./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive/Fibonacci03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive/Fibonacci03.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa --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 be0a584ba9648c80e7a0523ff51ba530f1926c55cecd3c62f2cee05fbbff42e3 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 20:15:03,023 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 20:15:03,024 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 20:15:03,054 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 20:15:03,055 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 20:15:03,056 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 20:15:03,057 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 20:15:03,059 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 20:15:03,060 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 20:15:03,061 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 20:15:03,062 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 20:15:03,078 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 20:15:03,078 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 20:15:03,079 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 20:15:03,081 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 20:15:03,082 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 20:15:03,083 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 20:15:03,084 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 20:15:03,087 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 20:15:03,089 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 20:15:03,091 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 20:15:03,092 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 20:15:03,093 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 20:15:03,094 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 20:15:03,097 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 20:15:03,098 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 20:15:03,098 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 20:15:03,112 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 20:15:03,113 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 20:15:03,113 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 20:15:03,114 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 20:15:03,114 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 20:15:03,115 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 20:15:03,115 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 20:15:03,116 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 20:15:03,116 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 20:15:03,117 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 20:15:03,117 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 20:15:03,117 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 20:15:03,117 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 20:15:03,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 20:15:03,119 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-12-06 20:15:03,136 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 20:15:03,137 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 20:15:03,137 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 20:15:03,137 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 20:15:03,138 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 20:15:03,138 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 20:15:03,138 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 20:15:03,138 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-12-06 20:15:03,138 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-12-06 20:15:03,138 INFO L138 SettingsManager]: * Use old map elimination=false [2021-12-06 20:15:03,138 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-12-06 20:15:03,138 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-12-06 20:15:03,139 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-12-06 20:15:03,139 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 20:15:03,139 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 20:15:03,139 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 20:15:03,139 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 20:15:03,139 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 20:15:03,139 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 20:15:03,139 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-12-06 20:15:03,139 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-12-06 20:15:03,140 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-12-06 20:15:03,140 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 20:15:03,140 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 20:15:03,140 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-12-06 20:15:03,140 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 20:15:03,140 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-12-06 20:15:03,140 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 20:15:03,140 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 20:15:03,141 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 20:15:03,141 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 20:15:03,141 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 20:15:03,142 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-12-06 20:15:03,142 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_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be0a584ba9648c80e7a0523ff51ba530f1926c55cecd3c62f2cee05fbbff42e3 [2021-12-06 20:15:03,301 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 20:15:03,316 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 20:15:03,318 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 20:15:03,318 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 20:15:03,319 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 20:15:03,320 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/recursive/Fibonacci03.c [2021-12-06 20:15:03,362 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/data/e55f9d695/118e39a30fc74c7bbac0cba4ae3a41ca/FLAG7e4960191 [2021-12-06 20:15:03,751 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 20:15:03,751 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/sv-benchmarks/c/recursive/Fibonacci03.c [2021-12-06 20:15:03,755 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/data/e55f9d695/118e39a30fc74c7bbac0cba4ae3a41ca/FLAG7e4960191 [2021-12-06 20:15:03,764 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/data/e55f9d695/118e39a30fc74c7bbac0cba4ae3a41ca [2021-12-06 20:15:03,766 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 20:15:03,767 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 20:15:03,768 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 20:15:03,768 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 20:15:03,770 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 20:15:03,771 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:15:03" (1/1) ... [2021-12-06 20:15:03,772 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e09a571 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:15:03, skipping insertion in model container [2021-12-06 20:15:03,772 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:15:03" (1/1) ... [2021-12-06 20:15:03,777 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 20:15:03,785 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 20:15:03,882 WARN L230 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_f15da5ea-83c4-4838-b25d-d449a405eff9/sv-benchmarks/c/recursive/Fibonacci03.c[788,801] [2021-12-06 20:15:03,883 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:15:03,889 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 20:15:03,900 WARN L230 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_f15da5ea-83c4-4838-b25d-d449a405eff9/sv-benchmarks/c/recursive/Fibonacci03.c[788,801] [2021-12-06 20:15:03,900 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:15:03,910 INFO L208 MainTranslator]: Completed translation [2021-12-06 20:15:03,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:15:03 WrapperNode [2021-12-06 20:15:03,910 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 20:15:03,911 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 20:15:03,911 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 20:15:03,911 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 20:15:03,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:15:03" (1/1) ... [2021-12-06 20:15:03,922 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:15:03" (1/1) ... [2021-12-06 20:15:03,933 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 24 [2021-12-06 20:15:03,933 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 20:15:03,933 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 20:15:03,933 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 20:15:03,934 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 20:15:03,939 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:15:03" (1/1) ... [2021-12-06 20:15:03,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:15:03" (1/1) ... [2021-12-06 20:15:03,940 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:15:03" (1/1) ... [2021-12-06 20:15:03,940 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:15:03" (1/1) ... [2021-12-06 20:15:03,942 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:15:03" (1/1) ... [2021-12-06 20:15:03,944 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:15:03" (1/1) ... [2021-12-06 20:15:03,944 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:15:03" (1/1) ... [2021-12-06 20:15:03,945 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 20:15:03,946 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 20:15:03,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 20:15:03,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 20:15:03,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:15:03" (1/1) ... [2021-12-06 20:15:03,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:03,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:15:03,974 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 20:15:03,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-12-06 20:15:04,013 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2021-12-06 20:15:04,014 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2021-12-06 20:15:04,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 20:15:04,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 20:15:04,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 20:15:04,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 20:15:04,072 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 20:15:04,073 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 20:15:04,137 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 20:15:04,142 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 20:15:04,142 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-06 20:15:04,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:15:04 BoogieIcfgContainer [2021-12-06 20:15:04,144 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 20:15:04,144 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-12-06 20:15:04,145 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-12-06 20:15:04,148 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-12-06 20:15:04,149 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-06 20:15:04,149 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 06.12 08:15:03" (1/3) ... [2021-12-06 20:15:04,150 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@84e71e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 06.12 08:15:04, skipping insertion in model container [2021-12-06 20:15:04,150 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-06 20:15:04,150 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:15:03" (2/3) ... [2021-12-06 20:15:04,150 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@84e71e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 06.12 08:15:04, skipping insertion in model container [2021-12-06 20:15:04,150 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-06 20:15:04,150 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:15:04" (3/3) ... [2021-12-06 20:15:04,151 INFO L388 chiAutomizerObserver]: Analyzing ICFG Fibonacci03.c [2021-12-06 20:15:04,190 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-12-06 20:15:04,190 INFO L360 BuchiCegarLoop]: Hoare is false [2021-12-06 20:15:04,190 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-12-06 20:15:04,190 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-12-06 20:15:04,190 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-12-06 20:15:04,190 INFO L364 BuchiCegarLoop]: Difference is false [2021-12-06 20:15:04,190 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-12-06 20:15:04,191 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-12-06 20:15:04,202 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 20:15:04,220 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-06 20:15:04,221 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-06 20:15:04,221 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-06 20:15:04,226 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-12-06 20:15:04,226 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-12-06 20:15:04,226 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-12-06 20:15:04,227 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 20:15:04,229 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-06 20:15:04,229 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-06 20:15:04,229 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-06 20:15:04,230 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-12-06 20:15:04,230 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-12-06 20:15:04,235 INFO L791 eck$LassoCheckResult]: Stem: 7#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(14, 2);call #Ultimate.allocInit(12, 3); 14#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet6#1, main_#t~ret7#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1; 11#L29true assume !(main_~x~0#1 > 46); 15#L32true call main_#t~ret7#1 := fibonacci(main_~x~0#1);< 5#fibonacciENTRYtrue [2021-12-06 20:15:04,236 INFO L793 eck$LassoCheckResult]: Loop: 5#fibonacciENTRYtrue ~n := #in~n; 6#L17true assume !(~n < 1); 19#L19true assume !(1 == ~n); 18#L22true call #t~ret4 := fibonacci(~n - 1);< 5#fibonacciENTRYtrue [2021-12-06 20:15:04,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:15:04,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1325876, now seen corresponding path program 1 times [2021-12-06 20:15:04,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:15:04,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62532278] [2021-12-06 20:15:04,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:15:04,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:15:04,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 20:15:04,315 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 20:15:04,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 20:15:04,337 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 20:15:04,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:15:04,341 INFO L85 PathProgramCache]: Analyzing trace with hash 927646, now seen corresponding path program 1 times [2021-12-06 20:15:04,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:15:04,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909731030] [2021-12-06 20:15:04,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:15:04,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:15:04,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 20:15:04,350 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 20:15:04,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 20:15:04,357 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 20:15:04,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:15:04,359 INFO L85 PathProgramCache]: Analyzing trace with hash 408654161, now seen corresponding path program 1 times [2021-12-06 20:15:04,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:15:04,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079538823] [2021-12-06 20:15:04,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:15:04,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:15:04,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 20:15:04,373 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 20:15:04,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 20:15:04,386 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 20:15:04,490 INFO L210 LassoAnalysis]: Preferences: [2021-12-06 20:15:04,491 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-06 20:15:04,491 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-06 20:15:04,492 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-06 20:15:04,492 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-06 20:15:04,492 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:04,492 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-06 20:15:04,492 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-06 20:15:04,492 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci03.c_Iteration1_Loop [2021-12-06 20:15:04,492 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-06 20:15:04,493 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-06 20:15:04,508 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 20:15:04,513 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 20:15:04,515 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 20:15:04,517 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 20:15:04,524 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 20:15:04,570 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-06 20:15:04,571 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-06 20:15:04,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:04,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:15:04,574 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 20:15:04,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-12-06 20:15:04,576 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-06 20:15:04,576 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-06 20:15:04,589 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-06 20:15:04,589 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-06 20:15:04,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-12-06 20:15:04,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:04,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:15:04,618 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 20:15:04,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-12-06 20:15:04,619 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-06 20:15:04,619 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-06 20:15:04,627 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-06 20:15:04,627 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret5=0} Honda state: {fibonacci_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-06 20:15:04,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Ended with exit code 0 [2021-12-06 20:15:04,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:04,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:15:04,647 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 20:15:04,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-12-06 20:15:04,649 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-06 20:15:04,649 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-06 20:15:04,657 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-06 20:15:04,658 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_~n=0} Honda state: {fibonacci_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-06 20:15:04,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-12-06 20:15:04,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:04,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:15:04,677 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 20:15:04,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-12-06 20:15:04,678 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-06 20:15:04,678 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-06 20:15:04,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Ended with exit code 0 [2021-12-06 20:15:04,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:04,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:15:04,706 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 20:15:04,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-12-06 20:15:04,707 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-06 20:15:04,707 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-06 20:15:04,775 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-06 20:15:04,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Ended with exit code 0 [2021-12-06 20:15:04,777 INFO L210 LassoAnalysis]: Preferences: [2021-12-06 20:15:04,777 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-06 20:15:04,778 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-06 20:15:04,778 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-06 20:15:04,778 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-06 20:15:04,778 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:04,778 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-06 20:15:04,778 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-06 20:15:04,778 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci03.c_Iteration1_Loop [2021-12-06 20:15:04,778 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-06 20:15:04,778 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-06 20:15:04,779 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 20:15:04,782 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 20:15:04,783 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 20:15:04,785 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 20:15:04,791 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 20:15:04,821 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-06 20:15:04,826 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-06 20:15:04,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:04,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:15:04,828 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 20:15:04,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-12-06 20:15:04,830 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 [2021-12-06 20:15:04,837 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-06 20:15:04,837 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-06 20:15:04,838 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-06 20:15:04,838 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-06 20:15:04,838 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-06 20:15:04,840 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-06 20:15:04,840 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-06 20:15:04,842 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-06 20:15:04,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Ended with exit code 0 [2021-12-06 20:15:04,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:04,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:15:04,862 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 20:15:04,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-12-06 20:15:04,863 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 [2021-12-06 20:15:04,870 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-06 20:15:04,870 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-06 20:15:04,871 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-06 20:15:04,871 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-06 20:15:04,871 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-06 20:15:04,871 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-06 20:15:04,871 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-06 20:15:04,873 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-06 20:15:04,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Ended with exit code 0 [2021-12-06 20:15:04,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:04,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:15:04,892 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 20:15:04,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-12-06 20:15:04,894 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 [2021-12-06 20:15:04,901 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-06 20:15:04,901 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-06 20:15:04,901 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-06 20:15:04,901 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-06 20:15:04,901 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-06 20:15:04,902 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-06 20:15:04,902 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-06 20:15:04,904 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-06 20:15:04,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Ended with exit code 0 [2021-12-06 20:15:04,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:04,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:15:04,923 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 20:15:04,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-12-06 20:15:04,924 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 [2021-12-06 20:15:04,931 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-06 20:15:04,931 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-06 20:15:04,931 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-06 20:15:04,931 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-06 20:15:04,931 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-06 20:15:04,932 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-06 20:15:04,932 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-06 20:15:04,934 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-06 20:15:04,938 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-06 20:15:04,938 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-12-06 20:15:04,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:04,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:15:04,940 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 20:15:04,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-12-06 20:15:04,942 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-06 20:15:04,942 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-06 20:15:04,942 INFO L513 LassoAnalysis]: Proved termination. [2021-12-06 20:15:04,942 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] [2021-12-06 20:15:04,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-12-06 20:15:04,963 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-06 20:15:04,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:15:04,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:04,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 20:15:04,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:15:05,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:05,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 20:15:05,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:15:05,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Ended with exit code 0 [2021-12-06 20:15:05,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:15:05,068 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2021-12-06 20:15:05,069 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:15:05,134 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3). Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 51 states and 63 transitions. Complement of second has 12 states. [2021-12-06 20:15:05,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-12-06 20:15:05,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:15:05,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2021-12-06 20:15:05,141 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 4 letters. Loop has 4 letters. [2021-12-06 20:15:05,142 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-06 20:15:05,142 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 8 letters. Loop has 4 letters. [2021-12-06 20:15:05,142 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-06 20:15:05,142 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 4 letters. Loop has 8 letters. [2021-12-06 20:15:05,142 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-06 20:15:05,143 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 51 states and 63 transitions. [2021-12-06 20:15:05,147 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-06 20:15:05,151 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 51 states to 26 states and 35 transitions. [2021-12-06 20:15:05,152 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 18 [2021-12-06 20:15:05,152 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2021-12-06 20:15:05,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 35 transitions. [2021-12-06 20:15:05,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-06 20:15:05,153 INFO L681 BuchiCegarLoop]: Abstraction has 26 states and 35 transitions. [2021-12-06 20:15:05,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states and 35 transitions. [2021-12-06 20:15:05,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2021-12-06 20:15:05,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-06 20:15:05,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2021-12-06 20:15:05,175 INFO L704 BuchiCegarLoop]: Abstraction has 21 states and 27 transitions. [2021-12-06 20:15:05,175 INFO L587 BuchiCegarLoop]: Abstraction has 21 states and 27 transitions. [2021-12-06 20:15:05,175 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-12-06 20:15:05,175 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states and 27 transitions. [2021-12-06 20:15:05,176 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-06 20:15:05,176 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-06 20:15:05,176 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-06 20:15:05,177 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:15:05,177 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:15:05,177 INFO L791 eck$LassoCheckResult]: Stem: 140#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(14, 2);call #Ultimate.allocInit(12, 3); 141#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet6#1, main_#t~ret7#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1; 143#L29 assume !(main_~x~0#1 > 46); 131#L32 call main_#t~ret7#1 := fibonacci(main_~x~0#1);< 133#fibonacciENTRY ~n := #in~n; 134#L17 assume !(~n < 1); 139#L19 assume !(1 == ~n); 129#L22 call #t~ret4 := fibonacci(~n - 1);< 135#fibonacciENTRY ~n := #in~n; 136#L17 assume ~n < 1;#res := 0; 137#fibonacciFINAL assume true; 142#fibonacciEXIT >#34#return; 128#L22-1 [2021-12-06 20:15:05,177 INFO L793 eck$LassoCheckResult]: Loop: 128#L22-1 call #t~ret5 := fibonacci(~n - 2);< 132#fibonacciENTRY ~n := #in~n; 148#L17 assume !(~n < 1); 147#L19 assume !(1 == ~n); 130#L22 call #t~ret4 := fibonacci(~n - 1);< 132#fibonacciENTRY ~n := #in~n; 148#L17 assume ~n < 1;#res := 0; 145#fibonacciFINAL assume true; 146#fibonacciEXIT >#34#return; 128#L22-1 [2021-12-06 20:15:05,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:15:05,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1923124650, now seen corresponding path program 1 times [2021-12-06 20:15:05,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:15:05,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149188882] [2021-12-06 20:15:05,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:15:05,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:15:05,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:05,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 20:15:05,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:05,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:15:05,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:15:05,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149188882] [2021-12-06 20:15:05,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149188882] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:15:05,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:15:05,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 20:15:05,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229782359] [2021-12-06 20:15:05,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:15:05,240 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-06 20:15:05,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:15:05,240 INFO L85 PathProgramCache]: Analyzing trace with hash 481649848, now seen corresponding path program 1 times [2021-12-06 20:15:05,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:15:05,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673090491] [2021-12-06 20:15:05,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:15:05,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:15:05,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:05,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:15:05,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:05,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:15:05,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:15:05,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673090491] [2021-12-06 20:15:05,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673090491] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:15:05,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:15:05,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 20:15:05,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054778710] [2021-12-06 20:15:05,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:15:05,276 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-06 20:15:05,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:15:05,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 20:15:05,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:15:05,280 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. cyclomatic complexity: 8 Second operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 20:15:05,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:15:05,328 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2021-12-06 20:15:05,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 20:15:05,329 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 33 transitions. [2021-12-06 20:15:05,331 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-06 20:15:05,333 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 25 states and 31 transitions. [2021-12-06 20:15:05,333 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 21 [2021-12-06 20:15:05,333 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 21 [2021-12-06 20:15:05,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 31 transitions. [2021-12-06 20:15:05,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-06 20:15:05,333 INFO L681 BuchiCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-12-06 20:15:05,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 31 transitions. [2021-12-06 20:15:05,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-12-06 20:15:05,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 20:15:05,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2021-12-06 20:15:05,336 INFO L704 BuchiCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-12-06 20:15:05,336 INFO L587 BuchiCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-12-06 20:15:05,336 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-12-06 20:15:05,337 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 25 states and 31 transitions. [2021-12-06 20:15:05,337 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-06 20:15:05,337 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-06 20:15:05,337 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-06 20:15:05,338 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:15:05,338 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-12-06 20:15:05,339 INFO L791 eck$LassoCheckResult]: Stem: 215#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(14, 2);call #Ultimate.allocInit(12, 3); 216#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet6#1, main_#t~ret7#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1; 219#L29 assume !(main_~x~0#1 > 46); 204#L32 call main_#t~ret7#1 := fibonacci(main_~x~0#1);< 221#fibonacciENTRY ~n := #in~n; 210#L17 assume !(~n < 1); 214#L19 assume !(1 == ~n); 205#L22 call #t~ret4 := fibonacci(~n - 1);< 209#fibonacciENTRY ~n := #in~n; 211#L17 assume !(~n < 1); 227#L19 assume 1 == ~n;#res := 1; 226#fibonacciFINAL assume true; 225#fibonacciEXIT >#34#return; 203#L22-1 [2021-12-06 20:15:05,339 INFO L793 eck$LassoCheckResult]: Loop: 203#L22-1 call #t~ret5 := fibonacci(~n - 2);< 207#fibonacciENTRY ~n := #in~n; 208#L17 assume !(~n < 1); 213#L19 assume !(1 == ~n); 206#L22 call #t~ret4 := fibonacci(~n - 1);< 207#fibonacciENTRY ~n := #in~n; 208#L17 assume !(~n < 1); 213#L19 assume !(1 == ~n); 206#L22 call #t~ret4 := fibonacci(~n - 1);< 207#fibonacciENTRY ~n := #in~n; 208#L17 assume !(~n < 1); 213#L19 assume 1 == ~n;#res := 1; 222#fibonacciFINAL assume true; 223#fibonacciEXIT >#34#return; 203#L22-1 call #t~ret5 := fibonacci(~n - 2);< 207#fibonacciENTRY ~n := #in~n; 208#L17 assume ~n < 1;#res := 0; 212#fibonacciFINAL assume true; 217#fibonacciEXIT >#36#return; 218#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 220#fibonacciFINAL assume true; 224#fibonacciEXIT >#34#return; 203#L22-1 [2021-12-06 20:15:05,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:15:05,339 INFO L85 PathProgramCache]: Analyzing trace with hash -512653656, now seen corresponding path program 1 times [2021-12-06 20:15:05,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:15:05,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382190680] [2021-12-06 20:15:05,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:15:05,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:15:05,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 20:15:05,347 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 20:15:05,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 20:15:05,354 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 20:15:05,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:15:05,355 INFO L85 PathProgramCache]: Analyzing trace with hash 319636608, now seen corresponding path program 1 times [2021-12-06 20:15:05,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:15:05,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316402199] [2021-12-06 20:15:05,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:15:05,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:15:05,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 20:15:05,363 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 20:15:05,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 20:15:05,372 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 20:15:05,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:15:05,372 INFO L85 PathProgramCache]: Analyzing trace with hash 911295463, now seen corresponding path program 1 times [2021-12-06 20:15:05,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:15:05,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250573334] [2021-12-06 20:15:05,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:15:05,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:15:05,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:05,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 20:15:05,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:05,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 20:15:05,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:05,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 20:15:05,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:05,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 20:15:05,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:05,433 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-06 20:15:05,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:15:05,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250573334] [2021-12-06 20:15:05,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250573334] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:15:05,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272999909] [2021-12-06 20:15:05,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:15:05,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:15:05,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:15:05,435 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:15:05,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 20:15:05,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:05,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 20:15:05,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:15:05,528 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 38 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 20:15:05,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:15:05,597 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-06 20:15:05,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272999909] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:15:05,598 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:15:05,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2021-12-06 20:15:05,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859335282] [2021-12-06 20:15:05,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:15:05,760 INFO L210 LassoAnalysis]: Preferences: [2021-12-06 20:15:05,760 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-06 20:15:05,760 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-06 20:15:05,760 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-06 20:15:05,760 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-06 20:15:05,761 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:05,761 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-06 20:15:05,761 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-06 20:15:05,761 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci03.c_Iteration3_Loop [2021-12-06 20:15:05,761 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-06 20:15:05,761 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-06 20:15:05,761 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 20:15:05,763 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 20:15:05,764 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 20:15:05,765 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 20:15:05,802 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-06 20:15:05,802 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-06 20:15:05,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:05,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:15:05,803 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 20:15:05,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-12-06 20:15:05,805 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-06 20:15:05,805 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-06 20:15:05,815 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-06 20:15:05,815 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret5=0} Honda state: {fibonacci_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-06 20:15:05,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Ended with exit code 0 [2021-12-06 20:15:05,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:05,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:15:05,834 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 20:15:05,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-12-06 20:15:05,835 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-06 20:15:05,835 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-06 20:15:05,843 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-06 20:15:05,843 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-06 20:15:05,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Ended with exit code 0 [2021-12-06 20:15:05,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:05,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:15:05,862 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 20:15:05,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-12-06 20:15:05,863 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-06 20:15:05,863 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-06 20:15:05,872 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-06 20:15:05,872 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret4=1} Honda state: {fibonacci_#t~ret4=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-06 20:15:05,890 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Ended with exit code 0 [2021-12-06 20:15:05,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:05,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:15:05,891 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 20:15:05,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-12-06 20:15:05,892 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-06 20:15:05,892 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-06 20:15:05,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-12-06 20:15:05,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:05,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:15:05,923 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 20:15:05,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-12-06 20:15:05,924 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-06 20:15:05,924 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-06 20:15:06,638 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-06 20:15:06,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Ended with exit code 0 [2021-12-06 20:15:06,640 INFO L210 LassoAnalysis]: Preferences: [2021-12-06 20:15:06,640 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-06 20:15:06,641 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-06 20:15:06,641 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-06 20:15:06,641 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-06 20:15:06,641 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:06,641 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-06 20:15:06,641 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-06 20:15:06,641 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci03.c_Iteration3_Loop [2021-12-06 20:15:06,641 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-06 20:15:06,641 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-06 20:15:06,642 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 20:15:06,643 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 20:15:06,651 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 20:15:06,652 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 20:15:06,689 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-06 20:15:06,689 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-06 20:15:06,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:06,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:15:06,690 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 20:15:06,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-12-06 20:15:06,726 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 [2021-12-06 20:15:06,733 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-06 20:15:06,733 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-06 20:15:06,733 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-06 20:15:06,733 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-06 20:15:06,733 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-06 20:15:06,734 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-06 20:15:06,734 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-06 20:15:06,735 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-06 20:15:06,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Ended with exit code 0 [2021-12-06 20:15:06,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:06,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:15:06,754 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 20:15:06,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-12-06 20:15:06,755 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 [2021-12-06 20:15:06,762 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-06 20:15:06,762 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-06 20:15:06,762 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-06 20:15:06,762 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-06 20:15:06,762 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-06 20:15:06,763 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-06 20:15:06,763 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-06 20:15:06,764 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-06 20:15:06,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Ended with exit code 0 [2021-12-06 20:15:06,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:06,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:15:06,784 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 20:15:06,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-12-06 20:15:06,785 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 [2021-12-06 20:15:06,792 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-06 20:15:06,792 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-06 20:15:06,792 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-06 20:15:06,792 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-06 20:15:06,792 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-06 20:15:06,793 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-06 20:15:06,793 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-06 20:15:06,796 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-06 20:15:06,814 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Ended with exit code 0 [2021-12-06 20:15:06,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:06,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:15:06,815 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 20:15:06,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2021-12-06 20:15:06,817 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 [2021-12-06 20:15:06,823 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-06 20:15:06,823 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-06 20:15:06,824 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-06 20:15:06,824 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-06 20:15:06,824 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-06 20:15:06,825 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-06 20:15:06,825 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-06 20:15:06,827 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-06 20:15:06,829 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-06 20:15:06,829 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-12-06 20:15:06,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:06,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:15:06,830 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 20:15:06,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2021-12-06 20:15:06,831 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-06 20:15:06,831 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-06 20:15:06,831 INFO L513 LassoAnalysis]: Proved termination. [2021-12-06 20:15:06,831 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2021-12-06 20:15:06,849 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Ended with exit code 0 [2021-12-06 20:15:06,850 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-06 20:15:06,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:15:06,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:06,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 20:15:06,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:15:06,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:06,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 20:15:06,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:15:07,018 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 20:15:07,019 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2021-12-06 20:15:07,019 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 25 states and 31 transitions. cyclomatic complexity: 8 Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 20:15:07,148 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 25 states and 31 transitions. cyclomatic complexity: 8. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Result 160 states and 216 transitions. Complement of second has 48 states. [2021-12-06 20:15:07,148 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 [2021-12-06 20:15:07,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 20:15:07,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 42 transitions. [2021-12-06 20:15:07,149 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 42 transitions. Stem has 13 letters. Loop has 22 letters. [2021-12-06 20:15:07,151 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-06 20:15:07,151 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 42 transitions. Stem has 35 letters. Loop has 22 letters. [2021-12-06 20:15:07,151 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-06 20:15:07,151 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 42 transitions. Stem has 13 letters. Loop has 44 letters. [2021-12-06 20:15:07,153 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-06 20:15:07,153 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 160 states and 216 transitions. [2021-12-06 20:15:07,159 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2021-12-06 20:15:07,163 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 160 states to 129 states and 181 transitions. [2021-12-06 20:15:07,163 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 75 [2021-12-06 20:15:07,163 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 80 [2021-12-06 20:15:07,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 129 states and 181 transitions. [2021-12-06 20:15:07,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-06 20:15:07,164 INFO L681 BuchiCegarLoop]: Abstraction has 129 states and 181 transitions. [2021-12-06 20:15:07,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states and 181 transitions. [2021-12-06 20:15:07,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 107. [2021-12-06 20:15:07,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 71 states have internal predecessors, (82), 25 states have call successors, (26), 13 states have call predecessors, (26), 15 states have return successors, (33), 22 states have call predecessors, (33), 23 states have call successors, (33) [2021-12-06 20:15:07,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 141 transitions. [2021-12-06 20:15:07,175 INFO L704 BuchiCegarLoop]: Abstraction has 107 states and 141 transitions. [2021-12-06 20:15:07,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:15:07,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 20:15:07,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-06 20:15:07,176 INFO L87 Difference]: Start difference. First operand 107 states and 141 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 20:15:07,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:15:07,207 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2021-12-06 20:15:07,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 20:15:07,208 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 45 states and 58 transitions. [2021-12-06 20:15:07,209 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-06 20:15:07,210 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 45 states to 42 states and 54 transitions. [2021-12-06 20:15:07,211 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 35 [2021-12-06 20:15:07,211 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 35 [2021-12-06 20:15:07,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 54 transitions. [2021-12-06 20:15:07,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-06 20:15:07,211 INFO L681 BuchiCegarLoop]: Abstraction has 42 states and 54 transitions. [2021-12-06 20:15:07,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states and 54 transitions. [2021-12-06 20:15:07,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2021-12-06 20:15:07,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 28 states have internal predecessors, (29), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-06 20:15:07,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2021-12-06 20:15:07,214 INFO L704 BuchiCegarLoop]: Abstraction has 39 states and 48 transitions. [2021-12-06 20:15:07,214 INFO L587 BuchiCegarLoop]: Abstraction has 39 states and 48 transitions. [2021-12-06 20:15:07,214 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-12-06 20:15:07,214 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 39 states and 48 transitions. [2021-12-06 20:15:07,215 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-06 20:15:07,215 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-06 20:15:07,215 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-06 20:15:07,217 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:15:07,217 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-12-06 20:15:07,217 INFO L791 eck$LassoCheckResult]: Stem: 991#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(14, 2);call #Ultimate.allocInit(12, 3); 992#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet6#1, main_#t~ret7#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1; 995#L29 assume !(main_~x~0#1 > 46); 981#L32 call main_#t~ret7#1 := fibonacci(main_~x~0#1);< 983#fibonacciENTRY ~n := #in~n; 984#L17 assume !(~n < 1); 990#L19 assume !(1 == ~n); 980#L22 call #t~ret4 := fibonacci(~n - 1);< 982#fibonacciENTRY ~n := #in~n; 986#L17 assume !(~n < 1); 1013#L19 assume !(1 == ~n); 985#L22 call #t~ret4 := fibonacci(~n - 1);< 982#fibonacciENTRY ~n := #in~n; 987#L17 assume !(~n < 1); 997#L19 assume 1 == ~n;#res := 1; 998#fibonacciFINAL assume true; 1012#fibonacciEXIT >#34#return; 1007#L22-1 call #t~ret5 := fibonacci(~n - 2);< 1008#fibonacciENTRY ~n := #in~n; 1011#L17 assume ~n < 1;#res := 0; 1009#fibonacciFINAL assume true; 1006#fibonacciEXIT >#36#return; 1005#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 1004#fibonacciFINAL assume true; 1003#fibonacciEXIT >#34#return; 977#L22-1 [2021-12-06 20:15:07,217 INFO L793 eck$LassoCheckResult]: Loop: 977#L22-1 call #t~ret5 := fibonacci(~n - 2);< 979#fibonacciENTRY ~n := #in~n; 1002#L17 assume !(~n < 1); 1000#L19 assume !(1 == ~n); 976#L22 call #t~ret4 := fibonacci(~n - 1);< 979#fibonacciENTRY ~n := #in~n; 1002#L17 assume !(~n < 1); 1000#L19 assume !(1 == ~n); 976#L22 call #t~ret4 := fibonacci(~n - 1);< 979#fibonacciENTRY ~n := #in~n; 1002#L17 assume !(~n < 1); 1000#L19 assume 1 == ~n;#res := 1; 1001#fibonacciFINAL assume true; 1010#fibonacciEXIT >#34#return; 975#L22-1 call #t~ret5 := fibonacci(~n - 2);< 978#fibonacciENTRY ~n := #in~n; 988#L17 assume ~n < 1;#res := 0; 989#fibonacciFINAL assume true; 993#fibonacciEXIT >#36#return; 994#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 996#fibonacciFINAL assume true; 999#fibonacciEXIT >#34#return; 977#L22-1 [2021-12-06 20:15:07,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:15:07,217 INFO L85 PathProgramCache]: Analyzing trace with hash 506180814, now seen corresponding path program 2 times [2021-12-06 20:15:07,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:15:07,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282186937] [2021-12-06 20:15:07,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:15:07,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:15:07,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 20:15:07,225 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 20:15:07,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 20:15:07,234 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 20:15:07,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:15:07,234 INFO L85 PathProgramCache]: Analyzing trace with hash 319636608, now seen corresponding path program 2 times [2021-12-06 20:15:07,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:15:07,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407710277] [2021-12-06 20:15:07,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:15:07,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:15:07,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 20:15:07,240 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 20:15:07,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 20:15:07,246 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 20:15:07,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:15:07,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1200508531, now seen corresponding path program 3 times [2021-12-06 20:15:07,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:15:07,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805114253] [2021-12-06 20:15:07,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:15:07,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:15:07,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:07,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 20:15:07,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:07,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 20:15:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:07,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 20:15:07,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:07,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 20:15:07,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:07,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 20:15:07,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:07,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 20:15:07,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:07,330 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 16 proven. 46 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-06 20:15:07,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:15:07,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805114253] [2021-12-06 20:15:07,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805114253] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:15:07,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334666046] [2021-12-06 20:15:07,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:15:07,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:15:07,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:15:07,331 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:15:07,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 20:15:07,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-06 20:15:07,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:15:07,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 20:15:07,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:15:07,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2021-12-06 20:15:07,453 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 35 proven. 47 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-06 20:15:07,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:15:07,666 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 35 proven. 49 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-06 20:15:07,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334666046] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:15:07,666 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:15:07,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 12] total 21 [2021-12-06 20:15:07,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239899686] [2021-12-06 20:15:07,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:15:07,798 INFO L210 LassoAnalysis]: Preferences: [2021-12-06 20:15:07,798 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-06 20:15:07,798 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-06 20:15:07,798 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-06 20:15:07,798 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-06 20:15:07,798 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:07,798 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-06 20:15:07,798 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-06 20:15:07,798 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci03.c_Iteration4_Loop [2021-12-06 20:15:07,798 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-06 20:15:07,798 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-06 20:15:07,799 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 20:15:07,800 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 20:15:07,802 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 20:15:07,803 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 20:15:07,818 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-06 20:15:07,818 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-06 20:15:07,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:07,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:15:07,819 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 20:15:07,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2021-12-06 20:15:07,820 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-06 20:15:07,820 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-06 20:15:07,828 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-06 20:15:07,828 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-06 20:15:07,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Ended with exit code 0 [2021-12-06 20:15:07,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:07,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:15:07,847 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 20:15:07,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2021-12-06 20:15:07,848 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-06 20:15:07,849 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-06 20:15:07,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2021-12-06 20:15:07,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:07,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:15:07,879 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 20:15:07,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2021-12-06 20:15:07,880 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-06 20:15:07,880 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-06 20:15:08,613 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-06 20:15:08,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2021-12-06 20:15:08,616 INFO L210 LassoAnalysis]: Preferences: [2021-12-06 20:15:08,616 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-06 20:15:08,616 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-06 20:15:08,616 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-06 20:15:08,616 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-06 20:15:08,616 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:08,616 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-06 20:15:08,617 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-06 20:15:08,617 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci03.c_Iteration4_Loop [2021-12-06 20:15:08,617 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-06 20:15:08,617 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-06 20:15:08,617 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 20:15:08,619 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 20:15:08,622 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 20:15:08,623 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 20:15:08,639 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-06 20:15:08,639 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-06 20:15:08,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:08,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:15:08,640 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 20:15:08,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-12-06 20:15:08,644 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 [2021-12-06 20:15:08,651 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-06 20:15:08,651 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-06 20:15:08,651 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-06 20:15:08,651 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-06 20:15:08,651 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-06 20:15:08,652 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-06 20:15:08,652 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-06 20:15:08,652 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-06 20:15:08,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Ended with exit code 0 [2021-12-06 20:15:08,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:08,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:15:08,672 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 20:15:08,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-12-06 20:15:08,673 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 [2021-12-06 20:15:08,679 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-06 20:15:08,679 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-06 20:15:08,680 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-06 20:15:08,680 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-06 20:15:08,680 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-06 20:15:08,681 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-06 20:15:08,681 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-06 20:15:08,683 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-06 20:15:08,685 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-06 20:15:08,685 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-12-06 20:15:08,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:08,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:15:08,686 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 20:15:08,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2021-12-06 20:15:08,687 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-06 20:15:08,687 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-06 20:15:08,687 INFO L513 LassoAnalysis]: Proved termination. [2021-12-06 20:15:08,687 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2021-12-06 20:15:08,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Ended with exit code 0 [2021-12-06 20:15:08,706 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-06 20:15:08,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:15:08,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:08,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 20:15:08,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:15:08,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:08,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 20:15:08,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:15:08,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Ended with exit code 0 [2021-12-06 20:15:09,001 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 20:15:09,001 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2021-12-06 20:15:09,002 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 39 states and 48 transitions. cyclomatic complexity: 11 Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 20:15:09,053 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 39 states and 48 transitions. cyclomatic complexity: 11. Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 46 states and 55 transitions. Complement of second has 11 states. [2021-12-06 20:15:09,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2021-12-06 20:15:09,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 20:15:09,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 18 transitions. [2021-12-06 20:15:09,054 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 18 transitions. Stem has 25 letters. Loop has 22 letters. [2021-12-06 20:15:09,054 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-06 20:15:09,054 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-06 20:15:09,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:15:09,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:09,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 20:15:09,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:15:09,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:09,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 20:15:09,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:15:09,297 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 20:15:09,298 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 7 loop predicates [2021-12-06 20:15:09,298 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 39 states and 48 transitions. cyclomatic complexity: 11 Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 20:15:09,353 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 39 states and 48 transitions. cyclomatic complexity: 11. Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 46 states and 55 transitions. Complement of second has 11 states. [2021-12-06 20:15:09,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2021-12-06 20:15:09,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 20:15:09,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 18 transitions. [2021-12-06 20:15:09,354 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 18 transitions. Stem has 25 letters. Loop has 22 letters. [2021-12-06 20:15:09,355 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-06 20:15:09,355 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-06 20:15:09,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:15:09,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:09,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 20:15:09,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:15:09,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:09,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 20:15:09,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:15:09,635 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 20:15:09,636 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 7 loop predicates [2021-12-06 20:15:09,636 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 39 states and 48 transitions. cyclomatic complexity: 11 Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 20:15:09,775 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 39 states and 48 transitions. cyclomatic complexity: 11. Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 345 states and 444 transitions. Complement of second has 125 states. [2021-12-06 20:15:09,776 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 [2021-12-06 20:15:09,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 20:15:09,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 47 transitions. [2021-12-06 20:15:09,777 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 47 transitions. Stem has 25 letters. Loop has 22 letters. [2021-12-06 20:15:09,779 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-06 20:15:09,779 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 47 transitions. Stem has 47 letters. Loop has 22 letters. [2021-12-06 20:15:09,780 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-06 20:15:09,780 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 47 transitions. Stem has 25 letters. Loop has 44 letters. [2021-12-06 20:15:09,782 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-06 20:15:09,782 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 345 states and 444 transitions. [2021-12-06 20:15:09,790 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-12-06 20:15:09,795 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 345 states to 220 states and 297 transitions. [2021-12-06 20:15:09,795 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 99 [2021-12-06 20:15:09,796 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 116 [2021-12-06 20:15:09,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 220 states and 297 transitions. [2021-12-06 20:15:09,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-06 20:15:09,796 INFO L681 BuchiCegarLoop]: Abstraction has 220 states and 297 transitions. [2021-12-06 20:15:09,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states and 297 transitions. [2021-12-06 20:15:09,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 172. [2021-12-06 20:15:09,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 107 states have (on average 1.1401869158878504) internal successors, (122), 112 states have internal predecessors, (122), 38 states have call successors, (42), 23 states have call predecessors, (42), 27 states have return successors, (59), 36 states have call predecessors, (59), 36 states have call successors, (59) [2021-12-06 20:15:09,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 223 transitions. [2021-12-06 20:15:09,810 INFO L704 BuchiCegarLoop]: Abstraction has 172 states and 223 transitions. [2021-12-06 20:15:09,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:15:09,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 20:15:09,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-12-06 20:15:09,811 INFO L87 Difference]: Start difference. First operand 172 states and 223 transitions. Second operand has 21 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 18 states have internal predecessors, (50), 13 states have call successors, (17), 3 states have call predecessors, (17), 7 states have return successors, (16), 10 states have call predecessors, (16), 11 states have call successors, (16) [2021-12-06 20:15:09,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:15:09,960 INFO L93 Difference]: Finished difference Result 349 states and 503 transitions. [2021-12-06 20:15:09,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 20:15:09,961 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 349 states and 503 transitions. [2021-12-06 20:15:09,969 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-12-06 20:15:09,978 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 349 states to 339 states and 490 transitions. [2021-12-06 20:15:09,978 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 173 [2021-12-06 20:15:09,979 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 193 [2021-12-06 20:15:09,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 339 states and 490 transitions. [2021-12-06 20:15:09,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-06 20:15:09,979 INFO L681 BuchiCegarLoop]: Abstraction has 339 states and 490 transitions. [2021-12-06 20:15:09,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states and 490 transitions. [2021-12-06 20:15:10,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 274. [2021-12-06 20:15:10,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 171 states have (on average 1.128654970760234) internal successors, (193), 174 states have internal predecessors, (193), 60 states have call successors, (72), 36 states have call predecessors, (72), 43 states have return successors, (136), 63 states have call predecessors, (136), 58 states have call successors, (136) [2021-12-06 20:15:10,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 401 transitions. [2021-12-06 20:15:10,004 INFO L704 BuchiCegarLoop]: Abstraction has 274 states and 401 transitions. [2021-12-06 20:15:10,004 INFO L587 BuchiCegarLoop]: Abstraction has 274 states and 401 transitions. [2021-12-06 20:15:10,004 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-12-06 20:15:10,004 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 274 states and 401 transitions. [2021-12-06 20:15:10,007 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-12-06 20:15:10,008 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-06 20:15:10,008 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-06 20:15:10,010 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [12, 10, 9, 7, 7, 5, 5, 4, 4, 3, 2, 1, 1, 1, 1] [2021-12-06 20:15:10,010 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-12-06 20:15:10,010 INFO L791 eck$LassoCheckResult]: Stem: 3005#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(14, 2);call #Ultimate.allocInit(12, 3); 3006#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet6#1, main_#t~ret7#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1; 3010#L29 assume !(main_~x~0#1 > 46); 3011#L32 call main_#t~ret7#1 := fibonacci(main_~x~0#1);< 3015#fibonacciENTRY ~n := #in~n; 3048#L17 assume !(~n < 1); 3046#L19 assume !(1 == ~n); 3038#L22 call #t~ret4 := fibonacci(~n - 1);< 3041#fibonacciENTRY ~n := #in~n; 3047#L17 assume !(~n < 1); 3045#L19 assume !(1 == ~n); 3039#L22 call #t~ret4 := fibonacci(~n - 1);< 3041#fibonacciENTRY ~n := #in~n; 3047#L17 assume !(~n < 1); 3045#L19 assume !(1 == ~n); 3039#L22 call #t~ret4 := fibonacci(~n - 1);< 3041#fibonacciENTRY ~n := #in~n; 3047#L17 assume !(~n < 1); 3045#L19 assume !(1 == ~n); 3039#L22 call #t~ret4 := fibonacci(~n - 1);< 3041#fibonacciENTRY ~n := #in~n; 3049#L17 assume !(~n < 1); 3145#L19 assume 1 == ~n;#res := 1; 3144#fibonacciFINAL assume true; 3142#fibonacciEXIT >#34#return; 3135#L22-1 call #t~ret5 := fibonacci(~n - 2);< 3137#fibonacciENTRY ~n := #in~n; 3143#L17 assume ~n < 1;#res := 0; 3138#fibonacciFINAL assume true; 3134#fibonacciEXIT >#36#return; 3133#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 3132#fibonacciFINAL assume true; 3129#fibonacciEXIT >#34#return; 3077#L22-1 call #t~ret5 := fibonacci(~n - 2);< 3079#fibonacciENTRY ~n := #in~n; 3127#L17 assume !(~n < 1); 3123#L19 assume 1 == ~n;#res := 1; 3026#fibonacciFINAL assume true; 3076#fibonacciEXIT >#36#return; 3072#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 3064#fibonacciFINAL assume true; 3054#fibonacciEXIT >#34#return; 3053#L22-1 call #t~ret5 := fibonacci(~n - 2);< 3056#fibonacciENTRY ~n := #in~n; 3128#L17 assume !(~n < 1); 3124#L19 assume !(1 == ~n); 3125#L22 call #t~ret4 := fibonacci(~n - 1);< 3238#fibonacciENTRY ~n := #in~n; 3185#L17 assume !(~n < 1); 3186#L19 assume 1 == ~n;#res := 1; 3239#fibonacciFINAL assume true; 3236#fibonacciEXIT >#34#return; 3068#L22-1 call #t~ret5 := fibonacci(~n - 2);< 3071#fibonacciENTRY ~n := #in~n; 3130#L17 assume ~n < 1;#res := 0; 3081#fibonacciFINAL assume true; 3067#fibonacciEXIT >#36#return; 3070#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 3063#fibonacciFINAL assume true; 3052#fibonacciEXIT >#36#return; 3040#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 3043#fibonacciFINAL assume true; 3037#fibonacciEXIT >#34#return; 3025#L22-1 call #t~ret5 := fibonacci(~n - 2);< 3031#fibonacciENTRY ~n := #in~n; 3032#L17 assume !(~n < 1); 3023#L19 assume !(1 == ~n); 2996#L22 call #t~ret4 := fibonacci(~n - 1);< 3235#fibonacciENTRY ~n := #in~n; 2994#L17 assume !(~n < 1); 2997#L19 assume !(1 == ~n); 3206#L22 call #t~ret4 := fibonacci(~n - 1);< 3207#fibonacciENTRY [2021-12-06 20:15:10,010 INFO L793 eck$LassoCheckResult]: Loop: 3207#fibonacciENTRY ~n := #in~n; 3218#L17 assume !(~n < 1); 3215#L19 assume !(1 == ~n); 3205#L22 call #t~ret4 := fibonacci(~n - 1);< 3207#fibonacciENTRY [2021-12-06 20:15:10,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:15:10,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1489009265, now seen corresponding path program 4 times [2021-12-06 20:15:10,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:15:10,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443601833] [2021-12-06 20:15:10,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:15:10,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:15:10,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 20:15:10,029 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 20:15:10,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 20:15:10,050 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 20:15:10,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:15:10,050 INFO L85 PathProgramCache]: Analyzing trace with hash 927646, now seen corresponding path program 2 times [2021-12-06 20:15:10,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:15:10,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218093274] [2021-12-06 20:15:10,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:15:10,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:15:10,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 20:15:10,054 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 20:15:10,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 20:15:10,056 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 20:15:10,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:15:10,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1238644268, now seen corresponding path program 5 times [2021-12-06 20:15:10,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:15:10,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653396500] [2021-12-06 20:15:10,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:15:10,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:15:10,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:10,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 20:15:10,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:10,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 20:15:10,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:10,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 20:15:10,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:10,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 20:15:10,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:10,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 20:15:10,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:10,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 20:15:10,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:10,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 20:15:10,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:10,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 20:15:10,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:10,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 20:15:10,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:10,228 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 110 proven. 115 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-06 20:15:10,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:15:10,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653396500] [2021-12-06 20:15:10,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653396500] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:15:10,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813012775] [2021-12-06 20:15:10,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:15:10,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:15:10,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:15:10,229 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:15:10,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-06 20:15:10,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-06 20:15:10,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:15:10,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 20:15:10,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:15:10,351 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 115 proven. 109 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-06 20:15:10,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:15:10,619 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 115 proven. 121 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-06 20:15:10,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813012775] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:15:10,620 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:15:10,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 16] total 21 [2021-12-06 20:15:10,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956020292] [2021-12-06 20:15:10,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:15:10,642 INFO L210 LassoAnalysis]: Preferences: [2021-12-06 20:15:10,642 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-06 20:15:10,642 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-06 20:15:10,642 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-06 20:15:10,642 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-06 20:15:10,642 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:10,642 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-06 20:15:10,642 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-06 20:15:10,642 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci03.c_Iteration5_Loop [2021-12-06 20:15:10,642 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-06 20:15:10,642 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-06 20:15:10,643 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 20:15:10,643 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 20:15:10,644 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 20:15:10,645 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 20:15:10,648 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 20:15:10,666 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-06 20:15:10,666 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-06 20:15:10,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:10,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:15:10,667 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 20:15:10,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2021-12-06 20:15:10,668 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-06 20:15:10,668 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-06 20:15:10,676 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-06 20:15:10,676 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret4=0} Honda state: {fibonacci_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-06 20:15:10,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Ended with exit code 0 [2021-12-06 20:15:10,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:10,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:15:10,695 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 20:15:10,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2021-12-06 20:15:10,696 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-06 20:15:10,696 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-06 20:15:10,706 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-06 20:15:10,706 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret5=0} Honda state: {fibonacci_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-06 20:15:10,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Ended with exit code 0 [2021-12-06 20:15:10,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:10,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:15:10,733 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 20:15:10,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2021-12-06 20:15:10,734 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-06 20:15:10,734 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-06 20:15:10,742 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-06 20:15:10,742 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-06 20:15:10,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Forceful destruction successful, exit code 0 [2021-12-06 20:15:10,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:10,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:15:10,761 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 20:15:10,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2021-12-06 20:15:10,762 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-06 20:15:10,762 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-06 20:15:10,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Ended with exit code 0 [2021-12-06 20:15:10,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:10,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:15:10,789 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 20:15:10,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2021-12-06 20:15:10,790 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-06 20:15:10,791 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-06 20:15:10,820 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-06 20:15:10,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Ended with exit code 0 [2021-12-06 20:15:10,822 INFO L210 LassoAnalysis]: Preferences: [2021-12-06 20:15:10,822 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-06 20:15:10,822 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-06 20:15:10,822 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-06 20:15:10,822 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-06 20:15:10,822 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:10,822 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-06 20:15:10,822 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-06 20:15:10,822 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci03.c_Iteration5_Loop [2021-12-06 20:15:10,822 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-06 20:15:10,822 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-06 20:15:10,823 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 20:15:10,824 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 20:15:10,825 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 20:15:10,828 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 20:15:10,829 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 20:15:10,846 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-06 20:15:10,846 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-06 20:15:10,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:10,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:15:10,846 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 20:15:10,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2021-12-06 20:15:10,847 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 [2021-12-06 20:15:10,854 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-06 20:15:10,854 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-06 20:15:10,854 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-06 20:15:10,855 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-06 20:15:10,855 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-06 20:15:10,855 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-06 20:15:10,855 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-06 20:15:10,856 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-06 20:15:10,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Ended with exit code 0 [2021-12-06 20:15:10,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:10,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:15:10,875 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 20:15:10,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Waiting until timeout for monitored process [2021-12-06 20:15:10,876 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 [2021-12-06 20:15:10,883 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-06 20:15:10,883 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-06 20:15:10,883 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-06 20:15:10,883 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-06 20:15:10,883 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-06 20:15:10,884 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-06 20:15:10,884 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-06 20:15:10,885 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-06 20:15:10,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Ended with exit code 0 [2021-12-06 20:15:10,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:10,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:15:10,903 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 20:15:10,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Waiting until timeout for monitored process [2021-12-06 20:15:10,904 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 [2021-12-06 20:15:10,911 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-06 20:15:10,912 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-06 20:15:10,912 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-06 20:15:10,912 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-06 20:15:10,912 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-06 20:15:10,912 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-06 20:15:10,912 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-06 20:15:10,914 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-06 20:15:10,916 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-06 20:15:10,917 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-12-06 20:15:10,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 20:15:10,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:15:10,917 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 20:15:10,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Waiting until timeout for monitored process [2021-12-06 20:15:10,918 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-06 20:15:10,918 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-06 20:15:10,918 INFO L513 LassoAnalysis]: Proved termination. [2021-12-06 20:15:10,918 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] [2021-12-06 20:15:10,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Forceful destruction successful, exit code 0 [2021-12-06 20:15:10,936 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-06 20:15:10,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:15:10,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:10,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 20:15:10,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:15:11,129 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Ended with exit code 0 [2021-12-06 20:15:11,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:11,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 20:15:11,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:15:11,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:15:11,373 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2021-12-06 20:15:11,373 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 274 states and 401 transitions. cyclomatic complexity: 131 Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 20:15:11,403 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 274 states and 401 transitions. cyclomatic complexity: 131. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 296 states and 427 transitions. Complement of second has 13 states. [2021-12-06 20:15:11,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2021-12-06 20:15:11,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 20:15:11,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 14 transitions. [2021-12-06 20:15:11,405 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 72 letters. Loop has 4 letters. [2021-12-06 20:15:11,405 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-06 20:15:11,405 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-06 20:15:11,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:15:11,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:11,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 20:15:11,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:15:11,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:11,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 20:15:11,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:15:11,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:15:11,850 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2021-12-06 20:15:11,851 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 274 states and 401 transitions. cyclomatic complexity: 131 Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 20:15:11,878 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 274 states and 401 transitions. cyclomatic complexity: 131. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 296 states and 427 transitions. Complement of second has 13 states. [2021-12-06 20:15:11,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2021-12-06 20:15:11,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 20:15:11,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 14 transitions. [2021-12-06 20:15:11,879 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 72 letters. Loop has 4 letters. [2021-12-06 20:15:11,879 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-06 20:15:11,880 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-06 20:15:11,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:15:11,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:11,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 20:15:11,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:15:12,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:12,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 20:15:12,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:15:12,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:15:12,280 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2021-12-06 20:15:12,280 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 274 states and 401 transitions. cyclomatic complexity: 131 Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 20:15:12,314 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 274 states and 401 transitions. cyclomatic complexity: 131. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 349 states and 484 transitions. Complement of second has 14 states. [2021-12-06 20:15:12,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2021-12-06 20:15:12,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 20:15:12,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 22 transitions. [2021-12-06 20:15:12,316 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 22 transitions. Stem has 72 letters. Loop has 4 letters. [2021-12-06 20:15:12,316 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-06 20:15:12,316 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 22 transitions. Stem has 76 letters. Loop has 4 letters. [2021-12-06 20:15:12,316 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-06 20:15:12,316 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 22 transitions. Stem has 72 letters. Loop has 8 letters. [2021-12-06 20:15:12,317 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-06 20:15:12,317 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 349 states and 484 transitions. [2021-12-06 20:15:12,320 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-12-06 20:15:12,324 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 349 states to 288 states and 417 transitions. [2021-12-06 20:15:12,324 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 138 [2021-12-06 20:15:12,324 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 143 [2021-12-06 20:15:12,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 288 states and 417 transitions. [2021-12-06 20:15:12,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-06 20:15:12,325 INFO L681 BuchiCegarLoop]: Abstraction has 288 states and 417 transitions. [2021-12-06 20:15:12,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states and 417 transitions. [2021-12-06 20:15:12,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 280. [2021-12-06 20:15:12,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 176 states have (on average 1.125) internal successors, (198), 179 states have internal predecessors, (198), 61 states have call successors, (73), 37 states have call predecessors, (73), 43 states have return successors, (138), 63 states have call predecessors, (138), 59 states have call successors, (138) [2021-12-06 20:15:12,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 409 transitions. [2021-12-06 20:15:12,335 INFO L704 BuchiCegarLoop]: Abstraction has 280 states and 409 transitions. [2021-12-06 20:15:12,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:15:12,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 20:15:12,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2021-12-06 20:15:12,336 INFO L87 Difference]: Start difference. First operand 280 states and 409 transitions. Second operand has 21 states, 16 states have (on average 2.875) internal successors, (46), 17 states have internal predecessors, (46), 15 states have call successors, (19), 5 states have call predecessors, (19), 6 states have return successors, (19), 10 states have call predecessors, (19), 11 states have call successors, (19) [2021-12-06 20:15:12,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:15:12,466 INFO L93 Difference]: Finished difference Result 408 states and 601 transitions. [2021-12-06 20:15:12,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 20:15:12,467 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 408 states and 601 transitions. [2021-12-06 20:15:12,471 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-12-06 20:15:12,471 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 408 states to 0 states and 0 transitions. [2021-12-06 20:15:12,471 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-12-06 20:15:12,471 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-12-06 20:15:12,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-12-06 20:15:12,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 20:15:12,471 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-06 20:15:12,471 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-06 20:15:12,471 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-06 20:15:12,471 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-12-06 20:15:12,472 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-12-06 20:15:12,472 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-12-06 20:15:12,472 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-12-06 20:15:12,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 06.12 08:15:12 BoogieIcfgContainer [2021-12-06 20:15:12,476 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-12-06 20:15:12,477 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-06 20:15:12,477 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-06 20:15:12,477 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-06 20:15:12,477 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:15:04" (3/4) ... [2021-12-06 20:15:12,479 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-06 20:15:12,479 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-06 20:15:12,480 INFO L158 Benchmark]: Toolchain (without parser) took 8712.49ms. Allocated memory was 142.6MB in the beginning and 172.0MB in the end (delta: 29.4MB). Free memory was 119.1MB in the beginning and 131.7MB in the end (delta: -12.6MB). Peak memory consumption was 17.0MB. Max. memory is 16.1GB. [2021-12-06 20:15:12,480 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 71.3MB. Free memory is still 40.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 20:15:12,480 INFO L158 Benchmark]: CACSL2BoogieTranslator took 142.59ms. Allocated memory is still 142.6MB. Free memory was 118.8MB in the beginning and 109.6MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-06 20:15:12,480 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.89ms. Allocated memory is still 142.6MB. Free memory was 109.6MB in the beginning and 108.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 20:15:12,481 INFO L158 Benchmark]: Boogie Preprocessor took 11.80ms. Allocated memory is still 142.6MB. Free memory was 108.0MB in the beginning and 107.2MB in the end (delta: 859.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 20:15:12,481 INFO L158 Benchmark]: RCFGBuilder took 198.00ms. Allocated memory is still 142.6MB. Free memory was 107.2MB in the beginning and 98.2MB in the end (delta: 9.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-06 20:15:12,481 INFO L158 Benchmark]: BuchiAutomizer took 8332.07ms. Allocated memory was 142.6MB in the beginning and 172.0MB in the end (delta: 29.4MB). Free memory was 97.9MB in the beginning and 132.8MB in the end (delta: -34.9MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 20:15:12,481 INFO L158 Benchmark]: Witness Printer took 2.45ms. Allocated memory is still 172.0MB. Free memory was 132.8MB in the beginning and 131.7MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 20:15:12,483 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 71.3MB. Free memory is still 40.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 142.59ms. Allocated memory is still 142.6MB. Free memory was 118.8MB in the beginning and 109.6MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.89ms. Allocated memory is still 142.6MB. Free memory was 109.6MB in the beginning and 108.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 11.80ms. Allocated memory is still 142.6MB. Free memory was 108.0MB in the beginning and 107.2MB in the end (delta: 859.0kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 198.00ms. Allocated memory is still 142.6MB. Free memory was 107.2MB in the beginning and 98.2MB in the end (delta: 9.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * BuchiAutomizer took 8332.07ms. Allocated memory was 142.6MB in the beginning and 172.0MB in the end (delta: 29.4MB). Free memory was 97.9MB in the beginning and 132.8MB in the end (delta: -34.9MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 2.45ms. Allocated memory is still 172.0MB. Free memory was 132.8MB in the beginning and 131.7MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 8 terminating modules (4 trivial, 2 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 10 locations. One nondeterministic module has affine ranking function n and consists of 10 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. 4 modules have a trivial ranking function, the largest among these consists of 21 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 8.2s and 6 iterations. TraceHistogramMax:12. Analysis of lassos took 4.7s. Construction of modules took 0.3s. Büchi inclusion checks took 2.9s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 7. Automata minimization 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 151 StatesRemovedByMinimization, 6 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 274 states and ocurred in iteration 4. Nontrivial modules had stage [2, 0, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 16/46 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 471 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 442 mSDsluCounter, 384 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 223 mSDsCounter, 318 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 711 IncrementalHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 318 mSolverCounterUnsat, 161 mSDtfsCounter, 711 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT3 SILN0 SILU0 SILI1 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital17 mio100 ax100 hnf96 lsp92 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq180 hnf93 smp79 dnf100 smp100 tf110 neg96 sie109 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 15ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 10 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.7s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-12-06 20:15:12,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-12-06 20:15:12,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-06 20:15:12,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 20:15:13,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15da5ea-83c4-4838-b25d-d449a405eff9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE