./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 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt --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 0.2.1-dev-4e77c04 [2021-10-13 00:05:04,904 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 00:05:04,908 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 00:05:04,982 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 00:05:04,983 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 00:05:04,990 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 00:05:04,994 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 00:05:05,000 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 00:05:05,004 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 00:05:05,013 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 00:05:05,015 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 00:05:05,018 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 00:05:05,018 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 00:05:05,022 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 00:05:05,025 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 00:05:05,029 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 00:05:05,031 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 00:05:05,033 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 00:05:05,040 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 00:05:05,052 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 00:05:05,056 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 00:05:05,058 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 00:05:05,062 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 00:05:05,064 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 00:05:05,069 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 00:05:05,070 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 00:05:05,070 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 00:05:05,073 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 00:05:05,074 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 00:05:05,076 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 00:05:05,076 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 00:05:05,078 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 00:05:05,080 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 00:05:05,082 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 00:05:05,084 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 00:05:05,085 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 00:05:05,085 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 00:05:05,086 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 00:05:05,086 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 00:05:05,088 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 00:05:05,088 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 00:05:05,090 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-10-13 00:05:05,158 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 00:05:05,160 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 00:05:05,161 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 00:05:05,162 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 00:05:05,164 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 00:05:05,164 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 00:05:05,164 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 00:05:05,165 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-10-13 00:05:05,165 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-10-13 00:05:05,165 INFO L138 SettingsManager]: * Use old map elimination=false [2021-10-13 00:05:05,167 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-10-13 00:05:05,167 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-10-13 00:05:05,167 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-10-13 00:05:05,168 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 00:05:05,168 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 00:05:05,168 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 00:05:05,168 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 00:05:05,169 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 00:05:05,169 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 00:05:05,169 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-10-13 00:05:05,170 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-10-13 00:05:05,170 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-10-13 00:05:05,170 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 00:05:05,171 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 00:05:05,171 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-10-13 00:05:05,171 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 00:05:05,173 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-10-13 00:05:05,174 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 00:05:05,174 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 00:05:05,174 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 00:05:05,175 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 00:05:05,175 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 00:05:05,176 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-10-13 00:05:05,177 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_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f63c6229f0a09709710be77b7ac5a08c2c6f5392 [2021-10-13 00:05:05,524 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 00:05:05,550 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 00:05:05,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 00:05:05,555 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 00:05:05,556 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 00:05:05,557 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c [2021-10-13 00:05:05,654 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/data/268458710/320f48f398484eb5a4e285318c038151/FLAG2f5cc766d [2021-10-13 00:05:06,324 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 00:05:06,325 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c [2021-10-13 00:05:06,340 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/data/268458710/320f48f398484eb5a4e285318c038151/FLAG2f5cc766d [2021-10-13 00:05:06,670 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/data/268458710/320f48f398484eb5a4e285318c038151 [2021-10-13 00:05:06,673 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 00:05:06,675 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 00:05:06,677 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 00:05:06,677 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 00:05:06,695 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 00:05:06,696 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:05:06" (1/1) ... [2021-10-13 00:05:06,697 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5996ea07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:06, skipping insertion in model container [2021-10-13 00:05:06,697 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:05:06" (1/1) ... [2021-10-13 00:05:06,705 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 00:05:06,721 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 00:05:07,006 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c[947,960] [2021-10-13 00:05:07,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:05:07,022 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 00:05:07,044 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c[947,960] [2021-10-13 00:05:07,048 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:05:07,068 INFO L208 MainTranslator]: Completed translation [2021-10-13 00:05:07,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:07 WrapperNode [2021-10-13 00:05:07,069 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 00:05:07,071 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 00:05:07,071 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 00:05:07,071 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 00:05:07,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:07" (1/1) ... [2021-10-13 00:05:07,090 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:07" (1/1) ... [2021-10-13 00:05:07,112 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 00:05:07,113 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 00:05:07,113 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 00:05:07,113 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 00:05:07,123 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:07" (1/1) ... [2021-10-13 00:05:07,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:07" (1/1) ... [2021-10-13 00:05:07,137 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:07" (1/1) ... [2021-10-13 00:05:07,137 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:07" (1/1) ... [2021-10-13 00:05:07,142 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:07" (1/1) ... [2021-10-13 00:05:07,147 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:07" (1/1) ... [2021-10-13 00:05:07,154 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:07" (1/1) ... [2021-10-13 00:05:07,156 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 00:05:07,158 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 00:05:07,158 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 00:05:07,158 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 00:05:07,161 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:07" (1/1) ... [2021-10-13 00:05:07,170 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:07,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:07,204 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:07,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-10-13 00:05:07,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 00:05:07,267 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2021-10-13 00:05:07,267 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2021-10-13 00:05:07,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 00:05:07,268 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2021-10-13 00:05:07,268 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2021-10-13 00:05:07,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 00:05:07,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 00:05:07,566 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 00:05:07,582 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-13 00:05:07,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:05:07 BoogieIcfgContainer [2021-10-13 00:05:07,585 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 00:05:07,586 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-10-13 00:05:07,587 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-10-13 00:05:07,591 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-10-13 00:05:07,592 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-13 00:05:07,592 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 13.10 12:05:06" (1/3) ... [2021-10-13 00:05:07,595 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@66353091 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 13.10 12:05:07, skipping insertion in model container [2021-10-13 00:05:07,610 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-13 00:05:07,610 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:07" (2/3) ... [2021-10-13 00:05:07,611 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@66353091 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 13.10 12:05:07, skipping insertion in model container [2021-10-13 00:05:07,611 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-13 00:05:07,611 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:05:07" (3/3) ... [2021-10-13 00:05:07,613 INFO L389 chiAutomizerObserver]: Analyzing ICFG fibo_2calls_8-2.c [2021-10-13 00:05:07,683 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-10-13 00:05:07,683 INFO L360 BuchiCegarLoop]: Hoare is false [2021-10-13 00:05:07,683 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-10-13 00:05:07,683 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-13 00:05:07,683 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-13 00:05:07,684 INFO L364 BuchiCegarLoop]: Difference is false [2021-10-13 00:05:07,684 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-13 00:05:07,684 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-10-13 00:05:07,702 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 26 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-13 00:05:07,758 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2021-10-13 00:05:07,770 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:05:07,771 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:05:07,779 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-10-13 00:05:07,779 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:05:07,780 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-10-13 00:05:07,780 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 26 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-13 00:05:07,784 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2021-10-13 00:05:07,785 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:05:07,785 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:05:07,786 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-10-13 00:05:07,789 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:05:07,797 INFO L791 eck$LassoCheckResult]: Stem: 16#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); 7#L-1true havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 15#L39true call main_#t~ret11 := fibo1(main_~x~0);< 5#fibo1ENTRYtrue [2021-10-13 00:05:07,800 INFO L793 eck$LassoCheckResult]: Loop: 5#fibo1ENTRYtrue ~n := #in~n; 9#L10true assume !(~n < 1); 8#L12true assume !(1 == ~n); 10#L15true call #t~ret7 := fibo2(~n - 1);< 14#fibo2ENTRYtrue ~n := #in~n; 12#L20true assume !(~n < 1); 17#L22true assume !(1 == ~n); 23#L25true call #t~ret9 := fibo1(~n - 1);< 5#fibo1ENTRYtrue [2021-10-13 00:05:07,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:07,814 INFO L82 PathProgramCache]: Analyzing trace with hash 29896, now seen corresponding path program 1 times [2021-10-13 00:05:07,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:05:07,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365627947] [2021-10-13 00:05:07,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:07,829 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:05:07,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:05:07,974 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:05:08,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:05:08,054 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:05:08,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:08,059 INFO L82 PathProgramCache]: Analyzing trace with hash 181289832, now seen corresponding path program 1 times [2021-10-13 00:05:08,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:05:08,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773257524] [2021-10-13 00:05:08,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:08,062 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:05:08,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:05:08,081 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:05:08,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:05:08,105 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:05:08,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:08,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1313669423, now seen corresponding path program 1 times [2021-10-13 00:05:08,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:05:08,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405823898] [2021-10-13 00:05:08,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:08,111 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:05:08,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:05:08,161 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:05:08,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:05:08,204 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:05:08,506 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:05:08,507 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:05:08,507 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:05:08,507 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:05:08,508 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-13 00:05:08,508 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:08,508 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:05:08,508 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:05:08,508 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration1_Loop [2021-10-13 00:05:08,509 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:05:08,509 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:05:08,542 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:08,549 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:08,551 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:08,554 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:08,557 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:08,560 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:08,562 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:08,565 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:08,568 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:08,578 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:08,655 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:05:08,656 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-13 00:05:08,659 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:08,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:08,674 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:08,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-10-13 00:05:08,689 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:05:08,689 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:05:08,718 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:05:08,718 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:05:08,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:08,763 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:08,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:08,764 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:08,771 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:05:08,772 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:05:08,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-10-13 00:05:08,796 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:05:08,796 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:05:08,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:08,843 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:08,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:08,847 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:08,859 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:05:08,859 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:05:08,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-10-13 00:05:08,894 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:05:08,895 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#in~n=0} Honda state: {fibo2_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:05:08,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:08,939 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:08,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:08,941 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:08,949 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:05:08,949 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:05:08,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-10-13 00:05:08,978 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:05:08,979 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret7=0} Honda state: {fibo1_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:05:09,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:09,022 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:09,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:09,024 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:09,031 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:05:09,032 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:05:09,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-10-13 00:05:09,058 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:05:09,059 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret8=0} Honda state: {fibo1_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:05:09,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:09,105 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:09,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:09,107 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:09,114 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:05:09,115 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:05:09,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-10-13 00:05:09,143 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:05:09,143 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_~n=0} Honda state: {fibo2_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:05:09,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:09,190 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:09,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:09,192 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:09,204 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:05:09,204 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:05:09,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-10-13 00:05:09,230 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:05:09,230 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:05:09,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:09,273 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:09,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:09,275 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:09,281 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:05:09,281 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:05:09,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-10-13 00:05:09,310 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:05:09,311 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret9=0} Honda state: {fibo2_#t~ret9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:05:09,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:09,351 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:09,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:09,352 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:09,359 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:05:09,359 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:05:09,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-10-13 00:05:09,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:09,427 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:09,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:09,430 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:09,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-10-13 00:05:09,436 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-13 00:05:09,436 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:05:09,507 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-13 00:05:09,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:09,510 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:05:09,510 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:05:09,510 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:05:09,510 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:05:09,511 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-13 00:05:09,511 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:09,511 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:05:09,511 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:05:09,511 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration1_Loop [2021-10-13 00:05:09,511 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:05:09,511 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:05:09,514 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:09,523 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:09,527 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:09,530 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:09,533 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:09,539 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:09,543 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:09,546 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:09,551 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:09,563 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:09,651 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:05:09,657 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-13 00:05:09,659 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:09,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:09,660 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:09,670 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 00:05:09,682 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:05:09,682 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:05:09,683 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:05:09,683 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:05:09,683 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:05:09,686 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:05:09,687 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:05:09,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-10-13 00:05:09,699 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:05:09,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:09,737 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:09,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:09,743 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:09,749 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 00:05:09,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-10-13 00:05:09,760 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:05:09,760 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:05:09,760 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:05:09,760 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:05:09,760 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:05:09,761 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:05:09,761 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:05:09,766 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:05:09,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Ended with exit code 0 [2021-10-13 00:05:09,789 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:09,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:09,794 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:09,800 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 00:05:09,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-10-13 00:05:09,809 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:05:09,809 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:05:09,810 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:05:09,810 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:05:09,810 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:05:09,813 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:05:09,814 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:05:09,815 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:05:09,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:09,845 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:09,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:09,846 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:09,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-10-13 00:05:09,852 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 00:05:09,860 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:05:09,860 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:05:09,860 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:05:09,861 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:05:09,861 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:05:09,861 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:05:09,861 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:05:09,865 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:05:09,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:09,889 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:09,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:09,890 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:09,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-10-13 00:05:09,893 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 00:05:09,902 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:05:09,902 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:05:09,902 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:05:09,903 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:05:09,903 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:05:09,904 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:05:09,904 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:05:09,924 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:05:09,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:09,949 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:09,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:09,950 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:09,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-10-13 00:05:09,952 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 00:05:09,961 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:05:09,962 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:05:09,962 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:05:09,962 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:05:09,962 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:05:09,963 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:05:09,963 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:05:09,965 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:05:09,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Ended with exit code 0 [2021-10-13 00:05:09,992 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:09,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:09,993 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:09,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-10-13 00:05:09,995 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 00:05:10,003 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:05:10,003 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:05:10,004 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:05:10,004 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:05:10,004 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:05:10,006 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:05:10,006 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:05:10,013 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:05:10,036 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Ended with exit code 0 [2021-10-13 00:05:10,036 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:10,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:10,059 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:10,061 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 00:05:10,072 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:05:10,073 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:05:10,073 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:05:10,073 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:05:10,073 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:05:10,074 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:05:10,074 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:05:10,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-10-13 00:05:10,094 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:05:10,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:10,126 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:10,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:10,127 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:10,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-10-13 00:05:10,135 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 00:05:10,144 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:05:10,144 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:05:10,145 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:05:10,145 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:05:10,145 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:05:10,146 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:05:10,146 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:05:10,154 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-13 00:05:10,157 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-10-13 00:05:10,157 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-10-13 00:05:10,159 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:10,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:10,160 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:10,187 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-13 00:05:10,187 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-13 00:05:10,187 INFO L513 LassoAnalysis]: Proved termination. [2021-10-13 00:05:10,188 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_#in~n) = 1*fibo1_#in~n Supporting invariants [] [2021-10-13 00:05:10,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2021-10-13 00:05:10,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:10,216 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-13 00:05:10,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:10,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:10,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 00:05:10,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:05:10,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:10,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 00:05:10,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:05:10,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:05:10,471 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 [2021-10-13 00:05:10,473 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 26 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:05:10,704 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 26 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5). Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 84 states and 116 transitions. Complement of second has 24 states. [2021-10-13 00:05:10,705 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 [2021-10-13 00:05:10,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:05:10,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 21 transitions. [2021-10-13 00:05:10,711 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 3 letters. Loop has 8 letters. [2021-10-13 00:05:10,712 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:05:10,712 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 11 letters. Loop has 8 letters. [2021-10-13 00:05:10,713 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:05:10,713 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 3 letters. Loop has 16 letters. [2021-10-13 00:05:10,714 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:05:10,715 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 84 states and 116 transitions. [2021-10-13 00:05:10,740 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2021-10-13 00:05:10,778 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 84 states to 61 states and 82 transitions. [2021-10-13 00:05:10,779 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 39 [2021-10-13 00:05:10,780 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 40 [2021-10-13 00:05:10,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 82 transitions. [2021-10-13 00:05:10,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 00:05:10,782 INFO L681 BuchiCegarLoop]: Abstraction has 61 states and 82 transitions. [2021-10-13 00:05:10,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states and 82 transitions. [2021-10-13 00:05:10,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:10,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2021-10-13 00:05:10,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 38 states have internal predecessors, (47), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (13), 7 states have call predecessors, (13), 10 states have call successors, (13) [2021-10-13 00:05:10,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 72 transitions. [2021-10-13 00:05:10,849 INFO L704 BuchiCegarLoop]: Abstraction has 54 states and 72 transitions. [2021-10-13 00:05:10,849 INFO L587 BuchiCegarLoop]: Abstraction has 54 states and 72 transitions. [2021-10-13 00:05:10,849 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-10-13 00:05:10,852 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 54 states and 72 transitions. [2021-10-13 00:05:10,858 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2021-10-13 00:05:10,858 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:05:10,858 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:05:10,861 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:05:10,861 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:05:10,861 INFO L791 eck$LassoCheckResult]: Stem: 196#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); 197#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 214#L39 call main_#t~ret11 := fibo1(main_~x~0);< 213#fibo1ENTRY ~n := #in~n; 215#L10 assume !(~n < 1); 226#L12 assume !(1 == ~n); 208#L15 call #t~ret7 := fibo2(~n - 1);< 230#fibo2ENTRY ~n := #in~n; 236#L20 assume !(~n < 1); 249#L22 assume !(1 == ~n); 204#L25 call #t~ret9 := fibo1(~n - 1);< 216#fibo1ENTRY ~n := #in~n; 217#L10 assume ~n < 1;#res := 0; 205#fibo1FINAL assume true; 206#fibo1EXIT >#46#return; 207#L25-1 [2021-10-13 00:05:10,862 INFO L793 eck$LassoCheckResult]: Loop: 207#L25-1 call #t~ret10 := fibo1(~n - 2);< 212#fibo1ENTRY ~n := #in~n; 240#L10 assume !(~n < 1); 241#L12 assume !(1 == ~n); 211#L15 call #t~ret7 := fibo2(~n - 1);< 220#fibo2ENTRY ~n := #in~n; 243#L20 assume !(~n < 1); 242#L22 assume !(1 == ~n); 219#L25 call #t~ret9 := fibo1(~n - 1);< 212#fibo1ENTRY ~n := #in~n; 240#L10 assume ~n < 1;#res := 0; 238#fibo1FINAL assume true; 239#fibo1EXIT >#46#return; 207#L25-1 [2021-10-13 00:05:10,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:10,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1888024054, now seen corresponding path program 1 times [2021-10-13 00:05:10,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:05:10,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830025391] [2021-10-13 00:05:10,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:10,866 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:05:10,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:10,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-13 00:05:11,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:11,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:05:11,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:05:11,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830025391] [2021-10-13 00:05:11,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830025391] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:05:11,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:05:11,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 00:05:11,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907389265] [2021-10-13 00:05:11,057 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-13 00:05:11,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:11,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1730504828, now seen corresponding path program 1 times [2021-10-13 00:05:11,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:05:11,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849463021] [2021-10-13 00:05:11,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:11,059 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:05:11,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:11,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-13 00:05:11,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:11,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:05:11,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:05:11,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849463021] [2021-10-13 00:05:11,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849463021] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:05:11,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:05:11,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 00:05:11,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585980524] [2021-10-13 00:05:11,159 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-13 00:05:11,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:05:11,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:05:11,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:05:11,164 INFO L87 Difference]: Start difference. First operand 54 states and 72 transitions. cyclomatic complexity: 20 Second operand has 6 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:05:11,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:05:11,255 INFO L93 Difference]: Finished difference Result 68 states and 88 transitions. [2021-10-13 00:05:11,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:05:11,256 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 68 states and 88 transitions. [2021-10-13 00:05:11,268 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2021-10-13 00:05:11,273 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 68 states to 66 states and 86 transitions. [2021-10-13 00:05:11,273 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 46 [2021-10-13 00:05:11,277 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 46 [2021-10-13 00:05:11,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 86 transitions. [2021-10-13 00:05:11,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 00:05:11,278 INFO L681 BuchiCegarLoop]: Abstraction has 66 states and 86 transitions. [2021-10-13 00:05:11,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states and 86 transitions. [2021-10-13 00:05:11,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2021-10-13 00:05:11,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 38 states have (on average 1.263157894736842) internal successors, (48), 42 states have internal predecessors, (48), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (16), 7 states have call predecessors, (16), 10 states have call successors, (16) [2021-10-13 00:05:11,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2021-10-13 00:05:11,292 INFO L704 BuchiCegarLoop]: Abstraction has 58 states and 76 transitions. [2021-10-13 00:05:11,292 INFO L587 BuchiCegarLoop]: Abstraction has 58 states and 76 transitions. [2021-10-13 00:05:11,292 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-10-13 00:05:11,292 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 58 states and 76 transitions. [2021-10-13 00:05:11,294 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2021-10-13 00:05:11,294 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:05:11,294 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:05:11,295 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:05:11,295 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:05:11,295 INFO L791 eck$LassoCheckResult]: Stem: 341#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); 342#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 360#L39 call main_#t~ret11 := fibo1(main_~x~0);< 359#fibo1ENTRY ~n := #in~n; 361#L10 assume !(~n < 1); 371#L12 assume !(1 == ~n); 354#L15 call #t~ret7 := fibo2(~n - 1);< 378#fibo2ENTRY ~n := #in~n; 382#L20 assume !(~n < 1); 398#L22 assume !(1 == ~n); 349#L25 call #t~ret9 := fibo1(~n - 1);< 362#fibo1ENTRY ~n := #in~n; 363#L10 assume !(~n < 1); 387#L12 assume 1 == ~n;#res := 1; 386#fibo1FINAL assume true; 385#fibo1EXIT >#46#return; 351#L25-1 [2021-10-13 00:05:11,296 INFO L793 eck$LassoCheckResult]: Loop: 351#L25-1 call #t~ret10 := fibo1(~n - 2);< 358#fibo1ENTRY ~n := #in~n; 375#L10 assume !(~n < 1); 369#L12 assume !(1 == ~n); 357#L15 call #t~ret7 := fibo2(~n - 1);< 391#fibo2ENTRY ~n := #in~n; 390#L20 assume !(~n < 1); 388#L22 assume !(1 == ~n); 352#L25 call #t~ret9 := fibo1(~n - 1);< 358#fibo1ENTRY ~n := #in~n; 375#L10 assume !(~n < 1); 369#L12 assume 1 == ~n;#res := 1; 370#fibo1FINAL assume true; 384#fibo1EXIT >#46#return; 351#L25-1 [2021-10-13 00:05:11,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:11,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1600771562, now seen corresponding path program 1 times [2021-10-13 00:05:11,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:05:11,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675462895] [2021-10-13 00:05:11,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:11,297 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:05:11,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:11,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-13 00:05:11,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:11,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:05:11,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:05:11,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675462895] [2021-10-13 00:05:11,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675462895] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:05:11,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135457519] [2021-10-13 00:05:11,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:11,429 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:05:11,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:11,440 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:05:11,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-13 00:05:11,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:11,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 00:05:11,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:05:11,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:05:11,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135457519] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:05:11,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:05:11,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-10-13 00:05:11,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61185168] [2021-10-13 00:05:11,710 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-13 00:05:11,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:11,710 INFO L82 PathProgramCache]: Analyzing trace with hash 2106067024, now seen corresponding path program 1 times [2021-10-13 00:05:11,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:05:11,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76901129] [2021-10-13 00:05:11,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:11,711 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:05:11,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:05:11,730 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:05:11,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:05:11,747 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:05:12,014 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:05:12,014 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:05:12,014 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:05:12,014 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:05:12,014 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-13 00:05:12,014 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:12,015 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:05:12,015 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:05:12,015 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration3_Loop [2021-10-13 00:05:12,015 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:05:12,015 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:05:12,016 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:12,020 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:12,022 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:12,025 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:12,027 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:12,035 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:12,039 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:12,043 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:12,045 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:12,111 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:05:12,111 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-13 00:05:12,111 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:12,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:12,118 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:12,120 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:05:12,120 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:05:12,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2021-10-13 00:05:12,147 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:05:12,147 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret7=0} Honda state: {fibo1_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:05:12,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:12,186 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:12,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:12,191 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:12,193 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:05:12,193 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:05:12,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2021-10-13 00:05:12,214 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:05:12,215 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret8=0} Honda state: {fibo1_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:05:12,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Ended with exit code 0 [2021-10-13 00:05:12,241 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:12,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:12,242 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:12,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2021-10-13 00:05:12,244 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:05:12,244 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:05:12,254 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:05:12,254 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#in~n=0} Honda state: {fibo1_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:05:12,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Ended with exit code 0 [2021-10-13 00:05:12,277 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:12,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:12,278 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:12,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2021-10-13 00:05:12,281 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:05:12,281 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:05:12,290 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:05:12,291 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:05:12,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Ended with exit code 0 [2021-10-13 00:05:12,315 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:12,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:12,316 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:12,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-10-13 00:05:12,317 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:05:12,317 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:05:12,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:12,389 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:12,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:12,391 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:12,397 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-13 00:05:12,397 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:05:12,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-10-13 00:05:13,800 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-13 00:05:13,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:13,806 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:05:13,806 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:05:13,806 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:05:13,807 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:05:13,807 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-13 00:05:13,807 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:13,807 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:05:13,807 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:05:13,807 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration3_Loop [2021-10-13 00:05:13,807 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:05:13,807 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:05:13,809 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:13,812 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:13,827 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:13,830 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:13,838 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:13,846 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:13,849 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:13,851 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:13,854 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:13,912 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:05:13,913 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-13 00:05:13,913 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:13,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:13,915 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:13,924 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 00:05:13,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2021-10-13 00:05:13,934 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:05:13,935 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:05:13,935 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:05:13,935 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:05:13,935 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:05:13,936 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:05:13,936 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:05:13,962 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:05:13,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:13,999 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:13,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:14,000 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:14,003 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 00:05:14,014 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:05:14,014 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:05:14,014 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:05:14,014 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:05:14,014 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:05:14,016 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:05:14,016 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:05:14,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2021-10-13 00:05:14,026 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:05:14,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:14,067 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:14,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:14,068 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:14,071 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 00:05:14,082 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:05:14,082 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:05:14,082 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:05:14,083 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:05:14,083 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:05:14,083 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:05:14,083 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:05:14,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2021-10-13 00:05:14,099 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:05:14,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Ended with exit code 0 [2021-10-13 00:05:14,123 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:14,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:14,124 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:14,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2021-10-13 00:05:14,126 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 00:05:14,135 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:05:14,135 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:05:14,136 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:05:14,136 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:05:14,136 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:05:14,137 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:05:14,137 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:05:14,141 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-13 00:05:14,144 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-10-13 00:05:14,144 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-10-13 00:05:14,144 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:14,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:14,145 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:14,149 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-13 00:05:14,149 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-13 00:05:14,149 INFO L513 LassoAnalysis]: Proved termination. [2021-10-13 00:05:14,149 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_~n) = 1*fibo2_~n Supporting invariants [] [2021-10-13 00:05:14,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2021-10-13 00:05:14,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:14,172 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-13 00:05:14,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:14,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:14,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 00:05:14,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:05:14,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:14,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 00:05:14,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:05:14,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:05:14,669 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 [2021-10-13 00:05:14,670 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 58 states and 76 transitions. cyclomatic complexity: 20 Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 00:05:14,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:15,223 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 58 states and 76 transitions. cyclomatic complexity: 20. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Result 191 states and 263 transitions. Complement of second has 40 states. [2021-10-13 00:05:15,224 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 [2021-10-13 00:05:15,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 00:05:15,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 73 transitions. [2021-10-13 00:05:15,229 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 16 letters. Loop has 14 letters. [2021-10-13 00:05:15,230 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:05:15,230 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 30 letters. Loop has 14 letters. [2021-10-13 00:05:15,233 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:05:15,233 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 16 letters. Loop has 28 letters. [2021-10-13 00:05:15,236 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:05:15,236 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 191 states and 263 transitions. [2021-10-13 00:05:15,249 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2021-10-13 00:05:15,264 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 191 states to 169 states and 237 transitions. [2021-10-13 00:05:15,264 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 103 [2021-10-13 00:05:15,265 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 106 [2021-10-13 00:05:15,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 169 states and 237 transitions. [2021-10-13 00:05:15,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 00:05:15,267 INFO L681 BuchiCegarLoop]: Abstraction has 169 states and 237 transitions. [2021-10-13 00:05:15,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states and 237 transitions. [2021-10-13 00:05:15,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 152. [2021-10-13 00:05:15,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 95 states have (on average 1.2842105263157895) internal successors, (122), 102 states have internal predecessors, (122), 35 states have call successors, (36), 19 states have call predecessors, (36), 22 states have return successors, (48), 30 states have call predecessors, (48), 33 states have call successors, (48) [2021-10-13 00:05:15,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 206 transitions. [2021-10-13 00:05:15,299 INFO L704 BuchiCegarLoop]: Abstraction has 152 states and 206 transitions. [2021-10-13 00:05:15,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:05:15,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 00:05:15,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-13 00:05:15,301 INFO L87 Difference]: Start difference. First operand 152 states and 206 transitions. Second operand has 10 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:05:15,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:05:15,453 INFO L93 Difference]: Finished difference Result 183 states and 244 transitions. [2021-10-13 00:05:15,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 00:05:15,454 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 183 states and 244 transitions. [2021-10-13 00:05:15,460 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2021-10-13 00:05:15,468 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 183 states to 180 states and 240 transitions. [2021-10-13 00:05:15,469 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 117 [2021-10-13 00:05:15,471 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 117 [2021-10-13 00:05:15,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 180 states and 240 transitions. [2021-10-13 00:05:15,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 00:05:15,472 INFO L681 BuchiCegarLoop]: Abstraction has 180 states and 240 transitions. [2021-10-13 00:05:15,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states and 240 transitions. [2021-10-13 00:05:15,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 167. [2021-10-13 00:05:15,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 103 states have (on average 1.2621359223300972) internal successors, (130), 113 states have internal predecessors, (130), 38 states have call successors, (40), 20 states have call predecessors, (40), 26 states have return successors, (55), 33 states have call predecessors, (55), 36 states have call successors, (55) [2021-10-13 00:05:15,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 225 transitions. [2021-10-13 00:05:15,511 INFO L704 BuchiCegarLoop]: Abstraction has 167 states and 225 transitions. [2021-10-13 00:05:15,511 INFO L587 BuchiCegarLoop]: Abstraction has 167 states and 225 transitions. [2021-10-13 00:05:15,511 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-10-13 00:05:15,511 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 167 states and 225 transitions. [2021-10-13 00:05:15,517 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2021-10-13 00:05:15,519 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:05:15,519 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:05:15,529 INFO L842 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] [2021-10-13 00:05:15,529 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2021-10-13 00:05:15,531 INFO L791 eck$LassoCheckResult]: Stem: 1156#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); 1157#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 1185#L39 call main_#t~ret11 := fibo1(main_~x~0);< 1219#fibo1ENTRY ~n := #in~n; 1207#L10 assume !(~n < 1); 1202#L12 assume !(1 == ~n); 1165#L15 call #t~ret7 := fibo2(~n - 1);< 1208#fibo2ENTRY ~n := #in~n; 1215#L20 assume !(~n < 1); 1164#L22 assume !(1 == ~n); 1166#L25 call #t~ret9 := fibo1(~n - 1);< 1189#fibo1ENTRY ~n := #in~n; 1250#L10 assume !(~n < 1); 1249#L12 assume !(1 == ~n); 1188#L15 call #t~ret7 := fibo2(~n - 1);< 1248#fibo2ENTRY ~n := #in~n; 1246#L20 assume !(~n < 1); 1247#L22 assume !(1 == ~n); 1186#L25 call #t~ret9 := fibo1(~n - 1);< 1189#fibo1ENTRY ~n := #in~n; 1250#L10 assume !(~n < 1); 1249#L12 assume !(1 == ~n); 1188#L15 call #t~ret7 := fibo2(~n - 1);< 1248#fibo2ENTRY ~n := #in~n; 1246#L20 assume ~n < 1;#res := 0; 1204#fibo2FINAL assume true; 1205#fibo2EXIT >#50#return; 1187#L15-1 call #t~ret8 := fibo2(~n - 2);< 1191#fibo2ENTRY ~n := #in~n; 1315#L20 assume !(~n < 1); 1314#L22 assume !(1 == ~n); 1186#L25 call #t~ret9 := fibo1(~n - 1);< 1189#fibo1ENTRY ~n := #in~n; 1251#L10 assume !(~n < 1); 1255#L12 assume 1 == ~n;#res := 1; 1256#fibo1FINAL assume true; 1245#fibo1EXIT >#46#return; 1236#L25-1 call #t~ret10 := fibo1(~n - 2);< 1178#fibo1ENTRY ~n := #in~n; 1241#L10 assume !(~n < 1); 1240#L12 assume !(1 == ~n); 1177#L15 call #t~ret7 := fibo2(~n - 1);< 1233#fibo2ENTRY ~n := #in~n; 1231#L20 assume ~n < 1;#res := 0; 1232#fibo2FINAL assume true; 1239#fibo2EXIT >#50#return; 1176#L15-1 call #t~ret8 := fibo2(~n - 2);< 1233#fibo2ENTRY ~n := #in~n; 1231#L20 assume !(~n < 1); 1227#L22 assume 1 == ~n;#res := 1; 1228#fibo2FINAL assume true; 1304#fibo2EXIT >#52#return; 1305#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1317#fibo1FINAL assume true; 1316#fibo1EXIT >#48#return; 1181#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 1309#fibo2FINAL assume true; 1307#fibo2EXIT >#52#return; 1305#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1317#fibo1FINAL assume true; 1316#fibo1EXIT >#46#return; 1180#L25-1 call #t~ret10 := fibo1(~n - 2);< 1174#fibo1ENTRY ~n := #in~n; 1182#L10 assume !(~n < 1); 1200#L12 assume !(1 == ~n); 1160#L15 call #t~ret7 := fibo2(~n - 1);< 1190#fibo2ENTRY ~n := #in~n; 1216#L20 assume ~n < 1;#res := 0; 1162#fibo2FINAL assume true; 1308#fibo2EXIT >#50#return; 1159#L15-1 call #t~ret8 := fibo2(~n - 2);< 1190#fibo2ENTRY ~n := #in~n; 1216#L20 assume ~n < 1;#res := 0; 1162#fibo2FINAL assume true; 1308#fibo2EXIT >#52#return; 1305#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1317#fibo1FINAL assume true; 1316#fibo1EXIT >#48#return; 1181#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 1309#fibo2FINAL assume true; 1307#fibo2EXIT >#50#return; 1159#L15-1 [2021-10-13 00:05:15,531 INFO L793 eck$LassoCheckResult]: Loop: 1159#L15-1 call #t~ret8 := fibo2(~n - 2);< 1190#fibo2ENTRY ~n := #in~n; 1216#L20 assume !(~n < 1); 1158#L22 assume !(1 == ~n); 1163#L25 call #t~ret9 := fibo1(~n - 1);< 1174#fibo1ENTRY ~n := #in~n; 1182#L10 assume !(~n < 1); 1200#L12 assume !(1 == ~n); 1160#L15 call #t~ret7 := fibo2(~n - 1);< 1190#fibo2ENTRY ~n := #in~n; 1216#L20 assume !(~n < 1); 1158#L22 assume !(1 == ~n); 1163#L25 call #t~ret9 := fibo1(~n - 1);< 1174#fibo1ENTRY ~n := #in~n; 1182#L10 assume !(~n < 1); 1200#L12 assume !(1 == ~n); 1160#L15 call #t~ret7 := fibo2(~n - 1);< 1190#fibo2ENTRY ~n := #in~n; 1216#L20 assume ~n < 1;#res := 0; 1162#fibo2FINAL assume true; 1308#fibo2EXIT >#50#return; 1159#L15-1 call #t~ret8 := fibo2(~n - 2);< 1190#fibo2ENTRY ~n := #in~n; 1216#L20 assume ~n < 1;#res := 0; 1162#fibo2FINAL assume true; 1308#fibo2EXIT >#52#return; 1305#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1317#fibo1FINAL assume true; 1316#fibo1EXIT >#46#return; 1180#L25-1 call #t~ret10 := fibo1(~n - 2);< 1174#fibo1ENTRY ~n := #in~n; 1182#L10 assume !(~n < 1); 1200#L12 assume !(1 == ~n); 1160#L15 call #t~ret7 := fibo2(~n - 1);< 1190#fibo2ENTRY ~n := #in~n; 1216#L20 assume ~n < 1;#res := 0; 1162#fibo2FINAL assume true; 1308#fibo2EXIT >#50#return; 1159#L15-1 call #t~ret8 := fibo2(~n - 2);< 1190#fibo2ENTRY ~n := #in~n; 1216#L20 assume ~n < 1;#res := 0; 1162#fibo2FINAL assume true; 1308#fibo2EXIT >#52#return; 1305#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1317#fibo1FINAL assume true; 1316#fibo1EXIT >#48#return; 1181#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 1309#fibo2FINAL assume true; 1307#fibo2EXIT >#50#return; 1159#L15-1 [2021-10-13 00:05:15,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:15,532 INFO L82 PathProgramCache]: Analyzing trace with hash 376035563, now seen corresponding path program 1 times [2021-10-13 00:05:15,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:05:15,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360781252] [2021-10-13 00:05:15,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:15,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:05:15,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:15,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-13 00:05:15,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:15,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:05:15,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:15,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:05:15,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:15,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-13 00:05:15,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:15,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:05:15,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:15,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 00:05:15,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:15,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:05:15,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:15,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-13 00:05:15,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:15,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-10-13 00:05:15,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:15,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:05:15,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:15,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-13 00:05:15,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:15,878 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-10-13 00:05:15,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:05:15,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360781252] [2021-10-13 00:05:15,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360781252] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:05:15,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447753179] [2021-10-13 00:05:15,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:15,880 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:05:15,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:15,891 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:05:15,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-13 00:05:15,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:15,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 00:05:16,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:05:16,370 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 17 proven. 91 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-10-13 00:05:16,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447753179] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:05:16,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:05:16,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13] total 17 [2021-10-13 00:05:16,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281572357] [2021-10-13 00:05:16,373 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-13 00:05:16,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:16,375 INFO L82 PathProgramCache]: Analyzing trace with hash 36254641, now seen corresponding path program 1 times [2021-10-13 00:05:16,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:05:16,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783441268] [2021-10-13 00:05:16,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:16,376 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:05:16,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:16,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-13 00:05:16,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:16,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:05:16,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:16,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:05:16,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:16,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-13 00:05:16,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:16,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-13 00:05:16,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:16,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:05:16,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:16,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-13 00:05:16,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:16,486 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-10-13 00:05:16,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:05:16,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783441268] [2021-10-13 00:05:16,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783441268] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:05:16,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664356618] [2021-10-13 00:05:16,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:16,488 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:05:16,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:16,489 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:05:16,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-13 00:05:16,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:16,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 00:05:16,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:05:16,830 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-13 00:05:16,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664356618] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:05:16,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:05:16,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 12 [2021-10-13 00:05:16,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816534941] [2021-10-13 00:05:16,832 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-13 00:05:16,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:05:16,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 00:05:16,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-10-13 00:05:16,833 INFO L87 Difference]: Start difference. First operand 167 states and 225 transitions. cyclomatic complexity: 63 Second operand has 12 states, 10 states have (on average 3.1) internal successors, (31), 11 states have internal predecessors, (31), 7 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) [2021-10-13 00:05:17,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:05:17,084 INFO L93 Difference]: Finished difference Result 223 states and 293 transitions. [2021-10-13 00:05:17,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 00:05:17,085 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 223 states and 293 transitions. [2021-10-13 00:05:17,088 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2021-10-13 00:05:17,091 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 223 states to 200 states and 262 transitions. [2021-10-13 00:05:17,091 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 134 [2021-10-13 00:05:17,092 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 134 [2021-10-13 00:05:17,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 200 states and 262 transitions. [2021-10-13 00:05:17,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 00:05:17,092 INFO L681 BuchiCegarLoop]: Abstraction has 200 states and 262 transitions. [2021-10-13 00:05:17,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states and 262 transitions. [2021-10-13 00:05:17,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 184. [2021-10-13 00:05:17,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 115 states have (on average 1.182608695652174) internal successors, (136), 125 states have internal predecessors, (136), 38 states have call successors, (39), 24 states have call predecessors, (39), 31 states have return successors, (63), 34 states have call predecessors, (63), 36 states have call successors, (63) [2021-10-13 00:05:17,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 238 transitions. [2021-10-13 00:05:17,107 INFO L704 BuchiCegarLoop]: Abstraction has 184 states and 238 transitions. [2021-10-13 00:05:17,107 INFO L587 BuchiCegarLoop]: Abstraction has 184 states and 238 transitions. [2021-10-13 00:05:17,107 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-10-13 00:05:17,107 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 184 states and 238 transitions. [2021-10-13 00:05:17,111 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2021-10-13 00:05:17,111 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:05:17,112 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:05:17,113 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:05:17,114 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2021-10-13 00:05:17,114 INFO L791 eck$LassoCheckResult]: Stem: 2262#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 2263#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 2297#L39 call main_#t~ret11 := fibo1(main_~x~0);< 2331#fibo1ENTRY ~n := #in~n; 2320#L10 assume !(~n < 1); 2313#L12 assume !(1 == ~n); 2314#L15 call #t~ret7 := fibo2(~n - 1);< 2322#fibo2ENTRY ~n := #in~n; 2403#L20 assume !(~n < 1); 2402#L22 assume !(1 == ~n); 2306#L25 call #t~ret9 := fibo1(~n - 1);< 2345#fibo1ENTRY ~n := #in~n; 2343#L10 assume !(~n < 1); 2342#L12 assume !(1 == ~n); 2317#L15 call #t~ret7 := fibo2(~n - 1);< 2336#fibo2ENTRY ~n := #in~n; 2366#L20 assume !(~n < 1); 2364#L22 assume !(1 == ~n); 2273#L25 call #t~ret9 := fibo1(~n - 1);< 2345#fibo1ENTRY ~n := #in~n; 2346#L10 assume !(~n < 1); 2375#L12 assume 1 == ~n;#res := 1; 2376#fibo1FINAL assume true; 2421#fibo1EXIT >#46#return; 2416#L25-1 call #t~ret10 := fibo1(~n - 2);< 2418#fibo1ENTRY ~n := #in~n; 2422#L10 assume ~n < 1;#res := 0; 2419#fibo1FINAL assume true; 2415#fibo1EXIT >#48#return; 2411#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 2409#fibo2FINAL assume true; 2383#fibo2EXIT >#50#return; 2385#L15-1 [2021-10-13 00:05:17,114 INFO L793 eck$LassoCheckResult]: Loop: 2385#L15-1 call #t~ret8 := fibo2(~n - 2);< 2305#fibo2ENTRY ~n := #in~n; 2405#L20 assume !(~n < 1); 2406#L22 assume !(1 == ~n); 2275#L25 call #t~ret9 := fibo1(~n - 1);< 2396#fibo1ENTRY ~n := #in~n; 2398#L10 assume !(~n < 1); 2392#L12 assume !(1 == ~n); 2387#L15 call #t~ret7 := fibo2(~n - 1);< 2305#fibo2ENTRY ~n := #in~n; 2405#L20 assume !(~n < 1); 2406#L22 assume !(1 == ~n); 2275#L25 call #t~ret9 := fibo1(~n - 1);< 2396#fibo1ENTRY ~n := #in~n; 2398#L10 assume !(~n < 1); 2392#L12 assume !(1 == ~n); 2387#L15 call #t~ret7 := fibo2(~n - 1);< 2305#fibo2ENTRY ~n := #in~n; 2405#L20 assume !(~n < 1); 2406#L22 assume 1 == ~n;#res := 1; 2407#fibo2FINAL assume true; 2390#fibo2EXIT >#50#return; 2385#L15-1 call #t~ret8 := fibo2(~n - 2);< 2305#fibo2ENTRY ~n := #in~n; 2405#L20 assume ~n < 1;#res := 0; 2404#fibo2FINAL assume true; 2401#fibo2EXIT >#52#return; 2384#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 2400#fibo1FINAL assume true; 2393#fibo1EXIT >#46#return; 2276#L25-1 call #t~ret10 := fibo1(~n - 2);< 2396#fibo1ENTRY ~n := #in~n; 2398#L10 assume !(~n < 1); 2392#L12 assume !(1 == ~n); 2387#L15 call #t~ret7 := fibo2(~n - 1);< 2305#fibo2ENTRY ~n := #in~n; 2405#L20 assume !(~n < 1); 2406#L22 assume 1 == ~n;#res := 1; 2407#fibo2FINAL assume true; 2390#fibo2EXIT >#50#return; 2385#L15-1 call #t~ret8 := fibo2(~n - 2);< 2305#fibo2ENTRY ~n := #in~n; 2405#L20 assume ~n < 1;#res := 0; 2404#fibo2FINAL assume true; 2401#fibo2EXIT >#52#return; 2384#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 2400#fibo1FINAL assume true; 2393#fibo1EXIT >#48#return; 2391#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 2388#fibo2FINAL assume true; 2386#fibo2EXIT >#50#return; 2385#L15-1 [2021-10-13 00:05:17,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:17,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1036448488, now seen corresponding path program 1 times [2021-10-13 00:05:17,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:05:17,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641255345] [2021-10-13 00:05:17,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:17,116 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:05:17,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:17,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-13 00:05:17,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:17,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:05:17,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:17,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 00:05:17,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:17,264 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:05:17,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:05:17,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641255345] [2021-10-13 00:05:17,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641255345] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:05:17,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706811608] [2021-10-13 00:05:17,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:17,266 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:05:17,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:17,274 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:05:17,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-13 00:05:17,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:17,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 00:05:17,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:05:17,549 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:05:17,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706811608] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:05:17,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:05:17,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 15 [2021-10-13 00:05:17,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160353429] [2021-10-13 00:05:17,550 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-13 00:05:17,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:17,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1445694181, now seen corresponding path program 1 times [2021-10-13 00:05:17,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:05:17,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185040293] [2021-10-13 00:05:17,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:17,552 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:05:17,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:17,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-13 00:05:17,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:17,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:05:17,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:17,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:05:17,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:17,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 00:05:17,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:17,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-10-13 00:05:17,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:17,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:05:17,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:17,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 00:05:17,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:17,701 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-13 00:05:17,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:05:17,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185040293] [2021-10-13 00:05:17,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185040293] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:05:17,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106767272] [2021-10-13 00:05:17,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:17,703 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:05:17,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:17,707 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:05:17,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-13 00:05:17,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:17,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 00:05:17,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:05:18,084 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-13 00:05:18,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106767272] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:05:18,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:05:18,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-10-13 00:05:18,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286369594] [2021-10-13 00:05:18,086 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-13 00:05:18,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:05:18,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 00:05:18,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-10-13 00:05:18,090 INFO L87 Difference]: Start difference. First operand 184 states and 238 transitions. cyclomatic complexity: 59 Second operand has 16 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-13 00:05:18,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:05:18,382 INFO L93 Difference]: Finished difference Result 206 states and 268 transitions. [2021-10-13 00:05:18,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 00:05:18,382 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 206 states and 268 transitions. [2021-10-13 00:05:18,386 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2021-10-13 00:05:18,393 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 206 states to 203 states and 264 transitions. [2021-10-13 00:05:18,393 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 133 [2021-10-13 00:05:18,393 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 133 [2021-10-13 00:05:18,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 203 states and 264 transitions. [2021-10-13 00:05:18,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 00:05:18,402 INFO L681 BuchiCegarLoop]: Abstraction has 203 states and 264 transitions. [2021-10-13 00:05:18,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states and 264 transitions. [2021-10-13 00:05:18,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 194. [2021-10-13 00:05:18,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 122 states have (on average 1.1721311475409837) internal successors, (143), 132 states have internal predecessors, (143), 39 states have call successors, (40), 25 states have call predecessors, (40), 33 states have return successors, (66), 36 states have call predecessors, (66), 37 states have call successors, (66) [2021-10-13 00:05:18,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 249 transitions. [2021-10-13 00:05:18,427 INFO L704 BuchiCegarLoop]: Abstraction has 194 states and 249 transitions. [2021-10-13 00:05:18,428 INFO L587 BuchiCegarLoop]: Abstraction has 194 states and 249 transitions. [2021-10-13 00:05:18,428 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-10-13 00:05:18,428 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 194 states and 249 transitions. [2021-10-13 00:05:18,430 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2021-10-13 00:05:18,430 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:05:18,431 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:05:18,433 INFO L842 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] [2021-10-13 00:05:18,433 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:05:18,434 INFO L791 eck$LassoCheckResult]: Stem: 3059#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); 3060#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 3092#L39 call main_#t~ret11 := fibo1(main_~x~0);< 3125#fibo1ENTRY ~n := #in~n; 3181#L10 assume !(~n < 1); 3180#L12 assume !(1 == ~n); 3069#L15 call #t~ret7 := fibo2(~n - 1);< 3179#fibo2ENTRY ~n := #in~n; 3118#L20 assume !(~n < 1); 3068#L22 assume !(1 == ~n); 3070#L25 call #t~ret9 := fibo1(~n - 1);< 3086#fibo1ENTRY ~n := #in~n; 3087#L10 assume !(~n < 1); 3109#L12 assume !(1 == ~n); 3110#L15 call #t~ret7 := fibo2(~n - 1);< 3115#fibo2ENTRY ~n := #in~n; 3124#L20 assume !(~n < 1); 3170#L22 assume !(1 == ~n); 3105#L25 call #t~ret9 := fibo1(~n - 1);< 3152#fibo1ENTRY ~n := #in~n; 3153#L10 assume !(~n < 1); 3177#L12 assume !(1 == ~n); 3168#L15 call #t~ret7 := fibo2(~n - 1);< 3169#fibo2ENTRY ~n := #in~n; 3174#L20 assume !(~n < 1); 3172#L22 assume 1 == ~n;#res := 1; 3171#fibo2FINAL assume true; 3167#fibo2EXIT >#50#return; 3165#L15-1 call #t~ret8 := fibo2(~n - 2);< 3166#fibo2ENTRY ~n := #in~n; 3175#L20 assume ~n < 1;#res := 0; 3173#fibo2FINAL assume true; 3164#fibo2EXIT >#52#return; 3163#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 3161#fibo1FINAL assume true; 3155#fibo1EXIT >#46#return; 3146#L25-1 call #t~ret10 := fibo1(~n - 2);< 3154#fibo1ENTRY ~n := #in~n; 3243#L10 assume ~n < 1;#res := 0; 3244#fibo1FINAL assume true; 3238#fibo1EXIT >#48#return; 3219#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 3218#fibo2FINAL assume true; 3215#fibo2EXIT >#50#return; 3065#L15-1 call #t~ret8 := fibo2(~n - 2);< 3123#fibo2ENTRY [2021-10-13 00:05:18,434 INFO L793 eck$LassoCheckResult]: Loop: 3123#fibo2ENTRY ~n := #in~n; 3116#L20 assume !(~n < 1); 3061#L22 assume !(1 == ~n); 3067#L25 call #t~ret9 := fibo1(~n - 1);< 3200#fibo1ENTRY ~n := #in~n; 3213#L10 assume !(~n < 1); 3209#L12 assume !(1 == ~n); 3064#L15 call #t~ret7 := fibo2(~n - 1);< 3123#fibo2ENTRY [2021-10-13 00:05:18,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:18,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1055972758, now seen corresponding path program 1 times [2021-10-13 00:05:18,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:05:18,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825595609] [2021-10-13 00:05:18,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:18,435 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:05:18,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:18,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-13 00:05:18,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:18,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:05:18,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:18,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:05:18,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:18,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 00:05:18,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:18,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-10-13 00:05:18,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:18,602 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-13 00:05:18,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:05:18,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825595609] [2021-10-13 00:05:18,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825595609] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:05:18,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224011891] [2021-10-13 00:05:18,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:18,603 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:05:18,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:18,608 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:05:18,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-13 00:05:18,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:18,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 00:05:18,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:05:19,090 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 00:05:19,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224011891] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:05:19,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:05:19,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14] total 20 [2021-10-13 00:05:19,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44113016] [2021-10-13 00:05:19,093 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-13 00:05:19,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:19,094 INFO L82 PathProgramCache]: Analyzing trace with hash -28526872, now seen corresponding path program 2 times [2021-10-13 00:05:19,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:05:19,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684694157] [2021-10-13 00:05:19,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:19,095 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:05:19,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:05:19,102 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:05:19,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:05:19,106 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:05:19,246 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:05:19,246 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:05:19,246 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:05:19,246 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:05:19,247 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-13 00:05:19,247 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:19,247 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:05:19,247 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:05:19,247 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration6_Loop [2021-10-13 00:05:19,247 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:05:19,247 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:05:19,249 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:19,257 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:19,260 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:19,262 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:19,265 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:19,268 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:19,270 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:19,273 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:19,278 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:19,280 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:19,335 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:05:19,335 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-13 00:05:19,335 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:19,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:19,342 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:19,347 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:05:19,347 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:05:19,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Waiting until timeout for monitored process [2021-10-13 00:05:19,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:19,406 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:19,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:19,407 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:19,414 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-13 00:05:19,414 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:05:19,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Waiting until timeout for monitored process [2021-10-13 00:05:19,546 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-13 00:05:19,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:19,557 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:05:19,557 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:05:19,557 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:05:19,557 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:05:19,557 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-13 00:05:19,557 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:19,558 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:05:19,558 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:05:19,558 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration6_Loop [2021-10-13 00:05:19,558 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:05:19,558 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:05:19,559 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:19,561 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:19,564 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:19,571 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:19,575 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:19,578 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:19,580 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:19,583 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:19,585 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:19,588 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:19,652 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:05:19,653 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-13 00:05:19,653 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:19,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:19,654 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:19,660 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 00:05:19,671 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:05:19,671 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:05:19,671 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:05:19,671 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:05:19,671 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:05:19,673 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:05:19,673 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:05:19,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Waiting until timeout for monitored process [2021-10-13 00:05:19,694 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:05:19,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:19,738 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:19,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:19,740 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:19,742 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 00:05:19,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Waiting until timeout for monitored process [2021-10-13 00:05:19,751 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:05:19,751 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:05:19,751 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:05:19,751 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:05:19,751 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:05:19,752 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:05:19,752 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:05:19,769 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:05:19,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:19,815 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:19,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:19,816 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:19,818 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 00:05:19,829 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:05:19,829 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:05:19,829 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:05:19,829 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:05:19,829 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:05:19,831 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:05:19,831 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:05:19,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Waiting until timeout for monitored process [2021-10-13 00:05:19,846 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-13 00:05:19,851 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-13 00:05:19,851 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-13 00:05:19,851 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:19,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:19,854 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:19,855 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-13 00:05:19,855 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-13 00:05:19,855 INFO L513 LassoAnalysis]: Proved termination. [2021-10-13 00:05:19,855 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_#in~n) = 1*fibo2_#in~n Supporting invariants [] [2021-10-13 00:05:19,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Waiting until timeout for monitored process [2021-10-13 00:05:19,893 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Ended with exit code 0 [2021-10-13 00:05:19,893 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-13 00:05:19,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:19,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:19,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 00:05:19,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:05:20,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:20,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:20,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 00:05:20,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:05:20,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:05:20,978 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 [2021-10-13 00:05:20,978 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 194 states and 249 transitions. cyclomatic complexity: 60 Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-13 00:05:21,183 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 194 states and 249 transitions. cyclomatic complexity: 60. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Result 349 states and 444 transitions. Complement of second has 24 states. [2021-10-13 00:05:21,185 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 [2021-10-13 00:05:21,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-13 00:05:21,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 39 transitions. [2021-10-13 00:05:21,186 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 39 transitions. Stem has 45 letters. Loop has 8 letters. [2021-10-13 00:05:21,188 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:05:21,188 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-13 00:05:21,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:21,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:21,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 00:05:21,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:05:21,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:21,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 00:05:21,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:05:22,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:05:22,031 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 [2021-10-13 00:05:22,031 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 194 states and 249 transitions. cyclomatic complexity: 60 Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-13 00:05:22,203 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 194 states and 249 transitions. cyclomatic complexity: 60. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Result 349 states and 444 transitions. Complement of second has 24 states. [2021-10-13 00:05:22,208 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 [2021-10-13 00:05:22,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-13 00:05:22,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 39 transitions. [2021-10-13 00:05:22,209 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 39 transitions. Stem has 45 letters. Loop has 8 letters. [2021-10-13 00:05:22,209 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:05:22,209 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-13 00:05:22,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:22,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:22,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 00:05:22,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:05:22,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:22,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 00:05:22,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:05:23,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:05:23,029 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 [2021-10-13 00:05:23,029 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 194 states and 249 transitions. cyclomatic complexity: 60 Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-13 00:05:23,219 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 194 states and 249 transitions. cyclomatic complexity: 60. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Result 426 states and 529 transitions. Complement of second has 23 states. [2021-10-13 00:05:23,222 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 [2021-10-13 00:05:23,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-13 00:05:23,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 43 transitions. [2021-10-13 00:05:23,223 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 45 letters. Loop has 8 letters. [2021-10-13 00:05:23,225 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:05:23,225 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 53 letters. Loop has 8 letters. [2021-10-13 00:05:23,226 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:05:23,226 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 45 letters. Loop has 16 letters. [2021-10-13 00:05:23,227 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:05:23,227 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 426 states and 529 transitions. [2021-10-13 00:05:23,234 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2021-10-13 00:05:23,242 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 426 states to 329 states and 427 transitions. [2021-10-13 00:05:23,242 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 180 [2021-10-13 00:05:23,243 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 194 [2021-10-13 00:05:23,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 329 states and 427 transitions. [2021-10-13 00:05:23,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 00:05:23,243 INFO L681 BuchiCegarLoop]: Abstraction has 329 states and 427 transitions. [2021-10-13 00:05:23,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states and 427 transitions. [2021-10-13 00:05:23,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 297. [2021-10-13 00:05:23,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 197 states have (on average 1.1878172588832487) internal successors, (234), 212 states have internal predecessors, (234), 55 states have call successors, (56), 44 states have call predecessors, (56), 45 states have return successors, (90), 40 states have call predecessors, (90), 53 states have call successors, (90) [2021-10-13 00:05:23,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 380 transitions. [2021-10-13 00:05:23,263 INFO L704 BuchiCegarLoop]: Abstraction has 297 states and 380 transitions. [2021-10-13 00:05:23,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:05:23,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 00:05:23,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-10-13 00:05:23,264 INFO L87 Difference]: Start difference. First operand 297 states and 380 transitions. Second operand has 20 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 12 states have call successors, (15), 5 states have call predecessors, (15), 7 states have return successors, (10), 6 states have call predecessors, (10), 8 states have call successors, (10) [2021-10-13 00:05:23,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:05:23,884 INFO L93 Difference]: Finished difference Result 405 states and 576 transitions. [2021-10-13 00:05:23,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 00:05:23,885 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 405 states and 576 transitions. [2021-10-13 00:05:23,894 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 52 [2021-10-13 00:05:23,903 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 405 states to 405 states and 576 transitions. [2021-10-13 00:05:23,904 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 246 [2021-10-13 00:05:23,904 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 246 [2021-10-13 00:05:23,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 405 states and 576 transitions. [2021-10-13 00:05:23,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 00:05:23,905 INFO L681 BuchiCegarLoop]: Abstraction has 405 states and 576 transitions. [2021-10-13 00:05:23,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states and 576 transitions. [2021-10-13 00:05:23,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 369. [2021-10-13 00:05:23,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 236 states have (on average 1.194915254237288) internal successors, (282), 256 states have internal predecessors, (282), 78 states have call successors, (80), 48 states have call predecessors, (80), 55 states have return successors, (146), 64 states have call predecessors, (146), 76 states have call successors, (146) [2021-10-13 00:05:23,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 508 transitions. [2021-10-13 00:05:23,945 INFO L704 BuchiCegarLoop]: Abstraction has 369 states and 508 transitions. [2021-10-13 00:05:23,945 INFO L587 BuchiCegarLoop]: Abstraction has 369 states and 508 transitions. [2021-10-13 00:05:23,945 INFO L425 BuchiCegarLoop]: ======== Iteration 7============ [2021-10-13 00:05:23,945 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 369 states and 508 transitions. [2021-10-13 00:05:23,949 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 51 [2021-10-13 00:05:23,950 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:05:23,950 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:05:23,951 INFO L842 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] [2021-10-13 00:05:23,951 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:05:23,953 INFO L791 eck$LassoCheckResult]: Stem: 5923#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); 5924#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 5955#L39 call main_#t~ret11 := fibo1(main_~x~0);< 6004#fibo1ENTRY ~n := #in~n; 6042#L10 assume !(~n < 1); 6041#L12 assume !(1 == ~n); 6037#L15 call #t~ret7 := fibo2(~n - 1);< 6040#fibo2ENTRY ~n := #in~n; 6039#L20 assume !(~n < 1); 6038#L22 assume !(1 == ~n); 6006#L25 call #t~ret9 := fibo1(~n - 1);< 6036#fibo1ENTRY ~n := #in~n; 6035#L10 assume !(~n < 1); 6034#L12 assume !(1 == ~n); 6017#L15 call #t~ret7 := fibo2(~n - 1);< 6018#fibo2ENTRY ~n := #in~n; 6027#L20 assume !(~n < 1); 6028#L22 assume !(1 == ~n); 5965#L25 call #t~ret9 := fibo1(~n - 1);< 6029#fibo1ENTRY ~n := #in~n; 6030#L10 assume !(~n < 1); 6125#L12 assume !(1 == ~n); 6116#L15 call #t~ret7 := fibo2(~n - 1);< 6117#fibo2ENTRY ~n := #in~n; 6123#L20 assume !(~n < 1); 6122#L22 assume 1 == ~n;#res := 1; 6120#fibo2FINAL assume true; 6115#fibo2EXIT >#50#return; 6112#L15-1 call #t~ret8 := fibo2(~n - 2);< 6113#fibo2ENTRY ~n := #in~n; 6118#L20 assume ~n < 1;#res := 0; 6114#fibo2FINAL assume true; 6111#fibo2EXIT >#52#return; 6110#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 6109#fibo1FINAL assume true; 6108#fibo1EXIT >#46#return; 6099#L25-1 call #t~ret10 := fibo1(~n - 2);< 5946#fibo1ENTRY ~n := #in~n; 6102#L10 assume !(~n < 1); 6101#L12 assume !(1 == ~n); 5945#L15 call #t~ret7 := fibo2(~n - 1);< 6098#fibo2ENTRY ~n := #in~n; 6097#L20 assume !(~n < 1); 6094#L22 assume 1 == ~n;#res := 1; 6095#fibo2FINAL assume true; 6210#fibo2EXIT >#50#return; 6143#L15-1 [2021-10-13 00:05:23,955 INFO L793 eck$LassoCheckResult]: Loop: 6143#L15-1 call #t~ret8 := fibo2(~n - 2);< 6142#fibo2ENTRY ~n := #in~n; 6144#L20 assume !(~n < 1); 6228#L22 assume !(1 == ~n); 5986#L25 call #t~ret9 := fibo1(~n - 1);< 5962#fibo1ENTRY ~n := #in~n; 5985#L10 assume !(~n < 1); 5987#L12 assume !(1 == ~n); 5960#L15 call #t~ret7 := fibo2(~n - 1);< 5995#fibo2ENTRY ~n := #in~n; 6003#L20 assume !(~n < 1); 6216#L22 assume 1 == ~n;#res := 1; 6214#fibo2FINAL assume true; 6212#fibo2EXIT >#50#return; 6143#L15-1 [2021-10-13 00:05:23,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:23,956 INFO L82 PathProgramCache]: Analyzing trace with hash 881386511, now seen corresponding path program 1 times [2021-10-13 00:05:23,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:05:23,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633959691] [2021-10-13 00:05:23,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:23,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:05:23,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:24,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-13 00:05:24,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:24,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:05:24,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:24,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 00:05:24,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:24,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-10-13 00:05:24,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:24,185 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 00:05:24,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:05:24,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633959691] [2021-10-13 00:05:24,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633959691] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:05:24,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879121072] [2021-10-13 00:05:24,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:24,186 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:05:24,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:24,191 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:05:24,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-10-13 00:05:24,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:24,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 00:05:24,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:05:24,734 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 27 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:05:24,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879121072] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:05:24,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:05:24,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 18 [2021-10-13 00:05:24,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973811844] [2021-10-13 00:05:24,735 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-13 00:05:24,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:24,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1489002864, now seen corresponding path program 1 times [2021-10-13 00:05:24,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:05:24,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612010066] [2021-10-13 00:05:24,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:24,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:05:24,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:05:24,747 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:05:24,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:05:24,751 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:05:24,958 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:05:24,958 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:05:24,958 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:05:24,958 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:05:24,959 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-13 00:05:24,959 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:24,959 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:05:24,959 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:05:24,959 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration7_Loop [2021-10-13 00:05:24,959 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:05:24,959 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:05:24,960 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:24,964 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:24,966 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:24,968 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:24,970 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:24,971 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:24,975 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:24,982 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:24,984 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:25,030 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:05:25,030 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-13 00:05:25,030 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:25,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:25,031 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:25,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Waiting until timeout for monitored process [2021-10-13 00:05:25,035 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:05:25,035 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:05:25,046 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:05:25,047 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret8=0} Honda state: {fibo1_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:05:25,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:25,075 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:25,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:25,076 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:25,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Waiting until timeout for monitored process [2021-10-13 00:05:25,078 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:05:25,078 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:05:25,094 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:05:25,094 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:05:25,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:25,121 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:25,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:25,121 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:25,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Waiting until timeout for monitored process [2021-10-13 00:05:25,127 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:05:25,127 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:05:25,136 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:05:25,136 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_~n=0} Honda state: {fibo2_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:05:25,158 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Ended with exit code 0 [2021-10-13 00:05:25,158 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:25,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:25,159 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:25,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Waiting until timeout for monitored process [2021-10-13 00:05:25,161 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:05:25,173 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:05:25,192 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:05:25,193 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:05:25,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:25,215 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:25,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:25,215 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:25,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Waiting until timeout for monitored process [2021-10-13 00:05:25,217 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:05:25,230 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:05:25,255 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:05:25,255 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret10=0} Honda state: {fibo2_#t~ret10=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:05:25,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:25,292 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:25,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:25,293 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:25,296 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:05:25,296 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:05:25,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Waiting until timeout for monitored process [2021-10-13 00:05:25,309 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:05:25,310 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret9=0} Honda state: {fibo2_#t~ret9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:05:25,332 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Ended with exit code 0 [2021-10-13 00:05:25,332 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:25,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:25,333 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:25,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Waiting until timeout for monitored process [2021-10-13 00:05:25,335 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:05:25,337 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:05:25,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Ended with exit code 0 [2021-10-13 00:05:25,369 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:25,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:25,370 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:25,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (53)] Waiting until timeout for monitored process [2021-10-13 00:05:25,371 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-13 00:05:25,371 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:05:26,441 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-13 00:05:26,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (53)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:26,445 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:05:26,445 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:05:26,445 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:05:26,445 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:05:26,445 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-13 00:05:26,445 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:26,445 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:05:26,445 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:05:26,445 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration7_Loop [2021-10-13 00:05:26,445 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:05:26,446 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:05:26,446 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:26,451 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:26,453 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:26,455 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:26,457 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:26,459 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:26,461 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:26,462 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:26,468 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:26,539 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:05:26,539 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-13 00:05:26,539 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:26,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:26,541 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:26,550 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 00:05:26,561 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:05:26,561 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:05:26,561 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:05:26,561 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:05:26,561 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:05:26,563 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:05:26,563 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:05:26,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Waiting until timeout for monitored process [2021-10-13 00:05:26,582 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:05:26,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:26,621 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:26,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:26,622 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:26,627 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 00:05:26,638 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:05:26,638 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:05:26,638 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:05:26,638 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:05:26,638 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:05:26,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Waiting until timeout for monitored process [2021-10-13 00:05:26,639 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:05:26,639 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:05:26,646 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:05:26,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Ended with exit code 0 [2021-10-13 00:05:26,685 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:26,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:26,686 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:26,691 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 00:05:26,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (56)] Waiting until timeout for monitored process [2021-10-13 00:05:26,700 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:05:26,700 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:05:26,700 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:05:26,700 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:05:26,700 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:05:26,701 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:05:26,701 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:05:26,702 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:05:26,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (56)] Ended with exit code 0 [2021-10-13 00:05:26,725 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:26,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:26,726 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:26,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (57)] Waiting until timeout for monitored process [2021-10-13 00:05:26,729 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 00:05:26,737 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:05:26,737 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:05:26,738 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:05:26,738 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:05:26,738 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:05:26,738 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:05:26,738 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:05:26,739 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:05:26,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (57)] Ended with exit code 0 [2021-10-13 00:05:26,762 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:26,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:26,765 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:26,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (58)] Waiting until timeout for monitored process [2021-10-13 00:05:26,773 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 00:05:26,782 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:05:26,782 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:05:26,782 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:05:26,782 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:05:26,782 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:05:26,782 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:05:26,782 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:05:26,784 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:05:26,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (58)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:26,805 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:26,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:26,806 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:26,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (59)] Waiting until timeout for monitored process [2021-10-13 00:05:26,808 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 00:05:26,816 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:05:26,816 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:05:26,816 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:05:26,816 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:05:26,816 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:05:26,817 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:05:26,817 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:05:26,820 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:05:26,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (59)] Ended with exit code 0 [2021-10-13 00:05:26,841 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:26,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:26,843 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:26,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (60)] Waiting until timeout for monitored process [2021-10-13 00:05:26,844 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 00:05:26,853 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:05:26,854 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:05:26,854 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:05:26,854 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:05:26,854 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:05:26,854 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:05:26,855 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:05:26,858 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:05:26,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (60)] Ended with exit code 0 [2021-10-13 00:05:26,878 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:26,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:26,879 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:26,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (61)] Waiting until timeout for monitored process [2021-10-13 00:05:26,881 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 00:05:26,888 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:05:26,888 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:05:26,888 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:05:26,888 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:05:26,888 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:05:26,889 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:05:26,889 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:05:26,892 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-13 00:05:26,894 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-10-13 00:05:26,894 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-10-13 00:05:26,894 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:26,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:26,896 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:26,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (62)] Waiting until timeout for monitored process [2021-10-13 00:05:26,897 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-13 00:05:26,897 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-13 00:05:26,897 INFO L513 LassoAnalysis]: Proved termination. [2021-10-13 00:05:26,897 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] [2021-10-13 00:05:26,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (61)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:26,918 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-13 00:05:26,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:26,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:26,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 00:05:26,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:05:27,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (62)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:27,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:27,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 00:05:27,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:05:27,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:05:27,791 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 [2021-10-13 00:05:27,791 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 369 states and 508 transitions. cyclomatic complexity: 145 Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-13 00:05:28,187 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 369 states and 508 transitions. cyclomatic complexity: 145. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Result 1274 states and 1770 transitions. Complement of second has 40 states. [2021-10-13 00:05:28,188 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 [2021-10-13 00:05:28,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-13 00:05:28,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 67 transitions. [2021-10-13 00:05:28,189 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 67 transitions. Stem has 46 letters. Loop has 14 letters. [2021-10-13 00:05:28,190 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:05:28,190 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-13 00:05:28,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:28,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:28,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 00:05:28,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:05:28,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:28,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 00:05:28,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:05:28,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:05:28,858 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 [2021-10-13 00:05:28,858 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 369 states and 508 transitions. cyclomatic complexity: 145 Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-13 00:05:29,184 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 369 states and 508 transitions. cyclomatic complexity: 145. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Result 582 states and 785 transitions. Complement of second has 26 states. [2021-10-13 00:05:29,184 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 [2021-10-13 00:05:29,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-13 00:05:29,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 46 transitions. [2021-10-13 00:05:29,185 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 46 transitions. Stem has 46 letters. Loop has 14 letters. [2021-10-13 00:05:29,186 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:05:29,186 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-13 00:05:29,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:29,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:29,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 00:05:29,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:05:29,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:29,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 00:05:29,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:05:29,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:05:29,963 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 [2021-10-13 00:05:29,963 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 369 states and 508 transitions. cyclomatic complexity: 145 Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-13 00:05:30,411 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 369 states and 508 transitions. cyclomatic complexity: 145. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Result 2713 states and 3811 transitions. Complement of second has 124 states. [2021-10-13 00:05:30,412 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 [2021-10-13 00:05:30,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-13 00:05:30,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 72 transitions. [2021-10-13 00:05:30,413 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 72 transitions. Stem has 46 letters. Loop has 14 letters. [2021-10-13 00:05:30,414 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:05:30,414 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 72 transitions. Stem has 60 letters. Loop has 14 letters. [2021-10-13 00:05:30,415 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:05:30,415 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 72 transitions. Stem has 46 letters. Loop has 28 letters. [2021-10-13 00:05:30,416 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:05:30,416 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 2713 states and 3811 transitions. [2021-10-13 00:05:30,487 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 157 [2021-10-13 00:05:30,535 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 2713 states to 2095 states and 3043 transitions. [2021-10-13 00:05:30,535 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 575 [2021-10-13 00:05:30,537 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 677 [2021-10-13 00:05:30,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2095 states and 3043 transitions. [2021-10-13 00:05:30,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 00:05:30,538 INFO L681 BuchiCegarLoop]: Abstraction has 2095 states and 3043 transitions. [2021-10-13 00:05:30,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2095 states and 3043 transitions. [2021-10-13 00:05:30,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2095 to 1775. [2021-10-13 00:05:30,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1775 states, 1140 states have (on average 1.1771929824561405) internal successors, (1342), 1251 states have internal predecessors, (1342), 375 states have call successors, (405), 220 states have call predecessors, (405), 260 states have return successors, (751), 303 states have call predecessors, (751), 373 states have call successors, (751) [2021-10-13 00:05:30,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1775 states to 1775 states and 2498 transitions. [2021-10-13 00:05:30,641 INFO L704 BuchiCegarLoop]: Abstraction has 1775 states and 2498 transitions. [2021-10-13 00:05:30,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:05:30,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 00:05:30,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-10-13 00:05:30,643 INFO L87 Difference]: Start difference. First operand 1775 states and 2498 transitions. Second operand has 18 states, 16 states have (on average 2.5625) internal successors, (41), 13 states have internal predecessors, (41), 10 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (7), 3 states have call predecessors, (7), 6 states have call successors, (7) [2021-10-13 00:05:31,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:05:31,107 INFO L93 Difference]: Finished difference Result 2563 states and 3815 transitions. [2021-10-13 00:05:31,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 00:05:31,108 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 2563 states and 3815 transitions. [2021-10-13 00:05:31,148 INFO L131 ngComponentsAnalysis]: Automaton has 8 accepting balls. 232 [2021-10-13 00:05:31,198 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 2563 states to 2560 states and 3811 transitions. [2021-10-13 00:05:31,198 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 824 [2021-10-13 00:05:31,200 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 824 [2021-10-13 00:05:31,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2560 states and 3811 transitions. [2021-10-13 00:05:31,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 00:05:31,201 INFO L681 BuchiCegarLoop]: Abstraction has 2560 states and 3811 transitions. [2021-10-13 00:05:31,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2560 states and 3811 transitions. [2021-10-13 00:05:31,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2560 to 2382. [2021-10-13 00:05:31,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2382 states, 1519 states have (on average 1.1981566820276497) internal successors, (1820), 1658 states have internal predecessors, (1820), 556 states have call successors, (594), 295 states have call predecessors, (594), 307 states have return successors, (1169), 428 states have call predecessors, (1169), 554 states have call successors, (1169) [2021-10-13 00:05:31,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2382 states to 2382 states and 3583 transitions. [2021-10-13 00:05:31,321 INFO L704 BuchiCegarLoop]: Abstraction has 2382 states and 3583 transitions. [2021-10-13 00:05:31,321 INFO L587 BuchiCegarLoop]: Abstraction has 2382 states and 3583 transitions. [2021-10-13 00:05:31,321 INFO L425 BuchiCegarLoop]: ======== Iteration 8============ [2021-10-13 00:05:31,321 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 2382 states and 3583 transitions. [2021-10-13 00:05:31,342 INFO L131 ngComponentsAnalysis]: Automaton has 8 accepting balls. 231 [2021-10-13 00:05:31,342 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:05:31,342 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:05:31,346 INFO L842 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] [2021-10-13 00:05:31,347 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [18, 17, 12, 10, 10, 9, 9, 9, 9, 9, 8, 8, 7, 6, 5, 5, 5, 5, 4, 4, 1] [2021-10-13 00:05:31,347 INFO L791 eck$LassoCheckResult]: Stem: 16205#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); 16206#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 16260#L39 call main_#t~ret11 := fibo1(main_~x~0);< 16308#fibo1ENTRY ~n := #in~n; 16384#L10 assume !(~n < 1); 16383#L12 assume !(1 == ~n); 16379#L15 call #t~ret7 := fibo2(~n - 1);< 16382#fibo2ENTRY ~n := #in~n; 16381#L20 assume !(~n < 1); 16380#L22 assume !(1 == ~n); 16375#L25 call #t~ret9 := fibo1(~n - 1);< 16378#fibo1ENTRY ~n := #in~n; 16377#L10 assume !(~n < 1); 16376#L12 assume !(1 == ~n); 16370#L15 call #t~ret7 := fibo2(~n - 1);< 16374#fibo2ENTRY ~n := #in~n; 16373#L20 assume !(~n < 1); 16372#L22 assume !(1 == ~n); 16353#L25 call #t~ret9 := fibo1(~n - 1);< 16368#fibo1ENTRY ~n := #in~n; 16365#L10 assume !(~n < 1); 16351#L12 assume !(1 == ~n); 16343#L15 call #t~ret7 := fibo2(~n - 1);< 16361#fibo2ENTRY ~n := #in~n; 16359#L20 assume !(~n < 1); 16355#L22 assume 1 == ~n;#res := 1; 16356#fibo2FINAL assume true; 16342#fibo2EXIT >#50#return; 16344#L15-1 call #t~ret8 := fibo2(~n - 2);< 16838#fibo2ENTRY ~n := #in~n; 16836#L20 assume !(~n < 1); 16834#L22 assume !(1 == ~n); 16831#L25 call #t~ret9 := fibo1(~n - 1);< 16832#fibo1ENTRY ~n := #in~n; 16845#L10 assume !(~n < 1); 16843#L12 assume !(1 == ~n); 16841#L15 call #t~ret7 := fibo2(~n - 1);< 16842#fibo2ENTRY ~n := #in~n; 16850#L20 assume !(~n < 1); 16848#L22 assume 1 == ~n;#res := 1; 16847#fibo2FINAL assume true; 16840#fibo2EXIT >#50#return; 16344#L15-1 call #t~ret8 := fibo2(~n - 2);< 16838#fibo2ENTRY ~n := #in~n; 16839#L20 assume !(~n < 1); 17489#L22 assume !(1 == ~n); 17419#L25 call #t~ret9 := fibo1(~n - 1);< 17420#fibo1ENTRY ~n := #in~n; 17484#L10 assume !(~n < 1); 17483#L12 assume 1 == ~n;#res := 1; 17481#fibo1FINAL assume true; 17418#fibo1EXIT >#46#return; 17384#L25-1 call #t~ret10 := fibo1(~n - 2);< 17385#fibo1ENTRY ~n := #in~n; 17395#L10 assume ~n < 1;#res := 0; 17394#fibo1FINAL assume true; 17383#fibo1EXIT >#48#return; 17373#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 17372#fibo2FINAL assume true; 17370#fibo2EXIT >#52#return; 17211#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 17367#fibo1FINAL assume true; 17163#fibo1EXIT >#46#return; 17147#L25-1 [2021-10-13 00:05:31,348 INFO L793 eck$LassoCheckResult]: Loop: 17147#L25-1 call #t~ret10 := fibo1(~n - 2);< 17196#fibo1ENTRY ~n := #in~n; 17205#L10 assume !(~n < 1); 17203#L12 assume !(1 == ~n); 17195#L15 call #t~ret7 := fibo2(~n - 1);< 17201#fibo2ENTRY ~n := #in~n; 17199#L20 assume !(~n < 1); 17197#L22 assume 1 == ~n;#res := 1; 17186#fibo2FINAL assume true; 17209#fibo2EXIT >#50#return; 17189#L15-1 call #t~ret8 := fibo2(~n - 2);< 17207#fibo2ENTRY ~n := #in~n; 17244#L20 assume !(~n < 1); 17423#L22 assume !(1 == ~n); 17164#L25 call #t~ret9 := fibo1(~n - 1);< 17236#fibo1ENTRY ~n := #in~n; 17234#L10 assume !(~n < 1); 17226#L12 assume !(1 == ~n); 17216#L15 call #t~ret7 := fibo2(~n - 1);< 17217#fibo2ENTRY ~n := #in~n; 17328#L20 assume !(~n < 1); 17351#L22 assume 1 == ~n;#res := 1; 17223#fibo2FINAL assume true; 17215#fibo2EXIT >#50#return; 17210#L15-1 call #t~ret8 := fibo2(~n - 2);< 17207#fibo2ENTRY ~n := #in~n; 17244#L20 assume !(~n < 1); 17423#L22 assume !(1 == ~n); 17164#L25 call #t~ret9 := fibo1(~n - 1);< 17236#fibo1ENTRY ~n := #in~n; 17234#L10 assume !(~n < 1); 17226#L12 assume !(1 == ~n); 17227#L15 call #t~ret7 := fibo2(~n - 1);< 17399#fibo2ENTRY ~n := #in~n; 17501#L20 assume !(~n < 1); 17539#L22 assume !(1 == ~n); 17533#L25 call #t~ret9 := fibo1(~n - 1);< 17538#fibo1ENTRY ~n := #in~n; 17772#L10 assume !(~n < 1); 17770#L12 assume !(1 == ~n); 17765#L15 call #t~ret7 := fibo2(~n - 1);< 17768#fibo2ENTRY ~n := #in~n; 17814#L20 assume !(~n < 1); 17835#L22 assume 1 == ~n;#res := 1; 17796#fibo2FINAL assume true; 17764#fibo2EXIT >#50#return; 17543#L15-1 call #t~ret8 := fibo2(~n - 2);< 17754#fibo2ENTRY ~n := #in~n; 17797#L20 assume ~n < 1;#res := 0; 17774#fibo2FINAL assume true; 17755#fibo2EXIT >#52#return; 17753#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 17737#fibo1FINAL assume true; 17527#fibo1EXIT >#46#return; 17517#L25-1 call #t~ret10 := fibo1(~n - 2);< 17534#fibo1ENTRY ~n := #in~n; 17801#L10 assume !(~n < 1); 17799#L12 assume !(1 == ~n); 17545#L15 call #t~ret7 := fibo2(~n - 1);< 17767#fibo2ENTRY ~n := #in~n; 17782#L20 assume !(~n < 1); 17781#L22 assume 1 == ~n;#res := 1; 17678#fibo2FINAL assume true; 17762#fibo2EXIT >#50#return; 17543#L15-1 call #t~ret8 := fibo2(~n - 2);< 17754#fibo2ENTRY ~n := #in~n; 17797#L20 assume ~n < 1;#res := 0; 17774#fibo2FINAL assume true; 17755#fibo2EXIT >#52#return; 17753#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 17737#fibo1FINAL assume true; 17527#fibo1EXIT >#48#return; 17510#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 17461#fibo2FINAL assume true; 17398#fibo2EXIT >#50#return; 17156#L15-1 call #t~ret8 := fibo2(~n - 2);< 17161#fibo2ENTRY ~n := #in~n; 17364#L20 assume ~n < 1;#res := 0; 17360#fibo2FINAL assume true; 17155#fibo2EXIT >#52#return; 17160#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 17393#fibo1FINAL assume true; 17390#fibo1EXIT >#46#return; 17147#L25-1 call #t~ret10 := fibo1(~n - 2);< 17196#fibo1ENTRY ~n := #in~n; 17205#L10 assume !(~n < 1); 17203#L12 assume !(1 == ~n); 17195#L15 call #t~ret7 := fibo2(~n - 1);< 17201#fibo2ENTRY ~n := #in~n; 17199#L20 assume !(~n < 1); 17197#L22 assume 1 == ~n;#res := 1; 17186#fibo2FINAL assume true; 17209#fibo2EXIT >#50#return; 17189#L15-1 call #t~ret8 := fibo2(~n - 2);< 17207#fibo2ENTRY ~n := #in~n; 17244#L20 assume !(~n < 1); 17423#L22 assume !(1 == ~n); 17164#L25 call #t~ret9 := fibo1(~n - 1);< 17236#fibo1ENTRY ~n := #in~n; 17234#L10 assume !(~n < 1); 17226#L12 assume !(1 == ~n); 17227#L15 call #t~ret7 := fibo2(~n - 1);< 17399#fibo2ENTRY ~n := #in~n; 17501#L20 assume !(~n < 1); 17539#L22 assume !(1 == ~n); 17533#L25 call #t~ret9 := fibo1(~n - 1);< 17538#fibo1ENTRY ~n := #in~n; 17772#L10 assume !(~n < 1); 17770#L12 assume !(1 == ~n); 17765#L15 call #t~ret7 := fibo2(~n - 1);< 17768#fibo2ENTRY ~n := #in~n; 17814#L20 assume !(~n < 1); 17835#L22 assume 1 == ~n;#res := 1; 17796#fibo2FINAL assume true; 17764#fibo2EXIT >#50#return; 17543#L15-1 call #t~ret8 := fibo2(~n - 2);< 17754#fibo2ENTRY ~n := #in~n; 17797#L20 assume ~n < 1;#res := 0; 17774#fibo2FINAL assume true; 17755#fibo2EXIT >#52#return; 17753#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 17737#fibo1FINAL assume true; 17527#fibo1EXIT >#46#return; 17517#L25-1 call #t~ret10 := fibo1(~n - 2);< 17534#fibo1ENTRY ~n := #in~n; 17801#L10 assume !(~n < 1); 17799#L12 assume !(1 == ~n); 17545#L15 call #t~ret7 := fibo2(~n - 1);< 17767#fibo2ENTRY ~n := #in~n; 17782#L20 assume !(~n < 1); 17781#L22 assume 1 == ~n;#res := 1; 17678#fibo2FINAL assume true; 17762#fibo2EXIT >#50#return; 17543#L15-1 call #t~ret8 := fibo2(~n - 2);< 17754#fibo2ENTRY ~n := #in~n; 17797#L20 assume ~n < 1;#res := 0; 17774#fibo2FINAL assume true; 17755#fibo2EXIT >#52#return; 17753#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 17737#fibo1FINAL assume true; 17527#fibo1EXIT >#48#return; 17510#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 17461#fibo2FINAL assume true; 17398#fibo2EXIT >#50#return; 17156#L15-1 call #t~ret8 := fibo2(~n - 2);< 17161#fibo2ENTRY ~n := #in~n; 17364#L20 assume ~n < 1;#res := 0; 17360#fibo2FINAL assume true; 17155#fibo2EXIT >#52#return; 17160#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 17393#fibo1FINAL assume true; 17390#fibo1EXIT >#46#return; 17147#L25-1 call #t~ret10 := fibo1(~n - 2);< 17196#fibo1ENTRY ~n := #in~n; 17205#L10 assume !(~n < 1); 17203#L12 assume 1 == ~n;#res := 1; 17204#fibo1FINAL assume true; 17151#fibo1EXIT >#48#return; 17150#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 17371#fibo2FINAL assume true; 17369#fibo2EXIT >#52#return; 17211#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 17367#fibo1FINAL assume true; 17163#fibo1EXIT >#48#return; 17150#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 17371#fibo2FINAL assume true; 17369#fibo2EXIT >#52#return; 17211#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 17367#fibo1FINAL assume true; 17163#fibo1EXIT >#46#return; 17147#L25-1 [2021-10-13 00:05:31,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:31,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1399262747, now seen corresponding path program 1 times [2021-10-13 00:05:31,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:05:31,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600541440] [2021-10-13 00:05:31,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:31,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:05:31,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:31,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-10-13 00:05:31,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:31,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-13 00:05:31,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:31,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:05:31,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:31,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 00:05:31,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:31,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:05:31,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:31,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 00:05:31,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:31,556 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 11 proven. 79 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-10-13 00:05:31,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:05:31,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600541440] [2021-10-13 00:05:31,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600541440] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:05:31,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399080428] [2021-10-13 00:05:31,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:31,557 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:05:31,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:31,559 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:05:31,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-10-13 00:05:32,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:32,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 00:05:32,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:05:32,480 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 62 proven. 22 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-13 00:05:32,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399080428] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:05:32,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:05:32,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-10-13 00:05:32,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574624435] [2021-10-13 00:05:32,482 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-13 00:05:32,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:32,482 INFO L82 PathProgramCache]: Analyzing trace with hash -993859138, now seen corresponding path program 1 times [2021-10-13 00:05:32,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:05:32,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243809740] [2021-10-13 00:05:32,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:32,483 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:05:32,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:32,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-10-13 00:05:32,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:32,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-13 00:05:32,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:32,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:05:32,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:32,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 00:05:32,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:32,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:05:32,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:32,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:05:32,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:32,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:05:32,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:32,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:05:32,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:32,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 00:05:32,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:32,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-10-13 00:05:32,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:32,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:05:32,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:32,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 00:05:32,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:32,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-10-13 00:05:32,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:32,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-10-13 00:05:32,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:32,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:05:32,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:32,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 00:05:32,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:32,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:05:32,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:32,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:05:32,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:32,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:05:32,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:32,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:05:32,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:32,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 00:05:32,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:32,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-10-13 00:05:32,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:32,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:05:32,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:32,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 00:05:32,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:32,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-10-13 00:05:32,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:32,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-10-13 00:05:32,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:32,821 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 2 proven. 113 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked. [2021-10-13 00:05:32,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:05:32,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243809740] [2021-10-13 00:05:32,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243809740] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:05:32,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46566829] [2021-10-13 00:05:32,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:32,823 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:05:32,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:32,827 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:05:32,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-10-13 00:05:33,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:33,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 00:05:33,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:05:33,793 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 155 proven. 1 refuted. 0 times theorem prover too weak. 821 trivial. 0 not checked. [2021-10-13 00:05:33,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46566829] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:05:33,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:05:33,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-10-13 00:05:33,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249322045] [2021-10-13 00:05:33,796 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-13 00:05:33,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:05:33,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 00:05:33,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-10-13 00:05:33,797 INFO L87 Difference]: Start difference. First operand 2382 states and 3583 transitions. cyclomatic complexity: 1228 Second operand has 16 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 11 states have internal predecessors, (50), 8 states have call successors, (15), 7 states have call predecessors, (15), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-10-13 00:05:34,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:05:34,086 INFO L93 Difference]: Finished difference Result 2429 states and 3633 transitions. [2021-10-13 00:05:34,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 00:05:34,087 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 2429 states and 3633 transitions. [2021-10-13 00:05:34,126 INFO L131 ngComponentsAnalysis]: Automaton has 8 accepting balls. 231 [2021-10-13 00:05:34,173 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 2429 states to 2425 states and 3626 transitions. [2021-10-13 00:05:34,173 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 759 [2021-10-13 00:05:34,175 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 759 [2021-10-13 00:05:34,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2425 states and 3626 transitions. [2021-10-13 00:05:34,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 00:05:34,176 INFO L681 BuchiCegarLoop]: Abstraction has 2425 states and 3626 transitions. [2021-10-13 00:05:34,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states and 3626 transitions. [2021-10-13 00:05:34,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 2404. [2021-10-13 00:05:34,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2404 states, 1527 states have (on average 1.197773411918795) internal successors, (1829), 1682 states have internal predecessors, (1829), 562 states have call successors, (600), 297 states have call predecessors, (600), 315 states have return successors, (1160), 424 states have call predecessors, (1160), 559 states have call successors, (1160) [2021-10-13 00:05:34,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2404 states to 2404 states and 3589 transitions. [2021-10-13 00:05:34,290 INFO L704 BuchiCegarLoop]: Abstraction has 2404 states and 3589 transitions. [2021-10-13 00:05:34,290 INFO L587 BuchiCegarLoop]: Abstraction has 2404 states and 3589 transitions. [2021-10-13 00:05:34,290 INFO L425 BuchiCegarLoop]: ======== Iteration 9============ [2021-10-13 00:05:34,291 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 2404 states and 3589 transitions. [2021-10-13 00:05:34,351 INFO L131 ngComponentsAnalysis]: Automaton has 8 accepting balls. 231 [2021-10-13 00:05:34,351 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:05:34,352 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:05:34,353 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:05:34,353 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:05:34,353 INFO L791 eck$LassoCheckResult]: Stem: 22581#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); 22582#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 22627#L39 call main_#t~ret11 := fibo1(main_~x~0);< 22681#fibo1ENTRY ~n := #in~n; 22901#L10 assume !(~n < 1); 22894#L12 assume !(1 == ~n); 22707#L15 call #t~ret7 := fibo2(~n - 1);< 22714#fibo2ENTRY ~n := #in~n; 22773#L20 assume !(~n < 1); 22770#L22 assume !(1 == ~n); 22737#L25 call #t~ret9 := fibo1(~n - 1);< 22738#fibo1ENTRY ~n := #in~n; 22757#L10 assume !(~n < 1); 22755#L12 assume !(1 == ~n); 22735#L15 call #t~ret7 := fibo2(~n - 1);< 22750#fibo2ENTRY ~n := #in~n; 22741#L20 assume !(~n < 1); 22739#L22 assume !(1 == ~n); 22715#L25 call #t~ret9 := fibo1(~n - 1);< 22734#fibo1ENTRY ~n := #in~n; 22732#L10 assume !(~n < 1); 22730#L12 assume !(1 == ~n); 22711#L15 call #t~ret7 := fibo2(~n - 1);< 22716#fibo2ENTRY ~n := #in~n; 22774#L20 assume !(~n < 1); 22771#L22 assume !(1 == ~n); 22726#L25 call #t~ret9 := fibo1(~n - 1);< 22769#fibo1ENTRY ~n := #in~n; 22797#L10 assume !(~n < 1); 22792#L12 assume 1 == ~n;#res := 1; 22793#fibo1FINAL assume true; 23632#fibo1EXIT >#46#return; 22807#L25-1 call #t~ret10 := fibo1(~n - 2);< 22810#fibo1ENTRY ~n := #in~n; 23251#L10 assume ~n < 1;#res := 0; 23250#fibo1FINAL assume true; 22806#fibo1EXIT >#48#return; 22804#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 22802#fibo2FINAL assume true; 22758#fibo2EXIT >#50#return; 22702#L15-1 call #t~ret8 := fibo2(~n - 2);< 22723#fibo2ENTRY ~n := #in~n; 22888#L20 assume !(~n < 1); 22886#L22 assume !(1 == ~n); 22880#L25 [2021-10-13 00:05:34,353 INFO L793 eck$LassoCheckResult]: Loop: 22880#L25 call #t~ret9 := fibo1(~n - 1);< 22883#fibo1ENTRY ~n := #in~n; 22968#L10 assume !(~n < 1); 22967#L12 assume !(1 == ~n); 22891#L15 call #t~ret7 := fibo2(~n - 1);< 22893#fibo2ENTRY ~n := #in~n; 23516#L20 assume !(~n < 1); 23062#L22 assume !(1 == ~n); 23063#L25 call #t~ret9 := fibo1(~n - 1);< 23490#fibo1ENTRY ~n := #in~n; 23626#L10 assume !(~n < 1); 23619#L12 assume 1 == ~n;#res := 1; 23616#fibo1FINAL assume true; 23484#fibo1EXIT >#46#return; 22948#L25-1 call #t~ret10 := fibo1(~n - 2);< 22949#fibo1ENTRY ~n := #in~n; 23562#L10 assume ~n < 1;#res := 0; 23560#fibo1FINAL assume true; 23473#fibo1EXIT >#48#return; 22937#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 22935#fibo2FINAL assume true; 22890#fibo2EXIT >#50#return; 22698#L15-1 call #t~ret8 := fibo2(~n - 2);< 22723#fibo2ENTRY ~n := #in~n; 22888#L20 assume !(~n < 1); 22886#L22 assume !(1 == ~n); 22880#L25 [2021-10-13 00:05:34,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:34,354 INFO L82 PathProgramCache]: Analyzing trace with hash -334000957, now seen corresponding path program 1 times [2021-10-13 00:05:34,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:05:34,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480687864] [2021-10-13 00:05:34,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:34,355 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:05:34,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:34,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-10-13 00:05:34,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:34,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:05:34,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:34,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 00:05:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:34,540 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:05:34,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:05:34,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480687864] [2021-10-13 00:05:34,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480687864] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:05:34,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050998785] [2021-10-13 00:05:34,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:34,541 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:05:34,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:34,543 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:05:34,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-10-13 00:05:35,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:35,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 00:05:35,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:05:35,239 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:05:35,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050998785] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:05:35,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:05:35,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 20 [2021-10-13 00:05:35,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620658754] [2021-10-13 00:05:35,240 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-13 00:05:35,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:35,240 INFO L82 PathProgramCache]: Analyzing trace with hash 869465037, now seen corresponding path program 1 times [2021-10-13 00:05:35,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:05:35,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133962140] [2021-10-13 00:05:35,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:35,240 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:05:35,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:35,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-10-13 00:05:35,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:35,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:05:35,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:35,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 00:05:35,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:35,336 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 00:05:35,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:05:35,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133962140] [2021-10-13 00:05:35,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133962140] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:05:35,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116931357] [2021-10-13 00:05:35,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:35,338 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:05:35,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:35,340 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:05:35,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-10-13 00:05:35,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:35,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 00:05:35,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:05:36,009 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 00:05:36,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116931357] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:05:36,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:05:36,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-10-13 00:05:36,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75404485] [2021-10-13 00:05:36,011 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-13 00:05:36,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:05:36,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 00:05:36,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-10-13 00:05:36,013 INFO L87 Difference]: Start difference. First operand 2404 states and 3589 transitions. cyclomatic complexity: 1212 Second operand has 13 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-13 00:05:36,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:05:36,325 INFO L93 Difference]: Finished difference Result 1480 states and 1973 transitions. [2021-10-13 00:05:36,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 00:05:36,326 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1480 states and 1973 transitions. [2021-10-13 00:05:36,345 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 101 [2021-10-13 00:05:36,370 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1480 states to 1281 states and 1737 transitions. [2021-10-13 00:05:36,370 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 489 [2021-10-13 00:05:36,371 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 489 [2021-10-13 00:05:36,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1281 states and 1737 transitions. [2021-10-13 00:05:36,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 00:05:36,372 INFO L681 BuchiCegarLoop]: Abstraction has 1281 states and 1737 transitions. [2021-10-13 00:05:36,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states and 1737 transitions. [2021-10-13 00:05:36,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1039. [2021-10-13 00:05:36,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1039 states, 678 states have (on average 1.1592920353982301) internal successors, (786), 733 states have internal predecessors, (786), 204 states have call successors, (213), 137 states have call predecessors, (213), 157 states have return successors, (369), 168 states have call predecessors, (369), 201 states have call successors, (369) [2021-10-13 00:05:36,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1368 transitions. [2021-10-13 00:05:36,423 INFO L704 BuchiCegarLoop]: Abstraction has 1039 states and 1368 transitions. [2021-10-13 00:05:36,424 INFO L587 BuchiCegarLoop]: Abstraction has 1039 states and 1368 transitions. [2021-10-13 00:05:36,424 INFO L425 BuchiCegarLoop]: ======== Iteration 10============ [2021-10-13 00:05:36,424 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 1039 states and 1368 transitions. [2021-10-13 00:05:36,432 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 101 [2021-10-13 00:05:36,432 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:05:36,433 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:05:36,434 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:05:36,434 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:05:36,434 INFO L791 eck$LassoCheckResult]: Stem: 26765#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); 26766#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 26806#L39 call main_#t~ret11 := fibo1(main_~x~0);< 26852#fibo1ENTRY ~n := #in~n; 26885#L10 assume !(~n < 1); 26884#L12 assume !(1 == ~n); 26880#L15 call #t~ret7 := fibo2(~n - 1);< 26883#fibo2ENTRY ~n := #in~n; 26882#L20 assume !(~n < 1); 26881#L22 assume !(1 == ~n); 26876#L25 call #t~ret9 := fibo1(~n - 1);< 26879#fibo1ENTRY ~n := #in~n; 26878#L10 assume !(~n < 1); 26877#L12 assume !(1 == ~n); 26872#L15 call #t~ret7 := fibo2(~n - 1);< 26875#fibo2ENTRY ~n := #in~n; 26874#L20 assume !(~n < 1); 26873#L22 assume !(1 == ~n); 26867#L25 call #t~ret9 := fibo1(~n - 1);< 26871#fibo1ENTRY ~n := #in~n; 26869#L10 assume !(~n < 1); 26870#L12 assume !(1 == ~n); 26776#L15 call #t~ret7 := fibo2(~n - 1);< 26866#fibo2ENTRY ~n := #in~n; 26865#L20 assume !(~n < 1); 26864#L22 assume !(1 == ~n); 26861#L25 call #t~ret9 := fibo1(~n - 1);< 26860#fibo1ENTRY ~n := #in~n; 26863#L10 assume !(~n < 1); 26912#L12 assume !(1 == ~n); 26909#L15 call #t~ret7 := fibo2(~n - 1);< 26910#fibo2ENTRY ~n := #in~n; 26915#L20 assume !(~n < 1); 26914#L22 assume 1 == ~n;#res := 1; 26911#fibo2FINAL assume true; 26908#fibo2EXIT >#50#return; 26906#L15-1 call #t~ret8 := fibo2(~n - 2);< 26907#fibo2ENTRY ~n := #in~n; 26919#L20 assume ~n < 1;#res := 0; 26916#fibo2FINAL assume true; 26905#fibo2EXIT >#52#return; 26904#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 26903#fibo1FINAL assume true; 26902#fibo1EXIT >#46#return; 26896#L25-1 call #t~ret10 := fibo1(~n - 2);< 26900#fibo1ENTRY ~n := #in~n; 26899#L10 assume !(~n < 1); 26898#L12 assume !(1 == ~n); 26889#L15 call #t~ret7 := fibo2(~n - 1);< 26894#fibo2ENTRY ~n := #in~n; 26893#L20 assume !(~n < 1); 26888#L22 assume !(1 == ~n); 26891#L25 call #t~ret9 := fibo1(~n - 1);< 27232#fibo1ENTRY ~n := #in~n; 27257#L10 assume !(~n < 1); 27252#L12 assume !(1 == ~n); 27244#L15 call #t~ret7 := fibo2(~n - 1);< 27248#fibo2ENTRY [2021-10-13 00:05:36,435 INFO L793 eck$LassoCheckResult]: Loop: 27248#fibo2ENTRY ~n := #in~n; 27258#L20 assume !(~n < 1); 27254#L22 assume !(1 == ~n); 27250#L25 call #t~ret9 := fibo1(~n - 1);< 27261#fibo1ENTRY ~n := #in~n; 27259#L10 assume !(~n < 1); 27255#L12 assume !(1 == ~n); 27243#L15 call #t~ret7 := fibo2(~n - 1);< 27248#fibo2ENTRY [2021-10-13 00:05:36,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:36,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1022485656, now seen corresponding path program 2 times [2021-10-13 00:05:36,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:05:36,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129120698] [2021-10-13 00:05:36,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:36,436 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:05:36,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:36,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-10-13 00:05:36,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:36,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:05:36,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:36,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 00:05:36,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:36,672 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 76 proven. 27 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 00:05:36,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:05:36,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129120698] [2021-10-13 00:05:36,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129120698] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:05:36,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22710679] [2021-10-13 00:05:36,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:05:36,673 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:05:36,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:36,675 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:05:36,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-10-13 00:05:37,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:05:37,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:05:37,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 00:05:37,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:05:37,491 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 77 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 00:05:37,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22710679] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:05:37,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:05:37,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 20 [2021-10-13 00:05:37,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487913819] [2021-10-13 00:05:37,492 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-13 00:05:37,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:37,493 INFO L82 PathProgramCache]: Analyzing trace with hash -28526872, now seen corresponding path program 3 times [2021-10-13 00:05:37,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:05:37,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254640542] [2021-10-13 00:05:37,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:37,494 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:05:37,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:05:37,504 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:05:37,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:05:37,507 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:05:37,626 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:05:37,627 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:05:37,627 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:05:37,627 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:05:37,627 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-13 00:05:37,627 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:37,627 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:05:37,627 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:05:37,627 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration10_Loop [2021-10-13 00:05:37,627 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:05:37,627 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:05:37,628 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:37,631 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:37,633 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:37,636 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:37,638 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:37,640 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:37,648 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:37,651 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:37,653 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:37,655 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:37,713 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:05:37,714 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-13 00:05:37,714 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:37,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:37,719 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:37,728 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:05:37,728 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:05:37,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (68)] Waiting until timeout for monitored process [2021-10-13 00:05:37,750 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:05:37,751 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret7=0} Honda state: {fibo1_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:05:37,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (68)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:37,791 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:37,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:37,792 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:37,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (69)] Waiting until timeout for monitored process [2021-10-13 00:05:37,794 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:05:37,794 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:05:37,803 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:05:37,803 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:05:37,825 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (69)] Ended with exit code 0 [2021-10-13 00:05:37,825 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:37,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:37,826 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:37,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (70)] Waiting until timeout for monitored process [2021-10-13 00:05:37,827 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:05:37,827 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:05:37,837 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:05:37,837 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:05:37,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (70)] Ended with exit code 0 [2021-10-13 00:05:37,859 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:37,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:37,861 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:37,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (71)] Waiting until timeout for monitored process [2021-10-13 00:05:37,864 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:05:37,864 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:05:37,873 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:05:37,873 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#in~n=0} Honda state: {fibo1_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:05:37,896 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (71)] Ended with exit code 0 [2021-10-13 00:05:37,896 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:37,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:37,897 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:37,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (72)] Waiting until timeout for monitored process [2021-10-13 00:05:37,900 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:05:37,901 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:05:37,910 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:05:37,910 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret9=0} Honda state: {fibo2_#t~ret9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:05:37,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (72)] Ended with exit code 0 [2021-10-13 00:05:37,932 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:37,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:37,932 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:37,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (73)] Waiting until timeout for monitored process [2021-10-13 00:05:37,933 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:05:37,934 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:05:37,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (73)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:37,962 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:37,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:37,963 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:37,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (74)] Waiting until timeout for monitored process [2021-10-13 00:05:37,964 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-13 00:05:37,964 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:05:38,037 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-13 00:05:38,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (74)] Ended with exit code 0 [2021-10-13 00:05:38,039 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:05:38,039 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:05:38,040 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:05:38,040 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:05:38,040 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-13 00:05:38,040 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:38,040 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:05:38,040 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:05:38,040 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration10_Loop [2021-10-13 00:05:38,040 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:05:38,040 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:05:38,041 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:38,042 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:38,044 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:38,045 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:38,047 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:38,048 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:38,050 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:38,053 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:38,058 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:38,059 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:38,112 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:05:38,113 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-13 00:05:38,113 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:38,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:38,114 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:38,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (75)] Waiting until timeout for monitored process [2021-10-13 00:05:38,116 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 00:05:38,123 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:05:38,123 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:05:38,123 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:05:38,123 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:05:38,123 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:05:38,124 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:05:38,124 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:05:38,125 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:05:38,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (75)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:38,145 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:38,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:38,146 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:38,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (76)] Waiting until timeout for monitored process [2021-10-13 00:05:38,148 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 00:05:38,157 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:05:38,158 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:05:38,158 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:05:38,158 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:05:38,158 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:05:38,159 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:05:38,159 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:05:38,167 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:05:38,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (76)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:38,203 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:38,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:38,204 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:38,206 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 00:05:38,216 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:05:38,216 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:05:38,217 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:05:38,217 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:05:38,217 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:05:38,217 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:05:38,217 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:05:38,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (77)] Waiting until timeout for monitored process [2021-10-13 00:05:38,234 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:05:38,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (77)] Ended with exit code 0 [2021-10-13 00:05:38,255 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:38,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:38,256 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:38,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (78)] Waiting until timeout for monitored process [2021-10-13 00:05:38,257 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 00:05:38,265 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:05:38,265 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:05:38,265 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:05:38,265 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:05:38,265 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:05:38,267 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:05:38,267 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:05:38,268 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:05:38,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (78)] Ended with exit code 0 [2021-10-13 00:05:38,289 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:38,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:38,290 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:38,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (79)] Waiting until timeout for monitored process [2021-10-13 00:05:38,291 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 00:05:38,299 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:05:38,300 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:05:38,300 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:05:38,300 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:05:38,300 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:05:38,300 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:05:38,300 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:05:38,301 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:05:38,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (79)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:38,323 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:38,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:38,324 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:38,325 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 00:05:38,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (80)] Waiting until timeout for monitored process [2021-10-13 00:05:38,334 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:05:38,334 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:05:38,334 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:05:38,334 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:05:38,334 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:05:38,335 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:05:38,335 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:05:38,336 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:05:38,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (80)] Ended with exit code 0 [2021-10-13 00:05:38,359 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:38,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:38,359 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:38,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (81)] Waiting until timeout for monitored process [2021-10-13 00:05:38,361 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 00:05:38,369 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:05:38,369 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:05:38,369 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:05:38,369 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:05:38,369 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:05:38,369 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:05:38,370 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:05:38,371 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:05:38,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (81)] Ended with exit code 0 [2021-10-13 00:05:38,392 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:38,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:38,393 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:38,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (82)] Waiting until timeout for monitored process [2021-10-13 00:05:38,394 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 00:05:38,402 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:05:38,402 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:05:38,402 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:05:38,403 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:05:38,403 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:05:38,403 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:05:38,403 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:05:38,405 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-13 00:05:38,407 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-13 00:05:38,408 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-13 00:05:38,408 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:38,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:38,409 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:38,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (83)] Waiting until timeout for monitored process [2021-10-13 00:05:38,410 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-13 00:05:38,410 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-13 00:05:38,410 INFO L513 LassoAnalysis]: Proved termination. [2021-10-13 00:05:38,410 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_#in~n) = 1*fibo2_#in~n Supporting invariants [] [2021-10-13 00:05:38,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (82)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:38,432 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-13 00:05:38,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:38,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:38,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-13 00:05:38,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:05:38,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (83)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:39,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:39,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 00:05:39,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:05:39,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:05:39,233 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 [2021-10-13 00:05:39,233 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 1039 states and 1368 transitions. cyclomatic complexity: 340 Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 00:05:39,379 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 1039 states and 1368 transitions. cyclomatic complexity: 340. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 1076 states and 1404 transitions. Complement of second has 21 states. [2021-10-13 00:05:39,380 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 [2021-10-13 00:05:39,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 00:05:39,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 23 transitions. [2021-10-13 00:05:39,381 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 23 transitions. Stem has 57 letters. Loop has 8 letters. [2021-10-13 00:05:39,381 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:05:39,381 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-13 00:05:39,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:39,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:39,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-13 00:05:39,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:05:39,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:39,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 00:05:39,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:05:40,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:05:40,020 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 [2021-10-13 00:05:40,020 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 1039 states and 1368 transitions. cyclomatic complexity: 340 Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 00:05:40,149 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 1039 states and 1368 transitions. cyclomatic complexity: 340. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 1076 states and 1404 transitions. Complement of second has 21 states. [2021-10-13 00:05:40,150 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 [2021-10-13 00:05:40,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 00:05:40,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 23 transitions. [2021-10-13 00:05:40,151 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 23 transitions. Stem has 57 letters. Loop has 8 letters. [2021-10-13 00:05:40,151 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:05:40,151 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-13 00:05:40,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:40,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:40,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-13 00:05:40,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:05:40,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:40,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 00:05:40,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:05:40,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:05:40,779 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 [2021-10-13 00:05:40,779 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 1039 states and 1368 transitions. cyclomatic complexity: 340 Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 00:05:40,919 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 1039 states and 1368 transitions. cyclomatic complexity: 340. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 1821 states and 2255 transitions. Complement of second has 25 states. [2021-10-13 00:05:40,919 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 [2021-10-13 00:05:40,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 00:05:40,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 42 transitions. [2021-10-13 00:05:40,920 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 42 transitions. Stem has 57 letters. Loop has 8 letters. [2021-10-13 00:05:40,921 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:05:40,921 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 42 transitions. Stem has 65 letters. Loop has 8 letters. [2021-10-13 00:05:40,921 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:05:40,922 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 42 transitions. Stem has 57 letters. Loop has 16 letters. [2021-10-13 00:05:40,922 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:05:40,922 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1821 states and 2255 transitions. [2021-10-13 00:05:40,942 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 133 [2021-10-13 00:05:40,960 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1821 states to 1322 states and 1717 transitions. [2021-10-13 00:05:40,960 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 438 [2021-10-13 00:05:40,961 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 456 [2021-10-13 00:05:40,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1322 states and 1717 transitions. [2021-10-13 00:05:40,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 00:05:40,962 INFO L681 BuchiCegarLoop]: Abstraction has 1322 states and 1717 transitions. [2021-10-13 00:05:40,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states and 1717 transitions. [2021-10-13 00:05:41,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1090. [2021-10-13 00:05:41,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 726 states have (on average 1.159779614325069) internal successors, (842), 774 states have internal predecessors, (842), 205 states have call successors, (214), 147 states have call predecessors, (214), 159 states have return successors, (361), 168 states have call predecessors, (361), 202 states have call successors, (361) [2021-10-13 00:05:41,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1417 transitions. [2021-10-13 00:05:41,024 INFO L704 BuchiCegarLoop]: Abstraction has 1090 states and 1417 transitions. [2021-10-13 00:05:41,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:05:41,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 00:05:41,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-10-13 00:05:41,025 INFO L87 Difference]: Start difference. First operand 1090 states and 1417 transitions. Second operand has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 12 states have internal predecessors, (43), 10 states have call successors, (13), 10 states have call predecessors, (13), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 00:05:41,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:05:41,453 INFO L93 Difference]: Finished difference Result 552 states and 696 transitions. [2021-10-13 00:05:41,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-13 00:05:41,454 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 552 states and 696 transitions. [2021-10-13 00:05:41,460 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 21 [2021-10-13 00:05:41,467 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 552 states to 499 states and 627 transitions. [2021-10-13 00:05:41,467 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 268 [2021-10-13 00:05:41,468 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 268 [2021-10-13 00:05:41,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 499 states and 627 transitions. [2021-10-13 00:05:41,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 00:05:41,468 INFO L681 BuchiCegarLoop]: Abstraction has 499 states and 627 transitions. [2021-10-13 00:05:41,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states and 627 transitions. [2021-10-13 00:05:41,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 483. [2021-10-13 00:05:41,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 320 states have (on average 1.125) internal successors, (360), 337 states have internal predecessors, (360), 95 states have call successors, (97), 66 states have call predecessors, (97), 68 states have return successors, (149), 79 states have call predecessors, (149), 89 states have call successors, (149) [2021-10-13 00:05:41,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 606 transitions. [2021-10-13 00:05:41,487 INFO L704 BuchiCegarLoop]: Abstraction has 483 states and 606 transitions. [2021-10-13 00:05:41,487 INFO L587 BuchiCegarLoop]: Abstraction has 483 states and 606 transitions. [2021-10-13 00:05:41,487 INFO L425 BuchiCegarLoop]: ======== Iteration 11============ [2021-10-13 00:05:41,487 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 483 states and 606 transitions. [2021-10-13 00:05:41,490 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 21 [2021-10-13 00:05:41,491 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:05:41,491 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:05:41,492 INFO L842 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] [2021-10-13 00:05:41,492 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:05:41,492 INFO L791 eck$LassoCheckResult]: Stem: 34377#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); 34378#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 34411#L39 call main_#t~ret11 := fibo1(main_~x~0);< 34453#fibo1ENTRY ~n := #in~n; 34514#L10 assume !(~n < 1); 34512#L12 assume !(1 == ~n); 34509#L15 call #t~ret7 := fibo2(~n - 1);< 34510#fibo2ENTRY ~n := #in~n; 34532#L20 assume !(~n < 1); 34525#L22 assume !(1 == ~n); 34521#L25 call #t~ret9 := fibo1(~n - 1);< 34522#fibo1ENTRY ~n := #in~n; 34596#L10 assume !(~n < 1); 34595#L12 assume !(1 == ~n); 34586#L15 call #t~ret7 := fibo2(~n - 1);< 34594#fibo2ENTRY ~n := #in~n; 34831#L20 assume !(~n < 1); 34830#L22 assume !(1 == ~n); 34574#L25 call #t~ret9 := fibo1(~n - 1);< 34663#fibo1ENTRY ~n := #in~n; 34823#L10 assume !(~n < 1); 34822#L12 assume !(1 == ~n); 34587#L15 call #t~ret7 := fibo2(~n - 1);< 34632#fibo2ENTRY ~n := #in~n; 34636#L20 assume !(~n < 1); 34635#L22 assume !(1 == ~n); 34429#L25 call #t~ret9 := fibo1(~n - 1);< 34589#fibo1ENTRY ~n := #in~n; 34434#L10 assume !(~n < 1); 34428#L12 assume !(1 == ~n); 34430#L15 call #t~ret7 := fibo2(~n - 1);< 34660#fibo2ENTRY ~n := #in~n; 34668#L20 assume !(~n < 1); 34667#L22 assume 1 == ~n;#res := 1; 34665#fibo2FINAL assume true; 34659#fibo2EXIT >#50#return; 34656#L15-1 call #t~ret8 := fibo2(~n - 2);< 34657#fibo2ENTRY ~n := #in~n; 34851#L20 assume ~n < 1;#res := 0; 34846#fibo2FINAL assume true; 34655#fibo2EXIT >#52#return; 34653#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 34652#fibo1FINAL assume true; 34651#fibo1EXIT >#46#return; 34647#L25-1 call #t~ret10 := fibo1(~n - 2);< 34648#fibo1ENTRY ~n := #in~n; 34661#L10 assume !(~n < 1); 34658#L12 assume 1 == ~n;#res := 1; 34654#fibo1FINAL assume true; 34646#fibo1EXIT >#48#return; 34644#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 34643#fibo2FINAL assume true; 34630#fibo2EXIT >#50#return; 34502#L15-1 call #t~ret8 := fibo2(~n - 2);< 34420#fibo2ENTRY ~n := #in~n; 34572#L20 assume !(~n < 1); 34571#L22 assume !(1 == ~n); 34418#L25 call #t~ret9 := fibo1(~n - 1);< 34499#fibo1ENTRY ~n := #in~n; 34469#L10 assume !(~n < 1); 34470#L12 assume !(1 == ~n); 34498#L15 call #t~ret7 := fibo2(~n - 1);< 34583#fibo2ENTRY ~n := #in~n; 34611#L20 assume !(~n < 1); 34770#L22 assume !(1 == ~n); 34721#L25 call #t~ret9 := fibo1(~n - 1);< 34724#fibo1ENTRY ~n := #in~n; 34803#L10 assume !(~n < 1); 34802#L12 assume !(1 == ~n); 34394#L15 [2021-10-13 00:05:41,493 INFO L793 eck$LassoCheckResult]: Loop: 34394#L15 call #t~ret7 := fibo2(~n - 1);< 34793#fibo2ENTRY ~n := #in~n; 34794#L20 assume !(~n < 1); 34834#L22 assume !(1 == ~n); 34719#L25 call #t~ret9 := fibo1(~n - 1);< 34724#fibo1ENTRY ~n := #in~n; 34803#L10 assume !(~n < 1); 34802#L12 assume !(1 == ~n); 34394#L15 [2021-10-13 00:05:41,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:41,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1054902100, now seen corresponding path program 2 times [2021-10-13 00:05:41,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:05:41,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461722116] [2021-10-13 00:05:41,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:41,494 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:05:41,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:41,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-10-13 00:05:41,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:41,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:05:41,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:41,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:05:41,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:41,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 00:05:41,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:41,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-10-13 00:05:41,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:41,714 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 92 proven. 39 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-13 00:05:41,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:05:41,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461722116] [2021-10-13 00:05:41,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461722116] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:05:41,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953462862] [2021-10-13 00:05:41,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:05:41,716 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:05:41,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:41,719 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:05:41,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-10-13 00:05:42,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:05:42,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:05:42,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 00:05:42,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:05:42,897 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 92 proven. 39 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-13 00:05:42,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953462862] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:05:42,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:05:42,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 20 [2021-10-13 00:05:42,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767306977] [2021-10-13 00:05:42,902 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-13 00:05:42,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:42,903 INFO L82 PathProgramCache]: Analyzing trace with hash 519237434, now seen corresponding path program 4 times [2021-10-13 00:05:42,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:05:42,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677949414] [2021-10-13 00:05:42,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:42,904 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:05:42,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:05:42,912 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:05:42,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:05:42,915 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:05:43,048 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:05:43,049 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:05:43,049 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:05:43,049 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:05:43,049 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-13 00:05:43,049 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:43,049 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:05:43,049 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:05:43,049 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration11_Loop [2021-10-13 00:05:43,049 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:05:43,049 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:05:43,050 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:43,059 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:43,061 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:43,063 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:43,066 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:43,068 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:43,070 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:43,072 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:43,074 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:43,142 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:05:43,142 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-13 00:05:43,142 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:43,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:43,149 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:43,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (85)] Waiting until timeout for monitored process [2021-10-13 00:05:43,151 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:05:43,151 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:05:43,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (85)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:43,188 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:43,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:43,189 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:43,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (86)] Waiting until timeout for monitored process [2021-10-13 00:05:43,192 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-13 00:05:43,192 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:05:45,358 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-13 00:05:45,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (86)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:45,361 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:05:45,362 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:05:45,362 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:05:45,362 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:05:45,362 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-13 00:05:45,362 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:45,362 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:05:45,362 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:05:45,362 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration11_Loop [2021-10-13 00:05:45,362 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:05:45,362 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:05:45,363 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:45,369 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:45,371 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:45,373 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:45,374 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:45,376 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:45,378 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:45,379 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:45,381 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:05:45,448 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:05:45,448 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-13 00:05:45,448 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:45,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:45,451 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:45,455 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 00:05:45,464 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:05:45,465 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:05:45,465 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:05:45,465 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:05:45,465 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:05:45,466 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:05:45,466 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:05:45,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (87)] Waiting until timeout for monitored process [2021-10-13 00:05:45,478 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-13 00:05:45,492 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-13 00:05:45,492 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-13 00:05:45,492 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:05:45,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:45,494 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:05:45,496 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-13 00:05:45,496 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-13 00:05:45,496 INFO L513 LassoAnalysis]: Proved termination. [2021-10-13 00:05:45,496 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] [2021-10-13 00:05:45,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (88)] Waiting until timeout for monitored process [2021-10-13 00:05:45,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (87)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:45,536 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-13 00:05:45,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:45,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:45,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-13 00:05:45,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:05:46,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (88)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:46,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:46,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 00:05:46,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:05:46,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:05:46,422 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 [2021-10-13 00:05:46,422 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 483 states and 606 transitions. cyclomatic complexity: 129 Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-13 00:05:46,548 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 483 states and 606 transitions. cyclomatic complexity: 129. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Result 524 states and 649 transitions. Complement of second has 19 states. [2021-10-13 00:05:46,548 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 [2021-10-13 00:05:46,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-13 00:05:46,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 22 transitions. [2021-10-13 00:05:46,549 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 22 transitions. Stem has 69 letters. Loop has 8 letters. [2021-10-13 00:05:46,550 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:05:46,550 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-13 00:05:46,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:46,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:46,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-13 00:05:46,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:05:47,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:47,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 00:05:47,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:05:47,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:05:47,502 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 [2021-10-13 00:05:47,503 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 483 states and 606 transitions. cyclomatic complexity: 129 Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-13 00:05:47,682 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 483 states and 606 transitions. cyclomatic complexity: 129. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Result 530 states and 655 transitions. Complement of second has 27 states. [2021-10-13 00:05:47,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2021-10-13 00:05:47,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-13 00:05:47,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 25 transitions. [2021-10-13 00:05:47,684 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 25 transitions. Stem has 69 letters. Loop has 8 letters. [2021-10-13 00:05:47,684 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:05:47,684 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-13 00:05:47,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:05:47,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:47,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-13 00:05:47,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:05:48,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:48,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 00:05:48,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:05:48,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:05:48,441 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 [2021-10-13 00:05:48,441 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 483 states and 606 transitions. cyclomatic complexity: 129 Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-13 00:05:48,575 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 483 states and 606 transitions. cyclomatic complexity: 129. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Result 825 states and 995 transitions. Complement of second has 33 states. [2021-10-13 00:05:48,575 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 [2021-10-13 00:05:48,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-13 00:05:48,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 43 transitions. [2021-10-13 00:05:48,576 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 69 letters. Loop has 8 letters. [2021-10-13 00:05:48,577 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:05:48,577 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 77 letters. Loop has 8 letters. [2021-10-13 00:05:48,578 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:05:48,578 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 69 letters. Loop has 16 letters. [2021-10-13 00:05:48,579 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:05:48,579 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 825 states and 995 transitions. [2021-10-13 00:05:48,587 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 21 [2021-10-13 00:05:48,594 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 825 states to 579 states and 719 transitions. [2021-10-13 00:05:48,594 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 270 [2021-10-13 00:05:48,595 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 314 [2021-10-13 00:05:48,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 579 states and 719 transitions. [2021-10-13 00:05:48,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 00:05:48,596 INFO L681 BuchiCegarLoop]: Abstraction has 579 states and 719 transitions. [2021-10-13 00:05:48,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states and 719 transitions. [2021-10-13 00:05:48,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 529. [2021-10-13 00:05:48,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 354 states have (on average 1.1101694915254237) internal successors, (393), 370 states have internal predecessors, (393), 102 states have call successors, (109), 77 states have call predecessors, (109), 73 states have return successors, (154), 81 states have call predecessors, (154), 96 states have call successors, (154) [2021-10-13 00:05:48,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 656 transitions. [2021-10-13 00:05:48,616 INFO L704 BuchiCegarLoop]: Abstraction has 529 states and 656 transitions. [2021-10-13 00:05:48,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:05:48,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 00:05:48,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-10-13 00:05:48,617 INFO L87 Difference]: Start difference. First operand 529 states and 656 transitions. Second operand has 20 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 12 states have internal predecessors, (46), 10 states have call successors, (15), 10 states have call predecessors, (15), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-13 00:05:49,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:05:49,026 INFO L93 Difference]: Finished difference Result 521 states and 613 transitions. [2021-10-13 00:05:49,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-13 00:05:49,027 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 521 states and 613 transitions. [2021-10-13 00:05:49,031 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-13 00:05:49,032 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 521 states to 0 states and 0 transitions. [2021-10-13 00:05:49,032 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-10-13 00:05:49,032 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-10-13 00:05:49,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-10-13 00:05:49,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 00:05:49,032 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 00:05:49,032 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 00:05:49,032 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 00:05:49,032 INFO L425 BuchiCegarLoop]: ======== Iteration 12============ [2021-10-13 00:05:49,032 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-10-13 00:05:49,033 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-13 00:05:49,033 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-10-13 00:05:49,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 13.10 12:05:49 BoogieIcfgContainer [2021-10-13 00:05:49,039 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-10-13 00:05:49,040 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 00:05:49,040 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 00:05:49,040 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 00:05:49,041 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:05:07" (3/4) ... [2021-10-13 00:05:49,044 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 00:05:49,044 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 00:05:49,045 INFO L168 Benchmark]: Toolchain (without parser) took 42370.18 ms. Allocated memory was 121.6 MB in the beginning and 371.2 MB in the end (delta: 249.6 MB). Free memory was 91.5 MB in the beginning and 163.0 MB in the end (delta: -71.4 MB). Peak memory consumption was 177.6 MB. Max. memory is 16.1 GB. [2021-10-13 00:05:49,046 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 121.6 MB. Free memory was 74.2 MB in the beginning and 74.2 MB in the end (delta: 63.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:05:49,046 INFO L168 Benchmark]: CACSL2BoogieTranslator took 393.18 ms. Allocated memory is still 121.6 MB. Free memory was 91.5 MB in the beginning and 95.8 MB in the end (delta: -4.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 00:05:49,047 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.23 ms. Allocated memory is still 121.6 MB. Free memory was 95.8 MB in the beginning and 94.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:05:49,047 INFO L168 Benchmark]: Boogie Preprocessor took 43.83 ms. Allocated memory is still 121.6 MB. Free memory was 94.5 MB in the beginning and 93.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:05:49,048 INFO L168 Benchmark]: RCFGBuilder took 427.25 ms. Allocated memory is still 121.6 MB. Free memory was 93.3 MB in the beginning and 84.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 00:05:49,048 INFO L168 Benchmark]: BuchiAutomizer took 41453.02 ms. Allocated memory was 121.6 MB in the beginning and 371.2 MB in the end (delta: 249.6 MB). Free memory was 83.8 MB in the beginning and 164.0 MB in the end (delta: -80.3 MB). Peak memory consumption was 170.9 MB. Max. memory is 16.1 GB. [2021-10-13 00:05:49,048 INFO L168 Benchmark]: Witness Printer took 4.38 ms. Allocated memory is still 371.2 MB. Free memory was 164.0 MB in the beginning and 163.0 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:05:49,051 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 121.6 MB. Free memory was 74.2 MB in the beginning and 74.2 MB in the end (delta: 63.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 393.18 ms. Allocated memory is still 121.6 MB. Free memory was 91.5 MB in the beginning and 95.8 MB in the end (delta: -4.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.23 ms. Allocated memory is still 121.6 MB. Free memory was 95.8 MB in the beginning and 94.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 43.83 ms. Allocated memory is still 121.6 MB. Free memory was 94.5 MB in the beginning and 93.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 427.25 ms. Allocated memory is still 121.6 MB. Free memory was 93.3 MB in the beginning and 84.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 41453.02 ms. Allocated memory was 121.6 MB in the beginning and 371.2 MB in the end (delta: 249.6 MB). Free memory was 83.8 MB in the beginning and 164.0 MB in the end (delta: -80.3 MB). Peak memory consumption was 170.9 MB. Max. memory is 16.1 GB. * Witness Printer took 4.38 ms. Allocated memory is still 371.2 MB. Free memory was 164.0 MB in the beginning and 163.0 MB in the end (delta: 1.0 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 16 terminating modules (10 trivial, 2 deterministic, 4 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 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 8 locations. One nondeterministic module has affine ranking function n and consists of 8 locations. 10 modules have a trivial ranking function, the largest among these consists of 20 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 41.3s and 12 iterations. TraceHistogramMax:18. Analysis of lassos took 22.4s. Construction of modules took 3.0s. Büchi inclusion checks took 14.2s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 15. Automata minimization 714.8ms AutomataMinimizationTime, 15 MinimizatonAttempts, 1197 StatesRemovedByMinimization, 15 NontrivialMinimizations. Non-live state removal took 0.5s Buchi closure took 0.0s. Biggest automaton had 2404 states and ocurred in iteration 8. Nontrivial modules had stage [2, 0, 4, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/6 HoareTripleCheckerStatistics: 531 SDtfs, 1215 SDslu, 1801 SDs, 0 SdLazy, 4129 SolverSat, 718 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3023.9ms Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI5 SILT5 lasso0 LassoPreprocessingBenchmarks: Lassos: inital16 mio100 ax100 hnf92 lsp93 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq185 hnf93 smp80 dnf100 smp100 tf110 neg96 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 41ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 23 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 6 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 5.9s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-10-13 00:05:49,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:49,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:49,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-10-13 00:05:49,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-10-13 00:05:49,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-10-13 00:05:50,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-10-13 00:05:50,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:50,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-10-13 00:05:50,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-10-13 00:05:50,916 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-10-13 00:05:51,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-10-13 00:05:51,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-13 00:05:51,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-10-13 00:05:51,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f59cebad-4dcb-49c4-971b-263d1eacbae1/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with exit code 0 Received shutdown request...