n < 1); 29008#L22 assume !(1 == ~n); 29003#L25 call #t~ret9 := fibo1(~n - 1);< 29006#fibo1ENTRY ~n := #in~n; 29005#L10 assume !(~n < 1); 29004#L12 assume !(1 == ~n); 28998#L15 call #t~ret7 := fibo2(~n - 1);< 29002#fibo2ENTRY ~n := #in~n; 29001#L20 assume !(~n < 1); 29000#L22 assume !(1 == ~n); 28963#L25 call #t~ret9 := fibo1(~n - 1);< 28996#fibo1ENTRY ~n := #in~n; 28993#L10 assume !(~n < 1); 28978#L12 assume !(1 == ~n); 28968#L15 call #t~ret7 := fibo2(~n - 1);< 28987#fibo2ENTRY ~n := #in~n; 28985#L20 assume !(~n < 1); 28981#L22 assume 1 == ~n;#res := 1; 28982#fibo2FINAL assume true; 28967#fibo2EXIT >#52#return; 28961#L15-1 call #t~ret8 := fibo2(~n - 2);< 28964#fibo2ENTRY ~n := #in~n; 29013#L20 assume !(~n < 1); 29014#L22 assume !(1 == ~n); 28947#L25 call #t~ret9 := fibo1(~n - 1);< 28946#fibo1ENTRY ~n := #in~n; 28948#L10 assume !(~n < 1); 28977#L12 assume !(1 == ~n); 28966#L15 call #t~ret7 := fibo2(~n - 1);< 28969#fibo2ENTRY ~n := #in~n; 28991#L20 assume !(~n < 1); 28979#L22 assume 1 == ~n;#res := 1; 28974#fibo2FINAL assume true; 28965#fibo2EXIT >#52#return; 28961#L15-1 call #t~ret8 := fibo2(~n - 2);< 28964#fibo2ENTRY ~n := #in~n; 29015#L20 assume !(~n < 1); 30398#L22 assume !(1 == ~n); 30002#L25 call #t~ret9 := fibo1(~n - 1);< 30003#fibo1ENTRY ~n := #in~n; 30393#L10 assume !(~n < 1); 30391#L12 assume 1 == ~n;#res := 1; 30390#fibo1FINAL assume true; 30001#fibo1EXIT >#48#return; 29996#L25-1 call #t~ret10 := fibo1(~n - 2);< 29999#fibo1ENTRY ~n := #in~n; 30297#L10 assume ~n < 1;#res := 0; 30287#fibo1FINAL assume true; 29995#fibo1EXIT >#50#return; 29990#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 29989#fibo2FINAL assume true; 29958#fibo2EXIT >#54#return; 29947#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 29939#fibo1FINAL assume true; 29880#fibo1EXIT >#48#return; 29878#L25-1 [2020-11-30 00:06:02,654 INFO L796 eck$LassoCheckResult]: Loop: 29878#L25-1 call #t~ret10 := fibo1(~n - 2);< 29927#fibo1ENTRY ~n := #in~n; 29986#L10 assume !(~n < 1); 29984#L12 assume !(1 == ~n); 29926#L15 call #t~ret7 := fibo2(~n - 1);< 29983#fibo2ENTRY ~n := #in~n; 30397#L20 assume !(~n < 1); 30395#L22 assume 1 == ~n;#res := 1; 29982#fibo2FINAL assume true; 29953#fibo2EXIT >#52#return; 29954#L15-1 call #t~ret8 := fibo2(~n - 2);< 29959#fibo2ENTRY ~n := #in~n; 30220#L20 assume !(~n < 1); 30218#L22 assume !(1 == ~n); 29882#L25 call #t~ret9 := fibo1(~n - 1);< 29925#fibo1ENTRY ~n := #in~n; 30433#L10 assume !(~n < 1); 30431#L12 assume !(1 == ~n); 30114#L15 call #t~ret7 := fibo2(~n - 1);< 30115#fibo2ENTRY ~n := #in~n; 30209#L20 assume !(~n < 1); 30185#L22 assume 1 == ~n;#res := 1; 30133#fibo2FINAL assume true; 30112#fibo2EXIT >#52#return; 30103#L15-1 call #t~ret8 := fibo2(~n - 2);< 30108#fibo2ENTRY ~n := #in~n; 30174#L20 assume ~n < 1;#res := 0; 30140#fibo2FINAL assume true; 30102#fibo2EXIT >#54#return; 30101#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 30099#fibo1FINAL assume true; 30096#fibo1EXIT >#48#return; 29878#L25-1 [2020-11-30 00:06:02,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:06:02,655 INFO L82 PathProgramCache]: Analyzing trace with hash -947123609, now seen corresponding path program 1 times [2020-11-30 00:06:02,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:06:02,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283970133] [2020-11-30 00:06:02,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:06:02,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:02,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-11-30 00:06:02,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:02,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-30 00:06:02,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:02,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:06:02,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:02,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-30 00:06:02,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:02,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:06:02,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:02,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-30 00:06:02,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:02,839 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 11 proven. 79 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-11-30 00:06:02,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283970133] [2020-11-30 00:06:02,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684850117] [2020-11-30 00:06:02,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:06:02,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:02,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-30 00:06:02,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:06:02,973 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 62 proven. 22 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-11-30 00:06:02,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:06:02,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-30 00:06:02,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37855151] [2020-11-30 00:06:02,975 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-30 00:06:02,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:06:02,976 INFO L82 PathProgramCache]: Analyzing trace with hash 630784763, now seen corresponding path program 1 times [2020-11-30 00:06:02,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:06:02,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828902759] [2020-11-30 00:06:02,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:06:02,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:03,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-30 00:06:03,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:03,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-30 00:06:03,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:03,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:06:03,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:03,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-30 00:06:03,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:03,062 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-30 00:06:03,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828902759] [2020-11-30 00:06:03,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219416159] [2020-11-30 00:06:03,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:06:03,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:03,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-30 00:06:03,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:06:03,151 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-30 00:06:03,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:06:03,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-30 00:06:03,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527075769] [2020-11-30 00:06:03,152 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-30 00:06:03,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:06:03,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 00:06:03,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-30 00:06:03,152 INFO L87 Difference]: Start difference. First operand 3231 states and 4807 transitions. cyclomatic complexity: 1612 Second operand 8 states. [2020-11-30 00:06:03,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:06:03,301 INFO L93 Difference]: Finished difference Result 1630 states and 2151 transitions. [2020-11-30 00:06:03,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 00:06:03,302 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1630 states and 2151 transitions. [2020-11-30 00:06:03,324 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 132 [2020-11-30 00:06:03,345 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1630 states to 1533 states and 2040 transitions. [2020-11-30 00:06:03,346 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 596 [2020-11-30 00:06:03,347 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 596 [2020-11-30 00:06:03,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1533 states and 2040 transitions. [2020-11-30 00:06:03,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:06:03,348 INFO L691 BuchiCegarLoop]: Abstraction has 1533 states and 2040 transitions. [2020-11-30 00:06:03,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states and 2040 transitions. [2020-11-30 00:06:03,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1399. [2020-11-30 00:06:03,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1399 states. [2020-11-30 00:06:03,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 1795 transitions. [2020-11-30 00:06:03,445 INFO L714 BuchiCegarLoop]: Abstraction has 1399 states and 1795 transitions. [2020-11-30 00:06:03,445 INFO L594 BuchiCegarLoop]: Abstraction has 1399 states and 1795 transitions. [2020-11-30 00:06:03,445 INFO L427 BuchiCegarLoop]: ======== Iteration 9============ [2020-11-30 00:06:03,446 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 1399 states and 1795 transitions. [2020-11-30 00:06:03,455 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 132 [2020-11-30 00:06:03,455 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:06:03,455 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:06:03,458 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:06:03,458 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [10, 9, 8, 7, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2] [2020-11-30 00:06:03,458 INFO L794 eck$LassoCheckResult]: Stem: 34167#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 34164#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 34121#L39 call main_#t~ret11 := fibo1(main_~x~0);< 34122#fibo1ENTRY ~n := #in~n; 34211#L10 assume !(~n < 1); 34210#L12 assume !(1 == ~n); 34206#L15 call #t~ret7 := fibo2(~n - 1);< 34209#fibo2ENTRY ~n := #in~n; 34208#L20 assume !(~n < 1); 34207#L22 assume !(1 == ~n); 34200#L25 call #t~ret9 := fibo1(~n - 1);< 34205#fibo1ENTRY ~n := #in~n; 34203#L10 assume !(~n < 1); 34204#L12 assume !(1 == ~n); 34193#L15 call #t~ret7 := fibo2(~n - 1);< 34201#fibo2ENTRY ~n := #in~n; 34196#L20 assume !(~n < 1); 34197#L22 assume !(1 == ~n); 34189#L25 call #t~ret9 := fibo1(~n - 1);< 34188#fibo1ENTRY ~n := #in~n; 34191#L10 assume !(~n < 1); 34202#L12 assume !(1 == ~n); 34195#L15 call #t~ret7 := fibo2(~n - 1);< 34198#fibo2ENTRY ~n := #in~n; 34199#L20 assume !(~n < 1); 34194#L22 assume !(1 == ~n); 34190#L25 call #t~ret9 := fibo1(~n - 1);< 34188#fibo1ENTRY ~n := #in~n; 34191#L10 assume !(~n < 1); 34202#L12 assume !(1 == ~n); 34195#L15 call #t~ret7 := fibo2(~n - 1);< 34198#fibo2ENTRY ~n := #in~n; 34199#L20 assume !(~n < 1); 34194#L22 assume !(1 == ~n); 34190#L25 call #t~ret9 := fibo1(~n - 1);< 34188#fibo1ENTRY ~n := #in~n; 34192#L10 assume !(~n < 1); 34243#L12 assume 1 == ~n;#res := 1; 34244#fibo1FINAL assume true; 35197#fibo1EXIT >#48#return; 35193#L25-1 call #t~ret10 := fibo1(~n - 2);< 35196#fibo1ENTRY ~n := #in~n; 35199#L10 assume ~n < 1;#res := 0; 35198#fibo1FINAL assume true; 35192#fibo1EXIT >#50#return; 35190#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 35188#fibo2FINAL assume true; 35087#fibo2EXIT >#52#return; 34139#L15-1 call #t~ret8 := fibo2(~n - 2);< 35097#fibo2ENTRY ~n := #in~n; 35362#L20 assume ~n < 1;#res := 0; 35361#fibo2FINAL assume true; 35360#fibo2EXIT >#54#return; 35356#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 35350#fibo1FINAL assume true; 35118#fibo1EXIT >#48#return; 35089#L25-1 [2020-11-30 00:06:03,464 INFO L796 eck$LassoCheckResult]: Loop: 35089#L25-1 call #t~ret10 := fibo1(~n - 2);< 35108#fibo1ENTRY ~n := #in~n; 35148#L10 assume !(~n < 1); 35146#L12 assume !(1 == ~n); 35082#L15 call #t~ret7 := fibo2(~n - 1);< 35093#fibo2ENTRY ~n := #in~n; 35134#L20 assume !(~n < 1); 35130#L22 assume !(1 == ~n); 35092#L25 call #t~ret9 := fibo1(~n - 1);< 35108#fibo1ENTRY ~n := #in~n; 35148#L10 assume !(~n < 1); 35146#L12 assume !(1 == ~n); 35082#L15 call #t~ret7 := fibo2(~n - 1);< 35093#fibo2ENTRY ~n := #in~n; 35134#L20 assume !(~n < 1); 35130#L22 assume !(1 == ~n); 35092#L25 call #t~ret9 := fibo1(~n - 1);< 35108#fibo1ENTRY ~n := #in~n; 35148#L10 assume !(~n < 1); 35146#L12 assume !(1 == ~n); 35082#L15 call #t~ret7 := fibo2(~n - 1);< 35093#fibo2ENTRY ~n := #in~n; 35134#L20 assume !(~n < 1); 35130#L22 assume !(1 == ~n); 35092#L25 call #t~ret9 := fibo1(~n - 1);< 35108#fibo1ENTRY ~n := #in~n; 35148#L10 assume !(~n < 1); 35146#L12 assume 1 == ~n;#res := 1; 35144#fibo1FINAL assume true; 35137#fibo1EXIT >#48#return; 35110#L25-1 call #t~ret10 := fibo1(~n - 2);< 35111#fibo1ENTRY ~n := #in~n; 35353#L10 assume ~n < 1;#res := 0; 35149#fibo1FINAL assume true; 35109#fibo1EXIT >#50#return; 35102#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 35096#fibo2FINAL assume true; 35081#fibo2EXIT >#52#return; 34138#L15-1 call #t~ret8 := fibo2(~n - 2);< 35151#fibo2ENTRY ~n := #in~n; 35402#L20 assume ~n < 1;#res := 0; 35247#fibo2FINAL assume true; 35154#fibo2EXIT >#54#return; 35156#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 35349#fibo1FINAL assume true; 35104#fibo1EXIT >#48#return; 35089#L25-1 call #t~ret10 := fibo1(~n - 2);< 35108#fibo1ENTRY ~n := #in~n; 35148#L10 assume !(~n < 1); 35146#L12 assume 1 == ~n;#res := 1; 35144#fibo1FINAL assume true; 35137#fibo1EXIT >#50#return; 35106#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 35142#fibo2FINAL assume true; 35132#fibo2EXIT >#52#return; 34138#L15-1 call #t~ret8 := fibo2(~n - 2);< 35133#fibo2ENTRY ~n := #in~n; 35147#L20 assume !(~n < 1); 35145#L22 assume !(1 == ~n); 34962#L25 call #t~ret9 := fibo1(~n - 1);< 35121#fibo1ENTRY ~n := #in~n; 35162#L10 assume !(~n < 1); 35047#L12 assume !(1 == ~n); 35048#L15 call #t~ret7 := fibo2(~n - 1);< 35185#fibo2ENTRY ~n := #in~n; 35219#L20 assume !(~n < 1); 35228#L22 assume !(1 == ~n); 35223#L25 call #t~ret9 := fibo1(~n - 1);< 35226#fibo1ENTRY ~n := #in~n; 35284#L10 assume !(~n < 1); 35283#L12 assume 1 == ~n;#res := 1; 35230#fibo1FINAL assume true; 35222#fibo1EXIT >#48#return; 35205#L25-1 call #t~ret10 := fibo1(~n - 2);< 35209#fibo1ENTRY ~n := #in~n; 35278#L10 assume ~n < 1;#res := 0; 35275#fibo1FINAL assume true; 35202#fibo1EXIT >#50#return; 35201#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 35200#fibo2FINAL assume true; 35184#fibo2EXIT >#52#return; 35177#L15-1 call #t~ret8 := fibo2(~n - 2);< 35182#fibo2ENTRY ~n := #in~n; 35216#L20 assume ~n < 1;#res := 0; 35181#fibo2FINAL assume true; 35176#fibo2EXIT >#54#return; 35179#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 35433#fibo1FINAL assume true; 35119#fibo1EXIT >#48#return; 35089#L25-1 call #t~ret10 := fibo1(~n - 2);< 35108#fibo1ENTRY ~n := #in~n; 35148#L10 assume !(~n < 1); 35146#L12 assume 1 == ~n;#res := 1; 35144#fibo1FINAL assume true; 35137#fibo1EXIT >#50#return; 35106#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 35142#fibo2FINAL assume true; 35132#fibo2EXIT >#54#return; 35083#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 35129#fibo1FINAL assume true; 35120#fibo1EXIT >#48#return; 35089#L25-1 [2020-11-30 00:06:03,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:06:03,465 INFO L82 PathProgramCache]: Analyzing trace with hash 50807002, now seen corresponding path program 1 times [2020-11-30 00:06:03,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:06:03,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160080373] [2020-11-30 00:06:03,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:06:03,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:03,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-11-30 00:06:03,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:03,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:06:03,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:03,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:06:03,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:03,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-30 00:06:03,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:03,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-11-30 00:06:03,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:03,904 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 28 proven. 47 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-30 00:06:03,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160080373] [2020-11-30 00:06:03,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407182490] [2020-11-30 00:06:03,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:06:03,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:03,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-30 00:06:03,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:06:04,222 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-30 00:06:04,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:06:04,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 24 [2020-11-30 00:06:04,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036872103] [2020-11-30 00:06:04,223 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-30 00:06:04,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:06:04,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1246817762, now seen corresponding path program 1 times [2020-11-30 00:06:04,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:06:04,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005943782] [2020-11-30 00:06:04,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:06:04,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:04,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-30 00:06:04,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:04,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:06:04,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:04,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:06:04,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:04,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:06:04,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:04,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:06:04,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:04,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-30 00:06:04,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:04,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-11-30 00:06:04,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:04,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-11-30 00:06:04,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:04,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-11-30 00:06:04,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:04,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:06:04,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:04,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:06:04,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:04,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:06:04,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:04,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-30 00:06:04,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:04,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-11-30 00:06:04,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:04,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-11-30 00:06:04,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:04,535 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 36 proven. 51 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2020-11-30 00:06:04,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005943782] [2020-11-30 00:06:04,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500148281] [2020-11-30 00:06:04,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:06:04,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:04,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 00:06:04,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:06:04,700 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 175 proven. 6 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2020-11-30 00:06:04,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:06:04,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-11-30 00:06:04,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638294214] [2020-11-30 00:06:04,703 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-30 00:06:04,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:06:04,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-30 00:06:04,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2020-11-30 00:06:04,705 INFO L87 Difference]: Start difference. First operand 1399 states and 1795 transitions. cyclomatic complexity: 410 Second operand 24 states. [2020-11-30 00:06:06,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:06:06,056 INFO L93 Difference]: Finished difference Result 1581 states and 1917 transitions. [2020-11-30 00:06:06,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-30 00:06:06,057 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1581 states and 1917 transitions. [2020-11-30 00:06:06,073 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 141 [2020-11-30 00:06:06,084 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1581 states to 859 states and 1021 transitions. [2020-11-30 00:06:06,084 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 476 [2020-11-30 00:06:06,085 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 476 [2020-11-30 00:06:06,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 859 states and 1021 transitions. [2020-11-30 00:06:06,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:06:06,086 INFO L691 BuchiCegarLoop]: Abstraction has 859 states and 1021 transitions. [2020-11-30 00:06:06,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states and 1021 transitions. [2020-11-30 00:06:06,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 738. [2020-11-30 00:06:06,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 738 states. [2020-11-30 00:06:06,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 882 transitions. [2020-11-30 00:06:06,115 INFO L714 BuchiCegarLoop]: Abstraction has 738 states and 882 transitions. [2020-11-30 00:06:06,115 INFO L594 BuchiCegarLoop]: Abstraction has 738 states and 882 transitions. [2020-11-30 00:06:06,115 INFO L427 BuchiCegarLoop]: ======== Iteration 10============ [2020-11-30 00:06:06,115 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 738 states and 882 transitions. [2020-11-30 00:06:06,120 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 108 [2020-11-30 00:06:06,120 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:06:06,120 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:06:06,121 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:06:06,122 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:06:06,122 INFO L794 eck$LassoCheckResult]: Stem: 38046#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 38041#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 38018#L39 call main_#t~ret11 := fibo1(main_~x~0);< 38019#fibo1ENTRY ~n := #in~n; 38130#L10 assume !(~n < 1); 38129#L12 assume !(1 == ~n); 38125#L15 call #t~ret7 := fibo2(~n - 1);< 38128#fibo2ENTRY ~n := #in~n; 38127#L20 assume !(~n < 1); 38126#L22 assume !(1 == ~n); 38121#L25 call #t~ret9 := fibo1(~n - 1);< 38124#fibo1ENTRY ~n := #in~n; 38123#L10 assume !(~n < 1); 38122#L12 assume !(1 == ~n); 38117#L15 call #t~ret7 := fibo2(~n - 1);< 38120#fibo2ENTRY ~n := #in~n; 38119#L20 assume !(~n < 1); 38118#L22 assume !(1 == ~n); 38094#L25 call #t~ret9 := fibo1(~n - 1);< 38095#fibo1ENTRY ~n := #in~n; 38115#L10 assume !(~n < 1); 38112#L12 assume !(1 == ~n); 38090#L15 call #t~ret7 := fibo2(~n - 1);< 38103#fibo2ENTRY ~n := #in~n; 38099#L20 assume !(~n < 1); 38097#L22 assume !(1 == ~n); 38093#L25 call #t~ret9 := fibo1(~n - 1);< 38095#fibo1ENTRY ~n := #in~n; 38114#L10 assume !(~n < 1); 38110#L12 assume 1 == ~n;#res := 1; 38111#fibo1FINAL assume true; 38334#fibo1EXIT >#48#return; 38331#L25-1 call #t~ret10 := fibo1(~n - 2);< 38332#fibo1ENTRY ~n := #in~n; 38515#L10 assume ~n < 1;#res := 0; 38514#fibo1FINAL assume true; 38330#fibo1EXIT >#50#return; 38328#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 38326#fibo2FINAL assume true; 38325#fibo2EXIT >#52#return; 38315#L15-1 call #t~ret8 := fibo2(~n - 2);< 38322#fibo2ENTRY ~n := #in~n; 38531#L20 assume !(~n < 1); 38530#L22 assume 1 == ~n;#res := 1; 38529#fibo2FINAL assume true; 38333#fibo2EXIT >#54#return; 38329#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 38327#fibo1FINAL assume true; 38324#fibo1EXIT >#48#return; 38288#L25-1 call #t~ret10 := fibo1(~n - 2);< 38295#fibo1ENTRY [2020-11-30 00:06:06,122 INFO L796 eck$LassoCheckResult]: Loop: 38295#fibo1ENTRY ~n := #in~n; 38522#L10 assume !(~n < 1); 38519#L12 assume !(1 == ~n); 38314#L15 call #t~ret7 := fibo2(~n - 1);< 38320#fibo2ENTRY ~n := #in~n; 38353#L20 assume !(~n < 1); 38346#L22 assume !(1 == ~n); 38285#L25 call #t~ret9 := fibo1(~n - 1);< 38303#fibo1ENTRY ~n := #in~n; 38523#L10 assume !(~n < 1); 38519#L12 assume !(1 == ~n); 38314#L15 call #t~ret7 := fibo2(~n - 1);< 38320#fibo2ENTRY ~n := #in~n; 38353#L20 assume !(~n < 1); 38346#L22 assume 1 == ~n;#res := 1; 38306#fibo2FINAL assume true; 38538#fibo2EXIT >#52#return; 38534#L15-1 call #t~ret8 := fibo2(~n - 2);< 38535#fibo2ENTRY ~n := #in~n; 38542#L20 assume ~n < 1;#res := 0; 38540#fibo2FINAL assume true; 38533#fibo2EXIT >#54#return; 38532#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 38340#fibo1FINAL assume true; 38336#fibo1EXIT >#48#return; 38286#L25-1 call #t~ret10 := fibo1(~n - 2);< 38295#fibo1ENTRY [2020-11-30 00:06:06,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:06:06,123 INFO L82 PathProgramCache]: Analyzing trace with hash 482791451, now seen corresponding path program 2 times [2020-11-30 00:06:06,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:06:06,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289423667] [2020-11-30 00:06:06,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:06:06,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:06,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-30 00:06:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:06,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:06:06,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:06,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:06:06,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:06,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-30 00:06:06,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:06,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-11-30 00:06:06,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:06,389 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 3 proven. 50 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-30 00:06:06,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289423667] [2020-11-30 00:06:06,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552268072] [2020-11-30 00:06:06,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:06:06,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 00:06:06,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:06:06,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-30 00:06:06,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:06:06,588 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 3 proven. 50 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-30 00:06:06,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:06:06,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-11-30 00:06:06,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277396521] [2020-11-30 00:06:06,589 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-30 00:06:06,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:06:06,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1552659165, now seen corresponding path program 2 times [2020-11-30 00:06:06,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:06:06,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276314778] [2020-11-30 00:06:06,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:06:06,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:06:06,599 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:06:06,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:06:06,605 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:06:06,609 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:06:06,839 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2020-11-30 00:06:07,168 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:06:07,168 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:06:07,168 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:06:07,169 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:06:07,169 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-30 00:06:07,169 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:06:07,169 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:06:07,169 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:06:07,169 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration10_Loop [2020-11-30 00:06:07,169 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:06:07,169 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:06:07,170 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:07,173 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:07,188 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:07,191 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:07,198 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:07,202 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:07,205 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:07,209 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:07,213 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:07,220 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:07,326 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:06:07,326 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 96 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:06:07,336 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:06:07,337 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 96 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:06:07,341 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:06:07,341 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret8=0} Honda state: {fibo1_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 97 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:06:07,389 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:06:07,389 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 97 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 98 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:06:07,439 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-30 00:06:07,439 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 98 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:06:07,577 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-30 00:06:07,579 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:06:07,579 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:06:07,579 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:06:07,579 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:06:07,580 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-30 00:06:07,580 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:06:07,580 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:06:07,580 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:06:07,580 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration10_Loop [2020-11-30 00:06:07,580 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:06:07,580 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:06:07,581 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:07,585 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:07,599 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:07,602 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:07,606 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:07,612 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:07,616 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:07,624 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:07,628 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:07,631 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:07,729 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:06:07,729 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 99 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:06:07,740 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 [2020-11-30 00:06:07,742 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:06:07,743 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:06:07,743 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:06:07,743 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:06:07,743 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:06:07,744 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:06:07,744 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 99 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:06:07,746 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 100 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 100 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:06:07,791 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 [2020-11-30 00:06:07,793 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:06:07,793 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:06:07,793 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:06:07,793 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:06:07,793 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:06:07,795 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:06:07,795 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:06:07,797 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-30 00:06:07,800 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-30 00:06:07,801 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_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 101 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 101 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:06:07,803 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-30 00:06:07,803 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-30 00:06:07,803 INFO L510 LassoAnalysis]: Proved termination. [2020-11-30 00:06:07,803 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_#in~n) = 1*fibo1_#in~n Supporting invariants [] [2020-11-30 00:06:07,828 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-30 00:06:07,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:06:07,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:07,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-30 00:06:07,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:06:08,014 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:06:08,016 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:06:08,018 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:06:08,021 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:06:08,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:08,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-30 00:06:08,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:06:08,300 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 00:06:08,301 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 10 loop predicates [2020-11-30 00:06:08,301 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 738 states and 882 transitions. cyclomatic complexity: 153 Second operand 12 states. [2020-11-30 00:06:08,599 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 738 states and 882 transitions. cyclomatic complexity: 153. Second operand 12 states. Result 873 states and 1029 transitions. Complement of second has 16 states. [2020-11-30 00:06:08,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2020-11-30 00:06:08,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-30 00:06:08,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 41 transitions. [2020-11-30 00:06:08,613 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 41 transitions. Stem has 50 letters. Loop has 26 letters. [2020-11-30 00:06:08,613 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:06:08,613 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-30 00:06:08,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:06:08,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:08,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-30 00:06:08,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:06:08,827 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:06:08,830 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:06:08,836 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:06:08,838 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:06:08,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:08,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-30 00:06:08,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:06:09,135 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 00:06:09,136 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 10 loop predicates [2020-11-30 00:06:09,136 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 738 states and 882 transitions. cyclomatic complexity: 153 Second operand 12 states. [2020-11-30 00:06:09,717 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 738 states and 882 transitions. cyclomatic complexity: 153. Second operand 12 states. Result 925 states and 1086 transitions. Complement of second has 39 states. [2020-11-30 00:06:09,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2020-11-30 00:06:09,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-30 00:06:09,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 56 transitions. [2020-11-30 00:06:09,719 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 56 transitions. Stem has 50 letters. Loop has 26 letters. [2020-11-30 00:06:09,719 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:06:09,719 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-30 00:06:09,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:06:09,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:09,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-30 00:06:09,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:06:09,853 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:06:09,855 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:06:09,857 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:06:09,860 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:06:09,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:09,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-30 00:06:09,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:06:10,201 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 00:06:10,202 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 10 loop predicates [2020-11-30 00:06:10,202 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 738 states and 882 transitions. cyclomatic complexity: 153 Second operand 12 states. [2020-11-30 00:06:10,636 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 738 states and 882 transitions. cyclomatic complexity: 153. Second operand 12 states. Result 1091 states and 1260 transitions. Complement of second has 15 states. [2020-11-30 00:06:10,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2020-11-30 00:06:10,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-30 00:06:10,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 45 transitions. [2020-11-30 00:06:10,637 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 45 transitions. Stem has 50 letters. Loop has 26 letters. [2020-11-30 00:06:10,639 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:06:10,640 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-30 00:06:10,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:06:10,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:10,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-30 00:06:10,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:06:10,783 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:06:10,786 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:06:10,790 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:06:10,792 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:06:10,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:10,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-30 00:06:10,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:06:11,068 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 00:06:11,068 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and with honda bouncer for loop.2 stem predicates 10 loop predicates [2020-11-30 00:06:11,069 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 738 states and 882 transitions. cyclomatic complexity: 153 Second operand 12 states. [2020-11-30 00:06:11,871 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 738 states and 882 transitions. cyclomatic complexity: 153. Second operand 12 states. Result 1443 states and 1661 transitions. Complement of second has 43 states. [2020-11-30 00:06:11,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2020-11-30 00:06:11,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-30 00:06:11,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 60 transitions. [2020-11-30 00:06:11,873 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 60 transitions. Stem has 50 letters. Loop has 26 letters. [2020-11-30 00:06:11,875 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:06:11,875 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 60 transitions. Stem has 76 letters. Loop has 26 letters. [2020-11-30 00:06:11,876 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:06:11,876 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 60 transitions. Stem has 50 letters. Loop has 52 letters. [2020-11-30 00:06:11,877 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:06:11,878 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1443 states and 1661 transitions. [2020-11-30 00:06:11,891 INFO L131 ngComponentsAnalysis]: Automaton has 8 accepting balls. 188 [2020-11-30 00:06:11,903 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1443 states to 1051 states and 1245 transitions. [2020-11-30 00:06:11,903 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 439 [2020-11-30 00:06:11,905 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 498 [2020-11-30 00:06:11,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1051 states and 1245 transitions. [2020-11-30 00:06:11,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:06:11,905 INFO L691 BuchiCegarLoop]: Abstraction has 1051 states and 1245 transitions. [2020-11-30 00:06:11,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states and 1245 transitions. [2020-11-30 00:06:11,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 951. [2020-11-30 00:06:11,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 951 states. [2020-11-30 00:06:11,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 1110 transitions. [2020-11-30 00:06:11,935 INFO L714 BuchiCegarLoop]: Abstraction has 951 states and 1110 transitions. [2020-11-30 00:06:11,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:06:11,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-30 00:06:11,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-11-30 00:06:11,936 INFO L87 Difference]: Start difference. First operand 951 states and 1110 transitions. Second operand 18 states. [2020-11-30 00:06:12,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:06:12,649 INFO L93 Difference]: Finished difference Result 1468 states and 1837 transitions. [2020-11-30 00:06:12,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-30 00:06:12,650 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1468 states and 1837 transitions. [2020-11-30 00:06:12,664 INFO L131 ngComponentsAnalysis]: Automaton has 10 accepting balls. 288 [2020-11-30 00:06:12,681 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1468 states to 1398 states and 1727 transitions. [2020-11-30 00:06:12,682 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 618 [2020-11-30 00:06:12,683 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 618 [2020-11-30 00:06:12,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1398 states and 1727 transitions. [2020-11-30 00:06:12,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:06:12,684 INFO L691 BuchiCegarLoop]: Abstraction has 1398 states and 1727 transitions. [2020-11-30 00:06:12,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1398 states and 1727 transitions. [2020-11-30 00:06:12,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1398 to 1143. [2020-11-30 00:06:12,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1143 states. [2020-11-30 00:06:12,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 1395 transitions. [2020-11-30 00:06:12,724 INFO L714 BuchiCegarLoop]: Abstraction has 1143 states and 1395 transitions. [2020-11-30 00:06:12,724 INFO L594 BuchiCegarLoop]: Abstraction has 1143 states and 1395 transitions. [2020-11-30 00:06:12,724 INFO L427 BuchiCegarLoop]: ======== Iteration 11============ [2020-11-30 00:06:12,725 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 1143 states and 1395 transitions. [2020-11-30 00:06:12,731 INFO L131 ngComponentsAnalysis]: Automaton has 7 accepting balls. 212 [2020-11-30 00:06:12,731 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:06:12,732 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:06:12,733 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 5, 5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:06:12,733 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:06:12,733 INFO L794 eck$LassoCheckResult]: Stem: 46911#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 46910#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 46874#L39 call main_#t~ret11 := fibo1(main_~x~0);< 46875#fibo1ENTRY ~n := #in~n; 46951#L10 assume !(~n < 1); 46949#L12 assume !(1 == ~n); 46946#L15 call #t~ret7 := fibo2(~n - 1);< 46947#fibo2ENTRY ~n := #in~n; 46962#L20 assume !(~n < 1); 46960#L22 assume !(1 == ~n); 46957#L25 call #t~ret9 := fibo1(~n - 1);< 46958#fibo1ENTRY ~n := #in~n; 47025#L10 assume !(~n < 1); 47022#L12 assume !(1 == ~n); 46974#L15 call #t~ret7 := fibo2(~n - 1);< 46975#fibo2ENTRY ~n := #in~n; 47113#L20 assume !(~n < 1); 47110#L22 assume !(1 == ~n); 47020#L25 call #t~ret9 := fibo1(~n - 1);< 47021#fibo1ENTRY ~n := #in~n; 47411#L10 assume !(~n < 1); 47405#L12 assume !(1 == ~n); 47398#L15 call #t~ret7 := fibo2(~n - 1);< 47400#fibo2ENTRY ~n := #in~n; 47417#L20 assume !(~n < 1); 47415#L22 assume !(1 == ~n); 47019#L25 call #t~ret9 := fibo1(~n - 1);< 47021#fibo1ENTRY ~n := #in~n; 47414#L10 assume !(~n < 1); 47537#L12 assume 1 == ~n;#res := 1; 47536#fibo1FINAL assume true; 47530#fibo1EXIT >#48#return; 47524#L25-1 call #t~ret10 := fibo1(~n - 2);< 47525#fibo1ENTRY ~n := #in~n; 47535#L10 assume ~n < 1;#res := 0; 47529#fibo1FINAL assume true; 47523#fibo1EXIT >#50#return; 47521#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 47520#fibo2FINAL assume true; 47453#fibo2EXIT >#52#return; 47133#L15-1 call #t~ret8 := fibo2(~n - 2);< 47449#fibo2ENTRY ~n := #in~n; 47448#L20 assume !(~n < 1); 47447#L22 assume !(1 == ~n); 47445#L25 call #t~ret9 := fibo1(~n - 1);< 47446#fibo1ENTRY ~n := #in~n; 47468#L10 assume !(~n < 1); 47466#L12 assume !(1 == ~n); 47467#L15 call #t~ret7 := fibo2(~n - 1);< 47511#fibo2ENTRY ~n := #in~n; 47519#L20 assume !(~n < 1); 47955#L22 assume !(1 == ~n); 46883#L25 [2020-11-30 00:06:12,734 INFO L796 eck$LassoCheckResult]: Loop: 46883#L25 call #t~ret9 := fibo1(~n - 1);< 47908#fibo1ENTRY ~n := #in~n; 47910#L10 assume !(~n < 1); 47909#L12 assume !(1 == ~n); 46853#L15 call #t~ret7 := fibo2(~n - 1);< 47902#fibo2ENTRY ~n := #in~n; 47896#L20 assume !(~n < 1); 47892#L22 assume !(1 == ~n); 47887#L25 call #t~ret9 := fibo1(~n - 1);< 47888#fibo1ENTRY ~n := #in~n; 47894#L10 assume !(~n < 1); 47890#L12 assume 1 == ~n;#res := 1; 47889#fibo1FINAL assume true; 47886#fibo1EXIT >#48#return; 46906#L25-1 call #t~ret10 := fibo1(~n - 2);< 46907#fibo1ENTRY ~n := #in~n; 46912#L10 assume ~n < 1;#res := 0; 47907#fibo1FINAL assume true; 47904#fibo1EXIT >#50#return; 46850#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 46855#fibo2FINAL assume true; 46870#fibo2EXIT >#52#return; 46851#L15-1 call #t~ret8 := fibo2(~n - 2);< 47942#fibo2ENTRY ~n := #in~n; 47941#L20 assume !(~n < 1); 47940#L22 assume !(1 == ~n); 46877#L25 call #t~ret9 := fibo1(~n - 1);< 47939#fibo1ENTRY ~n := #in~n; 47963#L10 assume !(~n < 1); 47957#L12 assume !(1 == ~n); 46866#L15 call #t~ret7 := fibo2(~n - 1);< 47914#fibo2ENTRY ~n := #in~n; 47519#L20 assume !(~n < 1); 47955#L22 assume !(1 == ~n); 46883#L25 [2020-11-30 00:06:12,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:06:12,734 INFO L82 PathProgramCache]: Analyzing trace with hash -2135425092, now seen corresponding path program 1 times [2020-11-30 00:06:12,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:06:12,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971791093] [2020-11-30 00:06:12,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:06:12,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:12,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-11-30 00:06:12,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:12,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:06:12,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:12,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-30 00:06:12,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:13,002 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 38 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 00:06:13,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971791093] [2020-11-30 00:06:13,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405050787] [2020-11-30 00:06:13,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:06:13,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:13,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-30 00:06:13,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:06:13,171 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 38 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 00:06:13,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:06:13,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-11-30 00:06:13,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828394960] [2020-11-30 00:06:13,173 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-30 00:06:13,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:06:13,173 INFO L82 PathProgramCache]: Analyzing trace with hash 307692230, now seen corresponding path program 1 times [2020-11-30 00:06:13,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:06:13,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814114145] [2020-11-30 00:06:13,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:06:13,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:13,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-30 00:06:13,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:13,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:06:13,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:13,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-30 00:06:13,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:13,301 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 00:06:13,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814114145] [2020-11-30 00:06:13,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974817646] [2020-11-30 00:06:13,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:06:13,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:13,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-30 00:06:13,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:06:13,447 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 00:06:13,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:06:13,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 14 [2020-11-30 00:06:13,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390876608] [2020-11-30 00:06:13,448 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-30 00:06:13,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:06:13,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-30 00:06:13,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-11-30 00:06:13,449 INFO L87 Difference]: Start difference. First operand 1143 states and 1395 transitions. cyclomatic complexity: 264 Second operand 14 states. [2020-11-30 00:06:13,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:06:13,746 INFO L93 Difference]: Finished difference Result 962 states and 1134 transitions. [2020-11-30 00:06:13,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 00:06:13,750 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 962 states and 1134 transitions. [2020-11-30 00:06:13,758 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 144 [2020-11-30 00:06:13,767 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 962 states to 855 states and 1010 transitions. [2020-11-30 00:06:13,767 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 404 [2020-11-30 00:06:13,768 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 404 [2020-11-30 00:06:13,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 855 states and 1010 transitions. [2020-11-30 00:06:13,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:06:13,768 INFO L691 BuchiCegarLoop]: Abstraction has 855 states and 1010 transitions. [2020-11-30 00:06:13,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states and 1010 transitions. [2020-11-30 00:06:13,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 809. [2020-11-30 00:06:13,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 809 states. [2020-11-30 00:06:13,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 955 transitions. [2020-11-30 00:06:13,793 INFO L714 BuchiCegarLoop]: Abstraction has 809 states and 955 transitions. [2020-11-30 00:06:13,793 INFO L594 BuchiCegarLoop]: Abstraction has 809 states and 955 transitions. [2020-11-30 00:06:13,793 INFO L427 BuchiCegarLoop]: ======== Iteration 12============ [2020-11-30 00:06:13,793 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 809 states and 955 transitions. [2020-11-30 00:06:13,798 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 144 [2020-11-30 00:06:13,798 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:06:13,798 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:06:13,799 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:06:13,799 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:06:13,799 INFO L794 eck$LassoCheckResult]: Stem: 49370#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 49366#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 49335#L39 call main_#t~ret11 := fibo1(main_~x~0);< 49336#fibo1ENTRY ~n := #in~n; 49460#L10 assume !(~n < 1); 49459#L12 assume !(1 == ~n); 49450#L15 call #t~ret7 := fibo2(~n - 1);< 49456#fibo2ENTRY ~n := #in~n; 49454#L20 assume !(~n < 1); 49452#L22 assume !(1 == ~n); 49444#L25 call #t~ret9 := fibo1(~n - 1);< 49448#fibo1ENTRY ~n := #in~n; 49446#L10 assume !(~n < 1); 49445#L12 assume !(1 == ~n); 49430#L15 call #t~ret7 := fibo2(~n - 1);< 49439#fibo2ENTRY ~n := #in~n; 49437#L20 assume !(~n < 1); 49431#L22 assume !(1 == ~n); 49408#L25 call #t~ret9 := fibo1(~n - 1);< 49409#fibo1ENTRY ~n := #in~n; 49429#L10 assume !(~n < 1); 49428#L12 assume !(1 == ~n); 49403#L15 call #t~ret7 := fibo2(~n - 1);< 49425#fibo2ENTRY ~n := #in~n; 49419#L20 assume !(~n < 1); 49414#L22 assume !(1 == ~n); 49407#L25 call #t~ret9 := fibo1(~n - 1);< 49409#fibo1ENTRY ~n := #in~n; 49427#L10 assume !(~n < 1); 49426#L12 assume !(1 == ~n); 49423#L15 call #t~ret7 := fibo2(~n - 1);< 49424#fibo2ENTRY ~n := #in~n; 49455#L20 assume !(~n < 1); 49453#L22 assume 1 == ~n;#res := 1; 49436#fibo2FINAL assume true; 49422#fibo2EXIT >#52#return; 49417#L15-1 call #t~ret8 := fibo2(~n - 2);< 49418#fibo2ENTRY ~n := #in~n; 49435#L20 assume ~n < 1;#res := 0; 49421#fibo2FINAL assume true; 49416#fibo2EXIT >#54#return; 49413#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 49412#fibo1FINAL assume true; 49406#fibo1EXIT >#48#return; 49397#L25-1 call #t~ret10 := fibo1(~n - 2);< 49405#fibo1ENTRY ~n := #in~n; 49859#L10 assume !(~n < 1); 49842#L12 assume !(1 == ~n); 49352#L15 call #t~ret7 := fibo2(~n - 1);< 49838#fibo2ENTRY ~n := #in~n; 49848#L20 assume !(~n < 1); 49847#L22 assume !(1 == ~n); 49325#L25 [2020-11-30 00:06:13,799 INFO L796 eck$LassoCheckResult]: Loop: 49325#L25 call #t~ret9 := fibo1(~n - 1);< 49354#fibo1ENTRY ~n := #in~n; 49324#L10 assume !(~n < 1); 49326#L12 assume !(1 == ~n); 49349#L15 call #t~ret7 := fibo2(~n - 1);< 49367#fibo2ENTRY ~n := #in~n; 49998#L20 assume !(~n < 1); 49390#L22 assume !(1 == ~n); 49325#L25 [2020-11-30 00:06:13,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:06:13,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1830537364, now seen corresponding path program 2 times [2020-11-30 00:06:13,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:06:13,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013021336] [2020-11-30 00:06:13,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:06:13,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:14,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-11-30 00:06:14,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:14,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:06:14,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:14,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-30 00:06:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:14,054 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 54 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 00:06:14,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013021336] [2020-11-30 00:06:14,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166646422] [2020-11-30 00:06:14,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:06:14,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 00:06:14,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:06:14,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-30 00:06:14,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:06:14,179 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 54 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 00:06:14,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:06:14,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 20 [2020-11-30 00:06:14,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070270352] [2020-11-30 00:06:14,181 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-30 00:06:14,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:06:14,181 INFO L82 PathProgramCache]: Analyzing trace with hash -2095272006, now seen corresponding path program 3 times [2020-11-30 00:06:14,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:06:14,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981804939] [2020-11-30 00:06:14,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:06:14,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:06:14,184 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:06:14,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:06:14,186 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:06:14,187 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:06:14,354 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:06:14,355 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:06:14,355 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:06:14,355 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:06:14,355 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-30 00:06:14,355 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:06:14,355 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:06:14,355 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:06:14,355 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration12_Loop [2020-11-30 00:06:14,355 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:06:14,355 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:06:14,356 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:14,360 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:14,374 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:14,377 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:14,381 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:14,385 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:14,388 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:14,392 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:14,396 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:14,494 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:06:14,495 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 105 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:06:14,502 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:06:14,502 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 105 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:06:14,506 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:06:14,507 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 106 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:06:14,552 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:06:14,552 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 106 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 107 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 107 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:06:14,593 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-30 00:06:14,594 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:06:21,204 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (107)] Exception during sending of exit command (exit): Broken pipe [2020-11-30 00:06:21,218 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:06:21,218 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:06:21,218 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:06:21,218 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:06:21,218 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-30 00:06:21,218 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:06:21,218 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:06:21,218 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:06:21,218 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration12_Loop [2020-11-30 00:06:21,219 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:06:21,219 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:06:21,220 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:21,232 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:21,235 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:21,238 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:21,241 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:21,250 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:21,261 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:21,264 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:21,269 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:21,379 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:06:21,379 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 108 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 108 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:06:21,382 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 [2020-11-30 00:06:21,383 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:06:21,384 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:06:21,384 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:06:21,384 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:06:21,384 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:06:21,384 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:06:21,384 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:06:21,385 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 109 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 109 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:06:21,411 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 [2020-11-30 00:06:21,412 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:06:21,412 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:06:21,412 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:06:21,412 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:06:21,412 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:06:21,413 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:06:21,413 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:06:21,414 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 110 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 110 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:06:21,438 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 [2020-11-30 00:06:21,439 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:06:21,439 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:06:21,439 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:06:21,439 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:06:21,439 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:06:21,440 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:06:21,440 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:06:21,441 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 111 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 111 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:06:21,466 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 [2020-11-30 00:06:21,467 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:06:21,468 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:06:21,468 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:06:21,468 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:06:21,468 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:06:21,468 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:06:21,468 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:06:21,470 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 112 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 112 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:06:21,493 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 [2020-11-30 00:06:21,495 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:06:21,495 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:06:21,495 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:06:21,495 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:06:21,495 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:06:21,495 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:06:21,496 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:06:21,497 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 113 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 113 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:06:21,526 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 [2020-11-30 00:06:21,527 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:06:21,527 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:06:21,528 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:06:21,528 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:06:21,528 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:06:21,528 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:06:21,528 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:06:21,529 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 114 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 114 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:06:21,552 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 [2020-11-30 00:06:21,553 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:06:21,554 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:06:21,554 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:06:21,554 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:06:21,554 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:06:21,554 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:06:21,554 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:06:21,555 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 115 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 115 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:06:21,577 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 [2020-11-30 00:06:21,579 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:06:21,579 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:06:21,579 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:06:21,579 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:06:21,579 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:06:21,579 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:06:21,579 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:06:21,581 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 116 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 116 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:06:21,603 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 [2020-11-30 00:06:21,604 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:06:21,604 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:06:21,604 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:06:21,604 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:06:21,604 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:06:21,605 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:06:21,606 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:06:21,607 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-30 00:06:21,619 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-30 00:06:21,620 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_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 117 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 117 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:06:21,622 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-30 00:06:21,622 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-30 00:06:21,622 INFO L510 LassoAnalysis]: Proved termination. [2020-11-30 00:06:21,622 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_~n) = 1*fibo2_~n Supporting invariants [] [2020-11-30 00:06:21,643 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-30 00:06:21,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:06:21,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:21,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-30 00:06:21,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:06:21,769 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:06:21,771 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:06:21,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:21,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 00:06:21,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:06:21,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:06:21,883 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 [2020-11-30 00:06:21,883 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 809 states and 955 transitions. cyclomatic complexity: 155 Second operand 8 states. [2020-11-30 00:06:21,993 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 809 states and 955 transitions. cyclomatic complexity: 155. Second operand 8 states. Result 830 states and 977 transitions. Complement of second has 20 states. [2020-11-30 00:06:21,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2020-11-30 00:06:21,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-30 00:06:21,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 21 transitions. [2020-11-30 00:06:21,994 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 21 transitions. Stem has 52 letters. Loop has 8 letters. [2020-11-30 00:06:21,995 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:06:21,995 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-30 00:06:22,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:06:22,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:22,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-30 00:06:22,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:06:22,163 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:06:22,165 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:06:22,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:22,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 00:06:22,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:06:22,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:06:22,287 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 [2020-11-30 00:06:22,288 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 809 states and 955 transitions. cyclomatic complexity: 155 Second operand 8 states. [2020-11-30 00:06:22,471 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 809 states and 955 transitions. cyclomatic complexity: 155. Second operand 8 states. Result 836 states and 983 transitions. Complement of second has 22 states. [2020-11-30 00:06:22,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2020-11-30 00:06:22,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-30 00:06:22,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 24 transitions. [2020-11-30 00:06:22,485 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 24 transitions. Stem has 52 letters. Loop has 8 letters. [2020-11-30 00:06:22,485 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:06:22,485 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-30 00:06:22,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:06:22,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:22,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-30 00:06:22,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:06:22,637 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:06:22,639 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:06:22,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:22,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 00:06:22,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:06:22,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:06:22,754 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 [2020-11-30 00:06:22,754 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 809 states and 955 transitions. cyclomatic complexity: 155 Second operand 8 states. [2020-11-30 00:06:22,972 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 809 states and 955 transitions. cyclomatic complexity: 155. Second operand 8 states. Result 1195 states and 1399 transitions. Complement of second has 32 states. [2020-11-30 00:06:22,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2020-11-30 00:06:22,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-30 00:06:22,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 43 transitions. [2020-11-30 00:06:22,974 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 52 letters. Loop has 8 letters. [2020-11-30 00:06:22,975 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:06:22,975 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 60 letters. Loop has 8 letters. [2020-11-30 00:06:22,975 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:06:22,975 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 52 letters. Loop has 16 letters. [2020-11-30 00:06:22,976 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:06:22,976 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1195 states and 1399 transitions. [2020-11-30 00:06:22,984 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 156 [2020-11-30 00:06:22,994 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1195 states to 848 states and 1007 transitions. [2020-11-30 00:06:22,994 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 346 [2020-11-30 00:06:22,995 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 378 [2020-11-30 00:06:22,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 848 states and 1007 transitions. [2020-11-30 00:06:22,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:06:22,996 INFO L691 BuchiCegarLoop]: Abstraction has 848 states and 1007 transitions. [2020-11-30 00:06:22,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states and 1007 transitions. [2020-11-30 00:06:23,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 816. [2020-11-30 00:06:23,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 816 states. [2020-11-30 00:06:23,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 960 transitions. [2020-11-30 00:06:23,018 INFO L714 BuchiCegarLoop]: Abstraction has 816 states and 960 transitions. [2020-11-30 00:06:23,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:06:23,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-30 00:06:23,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-11-30 00:06:23,019 INFO L87 Difference]: Start difference. First operand 816 states and 960 transitions. Second operand 20 states. [2020-11-30 00:06:23,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:06:23,607 INFO L93 Difference]: Finished difference Result 599 states and 699 transitions. [2020-11-30 00:06:23,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-30 00:06:23,607 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 599 states and 699 transitions. [2020-11-30 00:06:23,611 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 21 [2020-11-30 00:06:23,616 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 599 states to 585 states and 682 transitions. [2020-11-30 00:06:23,617 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 297 [2020-11-30 00:06:23,617 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 311 [2020-11-30 00:06:23,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 585 states and 682 transitions. [2020-11-30 00:06:23,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:06:23,618 INFO L691 BuchiCegarLoop]: Abstraction has 585 states and 682 transitions. [2020-11-30 00:06:23,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states and 682 transitions. [2020-11-30 00:06:23,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 571. [2020-11-30 00:06:23,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2020-11-30 00:06:23,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 667 transitions. [2020-11-30 00:06:23,634 INFO L714 BuchiCegarLoop]: Abstraction has 571 states and 667 transitions. [2020-11-30 00:06:23,634 INFO L594 BuchiCegarLoop]: Abstraction has 571 states and 667 transitions. [2020-11-30 00:06:23,635 INFO L427 BuchiCegarLoop]: ======== Iteration 13============ [2020-11-30 00:06:23,635 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 571 states and 667 transitions. [2020-11-30 00:06:23,637 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 21 [2020-11-30 00:06:23,637 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:06:23,638 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:06:23,638 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [7, 7, 7, 6, 6, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:06:23,639 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:06:23,639 INFO L794 eck$LassoCheckResult]: Stem: 55349#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 55348#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 55318#L39 call main_#t~ret11 := fibo1(main_~x~0);< 55319#fibo1ENTRY ~n := #in~n; 55423#L10 assume !(~n < 1); 55421#L12 assume !(1 == ~n); 55414#L15 call #t~ret7 := fibo2(~n - 1);< 55420#fibo2ENTRY ~n := #in~n; 55448#L20 assume !(~n < 1); 55447#L22 assume !(1 == ~n); 55413#L25 call #t~ret9 := fibo1(~n - 1);< 55415#fibo1ENTRY ~n := #in~n; 55667#L10 assume !(~n < 1); 55666#L12 assume !(1 == ~n); 55410#L15 call #t~ret7 := fibo2(~n - 1);< 55491#fibo2ENTRY ~n := #in~n; 55640#L20 assume !(~n < 1); 55637#L22 assume !(1 == ~n); 55475#L25 call #t~ret9 := fibo1(~n - 1);< 55477#fibo1ENTRY ~n := #in~n; 55523#L10 assume !(~n < 1); 55521#L12 assume !(1 == ~n); 55515#L15 call #t~ret7 := fibo2(~n - 1);< 55516#fibo2ENTRY ~n := #in~n; 55616#L20 assume !(~n < 1); 55613#L22 assume !(1 == ~n); 55476#L25 call #t~ret9 := fibo1(~n - 1);< 55477#fibo1ENTRY ~n := #in~n; 55527#L10 assume !(~n < 1); 55618#L12 assume !(1 == ~n); 55577#L15 call #t~ret7 := fibo2(~n - 1);< 55578#fibo2ENTRY ~n := #in~n; 55604#L20 assume !(~n < 1); 55603#L22 assume 1 == ~n;#res := 1; 55600#fibo2FINAL assume true; 55576#fibo2EXIT >#52#return; 55570#L15-1 call #t~ret8 := fibo2(~n - 2);< 55571#fibo2ENTRY ~n := #in~n; 55608#L20 assume ~n < 1;#res := 0; 55605#fibo2FINAL assume true; 55569#fibo2EXIT >#54#return; 55567#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 55565#fibo1FINAL assume true; 55563#fibo1EXIT >#48#return; 55525#L25-1 call #t~ret10 := fibo1(~n - 2);< 55526#fibo1ENTRY ~n := #in~n; 55611#L10 assume !(~n < 1); 55609#L12 assume 1 == ~n;#res := 1; 55560#fibo1FINAL assume true; 55524#fibo1EXIT >#50#return; 55522#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 55520#fibo2FINAL assume true; 55514#fibo2EXIT >#52#return; 55498#L15-1 call #t~ret8 := fibo2(~n - 2);< 55508#fibo2ENTRY ~n := #in~n; 55507#L20 assume !(~n < 1); 55506#L22 assume !(1 == ~n); 55470#L25 call #t~ret9 := fibo1(~n - 1);< 55471#fibo1ENTRY ~n := #in~n; 55610#L10 assume !(~n < 1); 55606#L12 assume !(1 == ~n); 55558#L15 call #t~ret7 := fibo2(~n - 1);< 55559#fibo2ENTRY ~n := #in~n; 55712#L20 assume !(~n < 1); 55837#L22 assume !(1 == ~n); 55529#L25 call #t~ret9 := fibo1(~n - 1);< 55536#fibo1ENTRY ~n := #in~n; 55621#L10 assume !(~n < 1); 55620#L12 assume !(1 == ~n); 55294#L15 [2020-11-30 00:06:23,639 INFO L796 eck$LassoCheckResult]: Loop: 55294#L15 call #t~ret7 := fibo2(~n - 1);< 55590#fibo2ENTRY ~n := #in~n; 55597#L20 assume !(~n < 1); 55838#L22 assume !(1 == ~n); 55531#L25 call #t~ret9 := fibo1(~n - 1);< 55536#fibo1ENTRY ~n := #in~n; 55621#L10 assume !(~n < 1); 55620#L12 assume !(1 == ~n); 55294#L15 [2020-11-30 00:06:23,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:06:23,640 INFO L82 PathProgramCache]: Analyzing trace with hash 265386094, now seen corresponding path program 2 times [2020-11-30 00:06:23,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:06:23,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810262969] [2020-11-30 00:06:23,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:06:23,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:23,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-11-30 00:06:23,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:23,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:06:23,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:23,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 00:06:23,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:23,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-30 00:06:23,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:23,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-11-30 00:06:23,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:23,888 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 92 proven. 39 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-30 00:06:23,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810262969] [2020-11-30 00:06:23,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091297233] [2020-11-30 00:06:23,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:06:23,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 00:06:23,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:06:23,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-30 00:06:23,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:06:24,042 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 92 proven. 39 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-30 00:06:24,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:06:24,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 20 [2020-11-30 00:06:24,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691011891] [2020-11-30 00:06:24,042 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-30 00:06:24,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:06:24,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1544065082, now seen corresponding path program 4 times [2020-11-30 00:06:24,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:06:24,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424276740] [2020-11-30 00:06:24,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:06:24,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:06:24,045 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:06:24,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:06:24,046 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:06:24,046 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:06:24,223 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:06:24,223 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:06:24,223 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:06:24,223 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:06:24,223 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-30 00:06:24,223 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:06:24,223 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:06:24,224 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:06:24,224 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration13_Loop [2020-11-30 00:06:24,224 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:06:24,224 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:06:24,224 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:24,236 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:24,238 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:24,241 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:24,244 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:24,246 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:24,254 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:24,257 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:24,261 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:24,354 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:06:24,354 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 119 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 119 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:06:24,356 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:06:24,356 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 120 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 120 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:06:24,386 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-30 00:06:24,386 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:06:25,844 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-30 00:06:25,845 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:06:25,846 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:06:25,846 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:06:25,846 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:06:25,846 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-30 00:06:25,846 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:06:25,846 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:06:25,846 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:06:25,846 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration13_Loop [2020-11-30 00:06:25,846 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:06:25,846 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:06:25,847 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:25,850 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:25,853 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:25,856 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:25,859 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:25,867 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:25,870 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:25,873 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:25,876 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:06:25,971 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:06:25,971 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 121 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 121 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:06:25,973 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-30 00:06:25,974 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:06:25,974 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:06:25,975 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:06:25,975 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:06:25,975 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:06:25,975 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:06:25,975 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:06:25,976 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 122 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 122 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:06:26,000 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 [2020-11-30 00:06:26,002 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:06:26,002 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:06:26,002 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:06:26,002 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:06:26,002 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:06:26,009 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:06:26,009 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:06:26,010 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 123 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 123 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:06:26,036 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-30 00:06:26,037 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:06:26,037 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:06:26,038 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:06:26,038 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:06:26,038 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:06:26,038 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:06:26,038 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:06:26,040 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 124 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 124 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:06:26,066 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 [2020-11-30 00:06:26,068 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:06:26,068 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:06:26,068 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:06:26,068 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:06:26,068 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:06:26,069 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:06:26,069 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:06:26,070 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 125 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 125 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:06:26,097 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 [2020-11-30 00:06:26,099 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:06:26,099 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:06:26,099 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:06:26,099 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:06:26,099 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:06:26,100 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:06:26,100 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:06:26,101 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 126 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 126 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:06:26,128 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 [2020-11-30 00:06:26,129 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:06:26,129 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:06:26,130 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:06:26,130 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:06:26,130 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:06:26,130 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:06:26,130 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:06:26,132 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 127 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 127 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:06:26,160 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 [2020-11-30 00:06:26,162 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:06:26,162 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:06:26,162 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:06:26,162 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:06:26,162 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:06:26,163 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:06:26,163 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:06:26,164 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 128 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 128 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:06:26,193 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 [2020-11-30 00:06:26,195 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:06:26,195 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:06:26,195 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:06:26,195 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:06:26,195 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:06:26,196 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:06:26,196 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:06:26,197 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 129 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 129 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:06:26,225 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 [2020-11-30 00:06:26,226 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:06:26,226 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:06:26,227 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:06:26,227 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:06:26,227 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:06:26,228 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:06:26,228 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:06:26,230 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-30 00:06:26,234 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-30 00:06:26,234 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_2ee37174-17ef-4f6f-b7be-15d2e81d1881/bin/uautomizer/z3 Starting monitored process 130 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:06:26,236 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-30 00:06:26,236 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-30 00:06:26,237 INFO L510 LassoAnalysis]: Proved termination. [2020-11-30 00:06:26,237 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 130 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:06:26,262 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-30 00:06:26,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:06:26,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:26,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-30 00:06:26,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:06:26,411 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:06:26,413 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:06:26,415 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:06:26,417 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:06:26,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:26,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 00:06:26,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:06:26,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:06:26,552 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 [2020-11-30 00:06:26,552 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 571 states and 667 transitions. cyclomatic complexity: 102 Second operand 8 states. [2020-11-30 00:06:26,742 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 571 states and 667 transitions. cyclomatic complexity: 102. Second operand 8 states. Result 601 states and 698 transitions. Complement of second has 19 states. [2020-11-30 00:06:26,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2020-11-30 00:06:26,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-30 00:06:26,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 20 transitions. [2020-11-30 00:06:26,744 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 20 transitions. Stem has 69 letters. Loop has 8 letters. [2020-11-30 00:06:26,744 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:06:26,744 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-30 00:06:26,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:06:26,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:26,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-30 00:06:26,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:06:26,925 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:06:26,928 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:06:26,929 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:06:26,932 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:06:26,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:26,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 00:06:26,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:06:27,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:06:27,069 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 [2020-11-30 00:06:27,069 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 571 states and 667 transitions. cyclomatic complexity: 102 Second operand 8 states. [2020-11-30 00:06:27,258 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 571 states and 667 transitions. cyclomatic complexity: 102. Second operand 8 states. Result 601 states and 698 transitions. Complement of second has 21 states. [2020-11-30 00:06:27,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2020-11-30 00:06:27,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-30 00:06:27,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 19 transitions. [2020-11-30 00:06:27,260 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 19 transitions. Stem has 69 letters. Loop has 8 letters. [2020-11-30 00:06:27,260 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:06:27,260 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-30 00:06:27,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:06:27,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:27,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-30 00:06:27,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:06:27,463 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:06:27,465 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:06:27,467 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:06:27,469 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:06:27,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:06:27,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 00:06:27,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:06:27,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:06:27,594 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 [2020-11-30 00:06:27,595 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 571 states and 667 transitions. cyclomatic complexity: 102 Second operand 8 states. [2020-11-30 00:06:27,860 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 571 states and 667 transitions. cyclomatic complexity: 102. Second operand 8 states. Result 867 states and 975 transitions. Complement of second has 33 states. [2020-11-30 00:06:27,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2020-11-30 00:06:27,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-30 00:06:27,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 43 transitions. [2020-11-30 00:06:27,862 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 69 letters. Loop has 8 letters. [2020-11-30 00:06:27,863 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:06:27,863 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 77 letters. Loop has 8 letters. [2020-11-30 00:06:27,867 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:06:27,867 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 69 letters. Loop has 16 letters. [2020-11-30 00:06:27,868 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:06:27,868 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 867 states and 975 transitions. [2020-11-30 00:06:27,874 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 21 [2020-11-30 00:06:27,881 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 867 states to 598 states and 691 transitions. [2020-11-30 00:06:27,881 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 281 [2020-11-30 00:06:27,882 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 311 [2020-11-30 00:06:27,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 598 states and 691 transitions. [2020-11-30 00:06:27,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:06:27,882 INFO L691 BuchiCegarLoop]: Abstraction has 598 states and 691 transitions. [2020-11-30 00:06:27,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states and 691 transitions. [2020-11-30 00:06:27,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 591. [2020-11-30 00:06:27,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2020-11-30 00:06:27,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 683 transitions. [2020-11-30 00:06:27,901 INFO L714 BuchiCegarLoop]: Abstraction has 591 states and 683 transitions. [2020-11-30 00:06:27,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:06:27,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-30 00:06:27,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-11-30 00:06:27,902 INFO L87 Difference]: Start difference. First operand 591 states and 683 transitions. Second operand 20 states. [2020-11-30 00:06:28,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:06:28,446 INFO L93 Difference]: Finished difference Result 605 states and 685 transitions. [2020-11-30 00:06:28,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-30 00:06:28,446 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 605 states and 685 transitions. [2020-11-30 00:06:28,450 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-30 00:06:28,450 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 605 states to 0 states and 0 transitions. [2020-11-30 00:06:28,451 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-11-30 00:06:28,451 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-11-30 00:06:28,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-11-30 00:06:28,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-30 00:06:28,451 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 00:06:28,451 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 00:06:28,452 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 00:06:28,452 INFO L427 BuchiCegarLoop]: ======== Iteration 14============ [2020-11-30 00:06:28,452 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-11-30 00:06:28,452 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-30 00:06:28,452 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-11-30 00:06:28,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 30.11 12:06:28 BoogieIcfgContainer [2020-11-30 00:06:28,459 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-30 00:06:28,460 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 00:06:28,460 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 00:06:28,461 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 00:06:28,461 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:05:38" (3/4) ... [2020-11-30 00:06:28,464 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-30 00:06:28,464 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 00:06:28,465 INFO L168 Benchmark]: Toolchain (without parser) took 50862.24 ms. Allocated memory was 83.9 MB in the beginning and 339.7 MB in the end (delta: 255.9 MB). Free memory was 53.6 MB in the beginning and 188.5 MB in the end (delta: -134.9 MB). Peak memory consumption was 121.7 MB. Max. memory is 16.1 GB. [2020-11-30 00:06:28,465 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 83.9 MB. Free memory is still 45.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:06:28,465 INFO L168 Benchmark]: CACSL2BoogieTranslator took 305.93 ms. Allocated memory is still 83.9 MB. Free memory was 53.4 MB in the beginning and 61.8 MB in the end (delta: -8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 00:06:28,465 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.43 ms. Allocated memory is still 83.9 MB. Free memory was 61.8 MB in the beginning and 60.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:06:28,466 INFO L168 Benchmark]: Boogie Preprocessor took 37.04 ms. Allocated memory is still 83.9 MB. Free memory was 60.3 MB in the beginning and 59.5 MB in the end (delta: 777.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:06:28,466 INFO L168 Benchmark]: RCFGBuilder took 630.93 ms. Allocated memory is still 83.9 MB. Free memory was 59.3 MB in the beginning and 47.2 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-30 00:06:28,467 INFO L168 Benchmark]: BuchiAutomizer took 49818.20 ms. Allocated memory was 83.9 MB in the beginning and 339.7 MB in the end (delta: 255.9 MB). Free memory was 47.2 MB in the beginning and 188.5 MB in the end (delta: -141.3 MB). Peak memory consumption was 116.4 MB. Max. memory is 16.1 GB. [2020-11-30 00:06:28,467 INFO L168 Benchmark]: Witness Printer took 3.80 ms. Allocated memory is still 339.7 MB. Free memory is still 188.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:06:28,469 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 83.9 MB. Free memory is still 45.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 305.93 ms. Allocated memory is still 83.9 MB. Free memory was 53.4 MB in the beginning and 61.8 MB in the end (delta: -8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.43 ms. Allocated memory is still 83.9 MB. Free memory was 61.8 MB in the beginning and 60.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.04 ms. Allocated memory is still 83.9 MB. Free memory was 60.3 MB in the beginning and 59.5 MB in the end (delta: 777.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 630.93 ms. Allocated memory is still 83.9 MB. Free memory was 59.3 MB in the beginning and 47.2 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 49818.20 ms. Allocated memory was 83.9 MB in the beginning and 339.7 MB in the end (delta: 255.9 MB). Free memory was 47.2 MB in the beginning and 188.5 MB in the end (delta: -141.3 MB). Peak memory consumption was 116.4 MB. Max. memory is 16.1 GB. * Witness Printer took 3.80 ms. Allocated memory is still 339.7 MB. Free memory is still 188.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 20 terminating modules (12 trivial, 3 deterministic, 5 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 7 locations. One deterministic module has affine ranking function n and consists of 12 locations. One deterministic module has affine ranking function n and consists of 12 locations. One nondeterministic module has affine ranking function \old(n) and consists of 8 locations. One nondeterministic module has affine ranking function n and consists of 12 locations. One nondeterministic module has affine ranking function \old(n) and consists of 11 locations. One nondeterministic module has affine ranking function n and consists of 8 locations. One nondeterministic module has affine ranking function n and consists of 8 locations. 12 modules have a trivial ranking function, the largest among these consists of 24 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 49.7s and 14 iterations. TraceHistogramMax:10. Analysis of lassos took 26.8s. Construction of modules took 6.2s. Büchi inclusion checks took 14.7s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 19. Automata minimization 0.8s AutomataMinimizationTime, 19 MinimizatonAttempts, 1733 StatesRemovedByMinimization, 19 NontrivialMinimizations. Non-live state removal took 0.6s Buchi closure took 0.0s. Biggest automaton had 3231 states and ocurred in iteration 7. Nontrivial modules had stage [3, 0, 4, 1, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 1/22 HoareTripleCheckerStatistics: 726 SDtfs, 1820 SDslu, 2182 SDs, 0 SdLazy, 5288 SolverSat, 1060 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.2s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI5 SILT7 lasso0 LassoPreprocessingBenchmarks: Lassos: inital21 mio100 ax100 hnf82 lsp92 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq188 hnf93 smp75 dnf100 smp100 tf109 neg96 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 33ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 33 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 8 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 11.6s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...