./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f63c6229f0a09709710be77b7ac5a08c2c6f5392 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 00:34:07,324 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 00:34:07,327 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 00:34:07,365 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 00:34:07,366 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 00:34:07,368 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 00:34:07,371 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 00:34:07,374 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 00:34:07,377 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 00:34:07,379 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 00:34:07,380 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 00:34:07,382 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 00:34:07,383 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 00:34:07,385 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 00:34:07,387 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 00:34:07,389 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 00:34:07,391 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 00:34:07,392 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 00:34:07,395 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 00:34:07,398 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 00:34:07,401 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 00:34:07,403 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 00:34:07,405 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 00:34:07,407 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 00:34:07,411 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 00:34:07,412 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 00:34:07,413 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 00:34:07,414 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 00:34:07,415 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 00:34:07,417 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 00:34:07,418 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 00:34:07,419 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 00:34:07,421 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 00:34:07,422 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 00:34:07,424 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 00:34:07,426 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 00:34:07,427 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 00:34:07,428 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 00:34:07,429 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 00:34:07,430 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 00:34:07,431 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 00:34:07,433 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-10-11 00:34:07,494 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 00:34:07,494 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 00:34:07,497 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 00:34:07,505 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 00:34:07,505 INFO L138 SettingsManager]: * Use SBE=true [2021-10-11 00:34:07,506 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-10-11 00:34:07,506 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-10-11 00:34:07,507 INFO L138 SettingsManager]: * Use old map elimination=false [2021-10-11 00:34:07,507 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-10-11 00:34:07,508 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-10-11 00:34:07,509 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-10-11 00:34:07,510 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 00:34:07,510 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 00:34:07,510 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-11 00:34:07,511 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 00:34:07,511 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 00:34:07,512 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 00:34:07,512 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-10-11 00:34:07,512 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-10-11 00:34:07,513 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-10-11 00:34:07,513 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 00:34:07,514 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 00:34:07,514 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-10-11 00:34:07,514 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 00:34:07,515 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-10-11 00:34:07,515 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 00:34:07,516 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-11 00:34:07,516 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 00:34:07,517 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-11 00:34:07,519 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 00:34:07,521 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-10-11 00:34:07,521 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_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f63c6229f0a09709710be77b7ac5a08c2c6f5392 [2021-10-11 00:34:07,864 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 00:34:07,915 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 00:34:07,919 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 00:34:07,921 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 00:34:07,922 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 00:34:07,925 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/../../sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c [2021-10-11 00:34:08,008 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/data/94e6e345a/480eb2f1d02f4557ac57a00bffb56dbd/FLAG37ec98ad0 [2021-10-11 00:34:08,585 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 00:34:08,586 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c [2021-10-11 00:34:08,594 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/data/94e6e345a/480eb2f1d02f4557ac57a00bffb56dbd/FLAG37ec98ad0 [2021-10-11 00:34:08,955 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/data/94e6e345a/480eb2f1d02f4557ac57a00bffb56dbd [2021-10-11 00:34:08,957 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 00:34:08,959 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 00:34:08,964 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 00:34:08,965 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 00:34:08,969 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 00:34:08,975 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:34:08" (1/1) ... [2021-10-11 00:34:08,977 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cc5f1bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:34:08, skipping insertion in model container [2021-10-11 00:34:08,977 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:34:08" (1/1) ... [2021-10-11 00:34:08,984 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 00:34:08,998 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 00:34:09,149 WARN L226 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_3834cc00-6473-4020-ad17-50369fd63d18/sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c[947,960] [2021-10-11 00:34:09,150 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:34:09,162 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 00:34:09,217 WARN L226 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_3834cc00-6473-4020-ad17-50369fd63d18/sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c[947,960] [2021-10-11 00:34:09,219 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:34:09,244 INFO L208 MainTranslator]: Completed translation [2021-10-11 00:34:09,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:34:09 WrapperNode [2021-10-11 00:34:09,245 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 00:34:09,247 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 00:34:09,247 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 00:34:09,247 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 00:34:09,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:34:09" (1/1) ... [2021-10-11 00:34:09,266 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:34:09" (1/1) ... [2021-10-11 00:34:09,286 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 00:34:09,287 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 00:34:09,288 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 00:34:09,288 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 00:34:09,299 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:34:09" (1/1) ... [2021-10-11 00:34:09,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:34:09" (1/1) ... [2021-10-11 00:34:09,301 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:34:09" (1/1) ... [2021-10-11 00:34:09,301 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:34:09" (1/1) ... [2021-10-11 00:34:09,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:34:09" (1/1) ... [2021-10-11 00:34:09,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:34:09" (1/1) ... [2021-10-11 00:34:09,310 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:34:09" (1/1) ... [2021-10-11 00:34:09,312 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 00:34:09,314 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 00:34:09,314 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 00:34:09,314 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 00:34:09,316 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:34:09" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:09,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 00:34:09,419 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2021-10-11 00:34:09,420 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2021-10-11 00:34:09,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 00:34:09,420 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2021-10-11 00:34:09,424 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2021-10-11 00:34:09,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 00:34:09,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 00:34:09,679 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 00:34:09,680 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-11 00:34:09,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:34:09 BoogieIcfgContainer [2021-10-11 00:34:09,689 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 00:34:09,700 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-10-11 00:34:09,701 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-10-11 00:34:09,705 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-10-11 00:34:09,706 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-11 00:34:09,706 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 11.10 12:34:08" (1/3) ... [2021-10-11 00:34:09,708 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@17fba277 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 11.10 12:34:09, skipping insertion in model container [2021-10-11 00:34:09,708 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-11 00:34:09,708 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:34:09" (2/3) ... [2021-10-11 00:34:09,709 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@17fba277 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 11.10 12:34:09, skipping insertion in model container [2021-10-11 00:34:09,720 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-11 00:34:09,721 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:34:09" (3/3) ... [2021-10-11 00:34:09,722 INFO L389 chiAutomizerObserver]: Analyzing ICFG fibo_2calls_8-2.c [2021-10-11 00:34:09,794 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-10-11 00:34:09,794 INFO L360 BuchiCegarLoop]: Hoare is false [2021-10-11 00:34:09,794 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-10-11 00:34:09,794 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 00:34:09,794 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 00:34:09,795 INFO L364 BuchiCegarLoop]: Difference is false [2021-10-11 00:34:09,795 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 00:34:09,795 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-10-11 00:34:09,811 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 26 states. [2021-10-11 00:34:09,842 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2021-10-11 00:34:09,842 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-11 00:34:09,842 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-11 00:34:09,851 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-10-11 00:34:09,851 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:34:09,851 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2021-10-11 00:34:09,851 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 26 states. [2021-10-11 00:34:09,856 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2021-10-11 00:34:09,856 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-11 00:34:09,863 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-11 00:34:09,868 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-10-11 00:34:09,868 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:34:09,878 INFO L794 eck$LassoCheckResult]: Stem: 26#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 12#L-1true havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 22#L39true call main_#t~ret11 := fibo1(main_~x~0);< 27#fibo1ENTRYtrue [2021-10-11 00:34:09,878 INFO L796 eck$LassoCheckResult]: Loop: 27#fibo1ENTRYtrue ~n := #in~n; 4#L10true assume !(~n < 1); 10#L12true assume !(1 == ~n); 13#L15true call #t~ret7 := fibo2(~n - 1);< 15#fibo2ENTRYtrue ~n := #in~n; 28#L20true assume !(~n < 1); 20#L22true assume !(1 == ~n); 9#L25true call #t~ret9 := fibo1(~n - 1);< 27#fibo1ENTRYtrue [2021-10-11 00:34:09,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:34:09,886 INFO L82 PathProgramCache]: Analyzing trace with hash 29896, now seen corresponding path program 1 times [2021-10-11 00:34:09,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:34:09,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759070117] [2021-10-11 00:34:09,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:34:10,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:34:10,011 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:34:10,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:34:10,032 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:34:10,056 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-11 00:34:10,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:34:10,059 INFO L82 PathProgramCache]: Analyzing trace with hash 181289832, now seen corresponding path program 1 times [2021-10-11 00:34:10,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:34:10,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735172117] [2021-10-11 00:34:10,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:34:10,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:34:10,071 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:34:10,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:34:10,079 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:34:10,082 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-11 00:34:10,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:34:10,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1313669423, now seen corresponding path program 1 times [2021-10-11 00:34:10,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:34:10,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954082333] [2021-10-11 00:34:10,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:34:10,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:34:10,118 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:34:10,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:34:10,144 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:34:10,152 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-11 00:34:10,386 INFO L210 LassoAnalysis]: Preferences: [2021-10-11 00:34:10,386 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-11 00:34:10,387 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-11 00:34:10,387 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-11 00:34:10,387 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-11 00:34:10,387 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:10,387 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-11 00:34:10,387 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-11 00:34:10,388 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration1_Loop [2021-10-11 00:34:10,388 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-11 00:34:10,388 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2021-10-11 00:34:10,408 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:10,416 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:10,419 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:10,423 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:10,426 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:10,430 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:10,433 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:10,436 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:10,440 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:10,451 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:10,548 INFO L292 LassoAnalysis]: Preprocessing complete. [2021-10-11 00:34:10,549 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:34:10,574 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-11 00:34:10,574 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:10,595 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-11 00:34:10,595 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:34:10,643 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-11 00:34:10,643 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:10,660 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-11 00:34:10,660 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:34:10,706 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-11 00:34:10,706 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:10,733 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-11 00:34:10,733 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#in~n=0} Honda state: {fibo2_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:34:10,780 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-11 00:34:10,780 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:10,793 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-11 00:34:10,793 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret7=0} Honda state: {fibo1_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:34:10,839 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-11 00:34:10,839 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:10,853 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-11 00:34:10,853 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret8=0} Honda state: {fibo1_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:34:10,896 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-11 00:34:10,896 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:10,921 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-11 00:34:10,921 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_~n=0} Honda state: {fibo2_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:34:10,967 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-11 00:34:10,967 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:10,980 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-11 00:34:10,981 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:34:11,024 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-11 00:34:11,024 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:11,036 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-11 00:34:11,037 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret9=0} Honda state: {fibo2_#t~ret9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:34:11,081 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-11 00:34:11,081 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:11,153 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-11 00:34:11,153 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-11 00:34:11,273 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-11 00:34:11,276 INFO L210 LassoAnalysis]: Preferences: [2021-10-11 00:34:11,277 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-11 00:34:11,277 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-11 00:34:11,277 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-11 00:34:11,277 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-11 00:34:11,277 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:11,277 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-11 00:34:11,277 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-11 00:34:11,277 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration1_Loop [2021-10-11 00:34:11,278 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-11 00:34:11,278 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2021-10-11 00:34:11,279 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:11,285 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:11,289 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:11,295 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:11,304 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:11,313 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:11,317 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:11,323 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:11,327 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:11,369 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:11,445 INFO L292 LassoAnalysis]: Preprocessing complete. [2021-10-11 00:34:11,451 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:34:11,464 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2021-10-11 00:34:11,466 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-11 00:34:11,467 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-11 00:34:11,467 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-11 00:34:11,468 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-11 00:34:11,468 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-11 00:34:11,470 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-11 00:34:11,471 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:11,485 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:11,528 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2021-10-11 00:34:11,536 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-11 00:34:11,536 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-11 00:34:11,537 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-11 00:34:11,537 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-11 00:34:11,537 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-11 00:34:11,539 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-11 00:34:11,539 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-11 00:34:11,556 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:34:11,594 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:11,596 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-11 00:34:11,596 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-11 00:34:11,597 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-11 00:34:11,597 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-11 00:34:11,597 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-11 00:34:11,598 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-11 00:34:11,598 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-11 00:34:11,605 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:34:11,656 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2021-10-11 00:34:11,658 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-11 00:34:11,659 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-11 00:34:11,659 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-11 00:34:11,659 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-11 00:34:11,659 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-11 00:34:11,660 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-11 00:34:11,661 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:11,672 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:34:11,720 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2021-10-11 00:34:11,722 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-11 00:34:11,722 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-11 00:34:11,722 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-11 00:34:11,723 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-11 00:34:11,723 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-11 00:34:11,724 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-11 00:34:11,725 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:11,738 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:34:11,785 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2021-10-11 00:34:11,787 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-11 00:34:11,788 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-11 00:34:11,788 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-11 00:34:11,788 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-11 00:34:11,788 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-11 00:34:11,790 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-11 00:34:11,790 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:11,816 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:34:11,878 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2021-10-11 00:34:11,881 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-11 00:34:11,882 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-11 00:34:11,882 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-11 00:34:11,882 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-11 00:34:11,882 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-11 00:34:11,884 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-11 00:34:11,884 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:11,908 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:11,954 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2021-10-11 00:34:11,958 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-11 00:34:11,958 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-11 00:34:11,958 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-11 00:34:11,958 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-11 00:34:11,958 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-11 00:34:11,960 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-11 00:34:11,960 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-11 00:34:11,980 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:34:12,035 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2021-10-11 00:34:12,037 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-11 00:34:12,037 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-11 00:34:12,037 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-11 00:34:12,038 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-11 00:34:12,038 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-11 00:34:12,041 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-11 00:34:12,041 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:12,056 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-11 00:34:12,061 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-10-11 00:34:12,061 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:34:12,071 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-11 00:34:12,071 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-11 00:34:12,072 INFO L510 LassoAnalysis]: Proved termination. [2021-10-11 00:34:12,072 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_#in~n) = 1*fibo1_#in~n Supporting invariants [] Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:12,113 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-11 00:34:12,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:34:12,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:12,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-11 00:34:12,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:34:12,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:12,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-11 00:34:12,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:34:12,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:34:12,373 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 5 loop predicates [2021-10-11 00:34:12,375 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 26 states. Second operand 6 states. [2021-10-11 00:34:12,673 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 26 states.. Second operand 6 states. Result 84 states and 116 transitions. Complement of second has 24 states. [2021-10-11 00:34:12,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 1 stem states 5 non-accepting loop states 1 accepting loop states [2021-10-11 00:34:12,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-11 00:34:12,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 21 transitions. [2021-10-11 00:34:12,690 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 3 letters. Loop has 8 letters. [2021-10-11 00:34:12,691 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-11 00:34:12,692 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 11 letters. Loop has 8 letters. [2021-10-11 00:34:12,692 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-11 00:34:12,692 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 3 letters. Loop has 16 letters. [2021-10-11 00:34:12,693 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-11 00:34:12,694 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 84 states and 116 transitions. [2021-10-11 00:34:12,715 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2021-10-11 00:34:12,737 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 84 states to 61 states and 82 transitions. [2021-10-11 00:34:12,738 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 39 [2021-10-11 00:34:12,739 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 40 [2021-10-11 00:34:12,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 82 transitions. [2021-10-11 00:34:12,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-11 00:34:12,742 INFO L692 BuchiCegarLoop]: Abstraction has 61 states and 82 transitions. [2021-10-11 00:34:12,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states and 82 transitions. [2021-10-11 00:34:12,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2021-10-11 00:34:12,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-10-11 00:34:12,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 72 transitions. [2021-10-11 00:34:12,795 INFO L715 BuchiCegarLoop]: Abstraction has 54 states and 72 transitions. [2021-10-11 00:34:12,795 INFO L595 BuchiCegarLoop]: Abstraction has 54 states and 72 transitions. [2021-10-11 00:34:12,795 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2021-10-11 00:34:12,796 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 54 states and 72 transitions. [2021-10-11 00:34:12,799 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2021-10-11 00:34:12,800 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-11 00:34:12,800 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-11 00:34:12,803 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:34:12,803 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:34:12,804 INFO L794 eck$LassoCheckResult]: Stem: 232#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 226#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 215#L39 call main_#t~ret11 := fibo1(main_~x~0);< 221#fibo1ENTRY ~n := #in~n; 214#L10 assume !(~n < 1); 216#L12 assume !(1 == ~n); 197#L15 call #t~ret7 := fibo2(~n - 1);< 231#fibo2ENTRY ~n := #in~n; 246#L20 assume !(~n < 1); 247#L22 assume !(1 == ~n); 219#L25 call #t~ret9 := fibo1(~n - 1);< 224#fibo1ENTRY ~n := #in~n; 227#L10 assume ~n < 1;#res := 0; 239#fibo1FINAL assume true; 220#fibo1EXIT >#46#return; 210#L25-1 [2021-10-11 00:34:12,804 INFO L796 eck$LassoCheckResult]: Loop: 210#L25-1 call #t~ret10 := fibo1(~n - 2);< 223#fibo1ENTRY ~n := #in~n; 209#L10 assume !(~n < 1); 213#L12 assume !(1 == ~n); 202#L15 call #t~ret7 := fibo2(~n - 1);< 237#fibo2ENTRY ~n := #in~n; 244#L20 assume !(~n < 1); 243#L22 assume !(1 == ~n); 211#L25 call #t~ret9 := fibo1(~n - 1);< 223#fibo1ENTRY ~n := #in~n; 209#L10 assume ~n < 1;#res := 0; 212#fibo1FINAL assume true; 225#fibo1EXIT >#46#return; 210#L25-1 [2021-10-11 00:34:12,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:34:12,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1888024054, now seen corresponding path program 1 times [2021-10-11 00:34:12,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:34:12,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842736272] [2021-10-11 00:34:12,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:34:12,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:12,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-11 00:34:12,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:12,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 00:34:12,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842736272] [2021-10-11 00:34:12,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:34:12,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-11 00:34:12,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186508871] [2021-10-11 00:34:12,936 INFO L799 eck$LassoCheckResult]: stem already infeasible [2021-10-11 00:34:12,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:34:12,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1730504828, now seen corresponding path program 1 times [2021-10-11 00:34:12,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:34:12,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146728473] [2021-10-11 00:34:12,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:34:12,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:12,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-11 00:34:12,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:12,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 00:34:12,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146728473] [2021-10-11 00:34:12,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:34:12,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-11 00:34:12,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203531236] [2021-10-11 00:34:12,988 INFO L811 eck$LassoCheckResult]: loop already infeasible [2021-10-11 00:34:12,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:34:12,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 00:34:12,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-11 00:34:12,993 INFO L87 Difference]: Start difference. First operand 54 states and 72 transitions. cyclomatic complexity: 20 Second operand 6 states. [2021-10-11 00:34:13,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:34:13,100 INFO L93 Difference]: Finished difference Result 68 states and 88 transitions. [2021-10-11 00:34:13,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 00:34:13,102 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 68 states and 88 transitions. [2021-10-11 00:34:13,114 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2021-10-11 00:34:13,118 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 68 states to 66 states and 86 transitions. [2021-10-11 00:34:13,119 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 46 [2021-10-11 00:34:13,122 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 46 [2021-10-11 00:34:13,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 86 transitions. [2021-10-11 00:34:13,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-11 00:34:13,123 INFO L692 BuchiCegarLoop]: Abstraction has 66 states and 86 transitions. [2021-10-11 00:34:13,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states and 86 transitions. [2021-10-11 00:34:13,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2021-10-11 00:34:13,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-10-11 00:34:13,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2021-10-11 00:34:13,136 INFO L715 BuchiCegarLoop]: Abstraction has 58 states and 76 transitions. [2021-10-11 00:34:13,137 INFO L595 BuchiCegarLoop]: Abstraction has 58 states and 76 transitions. [2021-10-11 00:34:13,137 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2021-10-11 00:34:13,137 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 58 states and 76 transitions. [2021-10-11 00:34:13,138 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2021-10-11 00:34:13,138 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-11 00:34:13,138 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-11 00:34:13,139 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:34:13,139 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:34:13,139 INFO L794 eck$LassoCheckResult]: Stem: 373#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 372#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 353#L39 call main_#t~ret11 := fibo1(main_~x~0);< 362#fibo1ENTRY ~n := #in~n; 352#L10 assume !(~n < 1); 354#L12 assume !(1 == ~n); 343#L15 call #t~ret7 := fibo2(~n - 1);< 376#fibo2ENTRY ~n := #in~n; 397#L20 assume !(~n < 1); 398#L22 assume !(1 == ~n); 350#L25 call #t~ret9 := fibo1(~n - 1);< 369#fibo1ENTRY ~n := #in~n; 349#L10 assume !(~n < 1); 351#L12 assume 1 == ~n;#res := 1; 370#fibo1FINAL assume true; 363#fibo1EXIT >#46#return; 364#L25-1 [2021-10-11 00:34:13,140 INFO L796 eck$LassoCheckResult]: Loop: 364#L25-1 call #t~ret10 := fibo1(~n - 2);< 368#fibo1ENTRY ~n := #in~n; 387#L10 assume !(~n < 1); 388#L12 assume !(1 == ~n); 347#L15 call #t~ret7 := fibo2(~n - 1);< 386#fibo2ENTRY ~n := #in~n; 393#L20 assume !(~n < 1); 391#L22 assume !(1 == ~n); 366#L25 call #t~ret9 := fibo1(~n - 1);< 368#fibo1ENTRY ~n := #in~n; 387#L10 assume !(~n < 1); 388#L12 assume 1 == ~n;#res := 1; 367#fibo1FINAL assume true; 371#fibo1EXIT >#46#return; 364#L25-1 [2021-10-11 00:34:13,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:34:13,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1600771562, now seen corresponding path program 1 times [2021-10-11 00:34:13,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:34:13,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915086606] [2021-10-11 00:34:13,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:34:13,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:13,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-11 00:34:13,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:13,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:34:13,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915086606] [2021-10-11 00:34:13,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252991602] [2021-10-11 00:34:13,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:34:13,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:13,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-11 00:34:13,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:34:13,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:34:13,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:34:13,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-10-11 00:34:13,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742455659] [2021-10-11 00:34:13,455 INFO L799 eck$LassoCheckResult]: stem already infeasible [2021-10-11 00:34:13,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:34:13,456 INFO L82 PathProgramCache]: Analyzing trace with hash 2106067024, now seen corresponding path program 1 times [2021-10-11 00:34:13,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:34:13,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021098628] [2021-10-11 00:34:13,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:34:13,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:34:13,465 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:34:13,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:34:13,471 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:34:13,474 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-11 00:34:13,718 INFO L210 LassoAnalysis]: Preferences: [2021-10-11 00:34:13,718 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-11 00:34:13,718 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-11 00:34:13,718 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-11 00:34:13,718 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-11 00:34:13,718 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:13,719 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-11 00:34:13,719 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-11 00:34:13,719 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration3_Loop [2021-10-11 00:34:13,719 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-11 00:34:13,719 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2021-10-11 00:34:13,721 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:13,724 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:13,727 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:13,733 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:13,739 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:13,751 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:13,754 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:13,764 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:13,768 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:13,858 INFO L292 LassoAnalysis]: Preprocessing complete. [2021-10-11 00:34:13,858 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:34:13,865 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-11 00:34:13,865 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:13,877 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-11 00:34:13,877 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret7=0} Honda state: {fibo1_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:34:13,914 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-11 00:34:13,914 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:13,949 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-11 00:34:13,949 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret8=0} Honda state: {fibo1_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:13,984 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-11 00:34:13,984 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-11 00:34:13,987 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-11 00:34:13,987 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#in~n=0} Honda state: {fibo1_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:14,010 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-11 00:34:14,010 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-11 00:34:14,013 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-11 00:34:14,013 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:34:14,059 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-11 00:34:14,059 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:14,091 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-11 00:34:14,091 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-11 00:34:15,309 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-11 00:34:15,311 INFO L210 LassoAnalysis]: Preferences: [2021-10-11 00:34:15,311 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-11 00:34:15,311 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-11 00:34:15,312 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-11 00:34:15,312 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-11 00:34:15,312 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:15,312 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-11 00:34:15,312 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-11 00:34:15,312 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration3_Loop [2021-10-11 00:34:15,312 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-11 00:34:15,312 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2021-10-11 00:34:15,313 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:15,319 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:15,323 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:15,327 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:15,341 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:15,345 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:15,348 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:15,366 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:15,370 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:15,491 INFO L292 LassoAnalysis]: Preprocessing complete. [2021-10-11 00:34:15,492 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:34:15,500 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2021-10-11 00:34:15,502 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-11 00:34:15,502 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-11 00:34:15,502 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-11 00:34:15,502 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-11 00:34:15,503 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-11 00:34:15,505 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-11 00:34:15,505 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-11 00:34:15,510 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:15,536 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2021-10-11 00:34:15,537 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-11 00:34:15,537 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-11 00:34:15,537 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-11 00:34:15,537 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-11 00:34:15,538 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-11 00:34:15,541 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-11 00:34:15,541 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-11 00:34:15,548 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:15,576 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2021-10-11 00:34:15,578 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-11 00:34:15,578 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-11 00:34:15,578 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-11 00:34:15,578 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-11 00:34:15,578 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-11 00:34:15,582 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-11 00:34:15,582 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-11 00:34:15,583 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:15,609 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2021-10-11 00:34:15,611 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-11 00:34:15,611 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-11 00:34:15,611 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-11 00:34:15,611 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-11 00:34:15,611 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-11 00:34:15,614 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-11 00:34:15,614 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-11 00:34:15,624 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-11 00:34:15,629 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-11 00:34:15,630 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:15,648 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-11 00:34:15,648 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-11 00:34:15,648 INFO L510 LassoAnalysis]: Proved termination. [2021-10-11 00:34:15,648 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_~n) = 1*fibo2_~n Supporting invariants [] [2021-10-11 00:34:15,679 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-11 00:34:15,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:34:15,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:15,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-11 00:34:15,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:34:15,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:15,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-11 00:34:15,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:34:16,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:34:16,101 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 8 loop predicates [2021-10-11 00:34:16,101 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 58 states and 76 transitions. cyclomatic complexity: 20 Second operand 10 states. [2021-10-11 00:34:16,843 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 58 states and 76 transitions. cyclomatic complexity: 20. Second operand 10 states. Result 191 states and 263 transitions. Complement of second has 40 states. [2021-10-11 00:34:16,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 2 stem states 9 non-accepting loop states 1 accepting loop states [2021-10-11 00:34:16,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-11 00:34:16,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 73 transitions. [2021-10-11 00:34:16,851 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 16 letters. Loop has 14 letters. [2021-10-11 00:34:16,852 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-11 00:34:16,852 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 30 letters. Loop has 14 letters. [2021-10-11 00:34:16,855 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-11 00:34:16,856 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 16 letters. Loop has 28 letters. [2021-10-11 00:34:16,859 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-11 00:34:16,860 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 191 states and 263 transitions. [2021-10-11 00:34:16,877 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2021-10-11 00:34:16,882 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 191 states to 169 states and 237 transitions. [2021-10-11 00:34:16,882 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 103 [2021-10-11 00:34:16,883 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 106 [2021-10-11 00:34:16,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 169 states and 237 transitions. [2021-10-11 00:34:16,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-11 00:34:16,886 INFO L692 BuchiCegarLoop]: Abstraction has 169 states and 237 transitions. [2021-10-11 00:34:16,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states and 237 transitions. [2021-10-11 00:34:16,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 152. [2021-10-11 00:34:16,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2021-10-11 00:34:16,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 206 transitions. [2021-10-11 00:34:16,911 INFO L715 BuchiCegarLoop]: Abstraction has 152 states and 206 transitions. [2021-10-11 00:34:16,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:34:16,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-11 00:34:16,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-11 00:34:16,912 INFO L87 Difference]: Start difference. First operand 152 states and 206 transitions. Second operand 10 states. [2021-10-11 00:34:17,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:34:17,141 INFO L93 Difference]: Finished difference Result 183 states and 244 transitions. [2021-10-11 00:34:17,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-11 00:34:17,142 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 183 states and 244 transitions. [2021-10-11 00:34:17,153 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2021-10-11 00:34:17,169 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 183 states to 180 states and 240 transitions. [2021-10-11 00:34:17,171 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 117 [2021-10-11 00:34:17,174 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 117 [2021-10-11 00:34:17,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 180 states and 240 transitions. [2021-10-11 00:34:17,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-11 00:34:17,177 INFO L692 BuchiCegarLoop]: Abstraction has 180 states and 240 transitions. [2021-10-11 00:34:17,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states and 240 transitions. [2021-10-11 00:34:17,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 167. [2021-10-11 00:34:17,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2021-10-11 00:34:17,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 225 transitions. [2021-10-11 00:34:17,214 INFO L715 BuchiCegarLoop]: Abstraction has 167 states and 225 transitions. [2021-10-11 00:34:17,214 INFO L595 BuchiCegarLoop]: Abstraction has 167 states and 225 transitions. [2021-10-11 00:34:17,214 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2021-10-11 00:34:17,214 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 167 states and 225 transitions. [2021-10-11 00:34:17,222 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2021-10-11 00:34:17,223 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-11 00:34:17,223 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-11 00:34:17,234 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [8, 7, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-11 00:34:17,235 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2021-10-11 00:34:17,236 INFO L794 eck$LassoCheckResult]: Stem: 1216#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 1211#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 1190#L39 call main_#t~ret11 := fibo1(main_~x~0);< 1191#fibo1ENTRY ~n := #in~n; 1256#L10 assume !(~n < 1); 1204#L12 assume !(1 == ~n); 1157#L15 call #t~ret7 := fibo2(~n - 1);< 1213#fibo2ENTRY ~n := #in~n; 1218#L20 assume !(~n < 1); 1173#L22 assume !(1 == ~n); 1174#L25 call #t~ret9 := fibo1(~n - 1);< 1203#fibo1ENTRY ~n := #in~n; 1180#L10 assume !(~n < 1); 1182#L12 assume !(1 == ~n); 1202#L15 call #t~ret7 := fibo2(~n - 1);< 1258#fibo2ENTRY ~n := #in~n; 1260#L20 assume !(~n < 1); 1261#L22 assume !(1 == ~n); 1181#L25 call #t~ret9 := fibo1(~n - 1);< 1203#fibo1ENTRY ~n := #in~n; 1180#L10 assume !(~n < 1); 1182#L12 assume !(1 == ~n); 1202#L15 call #t~ret7 := fibo2(~n - 1);< 1258#fibo2ENTRY ~n := #in~n; 1260#L20 assume ~n < 1;#res := 0; 1259#fibo2FINAL assume true; 1257#fibo2EXIT >#50#return; 1201#L15-1 call #t~ret8 := fibo2(~n - 2);< 1220#fibo2ENTRY ~n := #in~n; 1315#L20 assume !(~n < 1); 1314#L22 assume !(1 == ~n); 1181#L25 call #t~ret9 := fibo1(~n - 1);< 1203#fibo1ENTRY ~n := #in~n; 1255#L10 assume !(~n < 1); 1262#L12 assume 1 == ~n;#res := 1; 1263#fibo1FINAL assume true; 1250#fibo1EXIT >#46#return; 1245#L25-1 call #t~ret10 := fibo1(~n - 2);< 1210#fibo1ENTRY ~n := #in~n; 1248#L10 assume !(~n < 1); 1246#L12 assume !(1 == ~n); 1209#L15 call #t~ret7 := fibo2(~n - 1);< 1243#fibo2ENTRY ~n := #in~n; 1240#L20 assume ~n < 1;#res := 0; 1241#fibo2FINAL assume true; 1247#fibo2EXIT >#50#return; 1208#L15-1 call #t~ret8 := fibo2(~n - 2);< 1243#fibo2ENTRY ~n := #in~n; 1240#L20 assume !(~n < 1); 1236#L22 assume 1 == ~n;#res := 1; 1237#fibo2FINAL assume true; 1304#fibo2EXIT >#52#return; 1305#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 1317#fibo1FINAL assume true; 1316#fibo1EXIT >#48#return; 1186#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 1309#fibo2FINAL assume true; 1307#fibo2EXIT >#52#return; 1305#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 1317#fibo1FINAL assume true; 1316#fibo1EXIT >#46#return; 1184#L25-1 call #t~ret10 := fibo1(~n - 2);< 1298#fibo1ENTRY ~n := #in~n; 1296#L10 assume !(~n < 1); 1294#L12 assume !(1 == ~n); 1169#L15 call #t~ret7 := fibo2(~n - 1);< 1212#fibo2ENTRY ~n := #in~n; 1217#L20 assume ~n < 1;#res := 0; 1171#fibo2FINAL assume true; 1308#fibo2EXIT >#50#return; 1168#L15-1 call #t~ret8 := fibo2(~n - 2);< 1212#fibo2ENTRY ~n := #in~n; 1217#L20 assume ~n < 1;#res := 0; 1171#fibo2FINAL assume true; 1308#fibo2EXIT >#52#return; 1305#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 1317#fibo1FINAL assume true; 1316#fibo1EXIT >#48#return; 1186#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 1309#fibo2FINAL assume true; 1307#fibo2EXIT >#50#return; 1168#L15-1 [2021-10-11 00:34:17,236 INFO L796 eck$LassoCheckResult]: Loop: 1168#L15-1 call #t~ret8 := fibo2(~n - 2);< 1212#fibo2ENTRY ~n := #in~n; 1217#L20 assume !(~n < 1); 1167#L22 assume !(1 == ~n); 1172#L25 call #t~ret9 := fibo1(~n - 1);< 1298#fibo1ENTRY ~n := #in~n; 1296#L10 assume !(~n < 1); 1294#L12 assume !(1 == ~n); 1169#L15 call #t~ret7 := fibo2(~n - 1);< 1212#fibo2ENTRY ~n := #in~n; 1217#L20 assume !(~n < 1); 1167#L22 assume !(1 == ~n); 1172#L25 call #t~ret9 := fibo1(~n - 1);< 1298#fibo1ENTRY ~n := #in~n; 1296#L10 assume !(~n < 1); 1294#L12 assume !(1 == ~n); 1169#L15 call #t~ret7 := fibo2(~n - 1);< 1212#fibo2ENTRY ~n := #in~n; 1217#L20 assume ~n < 1;#res := 0; 1171#fibo2FINAL assume true; 1308#fibo2EXIT >#50#return; 1168#L15-1 call #t~ret8 := fibo2(~n - 2);< 1212#fibo2ENTRY ~n := #in~n; 1217#L20 assume ~n < 1;#res := 0; 1171#fibo2FINAL assume true; 1308#fibo2EXIT >#52#return; 1305#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 1317#fibo1FINAL assume true; 1316#fibo1EXIT >#46#return; 1184#L25-1 call #t~ret10 := fibo1(~n - 2);< 1298#fibo1ENTRY ~n := #in~n; 1296#L10 assume !(~n < 1); 1294#L12 assume !(1 == ~n); 1169#L15 call #t~ret7 := fibo2(~n - 1);< 1212#fibo2ENTRY ~n := #in~n; 1217#L20 assume ~n < 1;#res := 0; 1171#fibo2FINAL assume true; 1308#fibo2EXIT >#50#return; 1168#L15-1 call #t~ret8 := fibo2(~n - 2);< 1212#fibo2ENTRY ~n := #in~n; 1217#L20 assume ~n < 1;#res := 0; 1171#fibo2FINAL assume true; 1308#fibo2EXIT >#52#return; 1305#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 1317#fibo1FINAL assume true; 1316#fibo1EXIT >#48#return; 1186#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 1309#fibo2FINAL assume true; 1307#fibo2EXIT >#50#return; 1168#L15-1 [2021-10-11 00:34:17,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:34:17,237 INFO L82 PathProgramCache]: Analyzing trace with hash 376035563, now seen corresponding path program 1 times [2021-10-11 00:34:17,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:34:17,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161147855] [2021-10-11 00:34:17,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:34:17,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:17,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-11 00:34:17,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:17,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-11 00:34:17,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:17,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-11 00:34:17,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:17,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-11 00:34:17,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:17,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-11 00:34:17,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:17,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-11 00:34:17,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:17,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-11 00:34:17,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:17,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-11 00:34:17,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:17,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-10-11 00:34:17,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:17,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-11 00:34:17,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:17,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-11 00:34:17,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:17,571 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-10-11 00:34:17,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161147855] [2021-10-11 00:34:17,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93486176] [2021-10-11 00:34:17,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:34:17,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:17,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-11 00:34:17,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:34:17,995 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 17 proven. 91 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-10-11 00:34:17,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:34:17,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13] total 17 [2021-10-11 00:34:17,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180312375] [2021-10-11 00:34:17,997 INFO L799 eck$LassoCheckResult]: stem already infeasible [2021-10-11 00:34:17,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:34:17,998 INFO L82 PathProgramCache]: Analyzing trace with hash 36254641, now seen corresponding path program 1 times [2021-10-11 00:34:17,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:34:17,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361372299] [2021-10-11 00:34:17,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:34:18,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:18,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-11 00:34:18,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:18,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-11 00:34:18,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:18,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-11 00:34:18,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:18,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-11 00:34:18,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:18,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-11 00:34:18,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:18,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-11 00:34:18,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:18,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-11 00:34:18,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:18,173 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-10-11 00:34:18,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361372299] [2021-10-11 00:34:18,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451759349] [2021-10-11 00:34:18,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:34:18,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:18,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-11 00:34:18,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:34:18,436 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-11 00:34:18,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:34:18,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 12 [2021-10-11 00:34:18,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511464725] [2021-10-11 00:34:18,440 INFO L811 eck$LassoCheckResult]: loop already infeasible [2021-10-11 00:34:18,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:34:18,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-11 00:34:18,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-10-11 00:34:18,441 INFO L87 Difference]: Start difference. First operand 167 states and 225 transitions. cyclomatic complexity: 63 Second operand 12 states. [2021-10-11 00:34:18,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:34:18,799 INFO L93 Difference]: Finished difference Result 223 states and 293 transitions. [2021-10-11 00:34:18,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-11 00:34:18,801 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 223 states and 293 transitions. [2021-10-11 00:34:18,805 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2021-10-11 00:34:18,811 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 223 states to 200 states and 262 transitions. [2021-10-11 00:34:18,811 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 134 [2021-10-11 00:34:18,812 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 134 [2021-10-11 00:34:18,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 200 states and 262 transitions. [2021-10-11 00:34:18,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-11 00:34:18,813 INFO L692 BuchiCegarLoop]: Abstraction has 200 states and 262 transitions. [2021-10-11 00:34:18,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states and 262 transitions. [2021-10-11 00:34:18,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 184. [2021-10-11 00:34:18,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2021-10-11 00:34:18,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 238 transitions. [2021-10-11 00:34:18,831 INFO L715 BuchiCegarLoop]: Abstraction has 184 states and 238 transitions. [2021-10-11 00:34:18,831 INFO L595 BuchiCegarLoop]: Abstraction has 184 states and 238 transitions. [2021-10-11 00:34:18,831 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2021-10-11 00:34:18,831 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 184 states and 238 transitions. [2021-10-11 00:34:18,835 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2021-10-11 00:34:18,835 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-11 00:34:18,835 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-11 00:34:18,837 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:34:18,837 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2021-10-11 00:34:18,838 INFO L794 eck$LassoCheckResult]: Stem: 2328#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 2320#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 2299#L39 call main_#t~ret11 := fibo1(main_~x~0);< 2300#fibo1ENTRY ~n := #in~n; 2363#L10 assume !(~n < 1); 2319#L12 assume !(1 == ~n); 2309#L15 call #t~ret7 := fibo2(~n - 1);< 2323#fibo2ENTRY ~n := #in~n; 2330#L20 assume !(~n < 1); 2337#L22 assume !(1 == ~n); 2308#L25 call #t~ret9 := fibo1(~n - 1);< 2310#fibo1ENTRY ~n := #in~n; 2349#L10 assume !(~n < 1); 2347#L12 assume !(1 == ~n); 2333#L15 call #t~ret7 := fibo2(~n - 1);< 2343#fibo2ENTRY ~n := #in~n; 2366#L20 assume !(~n < 1); 2365#L22 assume !(1 == ~n); 2282#L25 call #t~ret9 := fibo1(~n - 1);< 2310#fibo1ENTRY ~n := #in~n; 2352#L10 assume !(~n < 1); 2377#L12 assume 1 == ~n;#res := 1; 2378#fibo1FINAL assume true; 2435#fibo1EXIT >#46#return; 2436#L25-1 call #t~ret10 := fibo1(~n - 2);< 2440#fibo1ENTRY ~n := #in~n; 2442#L10 assume ~n < 1;#res := 0; 2441#fibo1FINAL assume true; 2439#fibo1EXIT >#48#return; 2434#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 2433#fibo2FINAL assume true; 2386#fibo2EXIT >#50#return; 2264#L15-1 [2021-10-11 00:34:18,838 INFO L796 eck$LassoCheckResult]: Loop: 2264#L15-1 call #t~ret8 := fibo2(~n - 2);< 2334#fibo2ENTRY ~n := #in~n; 2409#L20 assume !(~n < 1); 2408#L22 assume !(1 == ~n); 2393#L25 call #t~ret9 := fibo1(~n - 1);< 2403#fibo1ENTRY ~n := #in~n; 2405#L10 assume !(~n < 1); 2397#L12 assume !(1 == ~n); 2265#L15 call #t~ret7 := fibo2(~n - 1);< 2334#fibo2ENTRY ~n := #in~n; 2409#L20 assume !(~n < 1); 2408#L22 assume !(1 == ~n); 2393#L25 call #t~ret9 := fibo1(~n - 1);< 2403#fibo1ENTRY ~n := #in~n; 2405#L10 assume !(~n < 1); 2397#L12 assume !(1 == ~n); 2265#L15 call #t~ret7 := fibo2(~n - 1);< 2334#fibo2ENTRY ~n := #in~n; 2409#L20 assume !(~n < 1); 2408#L22 assume 1 == ~n;#res := 1; 2266#fibo2FINAL assume true; 2283#fibo2EXIT >#50#return; 2264#L15-1 call #t~ret8 := fibo2(~n - 2);< 2334#fibo2ENTRY ~n := #in~n; 2409#L20 assume ~n < 1;#res := 0; 2410#fibo2FINAL assume true; 2412#fibo2EXIT >#52#return; 2387#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 2411#fibo1FINAL assume true; 2401#fibo1EXIT >#46#return; 2391#L25-1 call #t~ret10 := fibo1(~n - 2);< 2403#fibo1ENTRY ~n := #in~n; 2405#L10 assume !(~n < 1); 2397#L12 assume !(1 == ~n); 2265#L15 call #t~ret7 := fibo2(~n - 1);< 2334#fibo2ENTRY ~n := #in~n; 2409#L20 assume !(~n < 1); 2408#L22 assume 1 == ~n;#res := 1; 2266#fibo2FINAL assume true; 2283#fibo2EXIT >#50#return; 2264#L15-1 call #t~ret8 := fibo2(~n - 2);< 2334#fibo2ENTRY ~n := #in~n; 2409#L20 assume ~n < 1;#res := 0; 2410#fibo2FINAL assume true; 2412#fibo2EXIT >#52#return; 2387#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 2411#fibo1FINAL assume true; 2401#fibo1EXIT >#48#return; 2396#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 2394#fibo2FINAL assume true; 2390#fibo2EXIT >#50#return; 2264#L15-1 [2021-10-11 00:34:18,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:34:18,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1036448488, now seen corresponding path program 1 times [2021-10-11 00:34:18,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:34:18,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580277679] [2021-10-11 00:34:18,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:34:18,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:18,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-11 00:34:18,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:18,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-11 00:34:18,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:19,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-11 00:34:19,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:19,033 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 00:34:19,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580277679] [2021-10-11 00:34:19,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970707511] [2021-10-11 00:34:19,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:34:19,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:19,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-11 00:34:19,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:34:19,226 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 00:34:19,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:34:19,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 15 [2021-10-11 00:34:19,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898509497] [2021-10-11 00:34:19,227 INFO L799 eck$LassoCheckResult]: stem already infeasible [2021-10-11 00:34:19,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:34:19,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1445694181, now seen corresponding path program 1 times [2021-10-11 00:34:19,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:34:19,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049896342] [2021-10-11 00:34:19,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:34:19,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:19,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-11 00:34:19,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:19,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-11 00:34:19,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:19,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-11 00:34:19,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:19,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-11 00:34:19,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:19,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-10-11 00:34:19,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:19,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-11 00:34:19,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:19,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-11 00:34:19,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:19,435 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-11 00:34:19,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049896342] [2021-10-11 00:34:19,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939605282] [2021-10-11 00:34:19,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:34:19,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:19,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-11 00:34:19,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:34:19,666 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-11 00:34:19,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:34:19,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-10-11 00:34:19,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305747140] [2021-10-11 00:34:19,668 INFO L811 eck$LassoCheckResult]: loop already infeasible [2021-10-11 00:34:19,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:34:19,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-11 00:34:19,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-10-11 00:34:19,671 INFO L87 Difference]: Start difference. First operand 184 states and 238 transitions. cyclomatic complexity: 59 Second operand 16 states. [2021-10-11 00:34:20,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:34:20,101 INFO L93 Difference]: Finished difference Result 206 states and 268 transitions. [2021-10-11 00:34:20,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-11 00:34:20,102 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 206 states and 268 transitions. [2021-10-11 00:34:20,107 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2021-10-11 00:34:20,112 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 206 states to 203 states and 264 transitions. [2021-10-11 00:34:20,112 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 133 [2021-10-11 00:34:20,113 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 133 [2021-10-11 00:34:20,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 203 states and 264 transitions. [2021-10-11 00:34:20,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-11 00:34:20,114 INFO L692 BuchiCegarLoop]: Abstraction has 203 states and 264 transitions. [2021-10-11 00:34:20,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states and 264 transitions. [2021-10-11 00:34:20,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 194. [2021-10-11 00:34:20,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2021-10-11 00:34:20,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 249 transitions. [2021-10-11 00:34:20,136 INFO L715 BuchiCegarLoop]: Abstraction has 194 states and 249 transitions. [2021-10-11 00:34:20,136 INFO L595 BuchiCegarLoop]: Abstraction has 194 states and 249 transitions. [2021-10-11 00:34:20,136 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2021-10-11 00:34:20,136 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 194 states and 249 transitions. [2021-10-11 00:34:20,139 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2021-10-11 00:34:20,139 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-11 00:34:20,139 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-11 00:34:20,147 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:34:20,148 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2021-10-11 00:34:20,148 INFO L794 eck$LassoCheckResult]: Stem: 3112#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 3111#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 3072#L39 call main_#t~ret11 := fibo1(main_~x~0);< 3089#fibo1ENTRY ~n := #in~n; 3071#L10 assume !(~n < 1); 3073#L12 assume !(1 == ~n); 3082#L15 call #t~ret7 := fibo2(~n - 1);< 3117#fibo2ENTRY ~n := #in~n; 3119#L20 assume !(~n < 1); 3081#L22 assume !(1 == ~n); 3083#L25 call #t~ret9 := fibo1(~n - 1);< 3103#fibo1ENTRY ~n := #in~n; 3178#L10 assume !(~n < 1); 3176#L12 assume !(1 == ~n); 3087#L15 call #t~ret7 := fibo2(~n - 1);< 3135#fibo2ENTRY ~n := #in~n; 3173#L20 assume !(~n < 1); 3170#L22 assume !(1 == ~n); 3124#L25 call #t~ret9 := fibo1(~n - 1);< 3149#fibo1ENTRY ~n := #in~n; 3152#L10 assume !(~n < 1); 3151#L12 assume !(1 == ~n); 3086#L15 call #t~ret7 := fibo2(~n - 1);< 3135#fibo2ENTRY ~n := #in~n; 3173#L20 assume !(~n < 1); 3170#L22 assume !(1 == ~n); 3124#L25 call #t~ret9 := fibo1(~n - 1);< 3149#fibo1ENTRY ~n := #in~n; 3154#L10 assume !(~n < 1); 3171#L12 assume 1 == ~n;#res := 1; 3172#fibo1FINAL assume true; 3230#fibo1EXIT >#46#return; 3227#L25-1 call #t~ret10 := fibo1(~n - 2);< 3228#fibo1ENTRY ~n := #in~n; 3231#L10 assume ~n < 1;#res := 0; 3229#fibo1FINAL assume true; 3226#fibo1EXIT >#48#return; 3225#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 3224#fibo2FINAL assume true; 3182#fibo2EXIT >#50#return; 3184#L15-1 [2021-10-11 00:34:20,150 INFO L796 eck$LassoCheckResult]: Loop: 3184#L15-1 call #t~ret8 := fibo2(~n - 2);< 3123#fibo2ENTRY ~n := #in~n; 3214#L20 assume !(~n < 1); 3210#L22 assume !(1 == ~n); 3192#L25 call #t~ret9 := fibo1(~n - 1);< 3203#fibo1ENTRY ~n := #in~n; 3206#L10 assume !(~n < 1); 3204#L12 assume !(1 == ~n); 3189#L15 call #t~ret7 := fibo2(~n - 1);< 3123#fibo2ENTRY ~n := #in~n; 3214#L20 assume !(~n < 1); 3210#L22 assume !(1 == ~n); 3192#L25 call #t~ret9 := fibo1(~n - 1);< 3203#fibo1ENTRY ~n := #in~n; 3206#L10 assume !(~n < 1); 3204#L12 assume !(1 == ~n); 3189#L15 call #t~ret7 := fibo2(~n - 1);< 3123#fibo2ENTRY ~n := #in~n; 3214#L20 assume !(~n < 1); 3210#L22 assume 1 == ~n;#res := 1; 3209#fibo2FINAL assume true; 3196#fibo2EXIT >#50#return; 3184#L15-1 call #t~ret8 := fibo2(~n - 2);< 3123#fibo2ENTRY ~n := #in~n; 3214#L20 assume ~n < 1;#res := 0; 3215#fibo2FINAL assume true; 3220#fibo2EXIT >#52#return; 3183#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 3217#fibo1FINAL assume true; 3201#fibo1EXIT >#46#return; 3193#L25-1 call #t~ret10 := fibo1(~n - 2);< 3203#fibo1ENTRY ~n := #in~n; 3206#L10 assume !(~n < 1); 3204#L12 assume !(1 == ~n); 3189#L15 call #t~ret7 := fibo2(~n - 1);< 3123#fibo2ENTRY ~n := #in~n; 3214#L20 assume !(~n < 1); 3210#L22 assume 1 == ~n;#res := 1; 3209#fibo2FINAL assume true; 3196#fibo2EXIT >#50#return; 3184#L15-1 call #t~ret8 := fibo2(~n - 2);< 3123#fibo2ENTRY ~n := #in~n; 3214#L20 assume ~n < 1;#res := 0; 3215#fibo2FINAL assume true; 3220#fibo2EXIT >#52#return; 3183#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 3217#fibo1FINAL assume true; 3201#fibo1EXIT >#48#return; 3198#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 3194#fibo2FINAL assume true; 3187#fibo2EXIT >#50#return; 3184#L15-1 [2021-10-11 00:34:20,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:34:20,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1448014817, now seen corresponding path program 2 times [2021-10-11 00:34:20,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:34:20,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008270813] [2021-10-11 00:34:20,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:34:20,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:20,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-10-11 00:34:20,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:20,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-11 00:34:20,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:20,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-11 00:34:20,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:20,463 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 00:34:20,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008270813] [2021-10-11 00:34:20,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423350418] [2021-10-11 00:34:20,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:34:20,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-11 00:34:20,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:34:20,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-11 00:34:20,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:34:20,645 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 00:34:20,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:34:20,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 19 [2021-10-11 00:34:20,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855358114] [2021-10-11 00:34:20,646 INFO L799 eck$LassoCheckResult]: stem already infeasible [2021-10-11 00:34:20,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:34:20,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1445694181, now seen corresponding path program 2 times [2021-10-11 00:34:20,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:34:20,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670153552] [2021-10-11 00:34:20,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:34:20,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:20,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-11 00:34:20,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:20,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-11 00:34:20,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:20,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-11 00:34:20,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:20,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-11 00:34:20,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:20,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-10-11 00:34:20,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:20,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-11 00:34:20,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:20,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-11 00:34:20,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:20,854 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-11 00:34:20,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670153552] [2021-10-11 00:34:20,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080983509] [2021-10-11 00:34:20,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:34:20,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-11 00:34:20,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:34:20,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-11 00:34:20,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:34:21,080 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-11 00:34:21,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:34:21,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-10-11 00:34:21,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925979156] [2021-10-11 00:34:21,083 INFO L811 eck$LassoCheckResult]: loop already infeasible [2021-10-11 00:34:21,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:34:21,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-11 00:34:21,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-10-11 00:34:21,085 INFO L87 Difference]: Start difference. First operand 194 states and 249 transitions. cyclomatic complexity: 60 Second operand 20 states. [2021-10-11 00:34:21,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:34:21,583 INFO L93 Difference]: Finished difference Result 230 states and 298 transitions. [2021-10-11 00:34:21,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-11 00:34:21,584 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 230 states and 298 transitions. [2021-10-11 00:34:21,593 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2021-10-11 00:34:21,613 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 230 states to 227 states and 294 transitions. [2021-10-11 00:34:21,614 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 149 [2021-10-11 00:34:21,614 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 149 [2021-10-11 00:34:21,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 227 states and 294 transitions. [2021-10-11 00:34:21,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-11 00:34:21,615 INFO L692 BuchiCegarLoop]: Abstraction has 227 states and 294 transitions. [2021-10-11 00:34:21,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states and 294 transitions. [2021-10-11 00:34:21,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 218. [2021-10-11 00:34:21,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2021-10-11 00:34:21,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 279 transitions. [2021-10-11 00:34:21,639 INFO L715 BuchiCegarLoop]: Abstraction has 218 states and 279 transitions. [2021-10-11 00:34:21,639 INFO L595 BuchiCegarLoop]: Abstraction has 218 states and 279 transitions. [2021-10-11 00:34:21,639 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2021-10-11 00:34:21,639 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 218 states and 279 transitions. [2021-10-11 00:34:21,642 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2021-10-11 00:34:21,642 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-11 00:34:21,642 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-11 00:34:21,646 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:34:21,647 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:34:21,649 INFO L794 eck$LassoCheckResult]: Stem: 3975#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 3974#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 3948#L39 call main_#t~ret11 := fibo1(main_~x~0);< 3949#fibo1ENTRY ~n := #in~n; 4049#L10 assume !(~n < 1); 4048#L12 assume !(1 == ~n); 3942#L15 call #t~ret7 := fibo2(~n - 1);< 4047#fibo2ENTRY ~n := #in~n; 3991#L20 assume !(~n < 1); 3941#L22 assume !(1 == ~n); 3936#L25 call #t~ret9 := fibo1(~n - 1);< 3966#fibo1ENTRY ~n := #in~n; 3935#L10 assume !(~n < 1); 3937#L12 assume !(1 == ~n); 3969#L15 call #t~ret7 := fibo2(~n - 1);< 3978#fibo2ENTRY ~n := #in~n; 3984#L20 assume !(~n < 1); 4046#L22 assume !(1 == ~n); 3956#L25 call #t~ret9 := fibo1(~n - 1);< 4044#fibo1ENTRY ~n := #in~n; 4042#L10 assume !(~n < 1); 4040#L12 assume !(1 == ~n); 3946#L15 call #t~ret7 := fibo2(~n - 1);< 4003#fibo2ENTRY ~n := #in~n; 4033#L20 assume !(~n < 1); 4030#L22 assume !(1 == ~n); 3987#L25 call #t~ret9 := fibo1(~n - 1);< 4018#fibo1ENTRY ~n := #in~n; 4023#L10 assume !(~n < 1); 4038#L12 assume !(1 == ~n); 4035#L15 call #t~ret7 := fibo2(~n - 1);< 4036#fibo2ENTRY ~n := #in~n; 4045#L20 assume !(~n < 1); 4043#L22 assume 1 == ~n;#res := 1; 4041#fibo2FINAL assume true; 4034#fibo2EXIT >#50#return; 3939#L15-1 call #t~ret8 := fibo2(~n - 2);< 4032#fibo2ENTRY ~n := #in~n; 4051#L20 assume ~n < 1;#res := 0; 3940#fibo2FINAL assume true; 4031#fibo2EXIT >#52#return; 4025#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 4022#fibo1FINAL assume true; 4017#fibo1EXIT >#46#return; 4009#L25-1 call #t~ret10 := fibo1(~n - 2);< 4016#fibo1ENTRY ~n := #in~n; 4054#L10 assume ~n < 1;#res := 0; 4135#fibo1FINAL assume true; 4132#fibo1EXIT >#48#return; 4127#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 4126#fibo2FINAL assume true; 4122#fibo2EXIT >#50#return; 3980#L15-1 call #t~ret8 := fibo2(~n - 2);< 3977#fibo2ENTRY [2021-10-11 00:34:21,650 INFO L796 eck$LassoCheckResult]: Loop: 3977#fibo2ENTRY ~n := #in~n; 3983#L20 assume !(~n < 1); 3990#L22 assume !(1 == ~n); 4107#L25 call #t~ret9 := fibo1(~n - 1);< 4087#fibo1ENTRY ~n := #in~n; 4120#L10 assume !(~n < 1); 4118#L12 assume !(1 == ~n); 3981#L15 call #t~ret7 := fibo2(~n - 1);< 3977#fibo2ENTRY [2021-10-11 00:34:21,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:34:21,650 INFO L82 PathProgramCache]: Analyzing trace with hash -199100099, now seen corresponding path program 1 times [2021-10-11 00:34:21,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:34:21,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753143402] [2021-10-11 00:34:21,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:34:21,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:21,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-10-11 00:34:21,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:21,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-11 00:34:21,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:21,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-11 00:34:21,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:21,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-11 00:34:21,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:21,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-10-11 00:34:21,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:21,949 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 5 proven. 54 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-11 00:34:21,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753143402] [2021-10-11 00:34:21,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761768066] [2021-10-11 00:34:21,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:34:22,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:22,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-11 00:34:22,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:34:22,202 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 55 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-11 00:34:22,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:34:22,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 22 [2021-10-11 00:34:22,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392635054] [2021-10-11 00:34:22,204 INFO L799 eck$LassoCheckResult]: stem already infeasible [2021-10-11 00:34:22,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:34:22,204 INFO L82 PathProgramCache]: Analyzing trace with hash -28526872, now seen corresponding path program 2 times [2021-10-11 00:34:22,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:34:22,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566730091] [2021-10-11 00:34:22,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:34:22,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:34:22,208 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:34:22,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:34:22,210 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:34:22,212 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-11 00:34:22,330 INFO L210 LassoAnalysis]: Preferences: [2021-10-11 00:34:22,331 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-11 00:34:22,331 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-11 00:34:22,331 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-11 00:34:22,331 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-11 00:34:22,331 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:22,331 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-11 00:34:22,331 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-11 00:34:22,331 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration7_Loop [2021-10-11 00:34:22,331 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-11 00:34:22,331 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2021-10-11 00:34:22,332 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:22,341 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:22,343 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:22,346 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:22,348 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:22,351 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:22,354 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:22,356 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:22,361 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:22,365 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:22,446 INFO L292 LassoAnalysis]: Preprocessing complete. [2021-10-11 00:34:22,446 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:22,453 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-11 00:34:22,453 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:22,480 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-11 00:34:22,480 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-11 00:34:22,540 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-11 00:34:22,541 INFO L210 LassoAnalysis]: Preferences: [2021-10-11 00:34:22,541 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-11 00:34:22,541 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-11 00:34:22,542 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-11 00:34:22,542 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-11 00:34:22,542 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:22,542 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-11 00:34:22,542 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-11 00:34:22,542 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration7_Loop [2021-10-11 00:34:22,542 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-11 00:34:22,542 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2021-10-11 00:34:22,543 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:22,555 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:22,559 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:22,569 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:22,574 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:22,577 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:22,581 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:22,584 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:22,587 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:22,591 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:22,694 INFO L292 LassoAnalysis]: Preprocessing complete. [2021-10-11 00:34:22,695 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:22,702 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2021-10-11 00:34:22,704 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-11 00:34:22,704 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-11 00:34:22,704 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-11 00:34:22,704 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-11 00:34:22,704 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-11 00:34:22,706 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-11 00:34:22,706 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-11 00:34:22,715 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:34:22,756 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2021-10-11 00:34:22,758 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-11 00:34:22,759 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-11 00:34:22,759 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-11 00:34:22,759 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-11 00:34:22,759 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-11 00:34:22,760 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-11 00:34:22,760 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:22,769 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:34:22,807 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:22,808 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-11 00:34:22,809 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-11 00:34:22,809 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-11 00:34:22,809 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-11 00:34:22,809 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-11 00:34:22,810 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-11 00:34:22,810 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-11 00:34:22,812 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-11 00:34:22,817 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-10-11 00:34:22,817 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:22,820 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-11 00:34:22,820 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-11 00:34:22,820 INFO L510 LassoAnalysis]: Proved termination. [2021-10-11 00:34:22,820 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_#in~n) = 1*fibo2_#in~n Supporting invariants [] [2021-10-11 00:34:22,844 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-11 00:34:22,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:34:22,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:22,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-11 00:34:22,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:34:23,076 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:23,102 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:23,113 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:23,125 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:23,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:23,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-11 00:34:23,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:34:23,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:34:23,225 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2021-10-11 00:34:23,225 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 218 states and 279 transitions. cyclomatic complexity: 66 Second operand 7 states. [2021-10-11 00:34:23,466 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 218 states and 279 transitions. cyclomatic complexity: 66. Second operand 7 states. Result 373 states and 474 transitions. Complement of second has 24 states. [2021-10-11 00:34:23,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2021-10-11 00:34:23,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-11 00:34:23,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 39 transitions. [2021-10-11 00:34:23,470 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 39 transitions. Stem has 53 letters. Loop has 8 letters. [2021-10-11 00:34:23,471 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-11 00:34:23,471 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-11 00:34:23,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:34:23,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:23,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-11 00:34:23,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:34:23,684 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:23,697 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:23,705 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:23,717 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:23,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:23,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-11 00:34:23,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:34:23,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:34:23,845 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 5 loop predicates [2021-10-11 00:34:23,846 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 218 states and 279 transitions. cyclomatic complexity: 66 Second operand 7 states. [2021-10-11 00:34:24,068 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 218 states and 279 transitions. cyclomatic complexity: 66. Second operand 7 states. Result 373 states and 474 transitions. Complement of second has 24 states. [2021-10-11 00:34:24,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2021-10-11 00:34:24,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-11 00:34:24,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 39 transitions. [2021-10-11 00:34:24,070 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 39 transitions. Stem has 53 letters. Loop has 8 letters. [2021-10-11 00:34:24,070 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-11 00:34:24,071 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-11 00:34:24,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:34:24,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:24,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-11 00:34:24,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:34:24,269 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:24,281 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:24,300 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:24,315 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:24,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:24,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-11 00:34:24,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:34:24,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:34:24,417 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2021-10-11 00:34:24,417 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 218 states and 279 transitions. cyclomatic complexity: 66 Second operand 7 states. [2021-10-11 00:34:24,657 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 218 states and 279 transitions. cyclomatic complexity: 66. Second operand 7 states. Result 461 states and 572 transitions. Complement of second has 23 states. [2021-10-11 00:34:24,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2021-10-11 00:34:24,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-11 00:34:24,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 43 transitions. [2021-10-11 00:34:24,659 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 53 letters. Loop has 8 letters. [2021-10-11 00:34:24,660 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-11 00:34:24,661 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 61 letters. Loop has 8 letters. [2021-10-11 00:34:24,662 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-11 00:34:24,663 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 53 letters. Loop has 16 letters. [2021-10-11 00:34:24,664 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-11 00:34:24,665 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 461 states and 572 transitions. [2021-10-11 00:34:24,676 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2021-10-11 00:34:24,683 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 461 states to 357 states and 463 transitions. [2021-10-11 00:34:24,684 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 193 [2021-10-11 00:34:24,684 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 207 [2021-10-11 00:34:24,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 357 states and 463 transitions. [2021-10-11 00:34:24,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-11 00:34:24,693 INFO L692 BuchiCegarLoop]: Abstraction has 357 states and 463 transitions. [2021-10-11 00:34:24,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states and 463 transitions. [2021-10-11 00:34:24,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 325. [2021-10-11 00:34:24,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2021-10-11 00:34:24,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 415 transitions. [2021-10-11 00:34:24,714 INFO L715 BuchiCegarLoop]: Abstraction has 325 states and 415 transitions. [2021-10-11 00:34:24,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:34:24,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-11 00:34:24,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-10-11 00:34:24,716 INFO L87 Difference]: Start difference. First operand 325 states and 415 transitions. Second operand 22 states. [2021-10-11 00:34:25,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:34:25,489 INFO L93 Difference]: Finished difference Result 337 states and 430 transitions. [2021-10-11 00:34:25,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-11 00:34:25,489 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 337 states and 430 transitions. [2021-10-11 00:34:25,498 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 38 [2021-10-11 00:34:25,504 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 337 states to 337 states and 430 transitions. [2021-10-11 00:34:25,504 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 200 [2021-10-11 00:34:25,505 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 200 [2021-10-11 00:34:25,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 337 states and 430 transitions. [2021-10-11 00:34:25,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-11 00:34:25,505 INFO L692 BuchiCegarLoop]: Abstraction has 337 states and 430 transitions. [2021-10-11 00:34:25,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states and 430 transitions. [2021-10-11 00:34:25,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 308. [2021-10-11 00:34:25,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2021-10-11 00:34:25,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 393 transitions. [2021-10-11 00:34:25,525 INFO L715 BuchiCegarLoop]: Abstraction has 308 states and 393 transitions. [2021-10-11 00:34:25,525 INFO L595 BuchiCegarLoop]: Abstraction has 308 states and 393 transitions. [2021-10-11 00:34:25,525 INFO L427 BuchiCegarLoop]: ======== Iteration 8============ [2021-10-11 00:34:25,525 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 308 states and 393 transitions. [2021-10-11 00:34:25,528 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 38 [2021-10-11 00:34:25,529 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-11 00:34:25,529 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-11 00:34:25,531 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:34:25,531 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:34:25,531 INFO L794 eck$LassoCheckResult]: Stem: 7005#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 6997#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 6975#L39 call main_#t~ret11 := fibo1(main_~x~0);< 6976#fibo1ENTRY ~n := #in~n; 7118#L10 assume !(~n < 1); 7117#L12 assume !(1 == ~n); 7113#L15 call #t~ret7 := fibo2(~n - 1);< 7116#fibo2ENTRY ~n := #in~n; 7115#L20 assume !(~n < 1); 7114#L22 assume !(1 == ~n); 7106#L25 call #t~ret9 := fibo1(~n - 1);< 7112#fibo1ENTRY ~n := #in~n; 7111#L10 assume !(~n < 1); 7109#L12 assume !(1 == ~n); 7100#L15 call #t~ret7 := fibo2(~n - 1);< 7105#fibo2ENTRY ~n := #in~n; 7104#L20 assume !(~n < 1); 7103#L22 assume !(1 == ~n); 7094#L25 call #t~ret9 := fibo1(~n - 1);< 7098#fibo1ENTRY ~n := #in~n; 7096#L10 assume !(~n < 1); 7095#L12 assume !(1 == ~n); 7042#L15 call #t~ret7 := fibo2(~n - 1);< 7093#fibo2ENTRY ~n := #in~n; 7087#L20 assume !(~n < 1); 7088#L22 assume !(1 == ~n); 7014#L25 call #t~ret9 := fibo1(~n - 1);< 7051#fibo1ENTRY ~n := #in~n; 7108#L10 assume !(~n < 1); 7039#L12 assume !(1 == ~n); 7040#L15 call #t~ret7 := fibo2(~n - 1);< 7093#fibo2ENTRY ~n := #in~n; 7087#L20 assume !(~n < 1); 7088#L22 assume !(1 == ~n); 7014#L25 call #t~ret9 := fibo1(~n - 1);< 7051#fibo1ENTRY ~n := #in~n; 7110#L10 assume !(~n < 1); 7248#L12 assume 1 == ~n;#res := 1; 7246#fibo1FINAL assume true; 7244#fibo1EXIT >#46#return; 7202#L25-1 call #t~ret10 := fibo1(~n - 2);< 7203#fibo1ENTRY ~n := #in~n; 7214#L10 assume ~n < 1;#res := 0; 7194#fibo1FINAL assume true; 7201#fibo1EXIT >#48#return; 7199#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 7197#fibo2FINAL assume true; 7121#fibo2EXIT >#50#return; 7012#L15-1 [2021-10-11 00:34:25,532 INFO L796 eck$LassoCheckResult]: Loop: 7012#L15-1 call #t~ret8 := fibo2(~n - 2);< 7134#fibo2ENTRY ~n := #in~n; 7010#L20 assume !(~n < 1); 7153#L22 assume !(1 == ~n); 7146#L25 call #t~ret9 := fibo1(~n - 1);< 7152#fibo1ENTRY ~n := #in~n; 7175#L10 assume !(~n < 1); 7174#L12 assume !(1 == ~n); 7008#L15 call #t~ret7 := fibo2(~n - 1);< 7007#fibo2ENTRY ~n := #in~n; 7009#L20 assume !(~n < 1); 7177#L22 assume !(1 == ~n); 7178#L25 call #t~ret9 := fibo1(~n - 1);< 7240#fibo1ENTRY ~n := #in~n; 7243#L10 assume !(~n < 1); 7242#L12 assume 1 == ~n;#res := 1; 7241#fibo1FINAL assume true; 7239#fibo1EXIT >#46#return; 6999#L25-1 call #t~ret10 := fibo1(~n - 2);< 6998#fibo1ENTRY ~n := #in~n; 7000#L10 assume ~n < 1;#res := 0; 7207#fibo1FINAL assume true; 7181#fibo1EXIT >#48#return; 7179#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 7160#fibo2FINAL assume true; 7170#fibo2EXIT >#50#return; 7012#L15-1 [2021-10-11 00:34:25,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:34:25,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1654199334, now seen corresponding path program 3 times [2021-10-11 00:34:25,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:34:25,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229546971] [2021-10-11 00:34:25,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:34:25,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:25,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-10-11 00:34:25,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:25,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-11 00:34:25,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:25,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-11 00:34:25,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:25,856 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-11 00:34:25,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229546971] [2021-10-11 00:34:25,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146518555] [2021-10-11 00:34:25,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:34:25,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-11 00:34:25,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:34:25,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-11 00:34:25,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:34:26,127 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 00:34:26,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:34:26,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 23 [2021-10-11 00:34:26,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806986389] [2021-10-11 00:34:26,129 INFO L799 eck$LassoCheckResult]: stem already infeasible [2021-10-11 00:34:26,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:34:26,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1626884941, now seen corresponding path program 1 times [2021-10-11 00:34:26,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:34:26,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104958490] [2021-10-11 00:34:26,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:34:26,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:34:26,135 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:34:26,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:34:26,140 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:34:26,142 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-11 00:34:26,601 INFO L210 LassoAnalysis]: Preferences: [2021-10-11 00:34:26,601 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-11 00:34:26,601 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-11 00:34:26,602 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-11 00:34:26,602 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-11 00:34:26,602 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:26,602 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-11 00:34:26,602 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-11 00:34:26,602 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration8_Loop [2021-10-11 00:34:26,602 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-11 00:34:26,602 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2021-10-11 00:34:26,603 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:26,619 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:26,621 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:26,625 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:26,638 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:26,642 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:26,654 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:26,659 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:26,662 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:26,767 INFO L292 LassoAnalysis]: Preprocessing complete. [2021-10-11 00:34:26,768 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:26,770 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-11 00:34:26,770 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:26,794 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-11 00:34:26,794 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-11 00:34:27,342 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-11 00:34:27,344 INFO L210 LassoAnalysis]: Preferences: [2021-10-11 00:34:27,344 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-11 00:34:27,344 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-11 00:34:27,344 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-11 00:34:27,344 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-11 00:34:27,344 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:27,345 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-11 00:34:27,345 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-11 00:34:27,345 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration8_Loop [2021-10-11 00:34:27,345 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-11 00:34:27,345 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2021-10-11 00:34:27,345 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:27,364 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:27,367 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:27,370 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:27,374 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:27,377 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:27,379 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:27,382 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:27,385 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:27,475 INFO L292 LassoAnalysis]: Preprocessing complete. [2021-10-11 00:34:27,475 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:27,478 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2021-10-11 00:34:27,480 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-11 00:34:27,480 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-11 00:34:27,480 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-11 00:34:27,481 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-11 00:34:27,481 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-11 00:34:27,483 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-11 00:34:27,483 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-11 00:34:27,486 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-11 00:34:27,495 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-10-11 00:34:27,495 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:27,498 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-11 00:34:27,498 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-11 00:34:27,499 INFO L510 LassoAnalysis]: Proved termination. [2021-10-11 00:34:27,499 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] [2021-10-11 00:34:27,521 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-11 00:34:27,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:34:27,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:27,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-11 00:34:27,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:34:27,722 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:27,730 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:27,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:27,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-11 00:34:27,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:34:27,993 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 00:34:27,996 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 10 loop predicates [2021-10-11 00:34:27,996 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 308 states and 393 transitions. cyclomatic complexity: 91 Second operand 12 states. [2021-10-11 00:34:28,623 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 308 states and 393 transitions. cyclomatic complexity: 91. Second operand 12 states. Result 1082 states and 1385 transitions. Complement of second has 46 states. [2021-10-11 00:34:28,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 13 states 2 stem states 10 non-accepting loop states 1 accepting loop states [2021-10-11 00:34:28,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-11 00:34:28,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 68 transitions. [2021-10-11 00:34:28,625 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 13 states and 68 transitions. Stem has 48 letters. Loop has 26 letters. [2021-10-11 00:34:28,628 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-11 00:34:28,628 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 13 states and 68 transitions. Stem has 74 letters. Loop has 26 letters. [2021-10-11 00:34:28,629 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-11 00:34:28,629 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 13 states and 68 transitions. Stem has 48 letters. Loop has 52 letters. [2021-10-11 00:34:28,632 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-11 00:34:28,632 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1082 states and 1385 transitions. [2021-10-11 00:34:28,652 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 86 [2021-10-11 00:34:28,672 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1082 states to 999 states and 1294 transitions. [2021-10-11 00:34:28,672 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 410 [2021-10-11 00:34:28,674 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 434 [2021-10-11 00:34:28,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 999 states and 1294 transitions. [2021-10-11 00:34:28,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-11 00:34:28,674 INFO L692 BuchiCegarLoop]: Abstraction has 999 states and 1294 transitions. [2021-10-11 00:34:28,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states and 1294 transitions. [2021-10-11 00:34:28,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 950. [2021-10-11 00:34:28,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 950 states. [2021-10-11 00:34:28,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1231 transitions. [2021-10-11 00:34:28,723 INFO L715 BuchiCegarLoop]: Abstraction has 950 states and 1231 transitions. [2021-10-11 00:34:28,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:34:28,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-11 00:34:28,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-10-11 00:34:28,728 INFO L87 Difference]: Start difference. First operand 950 states and 1231 transitions. Second operand 24 states. [2021-10-11 00:34:29,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:34:29,906 INFO L93 Difference]: Finished difference Result 1015 states and 1197 transitions. [2021-10-11 00:34:29,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-11 00:34:29,908 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1015 states and 1197 transitions. [2021-10-11 00:34:29,924 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 90 [2021-10-11 00:34:29,931 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1015 states to 441 states and 512 transitions. [2021-10-11 00:34:29,931 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 280 [2021-10-11 00:34:29,932 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 280 [2021-10-11 00:34:29,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 441 states and 512 transitions. [2021-10-11 00:34:29,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-11 00:34:29,933 INFO L692 BuchiCegarLoop]: Abstraction has 441 states and 512 transitions. [2021-10-11 00:34:29,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states and 512 transitions. [2021-10-11 00:34:29,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 393. [2021-10-11 00:34:29,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2021-10-11 00:34:29,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 457 transitions. [2021-10-11 00:34:29,953 INFO L715 BuchiCegarLoop]: Abstraction has 393 states and 457 transitions. [2021-10-11 00:34:29,953 INFO L595 BuchiCegarLoop]: Abstraction has 393 states and 457 transitions. [2021-10-11 00:34:29,953 INFO L427 BuchiCegarLoop]: ======== Iteration 9============ [2021-10-11 00:34:29,953 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 393 states and 457 transitions. [2021-10-11 00:34:29,959 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 64 [2021-10-11 00:34:29,959 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-11 00:34:29,959 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-11 00:34:29,966 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:34:29,967 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:34:29,969 INFO L794 eck$LassoCheckResult]: Stem: 10898#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 10895#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 10881#L39 call main_#t~ret11 := fibo1(main_~x~0);< 10882#fibo1ENTRY ~n := #in~n; 10980#L10 assume !(~n < 1); 10979#L12 assume !(1 == ~n); 10975#L15 call #t~ret7 := fibo2(~n - 1);< 10978#fibo2ENTRY ~n := #in~n; 10977#L20 assume !(~n < 1); 10976#L22 assume !(1 == ~n); 10971#L25 call #t~ret9 := fibo1(~n - 1);< 10974#fibo1ENTRY ~n := #in~n; 10973#L10 assume !(~n < 1); 10972#L12 assume !(1 == ~n); 10967#L15 call #t~ret7 := fibo2(~n - 1);< 10970#fibo2ENTRY ~n := #in~n; 10969#L20 assume !(~n < 1); 10968#L22 assume !(1 == ~n); 10962#L25 call #t~ret9 := fibo1(~n - 1);< 10966#fibo1ENTRY ~n := #in~n; 10965#L10 assume !(~n < 1); 10964#L12 assume !(1 == ~n); 10848#L15 call #t~ret7 := fibo2(~n - 1);< 10963#fibo2ENTRY ~n := #in~n; 11004#L20 assume !(~n < 1); 11002#L22 assume !(1 == ~n); 10947#L25 call #t~ret9 := fibo1(~n - 1);< 11007#fibo1ENTRY ~n := #in~n; 11008#L10 assume !(~n < 1); 11022#L12 assume !(1 == ~n); 11018#L15 call #t~ret7 := fibo2(~n - 1);< 11019#fibo2ENTRY ~n := #in~n; 11024#L20 assume !(~n < 1); 11023#L22 assume 1 == ~n;#res := 1; 11021#fibo2FINAL assume true; 11017#fibo2EXIT >#50#return; 11014#L15-1 call #t~ret8 := fibo2(~n - 2);< 11015#fibo2ENTRY ~n := #in~n; 11020#L20 assume ~n < 1;#res := 0; 11016#fibo2FINAL assume true; 11013#fibo2EXIT >#52#return; 11012#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 11011#fibo1FINAL assume true; 10946#fibo1EXIT >#46#return; 10926#L25-1 call #t~ret10 := fibo1(~n - 2);< 10928#fibo1ENTRY ~n := #in~n; 10927#L10 assume !(~n < 1); 10925#L12 assume !(1 == ~n); 10912#L15 call #t~ret7 := fibo2(~n - 1);< 11081#fibo2ENTRY ~n := #in~n; 11143#L20 assume !(~n < 1); 11140#L22 assume 1 == ~n;#res := 1; 11141#fibo2FINAL assume true; 11079#fibo2EXIT >#50#return; 10847#L15-1 [2021-10-11 00:34:29,969 INFO L796 eck$LassoCheckResult]: Loop: 10847#L15-1 call #t~ret8 := fibo2(~n - 2);< 11066#fibo2ENTRY ~n := #in~n; 11067#L20 assume !(~n < 1); 11056#L22 assume !(1 == ~n); 11042#L25 call #t~ret9 := fibo1(~n - 1);< 11049#fibo1ENTRY ~n := #in~n; 11089#L10 assume !(~n < 1); 11084#L12 assume !(1 == ~n); 10850#L15 call #t~ret7 := fibo2(~n - 1);< 11080#fibo2ENTRY ~n := #in~n; 11083#L20 assume !(~n < 1); 11178#L22 assume 1 == ~n;#res := 1; 11179#fibo2FINAL assume true; 11078#fibo2EXIT >#50#return; 10847#L15-1 [2021-10-11 00:34:29,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:34:29,970 INFO L82 PathProgramCache]: Analyzing trace with hash 628833608, now seen corresponding path program 1 times [2021-10-11 00:34:29,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:34:29,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120777734] [2021-10-11 00:34:29,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:34:29,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:30,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-10-11 00:34:30,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:30,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-11 00:34:30,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:30,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-11 00:34:30,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:30,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-10-11 00:34:30,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:30,246 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 40 proven. 36 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-11 00:34:30,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120777734] [2021-10-11 00:34:30,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561597212] [2021-10-11 00:34:30,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:34:30,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:30,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-11 00:34:30,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:34:30,427 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 47 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-11 00:34:30,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:34:30,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-10-11 00:34:30,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323461660] [2021-10-11 00:34:30,429 INFO L799 eck$LassoCheckResult]: stem already infeasible [2021-10-11 00:34:30,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:34:30,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1489002864, now seen corresponding path program 1 times [2021-10-11 00:34:30,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:34:30,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702308150] [2021-10-11 00:34:30,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:34:30,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:34:30,433 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:34:30,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:34:30,436 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:34:30,439 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-11 00:34:30,635 INFO L210 LassoAnalysis]: Preferences: [2021-10-11 00:34:30,635 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-11 00:34:30,636 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-11 00:34:30,636 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-11 00:34:30,636 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-11 00:34:30,636 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:30,636 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-11 00:34:30,636 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-11 00:34:30,637 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration9_Loop [2021-10-11 00:34:30,637 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-11 00:34:30,637 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2021-10-11 00:34:30,638 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:30,641 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:30,644 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:30,654 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:30,657 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:30,660 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:30,663 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:30,666 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:30,669 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:30,744 INFO L292 LassoAnalysis]: Preprocessing complete. [2021-10-11 00:34:30,744 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:34:30,754 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-11 00:34:30,755 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:30,769 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-11 00:34:30,769 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_~n=0} Honda state: {fibo2_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:30,798 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-11 00:34:30,798 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-11 00:34:30,801 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-11 00:34:30,801 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#in~n=0} Honda state: {fibo2_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:30,826 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-11 00:34:30,826 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:30,856 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-11 00:34:30,856 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-11 00:34:31,660 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-11 00:34:31,662 INFO L210 LassoAnalysis]: Preferences: [2021-10-11 00:34:31,662 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-11 00:34:31,662 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-11 00:34:31,662 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-11 00:34:31,662 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-11 00:34:31,662 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:31,662 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-11 00:34:31,662 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-11 00:34:31,663 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration9_Loop [2021-10-11 00:34:31,663 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-11 00:34:31,663 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2021-10-11 00:34:31,663 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:31,669 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:31,676 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:31,687 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:31,690 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:31,694 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:31,697 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:31,700 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:31,708 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:31,783 INFO L292 LassoAnalysis]: Preprocessing complete. [2021-10-11 00:34:31,783 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:34:31,787 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2021-10-11 00:34:31,789 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-11 00:34:31,789 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-11 00:34:31,789 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-11 00:34:31,789 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-11 00:34:31,790 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-11 00:34:31,791 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-11 00:34:31,791 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:31,808 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:34:31,853 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2021-10-11 00:34:31,856 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-11 00:34:31,856 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-11 00:34:31,856 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-11 00:34:31,856 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-11 00:34:31,856 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-11 00:34:31,857 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-11 00:34:31,857 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:31,868 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:31,895 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2021-10-11 00:34:31,896 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-11 00:34:31,896 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-11 00:34:31,897 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-11 00:34:31,897 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-11 00:34:31,897 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-11 00:34:31,899 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-11 00:34:31,899 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-11 00:34:31,910 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-11 00:34:31,913 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-10-11 00:34:31,913 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:34:31,916 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... Waiting until toolchain timeout for monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:31,916 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-11 00:34:31,916 INFO L510 LassoAnalysis]: Proved termination. [2021-10-11 00:34:31,916 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] [2021-10-11 00:34:31,938 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-11 00:34:31,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:34:32,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:32,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-11 00:34:32,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:34:32,140 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:32,150 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:32,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:32,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-11 00:34:32,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:34:32,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:34:32,378 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 8 loop predicates [2021-10-11 00:34:32,378 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 393 states and 457 transitions. cyclomatic complexity: 72 Second operand 10 states. [2021-10-11 00:34:32,793 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 393 states and 457 transitions. cyclomatic complexity: 72. Second operand 10 states. Result 544 states and 622 transitions. Complement of second has 40 states. [2021-10-11 00:34:32,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 2 stem states 9 non-accepting loop states 1 accepting loop states [2021-10-11 00:34:32,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-11 00:34:32,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 50 transitions. [2021-10-11 00:34:32,795 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 50 transitions. Stem has 54 letters. Loop has 14 letters. [2021-10-11 00:34:32,795 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-11 00:34:32,795 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-11 00:34:32,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:34:32,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:32,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-11 00:34:32,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:34:32,971 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:32,980 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:33,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:33,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-11 00:34:33,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:34:33,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:34:33,161 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 8 loop predicates [2021-10-11 00:34:33,161 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 393 states and 457 transitions. cyclomatic complexity: 72 Second operand 10 states. [2021-10-11 00:34:33,485 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 393 states and 457 transitions. cyclomatic complexity: 72. Second operand 10 states. Result 466 states and 534 transitions. Complement of second has 26 states. [2021-10-11 00:34:33,486 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 [2021-10-11 00:34:33,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-11 00:34:33,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 31 transitions. [2021-10-11 00:34:33,488 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 31 transitions. Stem has 54 letters. Loop has 14 letters. [2021-10-11 00:34:33,488 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-11 00:34:33,488 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-11 00:34:33,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:34:33,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:33,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-11 00:34:33,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:34:33,690 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:33,699 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:33,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:33,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-11 00:34:33,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:34:33,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:34:33,881 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 8 loop predicates [2021-10-11 00:34:33,881 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 393 states and 457 transitions. cyclomatic complexity: 72 Second operand 10 states. [2021-10-11 00:34:34,447 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 393 states and 457 transitions. cyclomatic complexity: 72. Second operand 10 states. Result 1499 states and 1736 transitions. Complement of second has 102 states. [2021-10-11 00:34:34,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 2 stem states 9 non-accepting loop states 1 accepting loop states [2021-10-11 00:34:34,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-11 00:34:34,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 72 transitions. [2021-10-11 00:34:34,465 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 72 transitions. Stem has 54 letters. Loop has 14 letters. [2021-10-11 00:34:34,465 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-11 00:34:34,465 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 72 transitions. Stem has 68 letters. Loop has 14 letters. [2021-10-11 00:34:34,470 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-11 00:34:34,470 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 72 transitions. Stem has 54 letters. Loop has 28 letters. [2021-10-11 00:34:34,471 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-11 00:34:34,471 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1499 states and 1736 transitions. [2021-10-11 00:34:34,511 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 166 [2021-10-11 00:34:34,534 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1499 states to 884 states and 1047 transitions. [2021-10-11 00:34:34,535 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 407 [2021-10-11 00:34:34,536 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 454 [2021-10-11 00:34:34,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 884 states and 1047 transitions. [2021-10-11 00:34:34,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-11 00:34:34,537 INFO L692 BuchiCegarLoop]: Abstraction has 884 states and 1047 transitions. [2021-10-11 00:34:34,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states and 1047 transitions. [2021-10-11 00:34:34,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 796. [2021-10-11 00:34:34,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 796 states. [2021-10-11 00:34:34,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 933 transitions. [2021-10-11 00:34:34,573 INFO L715 BuchiCegarLoop]: Abstraction has 796 states and 933 transitions. [2021-10-11 00:34:34,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:34:34,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-11 00:34:34,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-10-11 00:34:34,574 INFO L87 Difference]: Start difference. First operand 796 states and 933 transitions. Second operand 20 states. [2021-10-11 00:34:35,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:34:35,281 INFO L93 Difference]: Finished difference Result 615 states and 719 transitions. [2021-10-11 00:34:35,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-11 00:34:35,283 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 615 states and 719 transitions. [2021-10-11 00:34:35,291 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 40 [2021-10-11 00:34:35,298 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 615 states to 498 states and 591 transitions. [2021-10-11 00:34:35,298 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 283 [2021-10-11 00:34:35,299 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 307 [2021-10-11 00:34:35,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 498 states and 591 transitions. [2021-10-11 00:34:35,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-11 00:34:35,299 INFO L692 BuchiCegarLoop]: Abstraction has 498 states and 591 transitions. [2021-10-11 00:34:35,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states and 591 transitions. [2021-10-11 00:34:35,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 489. [2021-10-11 00:34:35,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 489 states. [2021-10-11 00:34:35,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 579 transitions. [2021-10-11 00:34:35,317 INFO L715 BuchiCegarLoop]: Abstraction has 489 states and 579 transitions. [2021-10-11 00:34:35,317 INFO L595 BuchiCegarLoop]: Abstraction has 489 states and 579 transitions. [2021-10-11 00:34:35,317 INFO L427 BuchiCegarLoop]: ======== Iteration 10============ [2021-10-11 00:34:35,317 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 489 states and 579 transitions. [2021-10-11 00:34:35,322 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 40 [2021-10-11 00:34:35,323 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-11 00:34:35,323 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-11 00:34:35,324 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:34:35,324 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:34:35,324 INFO L794 eck$LassoCheckResult]: Stem: 16317#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 16316#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 16290#L39 call main_#t~ret11 := fibo1(main_~x~0);< 16291#fibo1ENTRY ~n := #in~n; 16418#L10 assume !(~n < 1); 16416#L12 assume !(1 == ~n); 16413#L15 call #t~ret7 := fibo2(~n - 1);< 16414#fibo2ENTRY ~n := #in~n; 16428#L20 assume !(~n < 1); 16426#L22 assume !(1 == ~n); 16423#L25 call #t~ret9 := fibo1(~n - 1);< 16424#fibo1ENTRY ~n := #in~n; 16442#L10 assume !(~n < 1); 16440#L12 assume !(1 == ~n); 16438#L15 call #t~ret7 := fibo2(~n - 1);< 16439#fibo2ENTRY ~n := #in~n; 16512#L20 assume !(~n < 1); 16510#L22 assume !(1 == ~n); 16456#L25 call #t~ret9 := fibo1(~n - 1);< 16457#fibo1ENTRY ~n := #in~n; 16474#L10 assume !(~n < 1); 16471#L12 assume !(1 == ~n); 16467#L15 call #t~ret7 := fibo2(~n - 1);< 16468#fibo2ENTRY ~n := #in~n; 16532#L20 assume !(~n < 1); 16530#L22 assume !(1 == ~n); 16528#L25 call #t~ret9 := fibo1(~n - 1);< 16529#fibo1ENTRY ~n := #in~n; 16565#L10 assume !(~n < 1); 16564#L12 assume !(1 == ~n); 16562#L15 call #t~ret7 := fibo2(~n - 1);< 16563#fibo2ENTRY ~n := #in~n; 16568#L20 assume !(~n < 1); 16567#L22 assume 1 == ~n;#res := 1; 16566#fibo2FINAL assume true; 16561#fibo2EXIT >#50#return; 16559#L15-1 call #t~ret8 := fibo2(~n - 2);< 16560#fibo2ENTRY ~n := #in~n; 16579#L20 assume ~n < 1;#res := 0; 16577#fibo2FINAL assume true; 16558#fibo2EXIT >#52#return; 16549#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 16547#fibo1FINAL assume true; 16527#fibo1EXIT >#46#return; 16519#L25-1 call #t~ret10 := fibo1(~n - 2);< 16520#fibo1ENTRY ~n := #in~n; 16537#L10 assume !(~n < 1); 16526#L12 assume 1 == ~n;#res := 1; 16525#fibo1FINAL assume true; 16518#fibo1EXIT >#48#return; 16516#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 16514#fibo2FINAL assume true; 16466#fibo2EXIT >#50#return; 16264#L15-1 call #t~ret8 := fibo2(~n - 2);< 16465#fibo2ENTRY ~n := #in~n; 16733#L20 assume ~n < 1;#res := 0; 16734#fibo2FINAL assume true; 16726#fibo2EXIT >#52#return; 16461#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 16459#fibo1FINAL assume true; 16455#fibo1EXIT >#46#return; 16453#L25-1 call #t~ret10 := fibo1(~n - 2);< 16454#fibo1ENTRY ~n := #in~n; 16493#L10 assume !(~n < 1); 16492#L12 assume !(1 == ~n); 16267#L15 call #t~ret7 := fibo2(~n - 1);< 16491#fibo2ENTRY [2021-10-11 00:34:35,325 INFO L796 eck$LassoCheckResult]: Loop: 16491#fibo2ENTRY ~n := #in~n; 16499#L20 assume !(~n < 1); 16497#L22 assume !(1 == ~n); 16306#L25 call #t~ret9 := fibo1(~n - 1);< 16307#fibo1ENTRY ~n := #in~n; 16318#L10 assume !(~n < 1); 16495#L12 assume !(1 == ~n); 16270#L15 call #t~ret7 := fibo2(~n - 1);< 16491#fibo2ENTRY [2021-10-11 00:34:35,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:34:35,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1675480062, now seen corresponding path program 2 times [2021-10-11 00:34:35,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:34:35,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294671764] [2021-10-11 00:34:35,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:34:35,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:35,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-11 00:34:35,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:35,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-11 00:34:35,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:35,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-11 00:34:35,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:35,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-11 00:34:35,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:35,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-11 00:34:35,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:35,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-10-11 00:34:35,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:35,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-10-11 00:34:35,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:35,591 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 36 proven. 57 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-11 00:34:35,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294671764] [2021-10-11 00:34:35,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103195371] [2021-10-11 00:34:35,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:34:35,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-11 00:34:35,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:34:35,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-11 00:34:35,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:34:35,844 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 35 proven. 57 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-10-11 00:34:35,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:34:35,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 20 [2021-10-11 00:34:35,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497848726] [2021-10-11 00:34:35,846 INFO L799 eck$LassoCheckResult]: stem already infeasible [2021-10-11 00:34:35,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:34:35,846 INFO L82 PathProgramCache]: Analyzing trace with hash -28526872, now seen corresponding path program 3 times [2021-10-11 00:34:35,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:34:35,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905120353] [2021-10-11 00:34:35,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:34:35,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:34:35,849 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:34:35,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:34:35,851 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:34:35,852 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-11 00:34:35,974 INFO L210 LassoAnalysis]: Preferences: [2021-10-11 00:34:35,974 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-11 00:34:35,974 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-11 00:34:35,974 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-11 00:34:35,974 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-11 00:34:35,974 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:35,974 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-11 00:34:35,975 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-11 00:34:35,975 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration10_Loop [2021-10-11 00:34:35,975 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-11 00:34:35,975 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2021-10-11 00:34:35,975 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:35,978 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:35,980 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:35,983 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:35,985 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:35,988 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:35,991 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:35,993 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:35,996 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:36,005 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:36,095 INFO L292 LassoAnalysis]: Preprocessing complete. [2021-10-11 00:34:36,096 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:36,101 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-11 00:34:36,101 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-11 00:34:36,104 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-11 00:34:36,104 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret7=0} Honda state: {fibo1_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:36,128 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-11 00:34:36,129 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-11 00:34:36,131 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-11 00:34:36,131 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret9=0} Honda state: {fibo2_#t~ret9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:34:36,155 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-11 00:34:36,155 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:36,158 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-11 00:34:36,158 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret8=0} Honda state: {fibo1_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:36,182 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-11 00:34:36,182 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-11 00:34:36,186 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-11 00:34:36,186 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:36,210 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-11 00:34:36,210 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-11 00:34:36,213 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-11 00:34:36,213 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#in~n=0} Honda state: {fibo1_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:36,237 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-11 00:34:36,237 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-11 00:34:36,239 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-11 00:34:36,239 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_~n=0} Honda state: {fibo2_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:36,263 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-11 00:34:36,263 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-11 00:34:36,266 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-11 00:34:36,266 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 69 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:34:36,290 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-11 00:34:36,290 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 69 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:36,293 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-11 00:34:36,293 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:36,315 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-11 00:34:36,316 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:36,341 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-11 00:34:36,341 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-11 00:34:36,367 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-11 00:34:36,369 INFO L210 LassoAnalysis]: Preferences: [2021-10-11 00:34:36,369 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-11 00:34:36,369 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-11 00:34:36,369 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-11 00:34:36,369 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-11 00:34:36,369 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:36,369 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-11 00:34:36,369 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-11 00:34:36,369 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration10_Loop [2021-10-11 00:34:36,369 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-11 00:34:36,369 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2021-10-11 00:34:36,370 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:36,373 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:36,375 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:36,378 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:36,380 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:36,383 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:36,387 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:36,390 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:36,400 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:36,403 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:36,471 INFO L292 LassoAnalysis]: Preprocessing complete. [2021-10-11 00:34:36,471 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:36,475 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2021-10-11 00:34:36,476 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-11 00:34:36,476 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-11 00:34:36,477 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-11 00:34:36,477 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-11 00:34:36,477 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-11 00:34:36,477 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-11 00:34:36,477 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-11 00:34:36,478 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:36,502 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2021-10-11 00:34:36,503 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-11 00:34:36,503 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-11 00:34:36,504 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-11 00:34:36,504 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-11 00:34:36,504 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-11 00:34:36,504 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-11 00:34:36,505 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-11 00:34:36,506 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:36,530 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2021-10-11 00:34:36,531 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-11 00:34:36,531 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-11 00:34:36,531 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-11 00:34:36,531 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-11 00:34:36,531 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-11 00:34:36,532 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-11 00:34:36,532 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-11 00:34:36,533 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 75 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:36,559 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2021-10-11 00:34:36,561 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-11 00:34:36,561 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-11 00:34:36,561 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-11 00:34:36,561 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-11 00:34:36,561 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-11 00:34:36,562 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-11 00:34:36,562 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-11 00:34:36,563 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 76 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:36,587 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2021-10-11 00:34:36,591 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-11 00:34:36,592 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-11 00:34:36,592 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-11 00:34:36,592 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-11 00:34:36,592 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-11 00:34:36,592 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-11 00:34:36,592 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-11 00:34:36,594 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:36,617 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2021-10-11 00:34:36,618 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-11 00:34:36,619 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-11 00:34:36,619 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-11 00:34:36,619 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-11 00:34:36,619 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-11 00:34:36,619 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-11 00:34:36,619 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-11 00:34:36,621 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:36,645 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2021-10-11 00:34:36,646 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-11 00:34:36,646 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-11 00:34:36,646 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-11 00:34:36,646 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-11 00:34:36,647 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-11 00:34:36,647 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-11 00:34:36,647 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-11 00:34:36,653 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 79 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:36,677 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2021-10-11 00:34:36,678 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-11 00:34:36,678 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-11 00:34:36,679 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-11 00:34:36,679 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-11 00:34:36,679 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-11 00:34:36,679 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-11 00:34:36,680 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-11 00:34:36,682 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-11 00:34:36,685 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-11 00:34:36,685 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:36,687 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-11 00:34:36,687 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-11 00:34:36,688 INFO L510 LassoAnalysis]: Proved termination. [2021-10-11 00:34:36,688 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_#in~n) = 1*fibo2_#in~n Supporting invariants [] [2021-10-11 00:34:36,711 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-11 00:34:36,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:34:36,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:36,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-11 00:34:36,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:34:36,895 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:36,904 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:36,910 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:36,919 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:36,925 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:36,934 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:36,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:36,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-11 00:34:36,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:34:37,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:34:37,028 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2021-10-11 00:34:37,029 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 489 states and 579 transitions. cyclomatic complexity: 96 Second operand 7 states. [2021-10-11 00:34:37,236 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 489 states and 579 transitions. cyclomatic complexity: 96. Second operand 7 states. Result 514 states and 604 transitions. Complement of second has 15 states. [2021-10-11 00:34:37,237 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 [2021-10-11 00:34:37,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-11 00:34:37,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 17 transitions. [2021-10-11 00:34:37,251 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 17 transitions. Stem has 66 letters. Loop has 8 letters. [2021-10-11 00:34:37,251 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-11 00:34:37,251 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-11 00:34:37,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:34:37,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:37,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-11 00:34:37,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:34:37,468 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:37,482 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:37,488 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:37,500 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:37,507 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:37,519 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:37,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:37,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-11 00:34:37,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:34:37,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:34:37,620 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 5 loop predicates [2021-10-11 00:34:37,620 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 489 states and 579 transitions. cyclomatic complexity: 96 Second operand 7 states. [2021-10-11 00:34:37,774 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 489 states and 579 transitions. cyclomatic complexity: 96. Second operand 7 states. Result 514 states and 604 transitions. Complement of second has 15 states. [2021-10-11 00:34:37,775 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 [2021-10-11 00:34:37,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-11 00:34:37,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 17 transitions. [2021-10-11 00:34:37,776 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 17 transitions. Stem has 66 letters. Loop has 8 letters. [2021-10-11 00:34:37,776 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-11 00:34:37,776 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-11 00:34:37,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:34:37,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:37,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-11 00:34:37,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:34:37,981 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:37,990 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:37,996 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:38,005 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:38,011 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:38,020 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:38,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:38,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-11 00:34:38,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:34:38,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:34:38,117 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2021-10-11 00:34:38,117 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 489 states and 579 transitions. cyclomatic complexity: 96 Second operand 7 states. [2021-10-11 00:34:38,370 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 489 states and 579 transitions. cyclomatic complexity: 96. Second operand 7 states. Result 759 states and 876 transitions. Complement of second has 25 states. [2021-10-11 00:34:38,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2021-10-11 00:34:38,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-11 00:34:38,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 42 transitions. [2021-10-11 00:34:38,372 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 42 transitions. Stem has 66 letters. Loop has 8 letters. [2021-10-11 00:34:38,372 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-11 00:34:38,373 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 42 transitions. Stem has 74 letters. Loop has 8 letters. [2021-10-11 00:34:38,373 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-11 00:34:38,374 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 42 transitions. Stem has 66 letters. Loop has 16 letters. [2021-10-11 00:34:38,374 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-11 00:34:38,375 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 759 states and 876 transitions. [2021-10-11 00:34:38,386 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 24 [2021-10-11 00:34:38,394 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 759 states to 566 states and 664 transitions. [2021-10-11 00:34:38,394 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 299 [2021-10-11 00:34:38,395 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 329 [2021-10-11 00:34:38,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 566 states and 664 transitions. [2021-10-11 00:34:38,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-11 00:34:38,396 INFO L692 BuchiCegarLoop]: Abstraction has 566 states and 664 transitions. [2021-10-11 00:34:38,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states and 664 transitions. [2021-10-11 00:34:38,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 537. [2021-10-11 00:34:38,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 537 states. [2021-10-11 00:34:38,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 630 transitions. [2021-10-11 00:34:38,418 INFO L715 BuchiCegarLoop]: Abstraction has 537 states and 630 transitions. [2021-10-11 00:34:38,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:34:38,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-11 00:34:38,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-10-11 00:34:38,420 INFO L87 Difference]: Start difference. First operand 537 states and 630 transitions. Second operand 20 states. [2021-10-11 00:34:39,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:34:39,019 INFO L93 Difference]: Finished difference Result 563 states and 667 transitions. [2021-10-11 00:34:39,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-11 00:34:39,020 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 563 states and 667 transitions. [2021-10-11 00:34:39,027 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 24 [2021-10-11 00:34:39,035 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 563 states to 557 states and 660 transitions. [2021-10-11 00:34:39,035 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 316 [2021-10-11 00:34:39,036 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 316 [2021-10-11 00:34:39,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 557 states and 660 transitions. [2021-10-11 00:34:39,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-11 00:34:39,036 INFO L692 BuchiCegarLoop]: Abstraction has 557 states and 660 transitions. [2021-10-11 00:34:39,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states and 660 transitions. [2021-10-11 00:34:39,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 545. [2021-10-11 00:34:39,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 545 states. [2021-10-11 00:34:39,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 645 transitions. [2021-10-11 00:34:39,054 INFO L715 BuchiCegarLoop]: Abstraction has 545 states and 645 transitions. [2021-10-11 00:34:39,054 INFO L595 BuchiCegarLoop]: Abstraction has 545 states and 645 transitions. [2021-10-11 00:34:39,054 INFO L427 BuchiCegarLoop]: ======== Iteration 11============ [2021-10-11 00:34:39,055 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 545 states and 645 transitions. [2021-10-11 00:34:39,059 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 24 [2021-10-11 00:34:39,060 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-11 00:34:39,060 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-11 00:34:39,061 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [7, 7, 7, 6, 6, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:34:39,061 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:34:39,061 INFO L794 eck$LassoCheckResult]: Stem: 20810#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 20804#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 20784#L39 call main_#t~ret11 := fibo1(main_~x~0);< 20785#fibo1ENTRY ~n := #in~n; 20862#L10 assume !(~n < 1); 20860#L12 assume !(1 == ~n); 20857#L15 call #t~ret7 := fibo2(~n - 1);< 20858#fibo2ENTRY ~n := #in~n; 20872#L20 assume !(~n < 1); 20870#L22 assume !(1 == ~n); 20867#L25 call #t~ret9 := fibo1(~n - 1);< 20868#fibo1ENTRY ~n := #in~n; 20892#L10 assume !(~n < 1); 20890#L12 assume !(1 == ~n); 20888#L15 call #t~ret7 := fibo2(~n - 1);< 20889#fibo2ENTRY ~n := #in~n; 20950#L20 assume !(~n < 1); 20947#L22 assume !(1 == ~n); 20910#L25 call #t~ret9 := fibo1(~n - 1);< 20911#fibo1ENTRY ~n := #in~n; 21061#L10 assume !(~n < 1); 21059#L12 assume !(1 == ~n); 21052#L15 call #t~ret7 := fibo2(~n - 1);< 21053#fibo2ENTRY ~n := #in~n; 21074#L20 assume !(~n < 1); 21071#L22 assume !(1 == ~n); 21067#L25 call #t~ret9 := fibo1(~n - 1);< 21068#fibo1ENTRY ~n := #in~n; 21086#L10 assume !(~n < 1); 21084#L12 assume !(1 == ~n); 21080#L15 call #t~ret7 := fibo2(~n - 1);< 21081#fibo2ENTRY ~n := #in~n; 21087#L20 assume !(~n < 1); 21085#L22 assume 1 == ~n;#res := 1; 21083#fibo2FINAL assume true; 21079#fibo2EXIT >#50#return; 21076#L15-1 call #t~ret8 := fibo2(~n - 2);< 21077#fibo2ENTRY ~n := #in~n; 21082#L20 assume ~n < 1;#res := 0; 21078#fibo2FINAL assume true; 21075#fibo2EXIT >#52#return; 21073#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 21070#fibo1FINAL assume true; 21066#fibo1EXIT >#46#return; 21063#L25-1 call #t~ret10 := fibo1(~n - 2);< 21064#fibo1ENTRY ~n := #in~n; 21072#L10 assume !(~n < 1); 21069#L12 assume 1 == ~n;#res := 1; 21065#fibo1FINAL assume true; 21062#fibo1EXIT >#48#return; 21060#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 21058#fibo2FINAL assume true; 21051#fibo2EXIT >#50#return; 20931#L15-1 call #t~ret8 := fibo2(~n - 2);< 20935#fibo2ENTRY ~n := #in~n; 21007#L20 assume !(~n < 1); 20999#L22 assume !(1 == ~n); 20993#L25 call #t~ret9 := fibo1(~n - 1);< 20995#fibo1ENTRY ~n := #in~n; 21018#L10 assume !(~n < 1); 21015#L12 assume !(1 == ~n); 21011#L15 call #t~ret7 := fibo2(~n - 1);< 21013#fibo2ENTRY ~n := #in~n; 21048#L20 assume !(~n < 1); 21214#L22 assume !(1 == ~n); 21201#L25 call #t~ret9 := fibo1(~n - 1);< 21205#fibo1ENTRY ~n := #in~n; 21241#L10 assume !(~n < 1); 21235#L12 assume !(1 == ~n); 20755#L15 [2021-10-11 00:34:39,061 INFO L796 eck$LassoCheckResult]: Loop: 20755#L15 call #t~ret7 := fibo2(~n - 1);< 21228#fibo2ENTRY ~n := #in~n; 21230#L20 assume !(~n < 1); 21262#L22 assume !(1 == ~n); 21202#L25 call #t~ret9 := fibo1(~n - 1);< 21205#fibo1ENTRY ~n := #in~n; 21241#L10 assume !(~n < 1); 21235#L12 assume !(1 == ~n); 20755#L15 [2021-10-11 00:34:39,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:34:39,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1054902100, now seen corresponding path program 3 times [2021-10-11 00:34:39,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:34:39,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777899384] [2021-10-11 00:34:39,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:34:39,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:39,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-10-11 00:34:39,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:39,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-11 00:34:39,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:39,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-11 00:34:39,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:39,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-11 00:34:39,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:39,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-10-11 00:34:39,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:39,302 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 92 proven. 39 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-11 00:34:39,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777899384] [2021-10-11 00:34:39,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404693167] [2021-10-11 00:34:39,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:34:39,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-11 00:34:39,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:34:39,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-11 00:34:39,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:34:39,609 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 87 proven. 12 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-10-11 00:34:39,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:34:39,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 25 [2021-10-11 00:34:39,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872809858] [2021-10-11 00:34:39,611 INFO L799 eck$LassoCheckResult]: stem already infeasible [2021-10-11 00:34:39,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:34:39,611 INFO L82 PathProgramCache]: Analyzing trace with hash 519237434, now seen corresponding path program 4 times [2021-10-11 00:34:39,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:34:39,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987191012] [2021-10-11 00:34:39,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:34:39,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:34:39,615 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:34:39,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:34:39,617 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:34:39,618 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-11 00:34:39,803 INFO L210 LassoAnalysis]: Preferences: [2021-10-11 00:34:39,804 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-11 00:34:39,804 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-11 00:34:39,804 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-11 00:34:39,804 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-11 00:34:39,804 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:39,804 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-11 00:34:39,805 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-11 00:34:39,805 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration11_Loop [2021-10-11 00:34:39,805 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-11 00:34:39,805 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2021-10-11 00:34:39,806 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:39,809 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:39,813 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:39,816 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:39,829 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:39,832 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:39,834 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:39,837 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:39,839 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:39,921 INFO L292 LassoAnalysis]: Preprocessing complete. [2021-10-11 00:34:39,921 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 82 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:39,924 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-11 00:34:39,924 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-11 00:34:39,928 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-11 00:34:39,929 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret8=0} Honda state: {fibo1_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 83 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:39,953 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-11 00:34:39,953 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-11 00:34:39,955 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-11 00:34:39,955 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret10=0} Honda state: {fibo2_#t~ret10=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 84 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:39,978 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-11 00:34:39,979 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-11 00:34:39,981 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-11 00:34:39,981 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret9=0} Honda state: {fibo2_#t~ret9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 85 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:40,004 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-11 00:34:40,004 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 86 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:40,031 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-11 00:34:40,031 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-11 00:34:44,067 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-11 00:34:44,069 INFO L210 LassoAnalysis]: Preferences: [2021-10-11 00:34:44,069 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-11 00:34:44,069 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-11 00:34:44,069 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-11 00:34:44,069 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-11 00:34:44,069 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:44,069 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-11 00:34:44,070 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-11 00:34:44,070 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration11_Loop [2021-10-11 00:34:44,070 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-11 00:34:44,070 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2021-10-11 00:34:44,071 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:44,075 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:44,078 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:44,081 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:44,084 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:44,104 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:44,108 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:44,111 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:44,115 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-11 00:34:44,188 INFO L292 LassoAnalysis]: Preprocessing complete. [2021-10-11 00:34:44,189 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 87 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:44,221 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2021-10-11 00:34:44,223 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-11 00:34:44,223 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-11 00:34:44,223 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-11 00:34:44,223 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-11 00:34:44,223 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-11 00:34:44,224 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-11 00:34:44,224 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-11 00:34:44,240 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 88 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:34:44,279 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2021-10-11 00:34:44,281 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-11 00:34:44,281 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-11 00:34:44,281 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-11 00:34:44,281 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-11 00:34:44,281 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-11 00:34:44,282 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-11 00:34:44,282 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 88 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:44,292 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 89 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-11 00:34:44,333 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2021-10-11 00:34:44,335 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-11 00:34:44,335 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-11 00:34:44,335 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-11 00:34:44,336 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-11 00:34:44,336 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-11 00:34:44,337 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-11 00:34:44,337 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 89 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:44,348 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 90 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:44,382 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2021-10-11 00:34:44,383 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-11 00:34:44,383 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-11 00:34:44,384 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-11 00:34:44,384 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-11 00:34:44,384 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-11 00:34:44,384 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-11 00:34:44,384 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-11 00:34:44,385 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 91 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:44,408 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2021-10-11 00:34:44,410 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-11 00:34:44,410 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-11 00:34:44,410 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-11 00:34:44,410 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-11 00:34:44,410 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-11 00:34:44,413 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-11 00:34:44,413 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-11 00:34:44,422 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-11 00:34:44,426 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-11 00:34:44,426 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3834cc00-6473-4020-ad17-50369fd63d18/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 92 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-11 00:34:44,428 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-11 00:34:44,428 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-11 00:34:44,428 INFO L510 LassoAnalysis]: Proved termination. [2021-10-11 00:34:44,428 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] [2021-10-11 00:34:44,450 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-11 00:34:44,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:34:44,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:44,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-11 00:34:44,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:34:44,666 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:44,675 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:44,681 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:44,692 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:44,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:44,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-11 00:34:44,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:34:44,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:34:44,814 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 [2021-10-11 00:34:44,814 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 545 states and 645 transitions. cyclomatic complexity: 105 Second operand 8 states. [2021-10-11 00:34:44,955 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 545 states and 645 transitions. cyclomatic complexity: 105. Second operand 8 states. Result 576 states and 676 transitions. Complement of second has 19 states. [2021-10-11 00:34:44,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2021-10-11 00:34:44,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-11 00:34:44,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 20 transitions. [2021-10-11 00:34:44,957 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 20 transitions. Stem has 69 letters. Loop has 8 letters. [2021-10-11 00:34:44,957 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-11 00:34:44,957 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-11 00:34:44,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:34:45,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:45,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-11 00:34:45,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:34:45,153 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:45,162 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:45,168 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:45,178 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:45,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:45,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-11 00:34:45,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:34:45,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:34:45,332 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 6 loop predicates [2021-10-11 00:34:45,332 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 545 states and 645 transitions. cyclomatic complexity: 105 Second operand 8 states. [2021-10-11 00:34:45,483 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 545 states and 645 transitions. cyclomatic complexity: 105. Second operand 8 states. Result 576 states and 676 transitions. Complement of second has 21 states. [2021-10-11 00:34:45,488 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 [2021-10-11 00:34:45,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-11 00:34:45,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 19 transitions. [2021-10-11 00:34:45,489 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 19 transitions. Stem has 69 letters. Loop has 8 letters. [2021-10-11 00:34:45,490 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-11 00:34:45,490 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-11 00:34:45,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:34:45,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:45,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-11 00:34:45,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:34:45,689 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:45,700 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:45,707 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:45,717 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 00:34:45,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:34:45,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-11 00:34:45,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:34:45,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:34:45,842 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2021-10-11 00:34:45,842 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 545 states and 645 transitions. cyclomatic complexity: 105 Second operand 8 states. [2021-10-11 00:34:46,055 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 545 states and 645 transitions. cyclomatic complexity: 105. Second operand 8 states. Result 1226 states and 1461 transitions. Complement of second has 33 states. [2021-10-11 00:34:46,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2021-10-11 00:34:46,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-11 00:34:46,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 43 transitions. [2021-10-11 00:34:46,057 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 69 letters. Loop has 8 letters. [2021-10-11 00:34:46,058 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-11 00:34:46,058 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 77 letters. Loop has 8 letters. [2021-10-11 00:34:46,059 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-11 00:34:46,059 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 69 letters. Loop has 16 letters. [2021-10-11 00:34:46,060 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-11 00:34:46,060 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1226 states and 1461 transitions. [2021-10-11 00:34:46,075 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-11 00:34:46,075 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1226 states to 0 states and 0 transitions. [2021-10-11 00:34:46,076 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-10-11 00:34:46,076 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-10-11 00:34:46,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-10-11 00:34:46,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-11 00:34:46,076 INFO L692 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 00:34:46,076 INFO L715 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 00:34:46,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:34:46,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-11 00:34:46,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-10-11 00:34:46,078 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 25 states. [2021-10-11 00:34:46,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:34:46,078 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2021-10-11 00:34:46,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 00:34:46,078 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2021-10-11 00:34:46,078 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-11 00:34:46,079 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 00:34:46,079 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-10-11 00:34:46,079 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-10-11 00:34:46,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-10-11 00:34:46,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-11 00:34:46,079 INFO L692 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 00:34:46,079 INFO L715 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 00:34:46,079 INFO L595 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 00:34:46,080 INFO L427 BuchiCegarLoop]: ======== Iteration 12============ [2021-10-11 00:34:46,080 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-10-11 00:34:46,080 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-11 00:34:46,080 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-10-11 00:34:46,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 11.10 12:34:46 BoogieIcfgContainer [2021-10-11 00:34:46,087 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-10-11 00:34:46,088 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 00:34:46,088 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 00:34:46,088 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 00:34:46,089 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:34:09" (3/4) ... [2021-10-11 00:34:46,093 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-11 00:34:46,093 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 00:34:46,095 INFO L168 Benchmark]: Toolchain (without parser) took 37135.07 ms. Allocated memory was 98.6 MB in the beginning and 318.8 MB in the end (delta: 220.2 MB). Free memory was 69.6 MB in the beginning and 162.9 MB in the end (delta: -93.4 MB). Peak memory consumption was 127.0 MB. Max. memory is 16.1 GB. [2021-10-11 00:34:46,096 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 98.6 MB. Free memory was 52.1 MB in the beginning and 52.1 MB in the end (delta: 44.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:34:46,097 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.59 ms. Allocated memory was 98.6 MB in the beginning and 125.8 MB in the end (delta: 27.3 MB). Free memory was 69.2 MB in the beginning and 103.0 MB in the end (delta: -33.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-11 00:34:46,097 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.80 ms. Allocated memory is still 125.8 MB. Free memory was 103.0 MB in the beginning and 102.0 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:34:46,101 INFO L168 Benchmark]: Boogie Preprocessor took 25.24 ms. Allocated memory is still 125.8 MB. Free memory was 102.0 MB in the beginning and 100.9 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:34:46,101 INFO L168 Benchmark]: RCFGBuilder took 375.60 ms. Allocated memory is still 125.8 MB. Free memory was 100.9 MB in the beginning and 88.3 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-11 00:34:46,102 INFO L168 Benchmark]: BuchiAutomizer took 36386.94 ms. Allocated memory was 125.8 MB in the beginning and 318.8 MB in the end (delta: 192.9 MB). Free memory was 87.8 MB in the beginning and 164.0 MB in the end (delta: -76.2 MB). Peak memory consumption was 117.3 MB. Max. memory is 16.1 GB. [2021-10-11 00:34:46,102 INFO L168 Benchmark]: Witness Printer took 5.50 ms. Allocated memory is still 318.8 MB. Free memory was 164.0 MB in the beginning and 162.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:34:46,105 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 98.6 MB. Free memory was 52.1 MB in the beginning and 52.1 MB in the end (delta: 44.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 281.59 ms. Allocated memory was 98.6 MB in the beginning and 125.8 MB in the end (delta: 27.3 MB). Free memory was 69.2 MB in the beginning and 103.0 MB in the end (delta: -33.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.80 ms. Allocated memory is still 125.8 MB. Free memory was 103.0 MB in the beginning and 102.0 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.24 ms. Allocated memory is still 125.8 MB. Free memory was 102.0 MB in the beginning and 100.9 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 375.60 ms. Allocated memory is still 125.8 MB. Free memory was 100.9 MB in the beginning and 88.3 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 36386.94 ms. Allocated memory was 125.8 MB in the beginning and 318.8 MB in the end (delta: 192.9 MB). Free memory was 87.8 MB in the beginning and 164.0 MB in the end (delta: -76.2 MB). Peak memory consumption was 117.3 MB. Max. memory is 16.1 GB. * Witness Printer took 5.50 ms. Allocated memory is still 318.8 MB. Free memory was 164.0 MB in the beginning and 162.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 17 terminating modules (10 trivial, 3 deterministic, 4 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 7 locations. One deterministic module has affine ranking function n and consists of 12 locations. One deterministic module has affine ranking function n and consists of 13 locations. One nondeterministic module has affine ranking function \old(n) and consists of 8 locations. One nondeterministic module has affine ranking function n and consists of 12 locations. One nondeterministic module has affine ranking function \old(n) and consists of 8 locations. One nondeterministic module has affine ranking function n and consists of 8 locations. 10 modules have a trivial ranking function, the largest among these consists of 25 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 36.3s and 12 iterations. TraceHistogramMax:8. Analysis of lassos took 19.8s. Construction of modules took 4.0s. Büchi inclusion checks took 11.3s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 15. Automata minimization 0.3s AutomataMinimizationTime, 15 MinimizatonAttempts, 375 StatesRemovedByMinimization, 15 NontrivialMinimizations. Non-live state removal took 0.3s Buchi closure took 0.0s. Biggest automaton had 545 states and ocurred in iteration 10. Nontrivial modules had stage [3, 0, 4, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 1/19 HoareTripleCheckerStatistics: 524 SDtfs, 1394 SDslu, 1803 SDs, 0 SdLazy, 4145 SolverSat, 844 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.0s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI4 SILT6 lasso0 LassoPreprocessingBenchmarks: Lassos: inital19 mio100 ax100 hnf91 lsp92 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq184 hnf93 smp75 dnf100 smp100 tf110 neg96 sie108 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 32ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 25 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 7 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 7.4s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...