./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 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive/Fibonacci02.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 675300a4b632e073b31d1e86ab5660e0c5ab887b ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 01:12:55,225 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 01:12:55,228 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 01:12:55,288 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 01:12:55,289 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 01:12:55,295 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 01:12:55,298 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 01:12:55,304 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 01:12:55,308 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 01:12:55,316 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 01:12:55,318 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 01:12:55,321 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 01:12:55,322 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 01:12:55,326 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 01:12:55,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 01:12:55,336 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 01:12:55,338 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 01:12:55,340 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 01:12:55,343 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 01:12:55,352 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 01:12:55,354 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 01:12:55,356 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 01:12:55,358 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 01:12:55,360 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 01:12:55,364 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 01:12:55,365 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 01:12:55,366 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 01:12:55,367 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 01:12:55,368 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 01:12:55,370 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 01:12:55,371 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 01:12:55,372 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 01:12:55,373 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 01:12:55,374 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 01:12:55,376 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 01:12:55,376 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 01:12:55,377 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 01:12:55,378 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 01:12:55,378 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 01:12:55,379 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 01:12:55,380 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 01:12:55,382 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-10-13 01:12:55,416 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 01:12:55,416 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 01:12:55,417 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 01:12:55,417 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 01:12:55,419 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 01:12:55,419 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 01:12:55,419 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 01:12:55,420 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-10-13 01:12:55,420 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-10-13 01:12:55,420 INFO L138 SettingsManager]: * Use old map elimination=false [2021-10-13 01:12:55,420 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-10-13 01:12:55,421 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-10-13 01:12:55,421 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-10-13 01:12:55,421 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 01:12:55,422 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 01:12:55,422 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 01:12:55,422 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 01:12:55,423 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 01:12:55,423 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 01:12:55,423 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-10-13 01:12:55,423 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-10-13 01:12:55,424 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-10-13 01:12:55,424 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 01:12:55,424 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 01:12:55,424 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-10-13 01:12:55,425 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 01:12:55,425 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-10-13 01:12:55,425 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 01:12:55,426 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 01:12:55,426 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 01:12:55,426 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 01:12:55,427 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 01:12:55,428 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-10-13 01:12:55,428 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_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 675300a4b632e073b31d1e86ab5660e0c5ab887b [2021-10-13 01:12:55,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 01:12:55,881 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 01:12:55,884 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 01:12:55,886 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 01:12:55,888 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 01:12:55,889 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/recursive/Fibonacci02.c [2021-10-13 01:12:55,994 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/data/f589c5f21/6b6d65dc6a444c1a8d4a81819686fd7c/FLAG490da7af8 [2021-10-13 01:12:56,728 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 01:12:56,729 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/sv-benchmarks/c/recursive/Fibonacci02.c [2021-10-13 01:12:56,743 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/data/f589c5f21/6b6d65dc6a444c1a8d4a81819686fd7c/FLAG490da7af8 [2021-10-13 01:12:57,048 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/data/f589c5f21/6b6d65dc6a444c1a8d4a81819686fd7c [2021-10-13 01:12:57,052 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 01:12:57,054 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 01:12:57,062 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 01:12:57,063 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 01:12:57,067 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 01:12:57,069 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:12:57" (1/1) ... [2021-10-13 01:12:57,071 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a94e66b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:12:57, skipping insertion in model container [2021-10-13 01:12:57,072 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:12:57" (1/1) ... [2021-10-13 01:12:57,084 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 01:12:57,102 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 01:12:57,336 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_3819dab0-a8a5-4f1a-b9da-e53a351b04de/sv-benchmarks/c/recursive/Fibonacci02.c[715,728] [2021-10-13 01:12:57,342 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 01:12:57,354 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 01:12:57,371 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_3819dab0-a8a5-4f1a-b9da-e53a351b04de/sv-benchmarks/c/recursive/Fibonacci02.c[715,728] [2021-10-13 01:12:57,371 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 01:12:57,389 INFO L208 MainTranslator]: Completed translation [2021-10-13 01:12:57,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:12:57 WrapperNode [2021-10-13 01:12:57,390 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 01:12:57,392 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 01:12:57,392 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 01:12:57,392 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 01:12:57,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:12:57" (1/1) ... [2021-10-13 01:12:57,412 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:12:57" (1/1) ... [2021-10-13 01:12:57,437 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 01:12:57,438 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 01:12:57,438 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 01:12:57,438 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 01:12:57,451 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:12:57" (1/1) ... [2021-10-13 01:12:57,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:12:57" (1/1) ... [2021-10-13 01:12:57,453 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:12:57" (1/1) ... [2021-10-13 01:12:57,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:12:57" (1/1) ... [2021-10-13 01:12:57,458 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:12:57" (1/1) ... [2021-10-13 01:12:57,460 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:12:57" (1/1) ... [2021-10-13 01:12:57,462 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:12:57" (1/1) ... [2021-10-13 01:12:57,464 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 01:12:57,466 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 01:12:57,466 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 01:12:57,466 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 01:12:57,468 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:12:57" (1/1) ... [2021-10-13 01:12:57,480 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:12:57,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:12:57,511 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:12:57,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-10-13 01:12:57,571 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2021-10-13 01:12:57,571 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2021-10-13 01:12:57,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 01:12:57,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 01:12:57,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 01:12:57,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 01:12:57,877 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 01:12:57,877 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-13 01:12:57,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:12:57 BoogieIcfgContainer [2021-10-13 01:12:57,880 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 01:12:57,886 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-10-13 01:12:57,887 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-10-13 01:12:57,891 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-10-13 01:12:57,892 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-13 01:12:57,892 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 13.10 01:12:57" (1/3) ... [2021-10-13 01:12:57,894 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4d742e1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 13.10 01:12:57, skipping insertion in model container [2021-10-13 01:12:57,894 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-13 01:12:57,896 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:12:57" (2/3) ... [2021-10-13 01:12:57,896 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4d742e1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 13.10 01:12:57, skipping insertion in model container [2021-10-13 01:12:57,896 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-13 01:12:57,897 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:12:57" (3/3) ... [2021-10-13 01:12:57,898 INFO L389 chiAutomizerObserver]: Analyzing ICFG Fibonacci02.c [2021-10-13 01:12:57,986 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-10-13 01:12:57,987 INFO L360 BuchiCegarLoop]: Hoare is false [2021-10-13 01:12:57,987 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-10-13 01:12:57,987 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-13 01:12:57,987 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-13 01:12:57,987 INFO L364 BuchiCegarLoop]: Difference is false [2021-10-13 01:12:57,987 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-13 01:12:57,988 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-10-13 01:12:58,010 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) [2021-10-13 01:12:58,057 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-13 01:12:58,058 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 01:12:58,058 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 01:12:58,067 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-10-13 01:12:58,067 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-13 01:12:58,067 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-10-13 01:12:58,068 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) [2021-10-13 01:12:58,073 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-13 01:12:58,073 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 01:12:58,073 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 01:12:58,074 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-10-13 01:12:58,075 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-13 01:12:58,084 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 [2021-10-13 01:12:58,085 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 [2021-10-13 01:12:58,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:12:58,096 INFO L82 PathProgramCache]: Analyzing trace with hash 42781, now seen corresponding path program 1 times [2021-10-13 01:12:58,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:12:58,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883565004] [2021-10-13 01:12:58,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:12:58,114 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:12:58,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 01:12:58,295 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 01:12:58,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 01:12:58,378 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 01:12:58,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:12:58,382 INFO L82 PathProgramCache]: Analyzing trace with hash 927641, now seen corresponding path program 1 times [2021-10-13 01:12:58,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:12:58,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150978750] [2021-10-13 01:12:58,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:12:58,383 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:12:58,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 01:12:58,390 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 01:12:58,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 01:12:58,397 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 01:12:58,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:12:58,399 INFO L82 PathProgramCache]: Analyzing trace with hash 854450357, now seen corresponding path program 1 times [2021-10-13 01:12:58,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:12:58,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118552658] [2021-10-13 01:12:58,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:12:58,400 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:12:58,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 01:12:58,421 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 01:12:58,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 01:12:58,464 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 01:12:58,657 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 01:12:58,658 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 01:12:58,658 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 01:12:58,658 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 01:12:58,658 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-13 01:12:58,658 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:12:58,659 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 01:12:58,659 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 01:12:58,659 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration1_Loop [2021-10-13 01:12:58,659 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 01:12:58,660 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 01:12:58,680 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:12:58,705 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:12:58,709 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:12:58,713 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:12:58,717 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:12:58,851 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 01:12:58,852 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-13 01:12:58,855 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:12:58,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:12:58,858 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:12:58,866 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 01:12:58,866 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 01:12:58,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-10-13 01:12:58,902 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 01:12:58,903 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 01:12:58,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-10-13 01:12:58,949 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:12:58,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:12:58,951 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:12:58,959 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 01:12:58,959 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 01:12:58,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-10-13 01:12:58,994 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 01:12:58,995 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret7=0} Honda state: {fibonacci_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 01:12:59,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-10-13 01:12:59,046 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:12:59,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:12:59,050 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:12:59,058 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 01:12:59,059 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 01:12:59,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-10-13 01:12:59,089 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 01:12:59,090 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret8=0} Honda state: {fibonacci_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 01:12:59,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-10-13 01:12:59,141 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:12:59,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:12:59,146 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:12:59,154 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 01:12:59,155 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 01:12:59,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-10-13 01:12:59,178 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 01:12:59,178 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_~n=0} Honda state: {fibonacci_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 01:12:59,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-10-13 01:12:59,230 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:12:59,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:12:59,232 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:12:59,242 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 01:12:59,242 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 01:12:59,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-10-13 01:12:59,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-10-13 01:12:59,325 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:12:59,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:12:59,328 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:12:59,335 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-13 01:12:59,335 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 01:12:59,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-10-13 01:12:59,477 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-13 01:12:59,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Ended with exit code 0 [2021-10-13 01:12:59,483 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 01:12:59,483 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 01:12:59,483 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 01:12:59,483 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 01:12:59,483 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-13 01:12:59,484 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:12:59,484 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 01:12:59,484 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 01:12:59,484 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration1_Loop [2021-10-13 01:12:59,484 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 01:12:59,484 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 01:12:59,487 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:12:59,491 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:12:59,494 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:12:59,498 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:12:59,501 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:12:59,581 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 01:12:59,589 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-13 01:12:59,591 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:12:59,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:12:59,593 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:12:59,599 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 01:12:59,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-10-13 01:12:59,614 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 01:12:59,614 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 01:12:59,615 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 01:12:59,615 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 01:12:59,615 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 01:12:59,618 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 01:12:59,618 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 01:12:59,633 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 01:12:59,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-10-13 01:12:59,675 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:12:59,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:12:59,677 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:12:59,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-10-13 01:12:59,685 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 01:12:59,697 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 01:12:59,697 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 01:12:59,697 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 01:12:59,698 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 01:12:59,698 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 01:12:59,699 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 01:12:59,699 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 01:12:59,713 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 01:12:59,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-10-13 01:12:59,749 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:12:59,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:12:59,751 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:12:59,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-10-13 01:12:59,753 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 01:12:59,765 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 01:12:59,765 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 01:12:59,766 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 01:12:59,766 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 01:12:59,766 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 01:12:59,767 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 01:12:59,767 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 01:12:59,783 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 01:12:59,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-10-13 01:12:59,809 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:12:59,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:12:59,811 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:12:59,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-10-13 01:12:59,813 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 01:12:59,823 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 01:12:59,823 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 01:12:59,823 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 01:12:59,824 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 01:12:59,824 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 01:12:59,826 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 01:12:59,826 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 01:12:59,829 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 01:12:59,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-10-13 01:12:59,856 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:12:59,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:12:59,858 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:12:59,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-10-13 01:12:59,864 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 01:12:59,874 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 01:12:59,874 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 01:12:59,874 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 01:12:59,875 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 01:12:59,875 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 01:12:59,877 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 01:12:59,877 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 01:12:59,905 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-13 01:12:59,928 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-13 01:12:59,928 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-13 01:12:59,930 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:12:59,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:12:59,932 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:12:59,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-10-13 01:12:59,934 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-13 01:12:59,934 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-13 01:12:59,934 INFO L513 LassoAnalysis]: Proved termination. [2021-10-13 01:12:59,935 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] [2021-10-13 01:12:59,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-10-13 01:12:59,969 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-13 01:13:00,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:00,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:00,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 01:13:00,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:00,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:00,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 01:13:00,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:00,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:00,242 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 [2021-10-13 01:13:00,244 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) [2021-10-13 01:13:00,375 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. [2021-10-13 01:13:00,375 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 [2021-10-13 01:13:00,378 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) [2021-10-13 01:13:00,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2021-10-13 01:13:00,381 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2021-10-13 01:13:00,383 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 01:13:00,384 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2021-10-13 01:13:00,384 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 01:13:00,384 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2021-10-13 01:13:00,385 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 01:13:00,386 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 47 states and 59 transitions. [2021-10-13 01:13:00,392 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-13 01:13:00,401 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 47 states to 25 states and 34 transitions. [2021-10-13 01:13:00,402 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2021-10-13 01:13:00,403 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2021-10-13 01:13:00,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2021-10-13 01:13:00,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 01:13:00,404 INFO L681 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-10-13 01:13:00,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2021-10-13 01:13:00,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2021-10-13 01:13:00,434 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) [2021-10-13 01:13:00,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2021-10-13 01:13:00,437 INFO L704 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-10-13 01:13:00,437 INFO L587 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-10-13 01:13:00,437 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-10-13 01:13:00,438 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2021-10-13 01:13:00,456 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-13 01:13:00,456 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 01:13:00,456 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 01:13:00,458 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:00,458 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:00,459 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 [2021-10-13 01:13:00,459 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 [2021-10-13 01:13:00,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:00,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1391758089, now seen corresponding path program 1 times [2021-10-13 01:13:00,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:00,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913219433] [2021-10-13 01:13:00,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:00,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:00,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:00,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:00,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:13:00,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:00,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:13:00,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:00,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913219433] [2021-10-13 01:13:00,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913219433] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:13:00,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:13:00,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 01:13:00,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258736544] [2021-10-13 01:13:00,613 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-13 01:13:00,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:00,614 INFO L82 PathProgramCache]: Analyzing trace with hash 924369961, now seen corresponding path program 1 times [2021-10-13 01:13:00,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:00,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390818310] [2021-10-13 01:13:00,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:00,615 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:00,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:00,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-10-13 01:13:00,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:00,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:13:00,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:00,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390818310] [2021-10-13 01:13:00,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390818310] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:13:00,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:13:00,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 01:13:00,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073818958] [2021-10-13 01:13:00,676 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-13 01:13:00,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:13:00,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 01:13:00,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-13 01:13:00,683 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) [2021-10-13 01:13:00,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:00,815 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-10-13 01:13:00,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 01:13:00,817 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2021-10-13 01:13:00,819 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-13 01:13:00,821 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2021-10-13 01:13:00,821 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2021-10-13 01:13:00,822 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2021-10-13 01:13:00,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2021-10-13 01:13:00,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 01:13:00,822 INFO L681 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-10-13 01:13:00,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2021-10-13 01:13:00,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-13 01:13:00,826 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) [2021-10-13 01:13:00,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-10-13 01:13:00,828 INFO L704 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-10-13 01:13:00,828 INFO L587 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-10-13 01:13:00,828 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-10-13 01:13:00,828 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2021-10-13 01:13:00,846 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-13 01:13:00,846 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 01:13:00,846 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 01:13:00,847 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:00,848 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:00,848 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 [2021-10-13 01:13:00,848 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 [2021-10-13 01:13:00,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:00,849 INFO L82 PathProgramCache]: Analyzing trace with hash 194852287, now seen corresponding path program 1 times [2021-10-13 01:13:00,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:00,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688152956] [2021-10-13 01:13:00,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:00,850 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:00,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:00,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:13:00,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:00,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:00,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:00,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688152956] [2021-10-13 01:13:00,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688152956] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:13:00,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402793146] [2021-10-13 01:13:00,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:00,998 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:13:00,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:00,999 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:13:01,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-13 01:13:01,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:01,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 01:13:01,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:01,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:01,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402793146] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:13:01,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:13:01,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-13 01:13:01,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595326113] [2021-10-13 01:13:01,200 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-13 01:13:01,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:01,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1409277793, now seen corresponding path program 1 times [2021-10-13 01:13:01,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:01,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410163856] [2021-10-13 01:13:01,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:01,203 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:01,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 01:13:01,225 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 01:13:01,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 01:13:01,239 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 01:13:01,477 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 01:13:01,478 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 01:13:01,478 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 01:13:01,478 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 01:13:01,478 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-13 01:13:01,479 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:01,479 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 01:13:01,479 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 01:13:01,479 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration3_Loop [2021-10-13 01:13:01,479 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 01:13:01,479 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 01:13:01,481 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:01,491 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:01,495 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:01,498 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:01,558 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 01:13:01,559 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-13 01:13:01,559 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:01,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:01,566 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:01,571 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 01:13:01,571 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 01:13:01,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-10-13 01:13:01,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:01,647 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:01,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:01,649 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:01,657 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-13 01:13:01,657 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 01:13:01,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-10-13 01:13:02,291 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-13 01:13:02,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:02,299 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 01:13:02,299 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 01:13:02,300 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 01:13:02,300 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 01:13:02,300 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-13 01:13:02,300 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:02,300 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 01:13:02,300 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 01:13:02,300 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration3_Loop [2021-10-13 01:13:02,300 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 01:13:02,301 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 01:13:02,302 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:02,326 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:02,330 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:02,334 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:02,393 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 01:13:02,394 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-13 01:13:02,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:02,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:02,398 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:02,404 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 [2021-10-13 01:13:02,416 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 01:13:02,417 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 01:13:02,417 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 01:13:02,417 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 01:13:02,417 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 01:13:02,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-10-13 01:13:02,421 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 01:13:02,421 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 01:13:02,430 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-13 01:13:02,441 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-13 01:13:02,441 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-13 01:13:02,442 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:02,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:02,479 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:02,484 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-13 01:13:02,484 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-13 01:13:02,484 INFO L513 LassoAnalysis]: Proved termination. [2021-10-13 01:13:02,485 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2021-10-13 01:13:02,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-10-13 01:13:02,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:02,528 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-13 01:13:02,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:02,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:02,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 01:13:02,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:02,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:02,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:02,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 01:13:02,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:03,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:03,127 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2021-10-13 01:13:03,128 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) [2021-10-13 01:13:03,495 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. [2021-10-13 01:13:03,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2021-10-13 01:13:03,496 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) [2021-10-13 01:13:03,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2021-10-13 01:13:03,499 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 10 letters. [2021-10-13 01:13:03,501 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 01:13:03,501 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 22 letters. Loop has 10 letters. [2021-10-13 01:13:03,502 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 01:13:03,502 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 20 letters. [2021-10-13 01:13:03,506 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 01:13:03,506 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 183 transitions. [2021-10-13 01:13:03,528 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-10-13 01:13:03,539 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 108 states and 152 transitions. [2021-10-13 01:13:03,540 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 64 [2021-10-13 01:13:03,542 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2021-10-13 01:13:03,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 152 transitions. [2021-10-13 01:13:03,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 01:13:03,543 INFO L681 BuchiCegarLoop]: Abstraction has 108 states and 152 transitions. [2021-10-13 01:13:03,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states and 152 transitions. [2021-10-13 01:13:03,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2021-10-13 01:13:03,585 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) [2021-10-13 01:13:03,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2021-10-13 01:13:03,592 INFO L704 BuchiCegarLoop]: Abstraction has 94 states and 126 transitions. [2021-10-13 01:13:03,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:13:03,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 01:13:03,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-13 01:13:03,595 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) [2021-10-13 01:13:03,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:03,734 INFO L93 Difference]: Finished difference Result 109 states and 147 transitions. [2021-10-13 01:13:03,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 01:13:03,735 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 109 states and 147 transitions. [2021-10-13 01:13:03,746 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-10-13 01:13:03,754 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 109 states to 106 states and 144 transitions. [2021-10-13 01:13:03,758 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 69 [2021-10-13 01:13:03,759 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2021-10-13 01:13:03,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 144 transitions. [2021-10-13 01:13:03,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 01:13:03,762 INFO L681 BuchiCegarLoop]: Abstraction has 106 states and 144 transitions. [2021-10-13 01:13:03,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states and 144 transitions. [2021-10-13 01:13:03,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2021-10-13 01:13:03,779 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) [2021-10-13 01:13:03,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 125 transitions. [2021-10-13 01:13:03,787 INFO L704 BuchiCegarLoop]: Abstraction has 94 states and 125 transitions. [2021-10-13 01:13:03,787 INFO L587 BuchiCegarLoop]: Abstraction has 94 states and 125 transitions. [2021-10-13 01:13:03,788 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-10-13 01:13:03,788 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 94 states and 125 transitions. [2021-10-13 01:13:03,791 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-10-13 01:13:03,791 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 01:13:03,791 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 01:13:03,798 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:03,799 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2021-10-13 01:13:03,800 INFO L791 eck$LassoCheckResult]: Stem: 754#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(14);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 755#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 9; 735#L29 call main_#t~ret9 := fibonacci(main_~x~0);< 761#fibonacciENTRY ~n := #in~n; 752#L17 assume !(~n < 1); 753#L19 assume !(1 == ~n); 744#L22 call #t~ret7 := fibonacci(~n - 1);< 743#fibonacciENTRY ~n := #in~n; 746#L17 assume !(~n < 1); 796#L19 assume !(1 == ~n); 745#L22 call #t~ret7 := fibonacci(~n - 1);< 743#fibonacciENTRY ~n := #in~n; 746#L17 assume !(~n < 1); 796#L19 assume !(1 == ~n); 745#L22 call #t~ret7 := fibonacci(~n - 1);< 743#fibonacciENTRY ~n := #in~n; 747#L17 assume !(~n < 1); 797#L19 assume 1 == ~n;#res := 1; 795#fibonacciFINAL assume true; 794#fibonacciEXIT >#29#return; 738#L22-1 call #t~ret8 := fibonacci(~n - 2);< 793#fibonacciENTRY ~n := #in~n; 824#L17 assume ~n < 1;#res := 0; 823#fibonacciFINAL assume true; 820#fibonacciEXIT >#31#return; 819#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 817#fibonacciFINAL assume true; 815#fibonacciEXIT >#29#return; 741#L22-1 [2021-10-13 01:13:03,801 INFO L793 eck$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 [2021-10-13 01:13:03,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:03,801 INFO L82 PathProgramCache]: Analyzing trace with hash 716279287, now seen corresponding path program 1 times [2021-10-13 01:13:03,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:03,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000037821] [2021-10-13 01:13:03,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:03,803 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:03,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:03,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-13 01:13:03,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:03,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 01:13:03,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:03,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 01:13:03,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:04,022 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 01:13:04,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:04,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000037821] [2021-10-13 01:13:04,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000037821] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:13:04,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331459785] [2021-10-13 01:13:04,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:04,025 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:13:04,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:04,034 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:13:04,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-13 01:13:04,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:04,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 01:13:04,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:04,281 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 01:13:04,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331459785] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:13:04,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:13:04,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-10-13 01:13:04,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030318777] [2021-10-13 01:13:04,283 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-13 01:13:04,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:04,284 INFO L82 PathProgramCache]: Analyzing trace with hash -202791443, now seen corresponding path program 1 times [2021-10-13 01:13:04,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:04,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237709958] [2021-10-13 01:13:04,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:04,285 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:04,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:04,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-10-13 01:13:04,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:04,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 01:13:04,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:04,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 01:13:04,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:04,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 01:13:04,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:04,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 01:13:04,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:04,421 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 26 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-13 01:13:04,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:04,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237709958] [2021-10-13 01:13:04,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237709958] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:13:04,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803721758] [2021-10-13 01:13:04,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:04,422 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:13:04,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:04,424 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:13:04,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-13 01:13:04,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:04,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 01:13:04,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:04,700 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-13 01:13:04,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803721758] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:13:04,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:13:04,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-10-13 01:13:04,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908382577] [2021-10-13 01:13:04,703 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-13 01:13:04,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:13:04,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 01:13:04,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-13 01:13:04,705 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) [2021-10-13 01:13:04,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:04,970 INFO L93 Difference]: Finished difference Result 116 states and 158 transitions. [2021-10-13 01:13:04,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 01:13:04,971 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 116 states and 158 transitions. [2021-10-13 01:13:04,976 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2021-10-13 01:13:04,984 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 116 states to 114 states and 156 transitions. [2021-10-13 01:13:04,984 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2021-10-13 01:13:04,985 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2021-10-13 01:13:04,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 114 states and 156 transitions. [2021-10-13 01:13:04,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 01:13:04,987 INFO L681 BuchiCegarLoop]: Abstraction has 114 states and 156 transitions. [2021-10-13 01:13:04,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states and 156 transitions. [2021-10-13 01:13:05,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-10-13 01:13:05,021 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) [2021-10-13 01:13:05,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 156 transitions. [2021-10-13 01:13:05,025 INFO L704 BuchiCegarLoop]: Abstraction has 114 states and 156 transitions. [2021-10-13 01:13:05,025 INFO L587 BuchiCegarLoop]: Abstraction has 114 states and 156 transitions. [2021-10-13 01:13:05,026 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-10-13 01:13:05,026 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 114 states and 156 transitions. [2021-10-13 01:13:05,030 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2021-10-13 01:13:05,031 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 01:13:05,031 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 01:13:05,034 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:05,034 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-10-13 01:13:05,035 INFO L791 eck$LassoCheckResult]: Stem: 1262#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(14);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 1263#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 9; 1246#L29 call main_#t~ret9 := fibonacci(main_~x~0);< 1268#fibonacciENTRY ~n := #in~n; 1306#L17 assume !(~n < 1); 1276#L19 assume !(1 == ~n); 1257#L22 call #t~ret7 := fibonacci(~n - 1);< 1256#fibonacciENTRY ~n := #in~n; 1258#L17 assume !(~n < 1); 1261#L19 assume !(1 == ~n); 1270#L22 call #t~ret7 := fibonacci(~n - 1);< 1300#fibonacciENTRY ~n := #in~n; 1304#L17 assume !(~n < 1); 1302#L19 assume !(1 == ~n); 1269#L22 call #t~ret7 := fibonacci(~n - 1);< 1300#fibonacciENTRY ~n := #in~n; 1304#L17 assume !(~n < 1); 1302#L19 assume !(1 == ~n); 1269#L22 call #t~ret7 := fibonacci(~n - 1);< 1300#fibonacciENTRY ~n := #in~n; 1305#L17 assume !(~n < 1); 1303#L19 assume 1 == ~n;#res := 1; 1301#fibonacciFINAL assume true; 1299#fibonacciEXIT >#29#return; 1249#L22-1 call #t~ret8 := fibonacci(~n - 2);< 1297#fibonacciENTRY ~n := #in~n; 1259#L17 assume ~n < 1;#res := 0; 1260#fibonacciFINAL assume true; 1264#fibonacciEXIT >#31#return; 1265#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1271#fibonacciFINAL assume true; 1277#fibonacciEXIT >#29#return; 1309#L22-1 [2021-10-13 01:13:05,035 INFO L793 eck$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 [2021-10-13 01:13:05,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:05,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1460678817, now seen corresponding path program 2 times [2021-10-13 01:13:05,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:05,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612603208] [2021-10-13 01:13:05,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:05,037 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:05,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:05,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-13 01:13:05,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:05,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 01:13:05,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:05,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 01:13:05,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:05,275 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 01:13:05,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:05,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612603208] [2021-10-13 01:13:05,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612603208] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:13:05,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201856208] [2021-10-13 01:13:05,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 01:13:05,277 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:13:05,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:05,279 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:13:05,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-13 01:13:05,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 01:13:05,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 01:13:05,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 01:13:05,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:05,551 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 01:13:05,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201856208] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:13:05,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:13:05,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-10-13 01:13:05,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483673914] [2021-10-13 01:13:05,553 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-13 01:13:05,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:05,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1166275439, now seen corresponding path program 2 times [2021-10-13 01:13:05,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:05,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234877389] [2021-10-13 01:13:05,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:05,556 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:05,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 01:13:05,588 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 01:13:05,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 01:13:05,612 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 01:13:06,014 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 01:13:06,014 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 01:13:06,014 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 01:13:06,014 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 01:13:06,014 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-13 01:13:06,015 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:06,015 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 01:13:06,015 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 01:13:06,015 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration5_Loop [2021-10-13 01:13:06,015 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 01:13:06,015 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 01:13:06,016 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:06,020 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:06,023 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:06,026 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:06,092 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 01:13:06,092 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-13 01:13:06,092 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:06,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:06,097 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:06,110 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 01:13:06,110 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 01:13:06,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2021-10-13 01:13:06,132 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 01:13:06,133 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 01:13:06,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:06,179 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:06,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:06,181 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:06,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2021-10-13 01:13:06,187 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 01:13:06,189 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 01:13:06,199 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 01:13:06,199 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret8=0} Honda state: {fibonacci_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 01:13:06,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Ended with exit code 0 [2021-10-13 01:13:06,232 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:06,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:06,233 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:06,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2021-10-13 01:13:06,235 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 01:13:06,236 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 01:13:06,246 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 01:13:06,246 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret7=1} Honda state: {fibonacci_#t~ret7=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 01:13:06,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:06,272 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:06,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:06,273 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:06,275 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 01:13:06,275 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 01:13:06,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2021-10-13 01:13:06,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:06,317 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:06,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:06,318 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:06,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2021-10-13 01:13:06,320 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-13 01:13:06,320 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 01:13:07,371 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-13 01:13:07,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:07,376 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 01:13:07,376 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 01:13:07,376 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 01:13:07,376 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 01:13:07,376 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-13 01:13:07,376 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:07,376 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 01:13:07,376 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 01:13:07,376 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration5_Loop [2021-10-13 01:13:07,376 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 01:13:07,376 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 01:13:07,377 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:07,390 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:07,394 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:07,400 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:07,475 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 01:13:07,475 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-13 01:13:07,475 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:07,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:07,477 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:07,486 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 01:13:07,498 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 01:13:07,499 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 01:13:07,499 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 01:13:07,499 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 01:13:07,499 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 01:13:07,504 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 01:13:07,504 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 01:13:07,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-10-13 01:13:07,522 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-13 01:13:07,537 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-13 01:13:07,538 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-13 01:13:07,538 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:07,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:07,541 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:07,546 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-13 01:13:07,546 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-13 01:13:07,546 INFO L513 LassoAnalysis]: Proved termination. [2021-10-13 01:13:07,546 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2021-10-13 01:13:07,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-10-13 01:13:07,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:07,587 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-13 01:13:07,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:07,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:07,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 01:13:07,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:08,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:08,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:08,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 01:13:08,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:08,521 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 01:13:08,523 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 [2021-10-13 01:13:08,523 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) [2021-10-13 01:13:08,879 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. [2021-10-13 01:13:08,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2021-10-13 01:13:08,883 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) [2021-10-13 01:13:08,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 41 transitions. [2021-10-13 01:13:08,885 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 32 letters. Loop has 22 letters. [2021-10-13 01:13:08,885 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 01:13:08,885 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-13 01:13:08,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:08,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:08,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 01:13:08,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:09,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:09,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 01:13:09,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:09,765 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 01:13:09,767 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 [2021-10-13 01:13:09,768 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) [2021-10-13 01:13:09,984 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. [2021-10-13 01:13:09,984 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 [2021-10-13 01:13:09,985 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) [2021-10-13 01:13:09,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 24 transitions. [2021-10-13 01:13:09,986 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 32 letters. Loop has 22 letters. [2021-10-13 01:13:09,986 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 01:13:09,986 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-13 01:13:09,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:10,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:10,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 01:13:10,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:10,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:10,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 01:13:10,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:10,749 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 01:13:10,750 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 [2021-10-13 01:13:10,751 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) [2021-10-13 01:13:11,113 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. [2021-10-13 01:13:11,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2021-10-13 01:13:11,114 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) [2021-10-13 01:13:11,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 46 transitions. [2021-10-13 01:13:11,115 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 32 letters. Loop has 22 letters. [2021-10-13 01:13:11,118 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 01:13:11,121 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 54 letters. Loop has 22 letters. [2021-10-13 01:13:11,127 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 01:13:11,129 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 32 letters. Loop has 44 letters. [2021-10-13 01:13:11,131 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 01:13:11,133 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1129 states and 1571 transitions. [2021-10-13 01:13:11,164 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 58 [2021-10-13 01:13:11,192 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1129 states to 638 states and 970 transitions. [2021-10-13 01:13:11,192 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 258 [2021-10-13 01:13:11,194 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 287 [2021-10-13 01:13:11,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 638 states and 970 transitions. [2021-10-13 01:13:11,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 01:13:11,195 INFO L681 BuchiCegarLoop]: Abstraction has 638 states and 970 transitions. [2021-10-13 01:13:11,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states and 970 transitions. [2021-10-13 01:13:11,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 469. [2021-10-13 01:13:11,239 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) [2021-10-13 01:13:11,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 677 transitions. [2021-10-13 01:13:11,248 INFO L704 BuchiCegarLoop]: Abstraction has 469 states and 677 transitions. [2021-10-13 01:13:11,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:13:11,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 01:13:11,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-10-13 01:13:11,250 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) [2021-10-13 01:13:11,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:11,537 INFO L93 Difference]: Finished difference Result 529 states and 758 transitions. [2021-10-13 01:13:11,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 01:13:11,538 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 529 states and 758 transitions. [2021-10-13 01:13:11,551 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-10-13 01:13:11,572 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 529 states to 526 states and 751 transitions. [2021-10-13 01:13:11,572 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 233 [2021-10-13 01:13:11,573 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 233 [2021-10-13 01:13:11,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 526 states and 751 transitions. [2021-10-13 01:13:11,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 01:13:11,574 INFO L681 BuchiCegarLoop]: Abstraction has 526 states and 751 transitions. [2021-10-13 01:13:11,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states and 751 transitions. [2021-10-13 01:13:11,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 486. [2021-10-13 01:13:11,613 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) [2021-10-13 01:13:11,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 698 transitions. [2021-10-13 01:13:11,618 INFO L704 BuchiCegarLoop]: Abstraction has 486 states and 698 transitions. [2021-10-13 01:13:11,618 INFO L587 BuchiCegarLoop]: Abstraction has 486 states and 698 transitions. [2021-10-13 01:13:11,619 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-10-13 01:13:11,619 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 486 states and 698 transitions. [2021-10-13 01:13:11,623 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-10-13 01:13:11,623 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 01:13:11,623 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 01:13:11,625 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:11,625 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-13 01:13:11,625 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 [2021-10-13 01:13:11,625 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 [2021-10-13 01:13:11,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:11,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1561489865, now seen corresponding path program 1 times [2021-10-13 01:13:11,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:11,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549975623] [2021-10-13 01:13:11,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:11,627 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:11,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:11,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-13 01:13:11,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:11,760 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 38 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 01:13:11,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:11,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549975623] [2021-10-13 01:13:11,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549975623] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:13:11,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462587035] [2021-10-13 01:13:11,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:11,762 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:13:11,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:11,763 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:13:11,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-13 01:13:12,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:12,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 01:13:12,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:12,203 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 38 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 01:13:12,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462587035] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:13:12,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:13:12,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-10-13 01:13:12,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176849318] [2021-10-13 01:13:12,205 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-13 01:13:12,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:12,206 INFO L82 PathProgramCache]: Analyzing trace with hash 927641, now seen corresponding path program 2 times [2021-10-13 01:13:12,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:12,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241760943] [2021-10-13 01:13:12,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:12,207 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:12,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 01:13:12,214 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 01:13:12,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 01:13:12,217 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 01:13:12,267 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 01:13:12,268 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 01:13:12,268 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 01:13:12,268 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 01:13:12,268 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-13 01:13:12,269 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:12,269 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 01:13:12,269 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 01:13:12,269 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration6_Loop [2021-10-13 01:13:12,269 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 01:13:12,269 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 01:13:12,270 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:12,273 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:12,275 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:12,277 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:12,285 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:12,333 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 01:13:12,333 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-13 01:13:12,334 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:12,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:12,341 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:12,344 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 01:13:12,344 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 01:13:12,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2021-10-13 01:13:12,366 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 01:13:12,366 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 01:13:12,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:12,409 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:12,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:12,414 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:12,416 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 01:13:12,417 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 01:13:12,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2021-10-13 01:13:12,437 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 01:13:12,438 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret8=0} Honda state: {fibonacci_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 01:13:12,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:12,485 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:12,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:12,487 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:12,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2021-10-13 01:13:12,490 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 01:13:12,490 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 01:13:12,517 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 01:13:12,517 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_~n=0} Honda state: {fibonacci_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 01:13:12,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:12,563 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:12,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:12,564 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:12,567 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 01:13:12,567 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 01:13:12,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2021-10-13 01:13:12,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:12,636 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:12,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:12,638 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:12,640 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-13 01:13:12,640 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 01:13:12,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2021-10-13 01:13:12,717 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-13 01:13:12,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:12,727 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 01:13:12,727 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 01:13:12,727 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 01:13:12,727 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 01:13:12,727 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-13 01:13:12,727 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:12,727 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 01:13:12,727 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 01:13:12,727 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration6_Loop [2021-10-13 01:13:12,728 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 01:13:12,728 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 01:13:12,729 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:12,732 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:12,735 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:12,743 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:12,746 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:12,794 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 01:13:12,795 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-13 01:13:12,795 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:12,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:12,796 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:12,802 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 01:13:12,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2021-10-13 01:13:12,814 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 01:13:12,814 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 01:13:12,814 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 01:13:12,814 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 01:13:12,814 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 01:13:12,815 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 01:13:12,815 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 01:13:12,817 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 01:13:12,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:12,844 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:12,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:12,845 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:12,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2021-10-13 01:13:12,847 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 01:13:12,857 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 01:13:12,857 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 01:13:12,857 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 01:13:12,857 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 01:13:12,857 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 01:13:12,858 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 01:13:12,858 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 01:13:12,861 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 01:13:12,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:12,889 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:12,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:12,891 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:12,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Waiting until timeout for monitored process [2021-10-13 01:13:12,894 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 01:13:12,903 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 01:13:12,903 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 01:13:12,903 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 01:13:12,903 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 01:13:12,903 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 01:13:12,905 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 01:13:12,905 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 01:13:12,907 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-13 01:13:12,910 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-13 01:13:12,910 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-13 01:13:12,910 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:12,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:12,912 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:12,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Waiting until timeout for monitored process [2021-10-13 01:13:12,914 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-13 01:13:12,917 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-13 01:13:12,917 INFO L513 LassoAnalysis]: Proved termination. [2021-10-13 01:13:12,917 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] [2021-10-13 01:13:12,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Ended with exit code 0 [2021-10-13 01:13:12,943 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-13 01:13:12,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:13,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:13,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 01:13:13,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:13,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:13,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:13,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 01:13:13,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:13,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:13,361 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 [2021-10-13 01:13:13,361 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) [2021-10-13 01:13:13,439 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. [2021-10-13 01:13:13,440 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 [2021-10-13 01:13:13,440 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) [2021-10-13 01:13:13,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2021-10-13 01:13:13,441 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 33 letters. Loop has 4 letters. [2021-10-13 01:13:13,441 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 01:13:13,441 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-13 01:13:13,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:13,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:13,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 01:13:13,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:13,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:13,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 01:13:13,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:13,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:13,779 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 [2021-10-13 01:13:13,779 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) [2021-10-13 01:13:13,854 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. [2021-10-13 01:13:13,855 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 [2021-10-13 01:13:13,856 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) [2021-10-13 01:13:13,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2021-10-13 01:13:13,856 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 33 letters. Loop has 4 letters. [2021-10-13 01:13:13,856 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 01:13:13,857 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-13 01:13:13,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:13,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 01:13:13,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:14,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:14,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 01:13:14,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:14,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:14,206 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 [2021-10-13 01:13:14,206 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) [2021-10-13 01:13:14,337 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. [2021-10-13 01:13:14,338 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 [2021-10-13 01:13:14,338 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) [2021-10-13 01:13:14,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2021-10-13 01:13:14,339 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 33 letters. Loop has 4 letters. [2021-10-13 01:13:14,340 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 01:13:14,340 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 37 letters. Loop has 4 letters. [2021-10-13 01:13:14,340 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 01:13:14,340 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 33 letters. Loop has 8 letters. [2021-10-13 01:13:14,341 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 01:13:14,341 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 640 states and 870 transitions. [2021-10-13 01:13:14,354 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-10-13 01:13:14,367 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 640 states to 538 states and 756 transitions. [2021-10-13 01:13:14,367 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 193 [2021-10-13 01:13:14,368 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 202 [2021-10-13 01:13:14,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 538 states and 756 transitions. [2021-10-13 01:13:14,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 01:13:14,368 INFO L681 BuchiCegarLoop]: Abstraction has 538 states and 756 transitions. [2021-10-13 01:13:14,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states and 756 transitions. [2021-10-13 01:13:14,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 508. [2021-10-13 01:13:14,389 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) [2021-10-13 01:13:14,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 720 transitions. [2021-10-13 01:13:14,396 INFO L704 BuchiCegarLoop]: Abstraction has 508 states and 720 transitions. [2021-10-13 01:13:14,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:13:14,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 01:13:14,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-10-13 01:13:14,398 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) [2021-10-13 01:13:14,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:14,647 INFO L93 Difference]: Finished difference Result 575 states and 818 transitions. [2021-10-13 01:13:14,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 01:13:14,648 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 575 states and 818 transitions. [2021-10-13 01:13:14,662 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-10-13 01:13:14,677 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 575 states to 565 states and 805 transitions. [2021-10-13 01:13:14,677 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 215 [2021-10-13 01:13:14,678 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 215 [2021-10-13 01:13:14,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 565 states and 805 transitions. [2021-10-13 01:13:14,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 01:13:14,679 INFO L681 BuchiCegarLoop]: Abstraction has 565 states and 805 transitions. [2021-10-13 01:13:14,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states and 805 transitions. [2021-10-13 01:13:14,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 531. [2021-10-13 01:13:14,704 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) [2021-10-13 01:13:14,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 755 transitions. [2021-10-13 01:13:14,711 INFO L704 BuchiCegarLoop]: Abstraction has 531 states and 755 transitions. [2021-10-13 01:13:14,711 INFO L587 BuchiCegarLoop]: Abstraction has 531 states and 755 transitions. [2021-10-13 01:13:14,711 INFO L425 BuchiCegarLoop]: ======== Iteration 7============ [2021-10-13 01:13:14,711 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 531 states and 755 transitions. [2021-10-13 01:13:14,717 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-10-13 01:13:14,718 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 01:13:14,718 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 01:13:14,722 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [9, 9, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:14,722 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-13 01:13:14,723 INFO L791 eck$LassoCheckResult]: Stem: 8705#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(14);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 8706#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 9; 8714#L29 call main_#t~ret9 := fibonacci(main_~x~0);< 8715#fibonacciENTRY ~n := #in~n; 8752#L17 assume !(~n < 1); 8750#L19 assume !(1 == ~n); 8747#L22 call #t~ret7 := fibonacci(~n - 1);< 8748#fibonacciENTRY ~n := #in~n; 8765#L17 assume !(~n < 1); 8763#L19 assume !(1 == ~n); 8759#L22 call #t~ret7 := fibonacci(~n - 1);< 8762#fibonacciENTRY ~n := #in~n; 8780#L17 assume !(~n < 1); 8779#L19 assume !(1 == ~n); 8755#L22 call #t~ret7 := fibonacci(~n - 1);< 8760#fibonacciENTRY ~n := #in~n; 8936#L17 assume !(~n < 1); 8873#L19 assume !(1 == ~n); 8776#L22 call #t~ret7 := fibonacci(~n - 1);< 8786#fibonacciENTRY ~n := #in~n; 8798#L17 assume !(~n < 1); 8795#L19 assume !(1 == ~n); 8775#L22 call #t~ret7 := fibonacci(~n - 1);< 8786#fibonacciENTRY ~n := #in~n; 8819#L17 assume !(~n < 1); 8843#L19 assume 1 == ~n;#res := 1; 8840#fibonacciFINAL assume true; 8820#fibonacciEXIT >#29#return; 8813#L22-1 call #t~ret8 := fibonacci(~n - 2);< 8818#fibonacciENTRY ~n := #in~n; 9046#L17 assume !(~n < 1); 9035#L19 assume !(1 == ~n); 8737#L22 call #t~ret7 := fibonacci(~n - 1);< 8736#fibonacciENTRY ~n := #in~n; 8740#L17 assume !(~n < 1); 9167#L19 assume !(1 == ~n); 8722#L22 call #t~ret7 := fibonacci(~n - 1);< 8733#fibonacciENTRY ~n := #in~n; 8734#L17 assume !(~n < 1); 9166#L19 assume !(1 == ~n); 8721#L22 [2021-10-13 01:13:14,724 INFO L793 eck$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 [2021-10-13 01:13:14,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:14,725 INFO L82 PathProgramCache]: Analyzing trace with hash 382930005, now seen corresponding path program 2 times [2021-10-13 01:13:14,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:14,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393436133] [2021-10-13 01:13:14,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:14,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:14,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:14,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-10-13 01:13:14,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:14,926 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 64 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-13 01:13:14,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:14,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393436133] [2021-10-13 01:13:14,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393436133] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:13:14,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935961824] [2021-10-13 01:13:14,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 01:13:14,928 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:13:14,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:14,933 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:13:14,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-13 01:13:15,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 01:13:15,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 01:13:15,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 01:13:15,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:15,458 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 64 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-13 01:13:15,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935961824] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:13:15,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:13:15,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-10-13 01:13:15,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203797207] [2021-10-13 01:13:15,461 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-13 01:13:15,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:15,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1757801, now seen corresponding path program 3 times [2021-10-13 01:13:15,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:15,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366689566] [2021-10-13 01:13:15,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:15,463 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:15,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 01:13:15,487 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 01:13:15,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 01:13:15,490 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 01:13:15,558 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 01:13:15,558 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 01:13:15,559 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 01:13:15,559 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 01:13:15,559 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-13 01:13:15,559 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:15,559 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 01:13:15,559 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 01:13:15,560 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration7_Loop [2021-10-13 01:13:15,560 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 01:13:15,560 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 01:13:15,561 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:15,563 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:15,566 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:15,568 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:15,631 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 01:13:15,632 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-13 01:13:15,632 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:15,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:15,634 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:15,643 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 01:13:15,644 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 01:13:15,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Waiting until timeout for monitored process [2021-10-13 01:13:15,669 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 01:13:15,670 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret7=0} Honda state: {fibonacci_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 01:13:15,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:15,714 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:15,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:15,716 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:15,718 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 01:13:15,718 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 01:13:15,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Waiting until timeout for monitored process [2021-10-13 01:13:15,744 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 01:13:15,744 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 01:13:15,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:15,781 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:15,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:15,782 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:15,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Waiting until timeout for monitored process [2021-10-13 01:13:15,784 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 01:13:15,784 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 01:13:15,796 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 01:13:15,796 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret8=0} Honda state: {fibonacci_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 01:13:15,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Ended with exit code 0 [2021-10-13 01:13:15,821 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:15,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:15,822 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:15,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Waiting until timeout for monitored process [2021-10-13 01:13:15,824 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 01:13:15,824 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 01:13:15,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Ended with exit code 0 [2021-10-13 01:13:15,865 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:15,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:15,866 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:15,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Waiting until timeout for monitored process [2021-10-13 01:13:15,868 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-13 01:13:15,868 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 01:13:23,514 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-13 01:13:23,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:23,522 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 01:13:23,523 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 01:13:23,523 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 01:13:23,523 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 01:13:23,523 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-13 01:13:23,523 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:23,523 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 01:13:23,523 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 01:13:23,523 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration7_Loop [2021-10-13 01:13:23,523 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 01:13:23,523 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 01:13:23,524 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:23,536 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:23,538 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:23,541 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:23,600 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 01:13:23,600 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-13 01:13:23,600 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:23,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:23,609 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:23,611 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 01:13:23,622 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 01:13:23,622 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 01:13:23,622 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 01:13:23,622 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 01:13:23,622 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 01:13:23,623 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 01:13:23,623 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 01:13:23,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Waiting until timeout for monitored process [2021-10-13 01:13:23,633 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 01:13:23,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:23,681 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:23,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:23,683 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:23,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Waiting until timeout for monitored process [2021-10-13 01:13:23,690 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 01:13:23,701 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 01:13:23,702 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 01:13:23,702 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 01:13:23,702 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 01:13:23,702 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 01:13:23,703 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 01:13:23,703 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 01:13:23,712 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 01:13:23,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:23,757 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:23,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:23,758 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:23,761 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 01:13:23,772 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 01:13:23,772 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 01:13:23,773 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 01:13:23,773 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 01:13:23,773 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 01:13:23,774 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 01:13:23,774 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 01:13:23,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Waiting until timeout for monitored process [2021-10-13 01:13:23,787 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 01:13:23,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:23,831 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:23,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:23,833 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:23,836 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 01:13:23,847 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 01:13:23,848 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 01:13:23,848 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 01:13:23,848 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 01:13:23,848 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 01:13:23,851 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 01:13:23,851 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 01:13:23,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Waiting until timeout for monitored process [2021-10-13 01:13:23,873 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-13 01:13:23,878 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-13 01:13:23,878 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-13 01:13:23,879 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:23,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:23,882 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:23,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Waiting until timeout for monitored process [2021-10-13 01:13:23,885 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-13 01:13:23,885 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-13 01:13:23,886 INFO L513 LassoAnalysis]: Proved termination. [2021-10-13 01:13:23,886 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2021-10-13 01:13:23,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:23,909 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-13 01:13:23,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:23,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:23,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 01:13:24,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:24,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:24,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 01:13:24,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:24,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:24,277 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 [2021-10-13 01:13:24,278 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) [2021-10-13 01:13:24,348 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. [2021-10-13 01:13:24,349 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 [2021-10-13 01:13:24,349 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) [2021-10-13 01:13:24,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2021-10-13 01:13:24,350 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 40 letters. Loop has 4 letters. [2021-10-13 01:13:24,350 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 01:13:24,350 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-13 01:13:24,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:24,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:24,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 01:13:24,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:24,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:24,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:24,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 01:13:24,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:24,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:24,768 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 [2021-10-13 01:13:24,768 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) [2021-10-13 01:13:24,874 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. [2021-10-13 01:13:24,875 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 [2021-10-13 01:13:24,876 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) [2021-10-13 01:13:24,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2021-10-13 01:13:24,876 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 40 letters. Loop has 4 letters. [2021-10-13 01:13:24,877 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 01:13:24,877 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 44 letters. Loop has 4 letters. [2021-10-13 01:13:24,877 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 01:13:24,877 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 40 letters. Loop has 8 letters. [2021-10-13 01:13:24,878 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 01:13:24,878 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 776 states and 1087 transitions. [2021-10-13 01:13:24,892 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-10-13 01:13:24,907 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 776 states to 709 states and 1015 transitions. [2021-10-13 01:13:24,907 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 235 [2021-10-13 01:13:24,908 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 263 [2021-10-13 01:13:24,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 709 states and 1015 transitions. [2021-10-13 01:13:24,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 01:13:24,908 INFO L681 BuchiCegarLoop]: Abstraction has 709 states and 1015 transitions. [2021-10-13 01:13:24,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states and 1015 transitions. [2021-10-13 01:13:24,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 692. [2021-10-13 01:13:24,932 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) [2021-10-13 01:13:24,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 990 transitions. [2021-10-13 01:13:24,940 INFO L704 BuchiCegarLoop]: Abstraction has 692 states and 990 transitions. [2021-10-13 01:13:24,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:13:24,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 01:13:24,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-10-13 01:13:24,942 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) [2021-10-13 01:13:25,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:25,248 INFO L93 Difference]: Finished difference Result 780 states and 1112 transitions. [2021-10-13 01:13:25,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 01:13:25,249 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 780 states and 1112 transitions. [2021-10-13 01:13:25,280 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-10-13 01:13:25,295 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 780 states to 765 states and 1091 transitions. [2021-10-13 01:13:25,295 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 275 [2021-10-13 01:13:25,296 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 275 [2021-10-13 01:13:25,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 765 states and 1091 transitions. [2021-10-13 01:13:25,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 01:13:25,297 INFO L681 BuchiCegarLoop]: Abstraction has 765 states and 1091 transitions. [2021-10-13 01:13:25,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states and 1091 transitions. [2021-10-13 01:13:25,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 747. [2021-10-13 01:13:25,324 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) [2021-10-13 01:13:25,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1059 transitions. [2021-10-13 01:13:25,333 INFO L704 BuchiCegarLoop]: Abstraction has 747 states and 1059 transitions. [2021-10-13 01:13:25,333 INFO L587 BuchiCegarLoop]: Abstraction has 747 states and 1059 transitions. [2021-10-13 01:13:25,333 INFO L425 BuchiCegarLoop]: ======== Iteration 8============ [2021-10-13 01:13:25,333 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 747 states and 1059 transitions. [2021-10-13 01:13:25,341 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-10-13 01:13:25,342 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 01:13:25,342 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 01:13:25,343 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [11, 10, 9, 8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:25,343 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-13 01:13:25,344 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 [2021-10-13 01:13:25,344 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 [2021-10-13 01:13:25,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:25,345 INFO L82 PathProgramCache]: Analyzing trace with hash -38598875, now seen corresponding path program 3 times [2021-10-13 01:13:25,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:25,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228557795] [2021-10-13 01:13:25,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:25,346 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:25,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:25,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-10-13 01:13:25,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:25,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 01:13:25,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:25,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 01:13:25,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:25,558 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 84 proven. 91 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 01:13:25,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:25,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228557795] [2021-10-13 01:13:25,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228557795] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:13:25,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029695906] [2021-10-13 01:13:25,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 01:13:25,560 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:13:25,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:25,565 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:13:25,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-10-13 01:13:25,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-13 01:13:25,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 01:13:25,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 01:13:25,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:26,213 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 106 proven. 19 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-13 01:13:26,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029695906] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:13:26,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:13:26,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 24 [2021-10-13 01:13:26,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140209305] [2021-10-13 01:13:26,215 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-13 01:13:26,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:26,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1757801, now seen corresponding path program 4 times [2021-10-13 01:13:26,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:26,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774065755] [2021-10-13 01:13:26,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:26,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:26,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 01:13:26,226 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 01:13:26,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 01:13:26,228 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 01:13:26,284 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 01:13:26,285 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 01:13:26,285 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 01:13:26,285 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 01:13:26,285 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-13 01:13:26,285 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:26,285 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 01:13:26,286 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 01:13:26,286 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration8_Loop [2021-10-13 01:13:26,286 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 01:13:26,286 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 01:13:26,287 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:26,295 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:26,296 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:26,299 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:26,335 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 01:13:26,335 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-13 01:13:26,335 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:26,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:26,337 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:26,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Waiting until timeout for monitored process [2021-10-13 01:13:26,339 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 01:13:26,339 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 01:13:26,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:26,407 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:26,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:26,408 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:26,418 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-13 01:13:26,419 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 01:13:26,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Waiting until timeout for monitored process [2021-10-13 01:13:34,312 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-13 01:13:34,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:34,316 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 01:13:34,316 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 01:13:34,316 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 01:13:34,316 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 01:13:34,316 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-13 01:13:34,316 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:34,317 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 01:13:34,317 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 01:13:34,317 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration8_Loop [2021-10-13 01:13:34,317 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 01:13:34,317 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 01:13:34,317 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:34,322 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:34,330 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:34,332 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:34,373 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 01:13:34,373 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-13 01:13:34,374 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:34,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:34,380 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:34,381 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 01:13:34,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (53)] Waiting until timeout for monitored process [2021-10-13 01:13:34,389 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 01:13:34,389 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 01:13:34,389 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 01:13:34,389 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 01:13:34,389 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 01:13:34,390 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 01:13:34,390 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 01:13:34,391 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 01:13:34,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (53)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:34,412 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:34,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:34,414 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:34,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Waiting until timeout for monitored process [2021-10-13 01:13:34,429 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 01:13:34,437 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 01:13:34,437 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 01:13:34,437 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 01:13:34,437 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 01:13:34,437 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 01:13:34,438 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 01:13:34,438 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 01:13:34,441 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-13 01:13:34,443 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-10-13 01:13:34,443 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-10-13 01:13:34,443 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:34,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:34,445 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:34,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Waiting until timeout for monitored process [2021-10-13 01:13:34,446 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-13 01:13:34,448 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-13 01:13:34,448 INFO L513 LassoAnalysis]: Proved termination. [2021-10-13 01:13:34,448 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2021-10-13 01:13:34,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:34,473 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-13 01:13:34,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:34,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:34,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 01:13:34,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:34,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:35,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:35,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 01:13:35,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:35,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:35,148 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 [2021-10-13 01:13:35,149 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) [2021-10-13 01:13:35,227 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. [2021-10-13 01:13:35,228 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 [2021-10-13 01:13:35,228 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) [2021-10-13 01:13:35,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2021-10-13 01:13:35,229 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 52 letters. Loop has 4 letters. [2021-10-13 01:13:35,230 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 01:13:35,230 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-13 01:13:35,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:35,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:35,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 01:13:35,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:35,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:35,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 01:13:35,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:35,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:35,857 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 [2021-10-13 01:13:35,857 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) [2021-10-13 01:13:35,973 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. [2021-10-13 01:13:35,974 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 [2021-10-13 01:13:35,974 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) [2021-10-13 01:13:35,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2021-10-13 01:13:35,975 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 52 letters. Loop has 4 letters. [2021-10-13 01:13:35,975 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 01:13:35,975 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-13 01:13:35,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:36,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:36,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 01:13:36,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:36,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:36,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 01:13:36,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:36,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:36,639 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 [2021-10-13 01:13:36,640 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) [2021-10-13 01:13:36,732 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. [2021-10-13 01:13:36,732 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 [2021-10-13 01:13:36,733 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) [2021-10-13 01:13:36,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2021-10-13 01:13:36,734 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 52 letters. Loop has 4 letters. [2021-10-13 01:13:36,735 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 01:13:36,736 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 56 letters. Loop has 4 letters. [2021-10-13 01:13:36,737 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 01:13:36,737 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 52 letters. Loop has 8 letters. [2021-10-13 01:13:36,738 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 01:13:36,738 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1015 states and 1404 transitions. [2021-10-13 01:13:36,755 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-10-13 01:13:36,770 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1015 states to 747 states and 1059 transitions. [2021-10-13 01:13:36,770 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 220 [2021-10-13 01:13:36,772 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 256 [2021-10-13 01:13:36,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 747 states and 1059 transitions. [2021-10-13 01:13:36,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 01:13:36,773 INFO L681 BuchiCegarLoop]: Abstraction has 747 states and 1059 transitions. [2021-10-13 01:13:36,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states and 1059 transitions. [2021-10-13 01:13:36,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 747. [2021-10-13 01:13:36,806 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) [2021-10-13 01:13:36,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1059 transitions. [2021-10-13 01:13:36,812 INFO L704 BuchiCegarLoop]: Abstraction has 747 states and 1059 transitions. [2021-10-13 01:13:36,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:13:36,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 01:13:36,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-10-13 01:13:36,814 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) [2021-10-13 01:13:37,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:37,288 INFO L93 Difference]: Finished difference Result 428 states and 553 transitions. [2021-10-13 01:13:37,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-13 01:13:37,288 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 428 states and 553 transitions. [2021-10-13 01:13:37,295 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-13 01:13:37,301 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 428 states to 368 states and 488 transitions. [2021-10-13 01:13:37,301 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 152 [2021-10-13 01:13:37,302 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 168 [2021-10-13 01:13:37,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 368 states and 488 transitions. [2021-10-13 01:13:37,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 01:13:37,302 INFO L681 BuchiCegarLoop]: Abstraction has 368 states and 488 transitions. [2021-10-13 01:13:37,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states and 488 transitions. [2021-10-13 01:13:37,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 324. [2021-10-13 01:13:37,313 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) [2021-10-13 01:13:37,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 433 transitions. [2021-10-13 01:13:37,316 INFO L704 BuchiCegarLoop]: Abstraction has 324 states and 433 transitions. [2021-10-13 01:13:37,316 INFO L587 BuchiCegarLoop]: Abstraction has 324 states and 433 transitions. [2021-10-13 01:13:37,316 INFO L425 BuchiCegarLoop]: ======== Iteration 9============ [2021-10-13 01:13:37,317 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 324 states and 433 transitions. [2021-10-13 01:13:37,324 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-13 01:13:37,325 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 01:13:37,325 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 01:13:37,327 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [14, 13, 11, 10, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2021-10-13 01:13:37,327 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-13 01:13:37,329 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 [2021-10-13 01:13:37,329 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 [2021-10-13 01:13:37,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:37,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1676674629, now seen corresponding path program 4 times [2021-10-13 01:13:37,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:37,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954360266] [2021-10-13 01:13:37,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:37,331 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:37,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:37,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-10-13 01:13:37,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:37,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 01:13:37,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:37,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 01:13:37,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:37,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 01:13:37,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:37,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-10-13 01:13:37,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:37,651 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 184 proven. 96 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-13 01:13:37,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:37,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954360266] [2021-10-13 01:13:37,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954360266] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:13:37,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448786857] [2021-10-13 01:13:37,653 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 01:13:37,653 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:13:37,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:37,658 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:13:37,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-10-13 01:13:38,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 01:13:38,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 01:13:38,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 01:13:38,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:38,463 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 184 proven. 96 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-13 01:13:38,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448786857] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:13:38,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:13:38,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 22 [2021-10-13 01:13:38,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601319501] [2021-10-13 01:13:38,465 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-13 01:13:38,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:38,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1757801, now seen corresponding path program 5 times [2021-10-13 01:13:38,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:38,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979333906] [2021-10-13 01:13:38,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:38,466 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:38,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 01:13:38,474 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 01:13:38,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 01:13:38,476 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 01:13:38,537 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 01:13:38,537 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 01:13:38,537 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 01:13:38,537 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 01:13:38,537 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-13 01:13:38,537 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:38,537 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 01:13:38,537 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 01:13:38,538 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration9_Loop [2021-10-13 01:13:38,538 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 01:13:38,538 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 01:13:38,538 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:38,540 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:38,542 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:38,550 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:38,590 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 01:13:38,591 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-13 01:13:38,591 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:38,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:38,592 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:38,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (57)] Waiting until timeout for monitored process [2021-10-13 01:13:38,594 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 01:13:38,595 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 01:13:38,605 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 01:13:38,605 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 01:13:38,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (57)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:38,630 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:38,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:38,631 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:38,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (58)] Waiting until timeout for monitored process [2021-10-13 01:13:38,632 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 01:13:38,632 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 01:13:38,642 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 01:13:38,643 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret8=0} Honda state: {fibonacci_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 01:13:38,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (58)] Ended with exit code 0 [2021-10-13 01:13:38,667 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:38,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:38,668 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:38,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (59)] Waiting until timeout for monitored process [2021-10-13 01:13:38,670 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 01:13:38,670 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 01:13:38,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (59)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:38,714 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:38,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:38,715 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:38,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (60)] Waiting until timeout for monitored process [2021-10-13 01:13:38,716 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-13 01:13:38,717 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 01:13:46,696 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-13 01:13:46,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (60)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:46,701 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 01:13:46,701 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 01:13:46,701 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 01:13:46,701 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 01:13:46,701 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-13 01:13:46,701 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:46,702 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 01:13:46,702 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 01:13:46,702 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration9_Loop [2021-10-13 01:13:46,702 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 01:13:46,702 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 01:13:46,703 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:46,712 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:46,714 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:46,716 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 01:13:46,754 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 01:13:46,755 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-13 01:13:46,755 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:46,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:46,758 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:46,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (61)] Waiting until timeout for monitored process [2021-10-13 01:13:46,760 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 01:13:46,769 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 01:13:46,769 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 01:13:46,769 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 01:13:46,769 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 01:13:46,770 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 01:13:46,771 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 01:13:46,771 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 01:13:46,782 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-13 01:13:46,784 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-10-13 01:13:46,784 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-10-13 01:13:46,784 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 01:13:46,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:46,786 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:46,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (62)] Waiting until timeout for monitored process [2021-10-13 01:13:46,787 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-13 01:13:46,787 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-13 01:13:46,788 INFO L513 LassoAnalysis]: Proved termination. [2021-10-13 01:13:46,788 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2021-10-13 01:13:46,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (61)] Ended with exit code 0 [2021-10-13 01:13:46,812 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-13 01:13:46,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:46,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:46,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-13 01:13:46,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:47,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (62)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:47,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:47,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 01:13:47,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:48,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:48,025 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 [2021-10-13 01:13:48,025 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) [2021-10-13 01:13:48,090 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. [2021-10-13 01:13:48,091 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 [2021-10-13 01:13:48,091 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) [2021-10-13 01:13:48,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2021-10-13 01:13:48,092 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 69 letters. Loop has 4 letters. [2021-10-13 01:13:48,092 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 01:13:48,092 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-13 01:13:48,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:48,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:48,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-13 01:13:48,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:49,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:49,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 01:13:49,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:49,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:49,170 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 [2021-10-13 01:13:49,170 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) [2021-10-13 01:13:49,258 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. [2021-10-13 01:13:49,259 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 [2021-10-13 01:13:49,259 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) [2021-10-13 01:13:49,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2021-10-13 01:13:49,260 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 69 letters. Loop has 4 letters. [2021-10-13 01:13:49,260 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 01:13:49,260 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-13 01:13:49,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:49,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:49,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-13 01:13:49,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:50,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:50,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 01:13:50,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:50,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:50,275 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 [2021-10-13 01:13:50,275 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) [2021-10-13 01:13:50,351 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. [2021-10-13 01:13:50,352 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 [2021-10-13 01:13:50,352 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) [2021-10-13 01:13:50,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2021-10-13 01:13:50,352 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 69 letters. Loop has 4 letters. [2021-10-13 01:13:50,353 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 01:13:50,353 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 73 letters. Loop has 4 letters. [2021-10-13 01:13:50,354 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 01:13:50,354 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 69 letters. Loop has 8 letters. [2021-10-13 01:13:50,355 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 01:13:50,355 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 430 states and 563 transitions. [2021-10-13 01:13:50,367 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-13 01:13:50,373 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 430 states to 332 states and 443 transitions. [2021-10-13 01:13:50,373 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 123 [2021-10-13 01:13:50,373 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 135 [2021-10-13 01:13:50,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 332 states and 443 transitions. [2021-10-13 01:13:50,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 01:13:50,374 INFO L681 BuchiCegarLoop]: Abstraction has 332 states and 443 transitions. [2021-10-13 01:13:50,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states and 443 transitions. [2021-10-13 01:13:50,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 324. [2021-10-13 01:13:50,385 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) [2021-10-13 01:13:50,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 433 transitions. [2021-10-13 01:13:50,388 INFO L704 BuchiCegarLoop]: Abstraction has 324 states and 433 transitions. [2021-10-13 01:13:50,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:13:50,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 01:13:50,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-10-13 01:13:50,389 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) [2021-10-13 01:13:50,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:50,826 INFO L93 Difference]: Finished difference Result 407 states and 502 transitions. [2021-10-13 01:13:50,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 01:13:50,827 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 407 states and 502 transitions. [2021-10-13 01:13:50,833 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-13 01:13:50,833 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 407 states to 0 states and 0 transitions. [2021-10-13 01:13:50,833 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-10-13 01:13:50,833 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-10-13 01:13:50,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-10-13 01:13:50,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 01:13:50,833 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 01:13:50,834 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 01:13:50,834 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 01:13:50,834 INFO L425 BuchiCegarLoop]: ======== Iteration 10============ [2021-10-13 01:13:50,834 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-10-13 01:13:50,834 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-13 01:13:50,834 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-10-13 01:13:50,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 13.10 01:13:50 BoogieIcfgContainer [2021-10-13 01:13:50,841 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-10-13 01:13:50,842 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 01:13:50,842 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 01:13:50,842 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 01:13:50,843 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:12:57" (3/4) ... [2021-10-13 01:13:50,846 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 01:13:50,847 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 01:13:50,848 INFO L168 Benchmark]: Toolchain (without parser) took 53793.53 ms. Allocated memory was 92.3 MB in the beginning and 144.7 MB in the end (delta: 52.4 MB). Free memory was 56.5 MB in the beginning and 41.4 MB in the end (delta: 15.1 MB). Peak memory consumption was 67.8 MB. Max. memory is 16.1 GB. [2021-10-13 01:13:50,849 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 92.3 MB. Free memory was 73.1 MB in the beginning and 73.0 MB in the end (delta: 72.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 01:13:50,849 INFO L168 Benchmark]: CACSL2BoogieTranslator took 328.10 ms. Allocated memory is still 92.3 MB. Free memory was 56.3 MB in the beginning and 69.8 MB in the end (delta: -13.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 01:13:50,850 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.60 ms. Allocated memory is still 92.3 MB. Free memory was 69.8 MB in the beginning and 68.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 01:13:50,850 INFO L168 Benchmark]: Boogie Preprocessor took 26.50 ms. Allocated memory is still 92.3 MB. Free memory was 68.5 MB in the beginning and 67.4 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 01:13:50,850 INFO L168 Benchmark]: RCFGBuilder took 414.58 ms. Allocated memory is still 92.3 MB. Free memory was 67.4 MB in the beginning and 58.4 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 01:13:50,851 INFO L168 Benchmark]: BuchiAutomizer took 52955.39 ms. Allocated memory was 92.3 MB in the beginning and 144.7 MB in the end (delta: 52.4 MB). Free memory was 58.4 MB in the beginning and 42.1 MB in the end (delta: 16.3 MB). Peak memory consumption was 70.4 MB. Max. memory is 16.1 GB. [2021-10-13 01:13:50,851 INFO L168 Benchmark]: Witness Printer took 4.83 ms. Allocated memory is still 144.7 MB. Free memory was 42.1 MB in the beginning and 41.4 MB in the end (delta: 768.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 01:13:50,854 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 92.3 MB. Free memory was 73.1 MB in the beginning and 73.0 MB in the end (delta: 72.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 328.10 ms. Allocated memory is still 92.3 MB. Free memory was 56.3 MB in the beginning and 69.8 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 45.60 ms. Allocated memory is still 92.3 MB. Free memory was 69.8 MB in the beginning and 68.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.50 ms. Allocated memory is still 92.3 MB. Free memory was 68.5 MB in the beginning and 67.4 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 414.58 ms. Allocated memory is still 92.3 MB. Free memory was 67.4 MB in the beginning and 58.4 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 52955.39 ms. Allocated memory was 92.3 MB in the beginning and 144.7 MB in the end (delta: 52.4 MB). Free memory was 58.4 MB in the beginning and 42.1 MB in the end (delta: 16.3 MB). Peak memory consumption was 70.4 MB. Max. memory is 16.1 GB. * Witness Printer took 4.83 ms. Allocated memory is still 144.7 MB. Free memory was 42.1 MB in the beginning and 41.4 MB in the end (delta: 768.4 kB). 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 52.8s and 10 iterations. TraceHistogramMax:14. Analysis of lassos took 36.3s. Construction of modules took 1.8s. Büchi inclusion checks took 13.5s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 14. Automata minimization 419.9ms 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, 1858.1ms 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: 42ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 15 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 7 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 26.3s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-10-13 01:13:50,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:51,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-10-13 01:13:51,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-10-13 01:13:51,506 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-10-13 01:13:51,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:51,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:52,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-10-13 01:13:52,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-10-13 01:13:52,506 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3819dab0-a8a5-4f1a-b9da-e53a351b04de/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with exit code 0 Received shutdown request...