./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive/Fibonacci02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive/Fibonacci02.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3 --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 675300a4b632e073b31d1e86ab5660e0c5ab887b ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:30:08,910 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:30:08,913 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:30:08,947 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:30:08,948 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:30:08,949 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:30:08,952 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:30:08,954 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:30:08,957 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:30:08,959 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:30:08,960 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:30:08,962 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:30:08,963 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:30:08,964 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:30:08,966 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:30:08,969 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:30:08,970 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:30:08,971 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:30:08,974 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:30:08,977 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:30:08,980 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:30:08,982 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:30:08,984 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:30:08,986 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:30:08,990 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:30:08,995 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:30:09,002 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:30:09,004 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:30:09,005 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:30:09,006 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:30:09,007 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:30:09,008 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:30:09,011 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:30:09,012 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:30:09,015 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:30:09,016 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:30:09,018 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:30:09,018 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:30:09,019 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:30:09,021 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:30:09,022 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:30:09,023 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-10-15 19:30:09,081 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:30:09,086 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:30:09,087 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:30:09,087 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:30:09,089 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:30:09,089 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:30:09,090 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:30:09,090 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-10-15 19:30:09,090 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-10-15 19:30:09,090 INFO L138 SettingsManager]: * Use old map elimination=false [2021-10-15 19:30:09,092 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-10-15 19:30:09,092 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-10-15 19:30:09,092 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-10-15 19:30:09,093 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:30:09,093 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:30:09,093 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-15 19:30:09,093 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:30:09,094 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:30:09,094 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:30:09,094 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-10-15 19:30:09,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-10-15 19:30:09,095 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-10-15 19:30:09,095 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:30:09,095 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:30:09,095 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-10-15 19:30:09,096 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:30:09,096 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-10-15 19:30:09,096 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:30:09,097 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:30:09,097 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:30:09,097 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:30:09,098 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:30:09,099 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-10-15 19:30:09,099 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_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 675300a4b632e073b31d1e86ab5660e0c5ab887b [2021-10-15 19:30:09,438 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:30:09,477 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:30:09,485 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:30:09,487 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:30:09,489 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:30:09,490 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/recursive/Fibonacci02.c [2021-10-15 19:30:09,562 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/data/db90efe75/5b62e1a0d07e4c0baab45168250ff3d8/FLAG5abb21653 [2021-10-15 19:30:10,106 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:30:10,106 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/sv-benchmarks/c/recursive/Fibonacci02.c [2021-10-15 19:30:10,114 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/data/db90efe75/5b62e1a0d07e4c0baab45168250ff3d8/FLAG5abb21653 [2021-10-15 19:30:10,463 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/data/db90efe75/5b62e1a0d07e4c0baab45168250ff3d8 [2021-10-15 19:30:10,469 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:30:10,475 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:30:10,479 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:30:10,480 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:30:10,485 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:30:10,486 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:30:10" (1/1) ... [2021-10-15 19:30:10,489 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e6d0fc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:30:10, skipping insertion in model container [2021-10-15 19:30:10,489 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:30:10" (1/1) ... [2021-10-15 19:30:10,501 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:30:10,527 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:30:10,717 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/sv-benchmarks/c/recursive/Fibonacci02.c[715,728] [2021-10-15 19:30:10,722 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:30:10,732 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:30:10,744 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/sv-benchmarks/c/recursive/Fibonacci02.c[715,728] [2021-10-15 19:30:10,745 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:30:10,761 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:30:10,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:30:10 WrapperNode [2021-10-15 19:30:10,762 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:30:10,763 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:30:10,763 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:30:10,764 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:30:10,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:30:10" (1/1) ... [2021-10-15 19:30:10,793 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:30:10" (1/1) ... [2021-10-15 19:30:10,820 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:30:10,821 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:30:10,821 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:30:10,821 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:30:10,834 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:30:10" (1/1) ... [2021-10-15 19:30:10,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:30:10" (1/1) ... [2021-10-15 19:30:10,838 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:30:10" (1/1) ... [2021-10-15 19:30:10,838 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:30:10" (1/1) ... [2021-10-15 19:30:10,846 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:30:10" (1/1) ... [2021-10-15 19:30:10,850 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:30:10" (1/1) ... [2021-10-15 19:30:10,859 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:30:10" (1/1) ... [2021-10-15 19:30:10,861 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:30:10,863 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:30:10,864 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:30:10,864 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:30:10,867 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:30:10" (1/1) ... [2021-10-15 19:30:10,879 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:10,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:10,920 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:10,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-10-15 19:30:10,986 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2021-10-15 19:30:10,986 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2021-10-15 19:30:10,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:30:10,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:30:10,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:30:10,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:30:11,255 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:30:11,255 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-15 19:30:11,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:30:11 BoogieIcfgContainer [2021-10-15 19:30:11,258 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:30:11,264 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-10-15 19:30:11,265 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-10-15 19:30:11,281 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-10-15 19:30:11,282 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-15 19:30:11,283 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 15.10 07:30:10" (1/3) ... [2021-10-15 19:30:11,284 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3794a1d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 15.10 07:30:11, skipping insertion in model container [2021-10-15 19:30:11,284 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-15 19:30:11,285 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:30:10" (2/3) ... [2021-10-15 19:30:11,285 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3794a1d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 15.10 07:30:11, skipping insertion in model container [2021-10-15 19:30:11,285 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-15 19:30:11,286 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:30:11" (3/3) ... [2021-10-15 19:30:11,287 INFO L389 chiAutomizerObserver]: Analyzing ICFG Fibonacci02.c [2021-10-15 19:30:11,351 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-10-15 19:30:11,351 INFO L360 BuchiCegarLoop]: Hoare is false [2021-10-15 19:30:11,351 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-10-15 19:30:11,352 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-15 19:30:11,352 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-15 19:30:11,352 INFO L364 BuchiCegarLoop]: Difference is false [2021-10-15 19:30:11,352 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-15 19:30:11,352 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-10-15 19:30:11,384 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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) [2021-10-15 19:30:11,432 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-15 19:30:11,432 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-15 19:30:11,432 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-15 19:30:11,440 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-10-15 19:30:11,441 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-15 19:30:11,441 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-10-15 19:30:11,441 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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) [2021-10-15 19:30:11,445 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-15 19:30:11,446 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-15 19:30:11,446 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-15 19:30:11,447 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-10-15 19:30:11,447 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-15 19:30:11,456 INFO L791 eck$LassoCheckResult]: Stem: 7#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(14);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 15#L-1true havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 9; 11#L29true call main_#t~ret9 := fibonacci(main_~x~0);< 5#fibonacciENTRYtrue [2021-10-15 19:30:11,457 INFO L793 eck$LassoCheckResult]: Loop: 5#fibonacciENTRYtrue ~n := #in~n; 6#L17true assume !(~n < 1); 18#L19true assume !(1 == ~n); 17#L22true call #t~ret7 := fibonacci(~n - 1);< 5#fibonacciENTRYtrue [2021-10-15 19:30:11,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:11,471 INFO L82 PathProgramCache]: Analyzing trace with hash 42781, now seen corresponding path program 1 times [2021-10-15 19:30:11,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:30:11,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947732277] [2021-10-15 19:30:11,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:11,484 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:30:11,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:30:11,593 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 19:30:11,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:30:11,638 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 19:30:11,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:11,642 INFO L82 PathProgramCache]: Analyzing trace with hash 927641, now seen corresponding path program 1 times [2021-10-15 19:30:11,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:30:11,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758321346] [2021-10-15 19:30:11,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:11,644 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:30:11,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:30:11,660 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 19:30:11,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:30:11,671 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 19:30:11,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:11,674 INFO L82 PathProgramCache]: Analyzing trace with hash 854450357, now seen corresponding path program 1 times [2021-10-15 19:30:11,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:30:11,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490420830] [2021-10-15 19:30:11,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:11,676 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:30:11,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:30:11,699 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 19:30:11,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:30:11,729 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 19:30:11,878 INFO L210 LassoAnalysis]: Preferences: [2021-10-15 19:30:11,879 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-15 19:30:11,879 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-15 19:30:11,880 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-15 19:30:11,880 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-15 19:30:11,880 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:11,880 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-15 19:30:11,881 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-15 19:30:11,881 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration1_Loop [2021-10-15 19:30:11,881 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-15 19:30:11,882 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-15 19:30:11,902 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:11,909 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:11,917 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:11,925 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:11,931 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:12,023 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-15 19:30:12,024 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-15 19:30:12,027 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:12,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:12,045 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:12,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-10-15 19:30:12,047 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-15 19:30:12,048 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-15 19:30:12,072 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-15 19:30:12,073 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-15 19:30:12,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:12,116 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:12,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:12,117 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:12,124 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-15 19:30:12,124 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-15 19:30:12,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-10-15 19:30:12,153 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-15 19:30:12,153 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret7=0} Honda state: {fibonacci_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-15 19:30:12,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:12,197 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:12,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:12,208 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:12,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-10-15 19:30:12,240 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-15 19:30:12,240 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-15 19:30:12,253 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-15 19:30:12,253 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret8=0} Honda state: {fibonacci_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-15 19:30:12,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Ended with exit code 0 [2021-10-15 19:30:12,286 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:12,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:12,288 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:12,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-10-15 19:30:12,309 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-15 19:30:12,309 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-15 19:30:12,319 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-15 19:30:12,320 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_~n=0} Honda state: {fibonacci_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-15 19:30:12,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:12,343 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:12,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:12,346 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:12,349 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-15 19:30:12,349 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-15 19:30:12,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-10-15 19:30:12,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:12,408 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:12,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:12,410 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:12,418 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-15 19:30:12,418 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-15 19:30:12,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-10-15 19:30:12,525 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-15 19:30:12,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:12,532 INFO L210 LassoAnalysis]: Preferences: [2021-10-15 19:30:12,532 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-15 19:30:12,532 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-15 19:30:12,533 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-15 19:30:12,533 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-15 19:30:12,533 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:12,533 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-15 19:30:12,533 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-15 19:30:12,533 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration1_Loop [2021-10-15 19:30:12,533 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-15 19:30:12,533 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-15 19:30:12,557 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:12,560 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:12,563 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:12,567 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:12,569 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:12,632 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-15 19:30:12,638 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-15 19:30:12,640 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:12,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:12,642 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:12,654 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-15 19:30:12,666 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-15 19:30:12,666 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-15 19:30:12,667 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-15 19:30:12,667 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-15 19:30:12,668 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-15 19:30:12,670 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-15 19:30:12,671 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-15 19:30:12,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-10-15 19:30:12,678 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-15 19:30:12,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:12,703 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:12,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:12,704 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:12,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-10-15 19:30:12,707 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-15 19:30:12,732 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-15 19:30:12,732 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-15 19:30:12,733 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-15 19:30:12,733 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-15 19:30:12,733 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-15 19:30:12,735 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-15 19:30:12,735 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-15 19:30:12,748 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-15 19:30:12,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:12,787 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:12,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:12,792 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:12,800 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-15 19:30:12,811 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-15 19:30:12,811 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-15 19:30:12,812 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-15 19:30:12,812 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-15 19:30:12,812 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-15 19:30:12,816 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-15 19:30:12,816 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-15 19:30:12,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-10-15 19:30:12,828 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-15 19:30:12,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:12,857 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:12,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:12,858 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:12,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-10-15 19:30:12,860 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-15 19:30:12,870 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-15 19:30:12,870 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-15 19:30:12,870 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-15 19:30:12,870 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-15 19:30:12,870 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-15 19:30:12,871 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-15 19:30:12,872 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-15 19:30:12,873 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-15 19:30:12,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:12,897 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:12,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:12,899 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:12,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-10-15 19:30:12,901 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-15 19:30:12,911 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-15 19:30:12,911 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-15 19:30:12,912 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-15 19:30:12,912 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-15 19:30:12,912 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-15 19:30:12,914 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-15 19:30:12,914 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-15 19:30:12,917 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-15 19:30:12,924 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-15 19:30:12,924 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-15 19:30:12,926 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:12,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:12,957 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:12,967 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-15 19:30:12,968 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-15 19:30:12,968 INFO L513 LassoAnalysis]: Proved termination. [2021-10-15 19:30:12,968 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] [2021-10-15 19:30:12,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-10-15 19:30:12,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:12,996 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-15 19:30:13,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:13,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:13,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-15 19:30:13,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:13,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:13,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:30:13,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:13,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:30:13,218 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 [2021-10-15 19:30:13,220 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-10-15 19:30:13,388 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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 47 states and 59 transitions. Complement of second has 12 states. [2021-10-15 19:30:13,389 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 [2021-10-15 19:30:13,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-10-15 19:30:13,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2021-10-15 19:30:13,404 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2021-10-15 19:30:13,406 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 19:30:13,406 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2021-10-15 19:30:13,407 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 19:30:13,407 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2021-10-15 19:30:13,408 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 19:30:13,409 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 47 states and 59 transitions. [2021-10-15 19:30:13,424 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-15 19:30:13,433 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 47 states to 25 states and 34 transitions. [2021-10-15 19:30:13,435 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2021-10-15 19:30:13,435 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2021-10-15 19:30:13,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2021-10-15 19:30:13,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-15 19:30:13,436 INFO L681 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-10-15 19:30:13,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2021-10-15 19:30:13,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2021-10-15 19:30:13,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 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) [2021-10-15 19:30:13,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2021-10-15 19:30:13,478 INFO L704 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-10-15 19:30:13,478 INFO L587 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-10-15 19:30:13,478 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-10-15 19:30:13,478 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2021-10-15 19:30:13,480 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-15 19:30:13,480 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-15 19:30:13,480 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-15 19:30:13,482 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:30:13,482 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:30:13,483 INFO L791 eck$LassoCheckResult]: Stem: 132#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(14);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 133#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 9; 122#L29 call main_#t~ret9 := fibonacci(main_~x~0);< 131#fibonacciENTRY ~n := #in~n; 128#L17 assume !(~n < 1); 129#L19 assume !(1 == ~n); 121#L22 call #t~ret7 := fibonacci(~n - 1);< 130#fibonacciENTRY ~n := #in~n; 125#L17 assume ~n < 1;#res := 0; 126#fibonacciFINAL assume true; 134#fibonacciEXIT >#29#return; 120#L22-1 [2021-10-15 19:30:13,483 INFO L793 eck$LassoCheckResult]: Loop: 120#L22-1 call #t~ret8 := fibonacci(~n - 2);< 124#fibonacciENTRY ~n := #in~n; 139#L17 assume !(~n < 1); 138#L19 assume !(1 == ~n); 123#L22 call #t~ret7 := fibonacci(~n - 1);< 124#fibonacciENTRY ~n := #in~n; 139#L17 assume ~n < 1;#res := 0; 136#fibonacciFINAL assume true; 137#fibonacciEXIT >#29#return; 120#L22-1 [2021-10-15 19:30:13,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:13,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1391758089, now seen corresponding path program 1 times [2021-10-15 19:30:13,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:30:13,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263654466] [2021-10-15 19:30:13,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:13,485 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:30:13,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:13,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-15 19:30:13,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:13,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 19:30:13,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:30:13,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263654466] [2021-10-15 19:30:13,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263654466] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:30:13,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:30:13,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 19:30:13,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564602919] [2021-10-15 19:30:13,619 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-15 19:30:13,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:13,620 INFO L82 PathProgramCache]: Analyzing trace with hash 924369961, now seen corresponding path program 1 times [2021-10-15 19:30:13,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:30:13,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028982115] [2021-10-15 19:30:13,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:13,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:30:13,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:13,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-10-15 19:30:13,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:13,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 19:30:13,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:30:13,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028982115] [2021-10-15 19:30:13,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028982115] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:30:13,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:30:13,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 19:30:13,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307010087] [2021-10-15 19:30:13,678 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-15 19:30:13,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:30:13,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:30:13,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:30:13,684 INFO L87 Difference]: Start difference. First operand 20 states and 26 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) [2021-10-15 19:30:13,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:30:13,793 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-10-15 19:30:13,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:30:13,795 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2021-10-15 19:30:13,800 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-15 19:30:13,804 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2021-10-15 19:30:13,804 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2021-10-15 19:30:13,806 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2021-10-15 19:30:13,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2021-10-15 19:30:13,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-15 19:30:13,807 INFO L681 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-10-15 19:30:13,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2021-10-15 19:30:13,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-15 19:30:13,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 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) [2021-10-15 19:30:13,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-10-15 19:30:13,824 INFO L704 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-10-15 19:30:13,825 INFO L587 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-10-15 19:30:13,825 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-10-15 19:30:13,825 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2021-10-15 19:30:13,829 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-15 19:30:13,830 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-15 19:30:13,830 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-15 19:30:13,831 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:30:13,832 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-10-15 19:30:13,832 INFO L791 eck$LassoCheckResult]: Stem: 204#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(14);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 205#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 9; 194#L29 call main_#t~ret9 := fibonacci(main_~x~0);< 208#fibonacciENTRY ~n := #in~n; 200#L17 assume !(~n < 1); 203#L19 assume !(1 == ~n); 195#L22 call #t~ret7 := fibonacci(~n - 1);< 199#fibonacciENTRY ~n := #in~n; 201#L17 assume !(~n < 1); 202#L19 assume 1 == ~n;#res := 1; 216#fibonacciFINAL assume true; 215#fibonacciEXIT >#29#return; 193#L22-1 [2021-10-15 19:30:13,832 INFO L793 eck$LassoCheckResult]: Loop: 193#L22-1 call #t~ret8 := fibonacci(~n - 2);< 197#fibonacciENTRY ~n := #in~n; 198#L17 assume !(~n < 1); 210#L19 assume !(1 == ~n); 196#L22 call #t~ret7 := fibonacci(~n - 1);< 197#fibonacciENTRY ~n := #in~n; 198#L17 assume !(~n < 1); 210#L19 assume 1 == ~n;#res := 1; 211#fibonacciFINAL assume true; 213#fibonacciEXIT >#29#return; 193#L22-1 [2021-10-15 19:30:13,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:13,833 INFO L82 PathProgramCache]: Analyzing trace with hash 194852287, now seen corresponding path program 1 times [2021-10-15 19:30:13,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:30:13,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305831668] [2021-10-15 19:30:13,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:13,836 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:30:13,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:13,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-15 19:30:13,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:13,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:30:13,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:30:13,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305831668] [2021-10-15 19:30:13,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305831668] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:30:13,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088615817] [2021-10-15 19:30:13,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:13,983 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:30:13,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:13,984 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:30:14,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-15 19:30:14,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:14,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-15 19:30:14,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:14,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:30:14,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088615817] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:30:14,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:30:14,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-15 19:30:14,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707442439] [2021-10-15 19:30:14,130 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-15 19:30:14,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:14,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1409277793, now seen corresponding path program 1 times [2021-10-15 19:30:14,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:30:14,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589320055] [2021-10-15 19:30:14,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:14,131 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:30:14,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:30:14,144 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 19:30:14,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:30:14,154 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 19:30:14,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:14,441 INFO L210 LassoAnalysis]: Preferences: [2021-10-15 19:30:14,441 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-15 19:30:14,441 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-15 19:30:14,441 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-15 19:30:14,442 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-15 19:30:14,442 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:14,442 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-15 19:30:14,442 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-15 19:30:14,442 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration3_Loop [2021-10-15 19:30:14,442 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-15 19:30:14,443 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-15 19:30:14,444 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:14,453 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:14,457 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:14,460 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:14,516 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-15 19:30:14,516 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-15 19:30:14,516 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:14,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:14,521 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:14,526 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-15 19:30:14,526 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-15 19:30:14,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-10-15 19:30:14,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:14,593 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:14,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:14,594 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:14,600 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-15 19:30:14,601 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-15 19:30:14,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-10-15 19:30:15,198 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-15 19:30:15,201 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Ended with exit code 0 [2021-10-15 19:30:15,202 INFO L210 LassoAnalysis]: Preferences: [2021-10-15 19:30:15,202 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-15 19:30:15,202 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-15 19:30:15,202 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-15 19:30:15,202 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-15 19:30:15,202 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:15,202 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-15 19:30:15,202 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-15 19:30:15,203 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration3_Loop [2021-10-15 19:30:15,203 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-15 19:30:15,203 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-15 19:30:15,203 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:15,214 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:15,221 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:15,224 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:15,270 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-15 19:30:15,270 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-15 19:30:15,270 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:15,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:15,272 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:15,289 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-15 19:30:15,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-10-15 19:30:15,299 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-15 19:30:15,299 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-15 19:30:15,300 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-15 19:30:15,300 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-15 19:30:15,300 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-15 19:30:15,302 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-15 19:30:15,302 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-15 19:30:15,313 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-15 19:30:15,339 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-15 19:30:15,339 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-15 19:30:15,339 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:15,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:15,342 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:15,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-10-15 19:30:15,353 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-15 19:30:15,353 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-15 19:30:15,353 INFO L513 LassoAnalysis]: Proved termination. [2021-10-15 19:30:15,353 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2021-10-15 19:30:15,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:15,377 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-15 19:30:15,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:15,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:15,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-15 19:30:15,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:15,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:15,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-15 19:30:15,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:15,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:30:15,813 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2021-10-15 19:30:15,813 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8 Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 19:30:16,116 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Result 135 states and 183 transitions. Complement of second has 36 states. [2021-10-15 19:30:16,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2021-10-15 19:30:16,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 19:30:16,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2021-10-15 19:30:16,120 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 10 letters. [2021-10-15 19:30:16,121 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 19:30:16,121 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 22 letters. Loop has 10 letters. [2021-10-15 19:30:16,122 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 19:30:16,122 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 20 letters. [2021-10-15 19:30:16,126 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 19:30:16,127 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 183 transitions. [2021-10-15 19:30:16,138 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-10-15 19:30:16,144 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 108 states and 152 transitions. [2021-10-15 19:30:16,144 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 64 [2021-10-15 19:30:16,145 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2021-10-15 19:30:16,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 152 transitions. [2021-10-15 19:30:16,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-15 19:30:16,146 INFO L681 BuchiCegarLoop]: Abstraction has 108 states and 152 transitions. [2021-10-15 19:30:16,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states and 152 transitions. [2021-10-15 19:30:16,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2021-10-15 19:30:16,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 64 states have internal predecessors, (71), 21 states have call successors, (22), 11 states have call predecessors, (22), 15 states have return successors, (33), 18 states have call predecessors, (33), 19 states have call successors, (33) [2021-10-15 19:30:16,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2021-10-15 19:30:16,167 INFO L704 BuchiCegarLoop]: Abstraction has 94 states and 126 transitions. [2021-10-15 19:30:16,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:30:16,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:30:16,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:30:16,169 INFO L87 Difference]: Start difference. First operand 94 states and 126 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:30:16,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:30:16,267 INFO L93 Difference]: Finished difference Result 109 states and 147 transitions. [2021-10-15 19:30:16,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:30:16,268 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 109 states and 147 transitions. [2021-10-15 19:30:16,273 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-10-15 19:30:16,278 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 109 states to 106 states and 144 transitions. [2021-10-15 19:30:16,278 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 69 [2021-10-15 19:30:16,279 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2021-10-15 19:30:16,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 144 transitions. [2021-10-15 19:30:16,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-15 19:30:16,280 INFO L681 BuchiCegarLoop]: Abstraction has 106 states and 144 transitions. [2021-10-15 19:30:16,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states and 144 transitions. [2021-10-15 19:30:16,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2021-10-15 19:30:16,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 64 states have internal predecessors, (71), 21 states have call successors, (22), 11 states have call predecessors, (22), 15 states have return successors, (32), 18 states have call predecessors, (32), 19 states have call successors, (32) [2021-10-15 19:30:16,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 125 transitions. [2021-10-15 19:30:16,303 INFO L704 BuchiCegarLoop]: Abstraction has 94 states and 125 transitions. [2021-10-15 19:30:16,303 INFO L587 BuchiCegarLoop]: Abstraction has 94 states and 125 transitions. [2021-10-15 19:30:16,303 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-10-15 19:30:16,304 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 94 states and 125 transitions. [2021-10-15 19:30:16,306 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-10-15 19:30:16,308 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-15 19:30:16,309 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-15 19:30:16,314 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:30:16,315 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2021-10-15 19:30:16,315 INFO L791 eck$LassoCheckResult]: Stem: 754#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(14);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 755#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 9; 735#L29 call main_#t~ret9 := fibonacci(main_~x~0);< 761#fibonacciENTRY ~n := #in~n; 752#L17 assume !(~n < 1); 753#L19 assume !(1 == ~n); 744#L22 call #t~ret7 := fibonacci(~n - 1);< 743#fibonacciENTRY ~n := #in~n; 746#L17 assume !(~n < 1); 796#L19 assume !(1 == ~n); 745#L22 call #t~ret7 := fibonacci(~n - 1);< 743#fibonacciENTRY ~n := #in~n; 746#L17 assume !(~n < 1); 796#L19 assume !(1 == ~n); 745#L22 call #t~ret7 := fibonacci(~n - 1);< 743#fibonacciENTRY ~n := #in~n; 747#L17 assume !(~n < 1); 797#L19 assume 1 == ~n;#res := 1; 795#fibonacciFINAL assume true; 794#fibonacciEXIT >#29#return; 738#L22-1 call #t~ret8 := fibonacci(~n - 2);< 793#fibonacciENTRY ~n := #in~n; 824#L17 assume ~n < 1;#res := 0; 823#fibonacciFINAL assume true; 820#fibonacciEXIT >#31#return; 819#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 817#fibonacciFINAL assume true; 815#fibonacciEXIT >#29#return; 741#L22-1 [2021-10-15 19:30:16,316 INFO L793 eck$LassoCheckResult]: Loop: 741#L22-1 call #t~ret8 := fibonacci(~n - 2);< 736#fibonacciENTRY ~n := #in~n; 742#L17 assume !(~n < 1); 770#L19 assume !(1 == ~n); 740#L22 call #t~ret7 := fibonacci(~n - 1);< 736#fibonacciENTRY ~n := #in~n; 742#L17 assume !(~n < 1); 770#L19 assume !(1 == ~n); 740#L22 call #t~ret7 := fibonacci(~n - 1);< 736#fibonacciENTRY ~n := #in~n; 742#L17 assume !(~n < 1); 770#L19 assume 1 == ~n;#res := 1; 771#fibonacciFINAL assume true; 813#fibonacciEXIT >#29#return; 741#L22-1 call #t~ret8 := fibonacci(~n - 2);< 736#fibonacciENTRY ~n := #in~n; 742#L17 assume !(~n < 1); 770#L19 assume !(1 == ~n); 740#L22 call #t~ret7 := fibonacci(~n - 1);< 736#fibonacciENTRY ~n := #in~n; 742#L17 assume !(~n < 1); 770#L19 assume 1 == ~n;#res := 1; 771#fibonacciFINAL assume true; 813#fibonacciEXIT >#29#return; 741#L22-1 call #t~ret8 := fibonacci(~n - 2);< 736#fibonacciENTRY ~n := #in~n; 742#L17 assume ~n < 1;#res := 0; 798#fibonacciFINAL assume true; 822#fibonacciEXIT >#31#return; 814#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 818#fibonacciFINAL assume true; 816#fibonacciEXIT >#31#return; 814#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 818#fibonacciFINAL assume true; 816#fibonacciEXIT >#29#return; 741#L22-1 [2021-10-15 19:30:16,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:16,317 INFO L82 PathProgramCache]: Analyzing trace with hash 716279287, now seen corresponding path program 1 times [2021-10-15 19:30:16,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:30:16,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084122997] [2021-10-15 19:30:16,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:16,318 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:30:16,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:16,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-15 19:30:16,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:16,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-15 19:30:16,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:16,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-15 19:30:16,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:16,561 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-15 19:30:16,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:30:16,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084122997] [2021-10-15 19:30:16,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084122997] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:30:16,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741508035] [2021-10-15 19:30:16,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:16,563 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:30:16,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:16,569 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:30:16,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-15 19:30:16,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:16,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-15 19:30:16,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:16,823 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-15 19:30:16,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741508035] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:30:16,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:30:16,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-10-15 19:30:16,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314988321] [2021-10-15 19:30:16,830 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-15 19:30:16,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:16,830 INFO L82 PathProgramCache]: Analyzing trace with hash -202791443, now seen corresponding path program 1 times [2021-10-15 19:30:16,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:30:16,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838238728] [2021-10-15 19:30:16,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:16,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:30:16,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:16,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:16,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-10-15 19:30:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:16,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-15 19:30:16,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:16,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-15 19:30:16,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:16,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-15 19:30:16,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:17,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-15 19:30:17,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:17,011 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 26 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-15 19:30:17,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:30:17,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838238728] [2021-10-15 19:30:17,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838238728] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:30:17,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286974646] [2021-10-15 19:30:17,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:17,012 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:30:17,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:17,017 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:30:17,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-15 19:30:17,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:17,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-15 19:30:17,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:17,229 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-15 19:30:17,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286974646] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:30:17,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:30:17,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-10-15 19:30:17,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873274253] [2021-10-15 19:30:17,231 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-15 19:30:17,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:30:17,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-15 19:30:17,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-15 19:30:17,232 INFO L87 Difference]: Start difference. First operand 94 states and 125 transitions. cyclomatic complexity: 36 Second operand has 12 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-15 19:30:17,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:30:17,449 INFO L93 Difference]: Finished difference Result 116 states and 158 transitions. [2021-10-15 19:30:17,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 19:30:17,450 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 116 states and 158 transitions. [2021-10-15 19:30:17,458 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2021-10-15 19:30:17,468 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 116 states to 114 states and 156 transitions. [2021-10-15 19:30:17,468 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2021-10-15 19:30:17,470 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2021-10-15 19:30:17,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 114 states and 156 transitions. [2021-10-15 19:30:17,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-15 19:30:17,471 INFO L681 BuchiCegarLoop]: Abstraction has 114 states and 156 transitions. [2021-10-15 19:30:17,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states and 156 transitions. [2021-10-15 19:30:17,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-10-15 19:30:17,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 76 states have internal predecessors, (85), 26 states have call successors, (27), 13 states have call predecessors, (27), 18 states have return successors, (44), 24 states have call predecessors, (44), 24 states have call successors, (44) [2021-10-15 19:30:17,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 156 transitions. [2021-10-15 19:30:17,494 INFO L704 BuchiCegarLoop]: Abstraction has 114 states and 156 transitions. [2021-10-15 19:30:17,494 INFO L587 BuchiCegarLoop]: Abstraction has 114 states and 156 transitions. [2021-10-15 19:30:17,494 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-10-15 19:30:17,495 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 114 states and 156 transitions. [2021-10-15 19:30:17,497 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2021-10-15 19:30:17,497 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-15 19:30:17,497 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-15 19:30:17,499 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:30:17,500 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-10-15 19:30:17,500 INFO L791 eck$LassoCheckResult]: Stem: 1262#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(14);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 1263#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 9; 1246#L29 call main_#t~ret9 := fibonacci(main_~x~0);< 1268#fibonacciENTRY ~n := #in~n; 1306#L17 assume !(~n < 1); 1276#L19 assume !(1 == ~n); 1257#L22 call #t~ret7 := fibonacci(~n - 1);< 1256#fibonacciENTRY ~n := #in~n; 1258#L17 assume !(~n < 1); 1261#L19 assume !(1 == ~n); 1270#L22 call #t~ret7 := fibonacci(~n - 1);< 1300#fibonacciENTRY ~n := #in~n; 1304#L17 assume !(~n < 1); 1302#L19 assume !(1 == ~n); 1269#L22 call #t~ret7 := fibonacci(~n - 1);< 1300#fibonacciENTRY ~n := #in~n; 1304#L17 assume !(~n < 1); 1302#L19 assume !(1 == ~n); 1269#L22 call #t~ret7 := fibonacci(~n - 1);< 1300#fibonacciENTRY ~n := #in~n; 1305#L17 assume !(~n < 1); 1303#L19 assume 1 == ~n;#res := 1; 1301#fibonacciFINAL assume true; 1299#fibonacciEXIT >#29#return; 1249#L22-1 call #t~ret8 := fibonacci(~n - 2);< 1297#fibonacciENTRY ~n := #in~n; 1259#L17 assume ~n < 1;#res := 0; 1260#fibonacciFINAL assume true; 1264#fibonacciEXIT >#31#return; 1265#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1271#fibonacciFINAL assume true; 1277#fibonacciEXIT >#29#return; 1309#L22-1 [2021-10-15 19:30:17,500 INFO L793 eck$LassoCheckResult]: Loop: 1309#L22-1 call #t~ret8 := fibonacci(~n - 2);< 1247#fibonacciENTRY ~n := #in~n; 1307#L17 assume !(~n < 1); 1312#L19 assume !(1 == ~n); 1310#L22 call #t~ret7 := fibonacci(~n - 1);< 1247#fibonacciENTRY ~n := #in~n; 1307#L17 assume !(~n < 1); 1312#L19 assume !(1 == ~n); 1310#L22 call #t~ret7 := fibonacci(~n - 1);< 1247#fibonacciENTRY ~n := #in~n; 1307#L17 assume !(~n < 1); 1312#L19 assume 1 == ~n;#res := 1; 1275#fibonacciFINAL assume true; 1347#fibonacciEXIT >#29#return; 1254#L22-1 call #t~ret8 := fibonacci(~n - 2);< 1251#fibonacciENTRY ~n := #in~n; 1255#L17 assume ~n < 1;#res := 0; 1311#fibonacciFINAL assume true; 1346#fibonacciEXIT >#31#return; 1337#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1344#fibonacciFINAL assume true; 1339#fibonacciEXIT >#29#return; 1309#L22-1 [2021-10-15 19:30:17,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:17,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1460678817, now seen corresponding path program 2 times [2021-10-15 19:30:17,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:30:17,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833984414] [2021-10-15 19:30:17,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:17,502 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:30:17,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:17,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-15 19:30:17,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:17,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-15 19:30:17,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:17,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-15 19:30:17,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:17,688 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-15 19:30:17,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:30:17,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833984414] [2021-10-15 19:30:17,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833984414] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:30:17,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849404093] [2021-10-15 19:30:17,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:30:17,689 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:30:17,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:17,694 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:30:17,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-15 19:30:17,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:30:17,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:30:17,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-15 19:30:17,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:17,948 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-15 19:30:17,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849404093] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:30:17,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:30:17,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-10-15 19:30:17,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698347962] [2021-10-15 19:30:17,949 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-15 19:30:17,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:17,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1166275439, now seen corresponding path program 2 times [2021-10-15 19:30:17,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:30:17,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382056567] [2021-10-15 19:30:17,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:17,951 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:30:17,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:30:17,959 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 19:30:17,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:30:17,973 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 19:30:18,318 INFO L210 LassoAnalysis]: Preferences: [2021-10-15 19:30:18,318 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-15 19:30:18,319 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-15 19:30:18,319 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-15 19:30:18,319 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-15 19:30:18,319 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:18,319 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-15 19:30:18,319 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-15 19:30:18,319 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration5_Loop [2021-10-15 19:30:18,319 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-15 19:30:18,319 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-15 19:30:18,320 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:18,324 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:18,330 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:18,363 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:18,428 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-15 19:30:18,428 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-15 19:30:18,428 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:18,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:18,434 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:18,445 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-15 19:30:18,445 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-15 19:30:18,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2021-10-15 19:30:18,471 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-15 19:30:18,472 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-15 19:30:18,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:18,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:18,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:18,505 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:18,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2021-10-15 19:30:18,508 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-15 19:30:18,508 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-15 19:30:18,517 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-15 19:30:18,518 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret8=0} Honda state: {fibonacci_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-15 19:30:18,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:18,556 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:18,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:18,557 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:18,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2021-10-15 19:30:18,560 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-15 19:30:18,560 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-15 19:30:18,569 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-15 19:30:18,569 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret7=1} Honda state: {fibonacci_#t~ret7=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-15 19:30:18,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:18,598 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:18,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:18,599 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:18,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2021-10-15 19:30:18,600 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-15 19:30:18,600 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-15 19:30:18,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:18,679 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:18,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:18,681 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:18,690 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-15 19:30:18,690 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-15 19:30:18,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2021-10-15 19:30:19,644 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-15 19:30:19,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:19,648 INFO L210 LassoAnalysis]: Preferences: [2021-10-15 19:30:19,648 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-15 19:30:19,648 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-15 19:30:19,648 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-15 19:30:19,648 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-15 19:30:19,648 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:19,648 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-15 19:30:19,648 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-15 19:30:19,648 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration5_Loop [2021-10-15 19:30:19,648 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-15 19:30:19,648 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-15 19:30:19,649 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:19,683 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:19,685 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:19,688 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:19,757 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-15 19:30:19,757 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-15 19:30:19,757 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:19,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:19,758 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:19,770 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-15 19:30:19,781 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-15 19:30:19,782 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-15 19:30:19,782 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-15 19:30:19,782 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-15 19:30:19,782 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-15 19:30:19,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-10-15 19:30:19,786 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-15 19:30:19,786 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-15 19:30:19,790 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-15 19:30:19,800 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-15 19:30:19,800 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-15 19:30:19,800 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:19,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:19,802 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:19,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-10-15 19:30:19,803 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-15 19:30:19,803 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-15 19:30:19,803 INFO L513 LassoAnalysis]: Proved termination. [2021-10-15 19:30:19,803 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2021-10-15 19:30:19,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:19,827 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-15 19:30:19,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:19,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:19,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-15 19:30:19,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:20,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:20,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-15 19:30:20,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:20,617 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-15 19:30:20,618 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 [2021-10-15 19:30:20,618 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 114 states and 156 transitions. cyclomatic complexity: 48 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-15 19:30:20,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:20,982 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 114 states and 156 transitions. cyclomatic complexity: 48. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 247 states and 344 transitions. Complement of second has 45 states. [2021-10-15 19:30:20,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2021-10-15 19:30:20,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-15 19:30:20,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 41 transitions. [2021-10-15 19:30:20,987 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 32 letters. Loop has 22 letters. [2021-10-15 19:30:20,988 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 19:30:20,988 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-15 19:30:21,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:21,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:21,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-15 19:30:21,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:21,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:21,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-15 19:30:21,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:21,759 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-15 19:30:21,761 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 [2021-10-15 19:30:21,762 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 114 states and 156 transitions. cyclomatic complexity: 48 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-15 19:30:21,963 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 114 states and 156 transitions. cyclomatic complexity: 48. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 308 states and 417 transitions. Complement of second has 25 states. [2021-10-15 19:30:21,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2021-10-15 19:30:21,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-15 19:30:21,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 24 transitions. [2021-10-15 19:30:21,964 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 32 letters. Loop has 22 letters. [2021-10-15 19:30:21,965 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 19:30:21,965 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-15 19:30:21,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:22,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-15 19:30:22,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:22,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:22,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-15 19:30:22,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:22,698 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-15 19:30:22,699 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 [2021-10-15 19:30:22,699 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 114 states and 156 transitions. cyclomatic complexity: 48 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-15 19:30:23,028 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 114 states and 156 transitions. cyclomatic complexity: 48. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 1129 states and 1571 transitions. Complement of second has 138 states. [2021-10-15 19:30:23,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2021-10-15 19:30:23,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-15 19:30:23,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 46 transitions. [2021-10-15 19:30:23,031 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 32 letters. Loop has 22 letters. [2021-10-15 19:30:23,033 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 19:30:23,033 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 54 letters. Loop has 22 letters. [2021-10-15 19:30:23,035 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 19:30:23,035 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 32 letters. Loop has 44 letters. [2021-10-15 19:30:23,038 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 19:30:23,038 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1129 states and 1571 transitions. [2021-10-15 19:30:23,065 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 58 [2021-10-15 19:30:23,086 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1129 states to 638 states and 970 transitions. [2021-10-15 19:30:23,086 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 258 [2021-10-15 19:30:23,088 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 287 [2021-10-15 19:30:23,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 638 states and 970 transitions. [2021-10-15 19:30:23,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-15 19:30:23,089 INFO L681 BuchiCegarLoop]: Abstraction has 638 states and 970 transitions. [2021-10-15 19:30:23,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states and 970 transitions. [2021-10-15 19:30:23,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 469. [2021-10-15 19:30:23,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 286 states have (on average 1.2027972027972027) internal successors, (344), 306 states have internal predecessors, (344), 107 states have call successors, (121), 56 states have call predecessors, (121), 76 states have return successors, (212), 106 states have call predecessors, (212), 105 states have call successors, (212) [2021-10-15 19:30:23,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 677 transitions. [2021-10-15 19:30:23,154 INFO L704 BuchiCegarLoop]: Abstraction has 469 states and 677 transitions. [2021-10-15 19:30:23,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:30:23,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-15 19:30:23,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-10-15 19:30:23,156 INFO L87 Difference]: Start difference. First operand 469 states and 677 transitions. Second operand has 14 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-15 19:30:23,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:30:23,441 INFO L93 Difference]: Finished difference Result 529 states and 758 transitions. [2021-10-15 19:30:23,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-15 19:30:23,441 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 529 states and 758 transitions. [2021-10-15 19:30:23,455 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-10-15 19:30:23,469 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 529 states to 526 states and 751 transitions. [2021-10-15 19:30:23,470 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 233 [2021-10-15 19:30:23,471 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 233 [2021-10-15 19:30:23,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 526 states and 751 transitions. [2021-10-15 19:30:23,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-15 19:30:23,472 INFO L681 BuchiCegarLoop]: Abstraction has 526 states and 751 transitions. [2021-10-15 19:30:23,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states and 751 transitions. [2021-10-15 19:30:23,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 486. [2021-10-15 19:30:23,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 296 states have (on average 1.1993243243243243) internal successors, (355), 317 states have internal predecessors, (355), 112 states have call successors, (126), 58 states have call predecessors, (126), 78 states have return successors, (217), 110 states have call predecessors, (217), 108 states have call successors, (217) [2021-10-15 19:30:23,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 698 transitions. [2021-10-15 19:30:23,515 INFO L704 BuchiCegarLoop]: Abstraction has 486 states and 698 transitions. [2021-10-15 19:30:23,516 INFO L587 BuchiCegarLoop]: Abstraction has 486 states and 698 transitions. [2021-10-15 19:30:23,516 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-10-15 19:30:23,516 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 486 states and 698 transitions. [2021-10-15 19:30:23,522 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-10-15 19:30:23,522 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-15 19:30:23,522 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-15 19:30:23,524 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:30:23,525 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-15 19:30:23,525 INFO L791 eck$LassoCheckResult]: Stem: 4975#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(14);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 4976#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 9; 4945#L29 call main_#t~ret9 := fibonacci(main_~x~0);< 4981#fibonacciENTRY ~n := #in~n; 5014#L17 assume !(~n < 1); 5013#L19 assume !(1 == ~n); 5009#L22 call #t~ret7 := fibonacci(~n - 1);< 5012#fibonacciENTRY ~n := #in~n; 5011#L17 assume !(~n < 1); 5010#L19 assume !(1 == ~n); 5006#L22 call #t~ret7 := fibonacci(~n - 1);< 5008#fibonacciENTRY ~n := #in~n; 5007#L17 assume !(~n < 1); 5005#L19 assume !(1 == ~n); 4989#L22 call #t~ret7 := fibonacci(~n - 1);< 5002#fibonacciENTRY ~n := #in~n; 5003#L17 assume !(~n < 1); 5029#L19 assume !(1 == ~n); 4990#L22 call #t~ret7 := fibonacci(~n - 1);< 5002#fibonacciENTRY ~n := #in~n; 5004#L17 assume !(~n < 1); 4988#L19 assume 1 == ~n;#res := 1; 4991#fibonacciFINAL assume true; 5096#fibonacciEXIT >#29#return; 5085#L22-1 call #t~ret8 := fibonacci(~n - 2);< 5090#fibonacciENTRY ~n := #in~n; 5173#L17 assume !(~n < 1); 5098#L19 assume !(1 == ~n); 5099#L22 call #t~ret7 := fibonacci(~n - 1);< 5181#fibonacciENTRY ~n := #in~n; 5208#L17 assume !(~n < 1); 5185#L19 assume !(1 == ~n); 5186#L22 call #t~ret7 := fibonacci(~n - 1);< 5199#fibonacciENTRY [2021-10-15 19:30:23,525 INFO L793 eck$LassoCheckResult]: Loop: 5199#fibonacciENTRY ~n := #in~n; 5204#L17 assume !(~n < 1); 5203#L19 assume !(1 == ~n); 5198#L22 call #t~ret7 := fibonacci(~n - 1);< 5199#fibonacciENTRY [2021-10-15 19:30:23,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:23,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1561489865, now seen corresponding path program 1 times [2021-10-15 19:30:23,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:30:23,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198706144] [2021-10-15 19:30:23,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:23,527 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:30:23,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:23,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-15 19:30:23,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:23,681 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 38 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-15 19:30:23,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:30:23,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198706144] [2021-10-15 19:30:23,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198706144] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:30:23,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526946594] [2021-10-15 19:30:23,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:23,682 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:30:23,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:23,685 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:30:23,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-15 19:30:24,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:24,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-15 19:30:24,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:24,120 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 38 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-15 19:30:24,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526946594] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:30:24,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:30:24,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-10-15 19:30:24,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86996177] [2021-10-15 19:30:24,126 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-15 19:30:24,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:24,126 INFO L82 PathProgramCache]: Analyzing trace with hash 927641, now seen corresponding path program 2 times [2021-10-15 19:30:24,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:30:24,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532683171] [2021-10-15 19:30:24,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:24,127 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:30:24,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:30:24,135 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 19:30:24,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:30:24,138 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 19:30:24,187 INFO L210 LassoAnalysis]: Preferences: [2021-10-15 19:30:24,187 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-15 19:30:24,187 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-15 19:30:24,187 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-15 19:30:24,188 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-15 19:30:24,188 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:24,188 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-15 19:30:24,188 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-15 19:30:24,188 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration6_Loop [2021-10-15 19:30:24,188 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-15 19:30:24,189 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-15 19:30:24,190 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:24,192 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:24,195 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:24,197 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:24,204 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:24,247 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-15 19:30:24,247 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-15 19:30:24,247 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:24,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:24,248 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:24,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2021-10-15 19:30:24,250 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-15 19:30:24,251 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-15 19:30:24,261 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-15 19:30:24,261 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-15 19:30:24,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:24,289 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:24,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:24,290 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:24,292 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-15 19:30:24,292 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-15 19:30:24,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2021-10-15 19:30:24,303 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-15 19:30:24,303 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret8=0} Honda state: {fibonacci_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-15 19:30:24,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Ended with exit code 0 [2021-10-15 19:30:24,327 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:24,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:24,328 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:24,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2021-10-15 19:30:24,330 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-15 19:30:24,330 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-15 19:30:24,340 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-15 19:30:24,340 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_~n=0} Honda state: {fibonacci_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-15 19:30:24,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:24,366 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:24,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:24,366 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:24,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2021-10-15 19:30:24,368 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-15 19:30:24,368 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-15 19:30:24,415 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Ended with exit code 0 [2021-10-15 19:30:24,415 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:24,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:24,416 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:24,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2021-10-15 19:30:24,418 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-15 19:30:24,418 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-15 19:30:24,459 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-15 19:30:24,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:24,462 INFO L210 LassoAnalysis]: Preferences: [2021-10-15 19:30:24,462 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-15 19:30:24,462 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-15 19:30:24,462 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-15 19:30:24,462 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-15 19:30:24,462 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:24,462 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-15 19:30:24,462 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-15 19:30:24,462 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration6_Loop [2021-10-15 19:30:24,463 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-15 19:30:24,463 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-15 19:30:24,464 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:24,471 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:24,473 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:24,479 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:24,481 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:24,517 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-15 19:30:24,517 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-15 19:30:24,517 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:24,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:24,522 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:24,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2021-10-15 19:30:24,524 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-15 19:30:24,533 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-15 19:30:24,533 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-15 19:30:24,533 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-15 19:30:24,533 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-15 19:30:24,533 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-15 19:30:24,534 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-15 19:30:24,534 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-15 19:30:24,536 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-15 19:30:24,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:24,564 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:24,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:24,565 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:24,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2021-10-15 19:30:24,567 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-15 19:30:24,576 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-15 19:30:24,576 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-15 19:30:24,576 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-15 19:30:24,576 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-15 19:30:24,576 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-15 19:30:24,577 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-15 19:30:24,577 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-15 19:30:24,586 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-15 19:30:24,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:24,610 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:24,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:24,612 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:24,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Waiting until timeout for monitored process [2021-10-15 19:30:24,614 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-15 19:30:24,622 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-15 19:30:24,622 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-15 19:30:24,623 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-15 19:30:24,623 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-15 19:30:24,623 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-15 19:30:24,624 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-15 19:30:24,624 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-15 19:30:24,628 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-15 19:30:24,631 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-15 19:30:24,632 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-15 19:30:24,632 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:24,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:24,633 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:24,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Waiting until timeout for monitored process [2021-10-15 19:30:24,634 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-15 19:30:24,634 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-15 19:30:24,635 INFO L513 LassoAnalysis]: Proved termination. [2021-10-15 19:30:24,635 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] [2021-10-15 19:30:24,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:24,669 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-15 19:30:24,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:24,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:24,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-15 19:30:24,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:24,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:24,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:30:24,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:25,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:30:25,003 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 [2021-10-15 19:30:25,003 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 486 states and 698 transitions. cyclomatic complexity: 222 Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:30:25,078 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 486 states and 698 transitions. cyclomatic complexity: 222. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 499 states and 711 transitions. Complement of second has 13 states. [2021-10-15 19:30:25,078 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 [2021-10-15 19:30:25,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:30:25,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2021-10-15 19:30:25,079 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 33 letters. Loop has 4 letters. [2021-10-15 19:30:25,080 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 19:30:25,080 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-15 19:30:25,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:25,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:25,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-15 19:30:25,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:25,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Ended with exit code 0 [2021-10-15 19:30:25,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:25,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:30:25,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:25,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:30:25,475 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 [2021-10-15 19:30:25,475 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 486 states and 698 transitions. cyclomatic complexity: 222 Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:30:25,545 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 486 states and 698 transitions. cyclomatic complexity: 222. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 499 states and 711 transitions. Complement of second has 13 states. [2021-10-15 19:30:25,546 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 [2021-10-15 19:30:25,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:30:25,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2021-10-15 19:30:25,547 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 33 letters. Loop has 4 letters. [2021-10-15 19:30:25,547 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 19:30:25,548 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-15 19:30:25,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:25,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:25,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-15 19:30:25,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:25,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:25,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:30:25,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:25,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:30:25,898 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 [2021-10-15 19:30:25,898 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 486 states and 698 transitions. cyclomatic complexity: 222 Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:30:25,999 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 486 states and 698 transitions. cyclomatic complexity: 222. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 640 states and 870 transitions. Complement of second has 14 states. [2021-10-15 19:30:26,000 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 [2021-10-15 19:30:26,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:30:26,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2021-10-15 19:30:26,001 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 33 letters. Loop has 4 letters. [2021-10-15 19:30:26,004 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 19:30:26,004 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 37 letters. Loop has 4 letters. [2021-10-15 19:30:26,005 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 19:30:26,005 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 33 letters. Loop has 8 letters. [2021-10-15 19:30:26,005 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 19:30:26,005 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 640 states and 870 transitions. [2021-10-15 19:30:26,018 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-10-15 19:30:26,031 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 640 states to 538 states and 756 transitions. [2021-10-15 19:30:26,031 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 193 [2021-10-15 19:30:26,032 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 202 [2021-10-15 19:30:26,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 538 states and 756 transitions. [2021-10-15 19:30:26,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-15 19:30:26,033 INFO L681 BuchiCegarLoop]: Abstraction has 538 states and 756 transitions. [2021-10-15 19:30:26,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states and 756 transitions. [2021-10-15 19:30:26,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 508. [2021-10-15 19:30:26,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 318 states have (on average 1.1855345911949686) internal successors, (377), 339 states have internal predecessors, (377), 112 states have call successors, (126), 58 states have call predecessors, (126), 78 states have return successors, (217), 110 states have call predecessors, (217), 108 states have call successors, (217) [2021-10-15 19:30:26,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 720 transitions. [2021-10-15 19:30:26,064 INFO L704 BuchiCegarLoop]: Abstraction has 508 states and 720 transitions. [2021-10-15 19:30:26,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:30:26,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-15 19:30:26,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-10-15 19:30:26,067 INFO L87 Difference]: Start difference. First operand 508 states and 720 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (7), 6 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:30:26,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:30:26,316 INFO L93 Difference]: Finished difference Result 575 states and 818 transitions. [2021-10-15 19:30:26,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-15 19:30:26,317 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 575 states and 818 transitions. [2021-10-15 19:30:26,328 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-10-15 19:30:26,341 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 575 states to 565 states and 805 transitions. [2021-10-15 19:30:26,341 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 215 [2021-10-15 19:30:26,342 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 215 [2021-10-15 19:30:26,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 565 states and 805 transitions. [2021-10-15 19:30:26,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-15 19:30:26,342 INFO L681 BuchiCegarLoop]: Abstraction has 565 states and 805 transitions. [2021-10-15 19:30:26,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states and 805 transitions. [2021-10-15 19:30:26,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 531. [2021-10-15 19:30:26,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 331 states have (on average 1.1812688821752266) internal successors, (391), 354 states have internal predecessors, (391), 121 states have call successors, (135), 62 states have call predecessors, (135), 79 states have return successors, (229), 114 states have call predecessors, (229), 115 states have call successors, (229) [2021-10-15 19:30:26,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 755 transitions. [2021-10-15 19:30:26,373 INFO L704 BuchiCegarLoop]: Abstraction has 531 states and 755 transitions. [2021-10-15 19:30:26,373 INFO L587 BuchiCegarLoop]: Abstraction has 531 states and 755 transitions. [2021-10-15 19:30:26,373 INFO L425 BuchiCegarLoop]: ======== Iteration 7============ [2021-10-15 19:30:26,373 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 531 states and 755 transitions. [2021-10-15 19:30:26,379 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-10-15 19:30:26,379 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-15 19:30:26,379 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-15 19:30:26,383 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [9, 9, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:30:26,384 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-15 19:30:26,384 INFO L791 eck$LassoCheckResult]: Stem: 8705#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(14);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 8706#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 9; 8714#L29 call main_#t~ret9 := fibonacci(main_~x~0);< 8715#fibonacciENTRY ~n := #in~n; 8752#L17 assume !(~n < 1); 8750#L19 assume !(1 == ~n); 8747#L22 call #t~ret7 := fibonacci(~n - 1);< 8748#fibonacciENTRY ~n := #in~n; 8765#L17 assume !(~n < 1); 8763#L19 assume !(1 == ~n); 8759#L22 call #t~ret7 := fibonacci(~n - 1);< 8762#fibonacciENTRY ~n := #in~n; 8780#L17 assume !(~n < 1); 8779#L19 assume !(1 == ~n); 8755#L22 call #t~ret7 := fibonacci(~n - 1);< 8760#fibonacciENTRY ~n := #in~n; 8936#L17 assume !(~n < 1); 8873#L19 assume !(1 == ~n); 8776#L22 call #t~ret7 := fibonacci(~n - 1);< 8786#fibonacciENTRY ~n := #in~n; 8798#L17 assume !(~n < 1); 8795#L19 assume !(1 == ~n); 8775#L22 call #t~ret7 := fibonacci(~n - 1);< 8786#fibonacciENTRY ~n := #in~n; 8819#L17 assume !(~n < 1); 8843#L19 assume 1 == ~n;#res := 1; 8840#fibonacciFINAL assume true; 8820#fibonacciEXIT >#29#return; 8813#L22-1 call #t~ret8 := fibonacci(~n - 2);< 8818#fibonacciENTRY ~n := #in~n; 9046#L17 assume !(~n < 1); 9035#L19 assume !(1 == ~n); 8737#L22 call #t~ret7 := fibonacci(~n - 1);< 8736#fibonacciENTRY ~n := #in~n; 8740#L17 assume !(~n < 1); 9167#L19 assume !(1 == ~n); 8722#L22 call #t~ret7 := fibonacci(~n - 1);< 8733#fibonacciENTRY ~n := #in~n; 8734#L17 assume !(~n < 1); 9166#L19 assume !(1 == ~n); 8721#L22 [2021-10-15 19:30:26,385 INFO L793 eck$LassoCheckResult]: Loop: 8721#L22 call #t~ret7 := fibonacci(~n - 1);< 8733#fibonacciENTRY ~n := #in~n; 8734#L17 assume !(~n < 1); 9166#L19 assume !(1 == ~n); 8721#L22 [2021-10-15 19:30:26,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:26,385 INFO L82 PathProgramCache]: Analyzing trace with hash 382930005, now seen corresponding path program 2 times [2021-10-15 19:30:26,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:30:26,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771532694] [2021-10-15 19:30:26,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:26,386 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:30:26,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:26,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-10-15 19:30:26,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:26,594 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 64 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-15 19:30:26,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:30:26,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771532694] [2021-10-15 19:30:26,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771532694] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:30:26,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585960717] [2021-10-15 19:30:26,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:30:26,596 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:30:26,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:26,601 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:30:26,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-15 19:30:26,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:30:26,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:30:26,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-15 19:30:26,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:27,152 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 64 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-15 19:30:27,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585960717] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:30:27,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:30:27,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-10-15 19:30:27,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517242344] [2021-10-15 19:30:27,154 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-15 19:30:27,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:27,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1757801, now seen corresponding path program 3 times [2021-10-15 19:30:27,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:30:27,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938009490] [2021-10-15 19:30:27,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:27,155 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:30:27,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:30:27,163 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 19:30:27,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:30:27,166 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 19:30:27,231 INFO L210 LassoAnalysis]: Preferences: [2021-10-15 19:30:27,231 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-15 19:30:27,231 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-15 19:30:27,232 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-15 19:30:27,232 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-15 19:30:27,232 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:27,232 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-15 19:30:27,232 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-15 19:30:27,232 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration7_Loop [2021-10-15 19:30:27,232 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-15 19:30:27,233 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-15 19:30:27,233 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:27,236 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:27,238 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:27,241 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:27,303 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-15 19:30:27,303 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-15 19:30:27,304 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:27,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:27,309 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:27,316 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-15 19:30:27,317 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-15 19:30:27,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Waiting until timeout for monitored process [2021-10-15 19:30:27,341 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-15 19:30:27,341 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret7=0} Honda state: {fibonacci_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-15 19:30:27,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:27,374 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:27,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:27,375 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:27,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Waiting until timeout for monitored process [2021-10-15 19:30:27,377 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-15 19:30:27,377 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-15 19:30:27,387 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-15 19:30:27,387 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-15 19:30:27,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:27,415 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:27,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:27,415 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:27,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Waiting until timeout for monitored process [2021-10-15 19:30:27,417 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-15 19:30:27,417 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-15 19:30:27,427 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-15 19:30:27,428 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret8=0} Honda state: {fibonacci_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-15 19:30:27,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:27,451 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:27,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:27,452 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:27,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Waiting until timeout for monitored process [2021-10-15 19:30:27,454 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-15 19:30:27,455 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-15 19:30:27,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Ended with exit code 0 [2021-10-15 19:30:27,498 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:27,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:27,499 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:27,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Waiting until timeout for monitored process [2021-10-15 19:30:27,500 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-15 19:30:27,500 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-15 19:30:34,970 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-15 19:30:34,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:34,974 INFO L210 LassoAnalysis]: Preferences: [2021-10-15 19:30:34,974 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-15 19:30:34,974 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-15 19:30:34,974 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-15 19:30:34,975 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-15 19:30:34,975 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:34,975 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-15 19:30:34,975 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-15 19:30:34,975 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration7_Loop [2021-10-15 19:30:34,975 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-15 19:30:34,975 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-15 19:30:34,976 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:34,979 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:34,982 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:34,984 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:35,061 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-15 19:30:35,061 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-15 19:30:35,062 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:35,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:35,063 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:35,077 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-15 19:30:35,089 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-15 19:30:35,089 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-15 19:30:35,089 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-15 19:30:35,089 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-15 19:30:35,089 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-15 19:30:35,090 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-15 19:30:35,090 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-15 19:30:35,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Waiting until timeout for monitored process [2021-10-15 19:30:35,104 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-15 19:30:35,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:35,152 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:35,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:35,153 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:35,155 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-15 19:30:35,167 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-15 19:30:35,167 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-15 19:30:35,167 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-15 19:30:35,167 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-15 19:30:35,167 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-15 19:30:35,169 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-15 19:30:35,169 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-15 19:30:35,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Waiting until timeout for monitored process [2021-10-15 19:30:35,185 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-15 19:30:35,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:35,224 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:35,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:35,225 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:35,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Waiting until timeout for monitored process [2021-10-15 19:30:35,227 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-15 19:30:35,236 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-15 19:30:35,236 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-15 19:30:35,236 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-15 19:30:35,236 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-15 19:30:35,236 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-15 19:30:35,237 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-15 19:30:35,237 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-15 19:30:35,238 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-15 19:30:35,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:35,263 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:35,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:35,264 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:35,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Waiting until timeout for monitored process [2021-10-15 19:30:35,266 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-15 19:30:35,274 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-15 19:30:35,274 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-15 19:30:35,275 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-15 19:30:35,275 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-15 19:30:35,275 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-15 19:30:35,276 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-15 19:30:35,276 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-15 19:30:35,278 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-15 19:30:35,282 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-15 19:30:35,282 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-15 19:30:35,282 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:35,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:35,284 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:35,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Waiting until timeout for monitored process [2021-10-15 19:30:35,285 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-15 19:30:35,285 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-15 19:30:35,286 INFO L513 LassoAnalysis]: Proved termination. [2021-10-15 19:30:35,286 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2021-10-15 19:30:35,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:35,311 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-15 19:30:35,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:35,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:35,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-15 19:30:35,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:35,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:35,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:30:35,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:35,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:30:35,714 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2021-10-15 19:30:35,714 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 531 states and 755 transitions. cyclomatic complexity: 234 Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:30:35,784 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 531 states and 755 transitions. cyclomatic complexity: 234. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 546 states and 771 transitions. Complement of second has 18 states. [2021-10-15 19:30:35,785 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 [2021-10-15 19:30:35,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:30:35,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2021-10-15 19:30:35,786 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 40 letters. Loop has 4 letters. [2021-10-15 19:30:35,786 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 19:30:35,786 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-15 19:30:35,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:35,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:35,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:35,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-15 19:30:35,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:36,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:36,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:30:36,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:36,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:30:36,286 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2021-10-15 19:30:36,286 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 531 states and 755 transitions. cyclomatic complexity: 234 Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:30:36,405 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 531 states and 755 transitions. cyclomatic complexity: 234. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 776 states and 1087 transitions. Complement of second has 22 states. [2021-10-15 19:30:36,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2021-10-15 19:30:36,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:30:36,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2021-10-15 19:30:36,407 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 40 letters. Loop has 4 letters. [2021-10-15 19:30:36,408 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 19:30:36,408 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 44 letters. Loop has 4 letters. [2021-10-15 19:30:36,408 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 19:30:36,408 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 40 letters. Loop has 8 letters. [2021-10-15 19:30:36,409 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 19:30:36,409 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 776 states and 1087 transitions. [2021-10-15 19:30:36,424 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-10-15 19:30:36,440 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 776 states to 709 states and 1015 transitions. [2021-10-15 19:30:36,440 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 235 [2021-10-15 19:30:36,441 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 263 [2021-10-15 19:30:36,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 709 states and 1015 transitions. [2021-10-15 19:30:36,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-15 19:30:36,442 INFO L681 BuchiCegarLoop]: Abstraction has 709 states and 1015 transitions. [2021-10-15 19:30:36,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states and 1015 transitions. [2021-10-15 19:30:36,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 692. [2021-10-15 19:30:36,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 439 states have (on average 1.1548974943052392) internal successors, (507), 468 states have internal predecessors, (507), 154 states have call successors, (186), 89 states have call predecessors, (186), 99 states have return successors, (297), 134 states have call predecessors, (297), 148 states have call successors, (297) [2021-10-15 19:30:36,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 990 transitions. [2021-10-15 19:30:36,485 INFO L704 BuchiCegarLoop]: Abstraction has 692 states and 990 transitions. [2021-10-15 19:30:36,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:30:36,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-15 19:30:36,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-10-15 19:30:36,486 INFO L87 Difference]: Start difference. First operand 692 states and 990 transitions. Second operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (8), 7 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:30:36,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:30:36,794 INFO L93 Difference]: Finished difference Result 780 states and 1112 transitions. [2021-10-15 19:30:36,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-15 19:30:36,795 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 780 states and 1112 transitions. [2021-10-15 19:30:36,815 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-10-15 19:30:36,839 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 780 states to 765 states and 1091 transitions. [2021-10-15 19:30:36,840 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 275 [2021-10-15 19:30:36,840 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 275 [2021-10-15 19:30:36,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 765 states and 1091 transitions. [2021-10-15 19:30:36,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-15 19:30:36,849 INFO L681 BuchiCegarLoop]: Abstraction has 765 states and 1091 transitions. [2021-10-15 19:30:36,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states and 1091 transitions. [2021-10-15 19:30:36,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 747. [2021-10-15 19:30:36,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 471 states have (on average 1.1464968152866242) internal successors, (540), 511 states have internal predecessors, (540), 165 states have call successors, (197), 95 states have call predecessors, (197), 111 states have return successors, (322), 140 states have call predecessors, (322), 158 states have call successors, (322) [2021-10-15 19:30:36,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1059 transitions. [2021-10-15 19:30:36,883 INFO L704 BuchiCegarLoop]: Abstraction has 747 states and 1059 transitions. [2021-10-15 19:30:36,883 INFO L587 BuchiCegarLoop]: Abstraction has 747 states and 1059 transitions. [2021-10-15 19:30:36,883 INFO L425 BuchiCegarLoop]: ======== Iteration 8============ [2021-10-15 19:30:36,883 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 747 states and 1059 transitions. [2021-10-15 19:30:36,891 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-10-15 19:30:36,891 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-15 19:30:36,891 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-15 19:30:36,892 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [11, 10, 9, 8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:30:36,893 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-15 19:30:36,893 INFO L791 eck$LassoCheckResult]: Stem: 12516#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(14);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 12517#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 9; 12522#L29 call main_#t~ret9 := fibonacci(main_~x~0);< 12523#fibonacciENTRY ~n := #in~n; 12580#L17 assume !(~n < 1); 12581#L19 assume !(1 == ~n); 12575#L22 call #t~ret7 := fibonacci(~n - 1);< 12576#fibonacciENTRY ~n := #in~n; 12599#L17 assume !(~n < 1); 12578#L19 assume !(1 == ~n); 12573#L22 call #t~ret7 := fibonacci(~n - 1);< 12598#fibonacciENTRY ~n := #in~n; 12596#L17 assume !(~n < 1); 12594#L19 assume !(1 == ~n); 12583#L22 call #t~ret7 := fibonacci(~n - 1);< 12591#fibonacciENTRY ~n := #in~n; 12597#L17 assume !(~n < 1); 12595#L19 assume !(1 == ~n); 12587#L22 call #t~ret7 := fibonacci(~n - 1);< 12593#fibonacciENTRY ~n := #in~n; 12636#L17 assume !(~n < 1); 12635#L19 assume !(1 == ~n); 12609#L22 call #t~ret7 := fibonacci(~n - 1);< 12617#fibonacciENTRY ~n := #in~n; 12627#L17 assume !(~n < 1); 12625#L19 assume !(1 == ~n); 12607#L22 call #t~ret7 := fibonacci(~n - 1);< 12624#fibonacciENTRY ~n := #in~n; 12647#L17 assume !(~n < 1); 12646#L19 assume 1 == ~n;#res := 1; 12645#fibonacciFINAL assume true; 12641#fibonacciEXIT >#29#return; 12629#L22-1 call #t~ret8 := fibonacci(~n - 2);< 12631#fibonacciENTRY ~n := #in~n; 12665#L17 assume ~n < 1;#res := 0; 12661#fibonacciFINAL assume true; 12628#fibonacciEXIT >#31#return; 12626#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 12623#fibonacciFINAL assume true; 12616#fibonacciEXIT >#29#return; 12602#L22-1 call #t~ret8 := fibonacci(~n - 2);< 12613#fibonacciENTRY ~n := #in~n; 12670#L17 assume !(~n < 1); 12637#L19 assume !(1 == ~n); 12639#L22 call #t~ret7 := fibonacci(~n - 1);< 12664#fibonacciENTRY ~n := #in~n; 12811#L17 assume !(~n < 1); 12809#L19 assume !(1 == ~n); 12773#L22 call #t~ret7 := fibonacci(~n - 1);< 12776#fibonacciENTRY ~n := #in~n; 12924#L17 assume !(~n < 1); 12919#L19 assume !(1 == ~n); 12774#L22 [2021-10-15 19:30:36,893 INFO L793 eck$LassoCheckResult]: Loop: 12774#L22 call #t~ret7 := fibonacci(~n - 1);< 12776#fibonacciENTRY ~n := #in~n; 12924#L17 assume !(~n < 1); 12919#L19 assume !(1 == ~n); 12774#L22 [2021-10-15 19:30:36,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:36,894 INFO L82 PathProgramCache]: Analyzing trace with hash -38598875, now seen corresponding path program 3 times [2021-10-15 19:30:36,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:30:36,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362590734] [2021-10-15 19:30:36,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:36,895 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:30:36,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:37,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-10-15 19:30:37,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:37,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-15 19:30:37,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:37,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-15 19:30:37,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:37,142 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 84 proven. 91 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-15 19:30:37,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:30:37,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362590734] [2021-10-15 19:30:37,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362590734] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:30:37,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105517339] [2021-10-15 19:30:37,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:30:37,143 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:30:37,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:37,144 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:30:37,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-10-15 19:30:37,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-15 19:30:37,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:30:37,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-15 19:30:37,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:37,808 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 106 proven. 19 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-15 19:30:37,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105517339] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:30:37,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:30:37,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 24 [2021-10-15 19:30:37,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966067713] [2021-10-15 19:30:37,810 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-15 19:30:37,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:37,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1757801, now seen corresponding path program 4 times [2021-10-15 19:30:37,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:30:37,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019925132] [2021-10-15 19:30:37,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:37,812 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:30:37,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:30:37,820 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 19:30:37,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:30:37,823 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 19:30:37,886 INFO L210 LassoAnalysis]: Preferences: [2021-10-15 19:30:37,887 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-15 19:30:37,887 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-15 19:30:37,887 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-15 19:30:37,887 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-15 19:30:37,887 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:37,888 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-15 19:30:37,889 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-15 19:30:37,889 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration8_Loop [2021-10-15 19:30:37,889 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-15 19:30:37,889 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-15 19:30:37,890 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:37,900 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:37,902 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:37,904 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:37,949 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-15 19:30:37,949 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-15 19:30:37,949 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:37,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:37,950 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:37,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Waiting until timeout for monitored process [2021-10-15 19:30:37,951 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-15 19:30:37,951 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-15 19:30:37,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:37,991 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:37,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:37,992 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:37,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Waiting until timeout for monitored process [2021-10-15 19:30:37,994 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-15 19:30:37,994 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-15 19:30:45,483 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-15 19:30:45,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:45,487 INFO L210 LassoAnalysis]: Preferences: [2021-10-15 19:30:45,487 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-15 19:30:45,487 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-15 19:30:45,487 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-15 19:30:45,487 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-15 19:30:45,487 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:45,488 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-15 19:30:45,488 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-15 19:30:45,488 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration8_Loop [2021-10-15 19:30:45,488 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-15 19:30:45,488 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-15 19:30:45,489 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:45,502 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:45,510 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:45,512 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:45,550 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-15 19:30:45,550 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-15 19:30:45,550 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:45,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:45,551 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:45,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (53)] Waiting until timeout for monitored process [2021-10-15 19:30:45,553 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-15 19:30:45,561 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-15 19:30:45,561 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-15 19:30:45,561 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-15 19:30:45,561 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-15 19:30:45,562 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-15 19:30:45,562 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-15 19:30:45,562 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-15 19:30:45,563 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-15 19:30:45,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (53)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:45,586 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:45,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:45,589 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:45,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Waiting until timeout for monitored process [2021-10-15 19:30:45,590 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-15 19:30:45,598 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-15 19:30:45,598 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-15 19:30:45,599 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-15 19:30:45,599 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-15 19:30:45,599 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-15 19:30:45,600 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-15 19:30:45,600 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-15 19:30:45,604 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-15 19:30:45,606 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-10-15 19:30:45,607 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-10-15 19:30:45,607 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:45,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:45,608 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:45,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Waiting until timeout for monitored process [2021-10-15 19:30:45,609 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-15 19:30:45,609 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-15 19:30:45,609 INFO L513 LassoAnalysis]: Proved termination. [2021-10-15 19:30:45,609 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2021-10-15 19:30:45,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:45,633 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-15 19:30:45,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:45,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:45,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-15 19:30:45,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:45,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:46,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:46,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:30:46,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:46,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:30:46,366 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2021-10-15 19:30:46,367 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 747 states and 1059 transitions. cyclomatic complexity: 325 Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-15 19:30:46,430 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 747 states and 1059 transitions. cyclomatic complexity: 325. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 769 states and 1082 transitions. Complement of second has 18 states. [2021-10-15 19:30:46,431 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 [2021-10-15 19:30:46,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-15 19:30:46,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2021-10-15 19:30:46,432 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 52 letters. Loop has 4 letters. [2021-10-15 19:30:46,432 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 19:30:46,432 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-15 19:30:46,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:46,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:46,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-15 19:30:46,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:47,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:47,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:30:47,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:47,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:30:47,065 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2021-10-15 19:30:47,066 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 747 states and 1059 transitions. cyclomatic complexity: 325 Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-15 19:30:47,173 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 747 states and 1059 transitions. cyclomatic complexity: 325. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 954 states and 1301 transitions. Complement of second has 22 states. [2021-10-15 19:30:47,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2021-10-15 19:30:47,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-15 19:30:47,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2021-10-15 19:30:47,175 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 52 letters. Loop has 4 letters. [2021-10-15 19:30:47,175 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 19:30:47,175 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-15 19:30:47,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:47,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:47,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-15 19:30:47,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:47,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:47,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:30:47,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:47,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:30:47,846 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2021-10-15 19:30:47,846 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 747 states and 1059 transitions. cyclomatic complexity: 325 Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-15 19:30:47,931 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 747 states and 1059 transitions. cyclomatic complexity: 325. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 1015 states and 1404 transitions. Complement of second has 27 states. [2021-10-15 19:30:47,932 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 [2021-10-15 19:30:47,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-15 19:30:47,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2021-10-15 19:30:47,933 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 52 letters. Loop has 4 letters. [2021-10-15 19:30:47,934 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 19:30:47,934 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 56 letters. Loop has 4 letters. [2021-10-15 19:30:47,935 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 19:30:47,935 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 52 letters. Loop has 8 letters. [2021-10-15 19:30:47,936 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 19:30:47,936 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1015 states and 1404 transitions. [2021-10-15 19:30:47,952 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-10-15 19:30:47,965 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1015 states to 747 states and 1059 transitions. [2021-10-15 19:30:47,966 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 220 [2021-10-15 19:30:47,967 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 256 [2021-10-15 19:30:47,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 747 states and 1059 transitions. [2021-10-15 19:30:47,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-15 19:30:47,967 INFO L681 BuchiCegarLoop]: Abstraction has 747 states and 1059 transitions. [2021-10-15 19:30:47,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states and 1059 transitions. [2021-10-15 19:30:47,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 747. [2021-10-15 19:30:47,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 471 states have (on average 1.1464968152866242) internal successors, (540), 511 states have internal predecessors, (540), 165 states have call successors, (197), 95 states have call predecessors, (197), 111 states have return successors, (322), 140 states have call predecessors, (322), 158 states have call successors, (322) [2021-10-15 19:30:48,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1059 transitions. [2021-10-15 19:30:48,003 INFO L704 BuchiCegarLoop]: Abstraction has 747 states and 1059 transitions. [2021-10-15 19:30:48,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:30:48,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-15 19:30:48,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-10-15 19:30:48,005 INFO L87 Difference]: Start difference. First operand 747 states and 1059 transitions. Second operand has 24 states, 21 states have (on average 2.142857142857143) internal successors, (45), 15 states have internal predecessors, (45), 15 states have call successors, (17), 10 states have call predecessors, (17), 3 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2021-10-15 19:30:48,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:30:48,458 INFO L93 Difference]: Finished difference Result 428 states and 553 transitions. [2021-10-15 19:30:48,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-15 19:30:48,458 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 428 states and 553 transitions. [2021-10-15 19:30:48,465 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-15 19:30:48,472 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 428 states to 368 states and 488 transitions. [2021-10-15 19:30:48,472 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 152 [2021-10-15 19:30:48,473 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 168 [2021-10-15 19:30:48,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 368 states and 488 transitions. [2021-10-15 19:30:48,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-15 19:30:48,474 INFO L681 BuchiCegarLoop]: Abstraction has 368 states and 488 transitions. [2021-10-15 19:30:48,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states and 488 transitions. [2021-10-15 19:30:48,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 324. [2021-10-15 19:30:48,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 203 states have (on average 1.0886699507389161) internal successors, (221), 210 states have internal predecessors, (221), 73 states have call successors, (82), 41 states have call predecessors, (82), 48 states have return successors, (130), 72 states have call predecessors, (130), 65 states have call successors, (130) [2021-10-15 19:30:48,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 433 transitions. [2021-10-15 19:30:48,490 INFO L704 BuchiCegarLoop]: Abstraction has 324 states and 433 transitions. [2021-10-15 19:30:48,490 INFO L587 BuchiCegarLoop]: Abstraction has 324 states and 433 transitions. [2021-10-15 19:30:48,490 INFO L425 BuchiCegarLoop]: ======== Iteration 9============ [2021-10-15 19:30:48,490 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 324 states and 433 transitions. [2021-10-15 19:30:48,494 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-15 19:30:48,494 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-15 19:30:48,494 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-15 19:30:48,496 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [14, 13, 11, 10, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2021-10-15 19:30:48,496 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-15 19:30:48,498 INFO L791 eck$LassoCheckResult]: Stem: 18028#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(14);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 18029#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 9; 18034#L29 call main_#t~ret9 := fibonacci(main_~x~0);< 18035#fibonacciENTRY ~n := #in~n; 18137#L17 assume !(~n < 1); 18136#L19 assume !(1 == ~n); 18112#L22 call #t~ret7 := fibonacci(~n - 1);< 18133#fibonacciENTRY ~n := #in~n; 18122#L17 assume !(~n < 1); 18119#L19 assume !(1 == ~n); 18114#L22 call #t~ret7 := fibonacci(~n - 1);< 18115#fibonacciENTRY ~n := #in~n; 18134#L17 assume !(~n < 1); 18131#L19 assume !(1 == ~n); 18128#L22 call #t~ret7 := fibonacci(~n - 1);< 18130#fibonacciENTRY ~n := #in~n; 18277#L17 assume !(~n < 1); 18142#L19 assume !(1 == ~n); 18124#L22 call #t~ret7 := fibonacci(~n - 1);< 18141#fibonacciENTRY ~n := #in~n; 18184#L17 assume !(~n < 1); 18183#L19 assume !(1 == ~n); 18145#L22 call #t~ret7 := fibonacci(~n - 1);< 18178#fibonacciENTRY ~n := #in~n; 18182#L17 assume !(~n < 1); 18181#L19 assume !(1 == ~n); 18147#L22 call #t~ret7 := fibonacci(~n - 1);< 18178#fibonacciENTRY ~n := #in~n; 18182#L17 assume !(~n < 1); 18181#L19 assume !(1 == ~n); 18147#L22 call #t~ret7 := fibonacci(~n - 1);< 18178#fibonacciENTRY ~n := #in~n; 18182#L17 assume !(~n < 1); 18181#L19 assume !(1 == ~n); 18147#L22 call #t~ret7 := fibonacci(~n - 1);< 18179#fibonacciENTRY ~n := #in~n; 18296#L17 assume !(~n < 1); 18295#L19 assume 1 == ~n;#res := 1; 18294#fibonacciFINAL assume true; 18291#fibonacciEXIT >#29#return; 18288#L22-1 call #t~ret8 := fibonacci(~n - 2);< 18290#fibonacciENTRY ~n := #in~n; 18298#L17 assume ~n < 1;#res := 0; 18297#fibonacciFINAL assume true; 18287#fibonacciEXIT >#31#return; 18286#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 18285#fibonacciFINAL assume true; 18282#fibonacciEXIT >#29#return; 18233#L22-1 call #t~ret8 := fibonacci(~n - 2);< 18236#fibonacciENTRY ~n := #in~n; 18250#L17 assume !(~n < 1); 18249#L19 assume 1 == ~n;#res := 1; 18050#fibonacciFINAL assume true; 18232#fibonacciEXIT >#31#return; 18229#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 18177#fibonacciFINAL assume true; 18170#fibonacciEXIT >#29#return; 17996#L22-1 call #t~ret8 := fibonacci(~n - 2);< 18152#fibonacciENTRY ~n := #in~n; 18059#L17 assume !(~n < 1); 18049#L19 assume !(1 == ~n); 18037#L22 call #t~ret7 := fibonacci(~n - 1);< 18099#fibonacciENTRY ~n := #in~n; 18101#L17 assume !(~n < 1); 18094#L19 assume !(1 == ~n); 18061#L22 call #t~ret7 := fibonacci(~n - 1);< 18065#fibonacciENTRY ~n := #in~n; 18088#L17 assume !(~n < 1); 18083#L19 assume !(1 == ~n); 18063#L22 [2021-10-15 19:30:48,499 INFO L793 eck$LassoCheckResult]: Loop: 18063#L22 call #t~ret7 := fibonacci(~n - 1);< 18065#fibonacciENTRY ~n := #in~n; 18088#L17 assume !(~n < 1); 18083#L19 assume !(1 == ~n); 18063#L22 [2021-10-15 19:30:48,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:48,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1676674629, now seen corresponding path program 4 times [2021-10-15 19:30:48,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:30:48,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65444721] [2021-10-15 19:30:48,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:48,500 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:30:48,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:48,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-10-15 19:30:48,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:48,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-15 19:30:48,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:48,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-15 19:30:48,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:48,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-15 19:30:48,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:48,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-10-15 19:30:48,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:48,784 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 184 proven. 96 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-15 19:30:48,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:30:48,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65444721] [2021-10-15 19:30:48,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65444721] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:30:48,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662555715] [2021-10-15 19:30:48,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 19:30:48,786 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:30:48,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:48,787 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:30:48,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-10-15 19:30:49,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 19:30:49,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:30:49,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-15 19:30:49,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:49,574 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 184 proven. 96 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-15 19:30:49,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662555715] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:30:49,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:30:49,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 22 [2021-10-15 19:30:49,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692681818] [2021-10-15 19:30:49,576 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-15 19:30:49,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:49,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1757801, now seen corresponding path program 5 times [2021-10-15 19:30:49,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:30:49,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087301990] [2021-10-15 19:30:49,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:49,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:30:49,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:30:49,606 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 19:30:49,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:30:49,608 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 19:30:49,670 INFO L210 LassoAnalysis]: Preferences: [2021-10-15 19:30:49,670 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-15 19:30:49,670 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-15 19:30:49,671 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-15 19:30:49,671 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-15 19:30:49,671 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:49,671 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-15 19:30:49,671 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-15 19:30:49,672 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration9_Loop [2021-10-15 19:30:49,672 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-15 19:30:49,672 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-15 19:30:49,673 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:49,675 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:49,678 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:49,688 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:49,735 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-15 19:30:49,735 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-15 19:30:49,735 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:49,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:49,741 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:49,746 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-15 19:30:49,746 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-15 19:30:49,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (57)] Waiting until timeout for monitored process [2021-10-15 19:30:49,771 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-15 19:30:49,771 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-15 19:30:49,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (57)] Ended with exit code 0 [2021-10-15 19:30:49,800 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:49,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:49,801 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:49,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (58)] Waiting until timeout for monitored process [2021-10-15 19:30:49,802 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-15 19:30:49,803 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-15 19:30:49,812 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-15 19:30:49,813 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret8=0} Honda state: {fibonacci_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-15 19:30:49,837 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (58)] Ended with exit code 0 [2021-10-15 19:30:49,838 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:49,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:49,839 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:49,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (59)] Waiting until timeout for monitored process [2021-10-15 19:30:49,846 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-15 19:30:49,847 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-15 19:30:49,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (59)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:49,924 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:49,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:49,925 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:49,927 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-15 19:30:49,928 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-15 19:30:49,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (60)] Waiting until timeout for monitored process [2021-10-15 19:30:57,331 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-15 19:30:57,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (60)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:57,336 INFO L210 LassoAnalysis]: Preferences: [2021-10-15 19:30:57,336 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-15 19:30:57,336 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-15 19:30:57,336 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-15 19:30:57,336 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-15 19:30:57,336 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:57,336 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-15 19:30:57,336 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-15 19:30:57,336 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration9_Loop [2021-10-15 19:30:57,337 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-15 19:30:57,337 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-15 19:30:57,338 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:57,353 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:57,356 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:57,358 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 19:30:57,399 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-15 19:30:57,399 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-15 19:30:57,399 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:57,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:57,402 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:57,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (61)] Waiting until timeout for monitored process [2021-10-15 19:30:57,404 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-15 19:30:57,413 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-15 19:30:57,413 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-15 19:30:57,413 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-15 19:30:57,413 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-15 19:30:57,413 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-15 19:30:57,414 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-15 19:30:57,415 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-15 19:30:57,417 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-15 19:30:57,419 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-10-15 19:30:57,419 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-10-15 19:30:57,420 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:30:57,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:57,421 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:57,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (62)] Waiting until timeout for monitored process [2021-10-15 19:30:57,422 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-15 19:30:57,422 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-15 19:30:57,422 INFO L513 LassoAnalysis]: Proved termination. [2021-10-15 19:30:57,422 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2021-10-15 19:30:57,447 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (61)] Ended with exit code 0 [2021-10-15 19:30:57,447 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-15 19:30:57,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:57,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:57,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-15 19:30:57,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:58,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (62)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:58,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:58,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:30:58,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:58,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:30:58,468 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2021-10-15 19:30:58,469 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 324 states and 433 transitions. cyclomatic complexity: 113 Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-15 19:30:58,530 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 324 states and 433 transitions. cyclomatic complexity: 113. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 343 states and 453 transitions. Complement of second has 18 states. [2021-10-15 19:30:58,531 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 [2021-10-15 19:30:58,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-15 19:30:58,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2021-10-15 19:30:58,532 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 69 letters. Loop has 4 letters. [2021-10-15 19:30:58,532 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 19:30:58,532 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-15 19:30:58,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:58,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:58,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-15 19:30:58,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:59,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:59,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:30:59,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:59,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:30:59,462 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2021-10-15 19:30:59,463 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 324 states and 433 transitions. cyclomatic complexity: 113 Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-15 19:30:59,544 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 324 states and 433 transitions. cyclomatic complexity: 113. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 349 states and 459 transitions. Complement of second has 17 states. [2021-10-15 19:30:59,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2021-10-15 19:30:59,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-15 19:30:59,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2021-10-15 19:30:59,551 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 69 letters. Loop has 4 letters. [2021-10-15 19:30:59,551 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 19:30:59,552 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-15 19:30:59,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:59,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:59,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-15 19:30:59,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:31:00,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:31:00,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:31:00,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:31:00,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:31:00,530 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2021-10-15 19:31:00,531 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 324 states and 433 transitions. cyclomatic complexity: 113 Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-15 19:31:00,615 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 324 states and 433 transitions. cyclomatic complexity: 113. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 430 states and 563 transitions. Complement of second has 27 states. [2021-10-15 19:31:00,616 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 [2021-10-15 19:31:00,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-15 19:31:00,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2021-10-15 19:31:00,617 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 69 letters. Loop has 4 letters. [2021-10-15 19:31:00,618 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 19:31:00,618 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 73 letters. Loop has 4 letters. [2021-10-15 19:31:00,618 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 19:31:00,619 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 69 letters. Loop has 8 letters. [2021-10-15 19:31:00,619 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 19:31:00,620 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 430 states and 563 transitions. [2021-10-15 19:31:00,625 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-15 19:31:00,630 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 430 states to 332 states and 443 transitions. [2021-10-15 19:31:00,631 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 123 [2021-10-15 19:31:00,631 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 135 [2021-10-15 19:31:00,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 332 states and 443 transitions. [2021-10-15 19:31:00,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-15 19:31:00,632 INFO L681 BuchiCegarLoop]: Abstraction has 332 states and 443 transitions. [2021-10-15 19:31:00,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states and 443 transitions. [2021-10-15 19:31:00,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 324. [2021-10-15 19:31:00,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 203 states have (on average 1.0886699507389161) internal successors, (221), 210 states have internal predecessors, (221), 73 states have call successors, (82), 41 states have call predecessors, (82), 48 states have return successors, (130), 72 states have call predecessors, (130), 65 states have call successors, (130) [2021-10-15 19:31:00,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 433 transitions. [2021-10-15 19:31:00,644 INFO L704 BuchiCegarLoop]: Abstraction has 324 states and 433 transitions. [2021-10-15 19:31:00,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:31:00,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-15 19:31:00,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-10-15 19:31:00,646 INFO L87 Difference]: Start difference. First operand 324 states and 433 transitions. Second operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 13 states have internal predecessors, (40), 11 states have call successors, (13), 11 states have call predecessors, (13), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-15 19:31:01,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:31:01,076 INFO L93 Difference]: Finished difference Result 407 states and 502 transitions. [2021-10-15 19:31:01,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-15 19:31:01,077 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 407 states and 502 transitions. [2021-10-15 19:31:01,082 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-15 19:31:01,083 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 407 states to 0 states and 0 transitions. [2021-10-15 19:31:01,083 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-10-15 19:31:01,083 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-10-15 19:31:01,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-10-15 19:31:01,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:31:01,084 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-15 19:31:01,084 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-15 19:31:01,084 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-15 19:31:01,084 INFO L425 BuchiCegarLoop]: ======== Iteration 10============ [2021-10-15 19:31:01,084 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-10-15 19:31:01,085 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-15 19:31:01,085 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-10-15 19:31:01,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 15.10 07:31:01 BoogieIcfgContainer [2021-10-15 19:31:01,092 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-10-15 19:31:01,093 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:31:01,093 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:31:01,093 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:31:01,094 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:30:11" (3/4) ... [2021-10-15 19:31:01,098 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-15 19:31:01,098 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:31:01,100 INFO L168 Benchmark]: Toolchain (without parser) took 50624.12 ms. Allocated memory was 107.0 MB in the beginning and 205.5 MB in the end (delta: 98.6 MB). Free memory was 69.4 MB in the beginning and 50.7 MB in the end (delta: 18.7 MB). Peak memory consumption was 117.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:31:01,101 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 107.0 MB. Free memory is still 85.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:31:01,101 INFO L168 Benchmark]: CACSL2BoogieTranslator took 282.69 ms. Allocated memory is still 107.0 MB. Free memory was 69.2 MB in the beginning and 82.7 MB in the end (delta: -13.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:31:01,102 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.97 ms. Allocated memory is still 107.0 MB. Free memory was 82.7 MB in the beginning and 81.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:31:01,102 INFO L168 Benchmark]: Boogie Preprocessor took 40.69 ms. Allocated memory is still 107.0 MB. Free memory was 81.1 MB in the beginning and 80.5 MB in the end (delta: 676.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:31:01,103 INFO L168 Benchmark]: RCFGBuilder took 400.34 ms. Allocated memory is still 107.0 MB. Free memory was 80.5 MB in the beginning and 71.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:31:01,103 INFO L168 Benchmark]: BuchiAutomizer took 49828.22 ms. Allocated memory was 107.0 MB in the beginning and 205.5 MB in the end (delta: 98.6 MB). Free memory was 71.3 MB in the beginning and 51.8 MB in the end (delta: 19.5 MB). Peak memory consumption was 120.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:31:01,104 INFO L168 Benchmark]: Witness Printer took 5.63 ms. Allocated memory is still 205.5 MB. Free memory was 51.8 MB in the beginning and 50.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:31:01,106 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 107.0 MB. Free memory is still 85.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 282.69 ms. Allocated memory is still 107.0 MB. Free memory was 69.2 MB in the beginning and 82.7 MB in the end (delta: -13.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 56.97 ms. Allocated memory is still 107.0 MB. Free memory was 82.7 MB in the beginning and 81.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 40.69 ms. Allocated memory is still 107.0 MB. Free memory was 81.1 MB in the beginning and 80.5 MB in the end (delta: 676.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 400.34 ms. Allocated memory is still 107.0 MB. Free memory was 80.5 MB in the beginning and 71.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 49828.22 ms. Allocated memory was 107.0 MB in the beginning and 205.5 MB in the end (delta: 98.6 MB). Free memory was 71.3 MB in the beginning and 51.8 MB in the end (delta: 19.5 MB). Peak memory consumption was 120.2 MB. Max. memory is 16.1 GB. * Witness Printer took 5.63 ms. Allocated memory is still 205.5 MB. Free memory was 51.8 MB in the beginning and 50.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 15 terminating modules (8 trivial, 3 deterministic, 4 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 9 locations. One deterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function n and consists of 10 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. 8 modules have a trivial ranking function, the largest among these consists of 24 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 49.7s and 10 iterations. TraceHistogramMax:14. Analysis of lassos took 34.3s. Construction of modules took 1.7s. Büchi inclusion checks took 12.7s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 14. Automata minimization 416.4ms AutomataMinimizationTime, 14 MinimizatonAttempts, 391 StatesRemovedByMinimization, 11 NontrivialMinimizations. Non-live state removal took 0.3s Buchi closure took 0.0s. Biggest automaton had 747 states and ocurred in iteration 7. Nontrivial modules had stage [2, 1, 4, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 8/26 HoareTripleCheckerStatistics: 326 SDtfs, 767 SDslu, 583 SDs, 0 SdLazy, 1966 SolverSat, 509 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1728.3ms Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI2 SILT6 lasso0 LassoPreprocessingBenchmarks: Lassos: inital17 mio100 ax100 hnf98 lsp95 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq181 hnf93 smp77 dnf100 smp100 tf109 neg96 sie109 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 38ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 15 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 7 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 24.9s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-10-15 19:31:01,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-10-15 19:31:01,373 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-10-15 19:31:01,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-10-15 19:31:01,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-15 19:31:01,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-10-15 19:31:02,158 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-10-15 19:31:02,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-10-15 19:31:02,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-10-15 19:31:02,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33290c06-aabc-4f09-9ff0-b1e715d6acd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...