./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_5-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_5-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be --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 2199d5dae92fc703178378f6dd7dec10a5f129181c51bc9a88c002f6d4f76a67 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 20:21:38,152 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 20:21:38,155 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 20:21:38,186 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 20:21:38,186 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 20:21:38,188 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 20:21:38,190 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 20:21:38,192 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 20:21:38,194 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 20:21:38,195 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 20:21:38,196 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 20:21:38,198 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 20:21:38,198 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 20:21:38,200 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 20:21:38,201 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 20:21:38,203 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 20:21:38,204 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 20:21:38,206 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 20:21:38,208 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 20:21:38,210 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 20:21:38,212 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 20:21:38,214 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 20:21:38,216 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 20:21:38,217 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 20:21:38,220 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 20:21:38,221 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 20:21:38,221 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 20:21:38,223 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 20:21:38,223 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 20:21:38,224 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 20:21:38,225 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 20:21:38,226 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 20:21:38,227 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 20:21:38,228 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 20:21:38,229 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 20:21:38,230 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 20:21:38,230 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 20:21:38,231 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 20:21:38,231 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 20:21:38,232 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 20:21:38,233 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 20:21:38,234 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-10-21 20:21:38,261 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 20:21:38,261 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 20:21:38,262 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 20:21:38,262 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 20:21:38,263 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 20:21:38,263 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 20:21:38,264 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 20:21:38,264 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-10-21 20:21:38,264 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-10-21 20:21:38,265 INFO L138 SettingsManager]: * Use old map elimination=false [2021-10-21 20:21:38,265 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-10-21 20:21:38,265 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-10-21 20:21:38,265 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-10-21 20:21:38,266 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 20:21:38,266 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 20:21:38,266 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 20:21:38,266 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 20:21:38,267 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 20:21:38,267 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 20:21:38,267 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-10-21 20:21:38,268 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-10-21 20:21:38,268 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-10-21 20:21:38,268 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 20:21:38,268 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 20:21:38,269 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-10-21 20:21:38,269 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 20:21:38,269 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-10-21 20:21:38,270 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 20:21:38,270 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 20:21:38,270 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 20:21:38,271 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 20:21:38,271 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 20:21:38,272 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-10-21 20:21:38,272 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_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2199d5dae92fc703178378f6dd7dec10a5f129181c51bc9a88c002f6d4f76a67 [2021-10-21 20:21:38,539 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 20:21:38,561 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 20:21:38,564 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 20:21:38,565 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 20:21:38,569 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 20:21:38,570 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/recursive-simple/fibo_5-1.c [2021-10-21 20:21:38,655 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/data/3b1f9f366/f36cb9e8cffd4d46a4c67b491932f194/FLAGae70e668d [2021-10-21 20:21:39,170 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 20:21:39,171 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/sv-benchmarks/c/recursive-simple/fibo_5-1.c [2021-10-21 20:21:39,179 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/data/3b1f9f366/f36cb9e8cffd4d46a4c67b491932f194/FLAGae70e668d [2021-10-21 20:21:39,576 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/data/3b1f9f366/f36cb9e8cffd4d46a4c67b491932f194 [2021-10-21 20:21:39,579 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 20:21:39,581 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 20:21:39,583 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 20:21:39,583 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 20:21:39,602 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 20:21:39,602 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:21:39" (1/1) ... [2021-10-21 20:21:39,604 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f4d9ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:21:39, skipping insertion in model container [2021-10-21 20:21:39,605 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:21:39" (1/1) ... [2021-10-21 20:21:39,613 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 20:21:39,628 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 20:21:39,804 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/sv-benchmarks/c/recursive-simple/fibo_5-1.c[740,753] [2021-10-21 20:21:39,804 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:21:39,813 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 20:21:39,828 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/sv-benchmarks/c/recursive-simple/fibo_5-1.c[740,753] [2021-10-21 20:21:39,829 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:21:39,847 INFO L208 MainTranslator]: Completed translation [2021-10-21 20:21:39,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:21:39 WrapperNode [2021-10-21 20:21:39,847 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 20:21:39,848 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 20:21:39,848 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 20:21:39,849 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 20:21:39,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:21:39" (1/1) ... [2021-10-21 20:21:39,860 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:21:39" (1/1) ... [2021-10-21 20:21:39,877 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 20:21:39,877 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 20:21:39,878 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 20:21:39,878 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 20:21:39,886 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:21:39" (1/1) ... [2021-10-21 20:21:39,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:21:39" (1/1) ... [2021-10-21 20:21:39,888 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:21:39" (1/1) ... [2021-10-21 20:21:39,888 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:21:39" (1/1) ... [2021-10-21 20:21:39,891 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:21:39" (1/1) ... [2021-10-21 20:21:39,893 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:21:39" (1/1) ... [2021-10-21 20:21:39,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:21:39" (1/1) ... [2021-10-21 20:21:39,895 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 20:21:39,896 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 20:21:39,897 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 20:21:39,897 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 20:21:39,904 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:21:39" (1/1) ... [2021-10-21 20:21:39,911 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:39,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:39,948 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:39,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-10-21 20:21:39,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 20:21:39,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 20:21:39,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 20:21:39,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 20:21:39,986 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2021-10-21 20:21:39,987 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2021-10-21 20:21:40,175 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 20:21:40,175 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-21 20:21:40,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:21:40 BoogieIcfgContainer [2021-10-21 20:21:40,176 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 20:21:40,178 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-10-21 20:21:40,178 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-10-21 20:21:40,181 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-10-21 20:21:40,182 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-21 20:21:40,182 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 21.10 08:21:39" (1/3) ... [2021-10-21 20:21:40,184 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@230ffb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 21.10 08:21:40, skipping insertion in model container [2021-10-21 20:21:40,184 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-21 20:21:40,184 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:21:39" (2/3) ... [2021-10-21 20:21:40,184 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@230ffb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 21.10 08:21:40, skipping insertion in model container [2021-10-21 20:21:40,184 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-21 20:21:40,185 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:21:40" (3/3) ... [2021-10-21 20:21:40,186 INFO L389 chiAutomizerObserver]: Analyzing ICFG fibo_5-1.c [2021-10-21 20:21:40,233 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-10-21 20:21:40,233 INFO L360 BuchiCegarLoop]: Hoare is false [2021-10-21 20:21:40,233 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-10-21 20:21:40,233 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-21 20:21:40,233 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-21 20:21:40,234 INFO L364 BuchiCegarLoop]: Difference is false [2021-10-21 20:21:40,234 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-21 20:21:40,234 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-10-21 20:21:40,247 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 20:21:40,267 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-21 20:21:40,268 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 20:21:40,268 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 20:21:40,274 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-10-21 20:21:40,274 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-21 20:21:40,274 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-10-21 20:21:40,274 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 20:21:40,277 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-21 20:21:40,277 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 20:21:40,277 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 20:21:40,278 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-10-21 20:21:40,278 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-21 20:21:40,283 INFO L791 eck$LassoCheckResult]: Stem: 4#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(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 13#L-1true havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 6#L27true call main_#t~ret9 := fibo(main_~x~0);< 7#fiboENTRYtrue [2021-10-21 20:21:40,283 INFO L793 eck$LassoCheckResult]: Loop: 7#fiboENTRYtrue ~n := #in~n; 8#L8true assume !(~n < 1); 10#L10true assume !(1 == ~n); 15#L13true call #t~ret7 := fibo(~n - 1);< 7#fiboENTRYtrue [2021-10-21 20:21:40,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:40,289 INFO L82 PathProgramCache]: Analyzing trace with hash 29883, now seen corresponding path program 1 times [2021-10-21 20:21:40,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:40,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714213149] [2021-10-21 20:21:40,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:40,299 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:40,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:40,389 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:21:40,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:40,426 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:21:40,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:40,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1450956, now seen corresponding path program 1 times [2021-10-21 20:21:40,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:40,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685403041] [2021-10-21 20:21:40,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:40,431 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:40,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:40,437 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:21:40,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:40,443 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:21:40,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:40,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1828301702, now seen corresponding path program 1 times [2021-10-21 20:21:40,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:40,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922858521] [2021-10-21 20:21:40,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:40,446 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:40,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:40,464 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:21:40,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:40,486 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:21:40,711 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 20:21:40,712 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 20:21:40,712 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 20:21:40,712 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 20:21:40,712 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-21 20:21:40,712 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:40,712 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 20:21:40,713 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 20:21:40,713 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration1_Loop [2021-10-21 20:21:40,713 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 20:21:40,713 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 20:21:40,729 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:40,735 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:40,738 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:40,741 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:40,744 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:40,810 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 20:21:40,811 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-21 20:21:40,813 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:40,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:40,815 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:40,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-10-21 20:21:40,859 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 20:21:40,859 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 20:21:40,886 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 20:21:40,886 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-21 20:21:40,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:40,924 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:40,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:40,926 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:40,932 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 20:21:40,932 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 20:21:40,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-10-21 20:21:40,956 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 20:21:40,956 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-21 20:21:40,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:40,992 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:40,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:40,994 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:40,999 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 20:21:41,000 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 20:21:41,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-10-21 20:21:41,020 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 20:21:41,020 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-21 20:21:41,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:41,057 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:41,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:41,059 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:41,067 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 20:21:41,067 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 20:21:41,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-10-21 20:21:41,091 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 20:21:41,092 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-21 20:21:41,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:41,129 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:41,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:41,131 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:41,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-10-21 20:21:41,137 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 20:21:41,139 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 20:21:41,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:41,183 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:41,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:41,185 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:41,208 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-21 20:21:41,208 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 20:21:41,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-10-21 20:21:41,327 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-21 20:21:41,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:41,334 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 20:21:41,334 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 20:21:41,334 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 20:21:41,334 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 20:21:41,334 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-21 20:21:41,334 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:41,335 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 20:21:41,335 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 20:21:41,335 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration1_Loop [2021-10-21 20:21:41,335 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 20:21:41,335 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 20:21:41,337 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:41,341 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:41,343 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:41,346 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:41,349 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:41,413 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 20:21:41,425 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-21 20:21:41,427 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:41,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:41,428 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:41,432 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 20:21:41,442 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 20:21:41,442 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 20:21:41,443 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 20:21:41,443 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 20:21:41,443 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 20:21:41,445 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 20:21:41,445 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 20:21:41,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-10-21 20:21:41,458 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 20:21:41,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Ended with exit code 0 [2021-10-21 20:21:41,490 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:41,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:41,491 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:41,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-10-21 20:21:41,492 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 20:21:41,500 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 20:21:41,500 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 20:21:41,500 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 20:21:41,500 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 20:21:41,500 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 20:21:41,502 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 20:21:41,502 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 20:21:41,517 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 20:21:41,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:41,542 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:41,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:41,544 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:41,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-10-21 20:21:41,545 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 20:21:41,553 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 20:21:41,553 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 20:21:41,553 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 20:21:41,553 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 20:21:41,553 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 20:21:41,554 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 20:21:41,554 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 20:21:41,591 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 20:21:41,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:41,628 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:41,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:41,629 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:41,639 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 20:21:41,649 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 20:21:41,649 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 20:21:41,649 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 20:21:41,649 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 20:21:41,649 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 20:21:41,650 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 20:21:41,650 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 20:21:41,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-10-21 20:21:41,663 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 20:21:41,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:41,700 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:41,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:41,701 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:41,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-10-21 20:21:41,708 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 20:21:41,716 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 20:21:41,716 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 20:21:41,716 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 20:21:41,716 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 20:21:41,716 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 20:21:41,717 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 20:21:41,718 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 20:21:41,729 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-21 20:21:41,736 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-21 20:21:41,736 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-21 20:21:41,737 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:41,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:41,742 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:41,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-10-21 20:21:41,784 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-21 20:21:41,799 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-21 20:21:41,799 INFO L513 LassoAnalysis]: Proved termination. [2021-10-21 20:21:41,800 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2021-10-21 20:21:41,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:41,834 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-21 20:21:41,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:41,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:41,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 20:21:41,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:41,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:41,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 20:21:41,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:42,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:21:42,098 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2021-10-21 20:21:42,099 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:21:42,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:42,212 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3). Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 48 states and 60 transitions. Complement of second has 12 states. [2021-10-21 20:21:42,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-10-21 20:21:42,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:21:42,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2021-10-21 20:21:42,226 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2021-10-21 20:21:42,228 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:21:42,228 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2021-10-21 20:21:42,229 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:21:42,229 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2021-10-21 20:21:42,230 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:21:42,230 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 48 states and 60 transitions. [2021-10-21 20:21:42,235 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-21 20:21:42,248 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 48 states to 25 states and 34 transitions. [2021-10-21 20:21:42,249 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2021-10-21 20:21:42,250 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2021-10-21 20:21:42,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2021-10-21 20:21:42,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 20:21:42,251 INFO L681 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-10-21 20:21:42,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2021-10-21 20:21:42,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2021-10-21 20:21:42,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-21 20:21:42,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2021-10-21 20:21:42,286 INFO L704 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-10-21 20:21:42,286 INFO L587 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-10-21 20:21:42,286 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-10-21 20:21:42,286 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2021-10-21 20:21:42,291 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-21 20:21:42,291 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 20:21:42,291 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 20:21:42,292 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:21:42,293 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:21:42,293 INFO L791 eck$LassoCheckResult]: Stem: 122#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(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 123#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 128#L27 call main_#t~ret9 := fibo(main_~x~0);< 132#fiboENTRY ~n := #in~n; 133#L8 assume !(~n < 1); 138#L10 assume !(1 == ~n); 127#L13 call #t~ret7 := fibo(~n - 1);< 129#fiboENTRY ~n := #in~n; 134#L8 assume ~n < 1;#res := 0; 135#fiboFINAL assume true; 136#fiboEXIT >#33#return; 125#L13-1 [2021-10-21 20:21:42,293 INFO L793 eck$LassoCheckResult]: Loop: 125#L13-1 call #t~ret8 := fibo(~n - 2);< 126#fiboENTRY ~n := #in~n; 141#L8 assume !(~n < 1); 140#L10 assume !(1 == ~n); 124#L13 call #t~ret7 := fibo(~n - 1);< 126#fiboENTRY ~n := #in~n; 141#L8 assume ~n < 1;#res := 0; 131#fiboFINAL assume true; 139#fiboEXIT >#33#return; 125#L13-1 [2021-10-21 20:21:42,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:42,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1181449843, now seen corresponding path program 1 times [2021-10-21 20:21:42,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:42,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240552419] [2021-10-21 20:21:42,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:42,296 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:42,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:42,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 20:21:42,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:42,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 20:21:42,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:21:42,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240552419] [2021-10-21 20:21:42,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240552419] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:21:42,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:21:42,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 20:21:42,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787734025] [2021-10-21 20:21:42,433 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 20:21:42,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:42,434 INFO L82 PathProgramCache]: Analyzing trace with hash 246097683, now seen corresponding path program 1 times [2021-10-21 20:21:42,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:42,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843154118] [2021-10-21 20:21:42,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:42,435 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:42,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:42,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-10-21 20:21:42,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:42,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 20:21:42,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:21:42,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843154118] [2021-10-21 20:21:42,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843154118] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:21:42,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:21:42,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 20:21:42,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580164443] [2021-10-21 20:21:42,488 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-21 20:21:42,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:21:42,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:21:42,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:21:42,493 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. cyclomatic complexity: 8 Second operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:21:42,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:21:42,563 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-10-21 20:21:42,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:21:42,564 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2021-10-21 20:21:42,566 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-21 20:21:42,568 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2021-10-21 20:21:42,568 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2021-10-21 20:21:42,568 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2021-10-21 20:21:42,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2021-10-21 20:21:42,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 20:21:42,569 INFO L681 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-10-21 20:21:42,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2021-10-21 20:21:42,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-21 20:21:42,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-21 20:21:42,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-10-21 20:21:42,573 INFO L704 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-10-21 20:21:42,574 INFO L587 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-10-21 20:21:42,574 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-10-21 20:21:42,574 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2021-10-21 20:21:42,575 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-21 20:21:42,575 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 20:21:42,575 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 20:21:42,576 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:21:42,576 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-10-21 20:21:42,576 INFO L791 eck$LassoCheckResult]: Stem: 195#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(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 196#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 201#L27 call main_#t~ret9 := fibo(main_~x~0);< 205#fiboENTRY ~n := #in~n; 207#L8 assume !(~n < 1); 211#L10 assume !(1 == ~n); 200#L13 call #t~ret7 := fibo(~n - 1);< 202#fiboENTRY ~n := #in~n; 208#L8 assume !(~n < 1); 210#L10 assume 1 == ~n;#res := 1; 212#fiboFINAL assume true; 214#fiboEXIT >#33#return; 198#L13-1 [2021-10-21 20:21:42,577 INFO L793 eck$LassoCheckResult]: Loop: 198#L13-1 call #t~ret8 := fibo(~n - 2);< 199#fiboENTRY ~n := #in~n; 217#L8 assume !(~n < 1); 215#L10 assume !(1 == ~n); 197#L13 call #t~ret7 := fibo(~n - 1);< 199#fiboENTRY ~n := #in~n; 217#L8 assume !(~n < 1); 215#L10 assume 1 == ~n;#res := 1; 216#fiboFINAL assume true; 213#fiboEXIT >#33#return; 198#L13-1 [2021-10-21 20:21:42,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:42,577 INFO L82 PathProgramCache]: Analyzing trace with hash 2029785426, now seen corresponding path program 1 times [2021-10-21 20:21:42,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:42,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923256882] [2021-10-21 20:21:42,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:42,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:42,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:42,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 20:21:42,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:42,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:21:42,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:21:42,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923256882] [2021-10-21 20:21:42,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923256882] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:21:42,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912476319] [2021-10-21 20:21:42,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:42,646 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:21:42,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:42,657 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:21:42,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-21 20:21:42,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:42,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 20:21:42,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:42,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:21:42,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912476319] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:21:42,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:21:42,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-21 20:21:42,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276289775] [2021-10-21 20:21:42,800 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 20:21:42,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:42,801 INFO L82 PathProgramCache]: Analyzing trace with hash -960881524, now seen corresponding path program 1 times [2021-10-21 20:21:42,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:42,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842655746] [2021-10-21 20:21:42,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:42,802 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:42,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:42,808 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:21:42,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:42,819 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:21:43,015 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 20:21:43,016 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 20:21:43,016 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 20:21:43,016 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 20:21:43,016 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-21 20:21:43,016 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:43,016 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 20:21:43,016 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 20:21:43,016 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration3_Loop [2021-10-21 20:21:43,017 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 20:21:43,017 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 20:21:43,018 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:43,020 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:43,042 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:43,045 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:43,089 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 20:21:43,089 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-21 20:21:43,089 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:43,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:43,104 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:43,112 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 20:21:43,112 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 20:21:43,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-10-21 20:21:43,126 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 20:21:43,126 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-21 20:21:43,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:43,156 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:43,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:43,157 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:43,163 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 20:21:43,163 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 20:21:43,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-10-21 20:21:43,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:43,210 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:43,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:43,211 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:43,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-10-21 20:21:43,216 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-21 20:21:43,216 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 20:21:44,322 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-21 20:21:44,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:44,326 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 20:21:44,326 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 20:21:44,326 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 20:21:44,326 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 20:21:44,327 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-21 20:21:44,327 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:44,327 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 20:21:44,327 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 20:21:44,327 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration3_Loop [2021-10-21 20:21:44,327 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 20:21:44,327 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 20:21:44,328 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:44,340 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:44,348 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:44,351 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:44,395 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 20:21:44,395 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-21 20:21:44,395 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:44,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:44,396 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:44,411 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 20:21:44,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-10-21 20:21:44,420 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 20:21:44,421 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 20:21:44,421 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 20:21:44,421 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 20:21:44,421 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 20:21:44,422 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 20:21:44,422 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 20:21:44,435 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 20:21:44,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:44,471 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:44,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:44,473 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:44,480 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 20:21:44,490 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 20:21:44,490 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 20:21:44,491 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 20:21:44,491 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 20:21:44,491 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 20:21:44,494 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 20:21:44,494 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 20:21:44,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-10-21 20:21:44,507 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-21 20:21:44,512 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-21 20:21:44,513 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-21 20:21:44,513 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:44,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:44,515 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:44,525 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-21 20:21:44,525 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-21 20:21:44,525 INFO L513 LassoAnalysis]: Proved termination. [2021-10-21 20:21:44,525 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2021-10-21 20:21:44,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-10-21 20:21:44,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:44,564 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-21 20:21:44,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:44,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:44,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 20:21:44,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:44,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:44,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 20:21:44,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:44,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:21:44,904 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 [2021-10-21 20:21:44,904 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8 Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:21:45,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:45,161 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Result 135 states and 183 transitions. Complement of second has 36 states. [2021-10-21 20:21:45,161 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 [2021-10-21 20:21:45,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:21:45,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2021-10-21 20:21:45,168 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 10 letters. [2021-10-21 20:21:45,174 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:21:45,175 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 22 letters. Loop has 10 letters. [2021-10-21 20:21:45,176 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:21:45,176 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 20 letters. [2021-10-21 20:21:45,178 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:21:45,179 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 183 transitions. [2021-10-21 20:21:45,195 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-10-21 20:21:45,204 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 108 states and 152 transitions. [2021-10-21 20:21:45,205 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 64 [2021-10-21 20:21:45,209 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2021-10-21 20:21:45,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 152 transitions. [2021-10-21 20:21:45,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 20:21:45,210 INFO L681 BuchiCegarLoop]: Abstraction has 108 states and 152 transitions. [2021-10-21 20:21:45,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states and 152 transitions. [2021-10-21 20:21:45,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2021-10-21 20:21:45,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 64 states have internal predecessors, (71), 21 states have call successors, (22), 11 states have call predecessors, (22), 15 states have return successors, (33), 18 states have call predecessors, (33), 19 states have call successors, (33) [2021-10-21 20:21:45,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2021-10-21 20:21:45,231 INFO L704 BuchiCegarLoop]: Abstraction has 94 states and 126 transitions. [2021-10-21 20:21:45,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:21:45,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 20:21:45,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:21:45,234 INFO L87 Difference]: Start difference. First operand 94 states and 126 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:21:45,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:21:45,316 INFO L93 Difference]: Finished difference Result 109 states and 147 transitions. [2021-10-21 20:21:45,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:21:45,317 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 109 states and 147 transitions. [2021-10-21 20:21:45,329 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-10-21 20:21:45,336 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 109 states to 106 states and 144 transitions. [2021-10-21 20:21:45,338 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 69 [2021-10-21 20:21:45,340 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2021-10-21 20:21:45,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 144 transitions. [2021-10-21 20:21:45,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 20:21:45,340 INFO L681 BuchiCegarLoop]: Abstraction has 106 states and 144 transitions. [2021-10-21 20:21:45,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states and 144 transitions. [2021-10-21 20:21:45,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2021-10-21 20:21:45,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 64 states have internal predecessors, (71), 21 states have call successors, (22), 11 states have call predecessors, (22), 15 states have return successors, (32), 18 states have call predecessors, (32), 19 states have call successors, (32) [2021-10-21 20:21:45,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 125 transitions. [2021-10-21 20:21:45,361 INFO L704 BuchiCegarLoop]: Abstraction has 94 states and 125 transitions. [2021-10-21 20:21:45,361 INFO L587 BuchiCegarLoop]: Abstraction has 94 states and 125 transitions. [2021-10-21 20:21:45,361 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-10-21 20:21:45,361 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 94 states and 125 transitions. [2021-10-21 20:21:45,364 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-10-21 20:21:45,364 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 20:21:45,365 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 20:21:45,369 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:21:45,369 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2021-10-21 20:21:45,370 INFO L791 eck$LassoCheckResult]: Stem: 736#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 737#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 743#L27 call main_#t~ret9 := fibo(main_~x~0);< 754#fiboENTRY ~n := #in~n; 798#L8 assume !(~n < 1); 778#L10 assume !(1 == ~n); 742#L13 call #t~ret7 := fibo(~n - 1);< 744#fiboENTRY ~n := #in~n; 759#L8 assume !(~n < 1); 775#L10 assume !(1 == ~n); 758#L13 call #t~ret7 := fibo(~n - 1);< 744#fiboENTRY ~n := #in~n; 759#L8 assume !(~n < 1); 775#L10 assume !(1 == ~n); 758#L13 call #t~ret7 := fibo(~n - 1);< 744#fiboENTRY ~n := #in~n; 760#L8 assume !(~n < 1); 797#L10 assume 1 == ~n;#res := 1; 796#fiboFINAL assume true; 795#fiboEXIT >#33#return; 756#L13-1 call #t~ret8 := fibo(~n - 2);< 755#fiboENTRY ~n := #in~n; 757#L8 assume ~n < 1;#res := 0; 774#fiboFINAL assume true; 825#fiboEXIT >#35#return; 821#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 819#fiboFINAL assume true; 817#fiboEXIT >#33#return; 739#L13-1 [2021-10-21 20:21:45,370 INFO L793 eck$LassoCheckResult]: Loop: 739#L13-1 call #t~ret8 := fibo(~n - 2);< 741#fiboENTRY ~n := #in~n; 799#L8 assume !(~n < 1); 776#L10 assume !(1 == ~n); 738#L13 call #t~ret7 := fibo(~n - 1);< 741#fiboENTRY ~n := #in~n; 799#L8 assume !(~n < 1); 776#L10 assume !(1 == ~n); 738#L13 call #t~ret7 := fibo(~n - 1);< 741#fiboENTRY ~n := #in~n; 799#L8 assume !(~n < 1); 776#L10 assume 1 == ~n;#res := 1; 777#fiboFINAL assume true; 815#fiboEXIT >#33#return; 739#L13-1 call #t~ret8 := fibo(~n - 2);< 741#fiboENTRY ~n := #in~n; 799#L8 assume !(~n < 1); 776#L10 assume !(1 == ~n); 738#L13 call #t~ret7 := fibo(~n - 1);< 741#fiboENTRY ~n := #in~n; 799#L8 assume !(~n < 1); 776#L10 assume 1 == ~n;#res := 1; 777#fiboFINAL assume true; 815#fiboEXIT >#33#return; 739#L13-1 call #t~ret8 := fibo(~n - 2);< 741#fiboENTRY ~n := #in~n; 799#L8 assume ~n < 1;#res := 0; 800#fiboFINAL assume true; 824#fiboEXIT >#35#return; 816#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 820#fiboFINAL assume true; 818#fiboEXIT >#35#return; 816#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 820#fiboFINAL assume true; 818#fiboEXIT >#33#return; 739#L13-1 [2021-10-21 20:21:45,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:45,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1557778097, now seen corresponding path program 1 times [2021-10-21 20:21:45,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:45,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131233256] [2021-10-21 20:21:45,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:45,372 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:45,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:45,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-21 20:21:45,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:45,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 20:21:45,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:45,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 20:21:45,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:45,581 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-21 20:21:45,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:21:45,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131233256] [2021-10-21 20:21:45,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131233256] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:21:45,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769900628] [2021-10-21 20:21:45,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:45,582 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:21:45,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:45,588 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:21:45,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-21 20:21:45,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:45,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-21 20:21:45,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:45,801 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-21 20:21:45,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769900628] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:21:45,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:21:45,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-10-21 20:21:45,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277883680] [2021-10-21 20:21:45,802 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 20:21:45,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:45,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1616897917, now seen corresponding path program 1 times [2021-10-21 20:21:45,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:45,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090885562] [2021-10-21 20:21:45,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:45,803 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:45,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:45,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-10-21 20:21:45,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:45,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 20:21:45,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:45,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 20:21:45,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:45,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 20:21:45,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:45,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 20:21:45,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:45,945 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 26 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-21 20:21:45,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:21:45,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090885562] [2021-10-21 20:21:45,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090885562] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:21:45,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683413630] [2021-10-21 20:21:45,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:45,946 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:21:45,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:45,952 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:21:45,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-21 20:21:46,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:46,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 20:21:46,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:46,139 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-21 20:21:46,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683413630] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:21:46,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:21:46,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-10-21 20:21:46,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652584332] [2021-10-21 20:21:46,140 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-21 20:21:46,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:21:46,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 20:21:46,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-21 20:21:46,141 INFO L87 Difference]: Start difference. First operand 94 states and 125 transitions. cyclomatic complexity: 36 Second operand has 12 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-21 20:21:46,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:21:46,311 INFO L93 Difference]: Finished difference Result 116 states and 159 transitions. [2021-10-21 20:21:46,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 20:21:46,311 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 116 states and 159 transitions. [2021-10-21 20:21:46,314 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2021-10-21 20:21:46,317 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 116 states to 114 states and 157 transitions. [2021-10-21 20:21:46,317 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2021-10-21 20:21:46,318 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2021-10-21 20:21:46,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 114 states and 157 transitions. [2021-10-21 20:21:46,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 20:21:46,318 INFO L681 BuchiCegarLoop]: Abstraction has 114 states and 157 transitions. [2021-10-21 20:21:46,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states and 157 transitions. [2021-10-21 20:21:46,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-10-21 20:21:46,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 76 states have internal predecessors, (85), 26 states have call successors, (27), 13 states have call predecessors, (27), 18 states have return successors, (45), 24 states have call predecessors, (45), 24 states have call successors, (45) [2021-10-21 20:21:46,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 157 transitions. [2021-10-21 20:21:46,329 INFO L704 BuchiCegarLoop]: Abstraction has 114 states and 157 transitions. [2021-10-21 20:21:46,329 INFO L587 BuchiCegarLoop]: Abstraction has 114 states and 157 transitions. [2021-10-21 20:21:46,329 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-10-21 20:21:46,329 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 114 states and 157 transitions. [2021-10-21 20:21:46,331 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2021-10-21 20:21:46,331 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 20:21:46,331 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 20:21:46,333 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:21:46,333 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [8, 7, 6, 4, 4, 4, 4, 3, 3, 2, 2] [2021-10-21 20:21:46,333 INFO L791 eck$LassoCheckResult]: Stem: 1247#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 1248#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 1265#L27 call main_#t~ret9 := fibo(main_~x~0);< 1266#fiboENTRY ~n := #in~n; 1312#L8 assume !(~n < 1); 1311#L10 assume !(1 == ~n); 1254#L13 call #t~ret7 := fibo(~n - 1);< 1273#fiboENTRY ~n := #in~n; 1274#L8 assume !(~n < 1); 1284#L10 assume !(1 == ~n); 1253#L13 call #t~ret7 := fibo(~n - 1);< 1255#fiboENTRY ~n := #in~n; 1309#L8 assume !(~n < 1); 1307#L10 assume !(1 == ~n); 1257#L13 call #t~ret7 := fibo(~n - 1);< 1255#fiboENTRY ~n := #in~n; 1309#L8 assume !(~n < 1); 1307#L10 assume !(1 == ~n); 1257#L13 call #t~ret7 := fibo(~n - 1);< 1255#fiboENTRY ~n := #in~n; 1310#L8 assume !(~n < 1); 1308#L10 assume 1 == ~n;#res := 1; 1306#fiboFINAL assume true; 1305#fiboEXIT >#33#return; 1280#L13-1 call #t~ret8 := fibo(~n - 2);< 1304#fiboENTRY ~n := #in~n; 1282#L8 assume ~n < 1;#res := 0; 1283#fiboFINAL assume true; 1279#fiboEXIT >#35#return; 1256#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1258#fiboFINAL assume true; 1275#fiboEXIT >#33#return; 1269#L13-1 [2021-10-21 20:21:46,333 INFO L793 eck$LassoCheckResult]: Loop: 1269#L13-1 call #t~ret8 := fibo(~n - 2);< 1267#fiboENTRY ~n := #in~n; 1272#L8 assume !(~n < 1); 1346#L10 assume !(1 == ~n); 1268#L13 call #t~ret7 := fibo(~n - 1);< 1267#fiboENTRY ~n := #in~n; 1272#L8 assume !(~n < 1); 1346#L10 assume !(1 == ~n); 1268#L13 call #t~ret7 := fibo(~n - 1);< 1267#fiboENTRY ~n := #in~n; 1272#L8 assume !(~n < 1); 1346#L10 assume !(1 == ~n); 1268#L13 call #t~ret7 := fibo(~n - 1);< 1267#fiboENTRY ~n := #in~n; 1272#L8 assume !(~n < 1); 1346#L10 assume 1 == ~n;#res := 1; 1286#fiboFINAL assume true; 1337#fiboEXIT >#33#return; 1251#L13-1 call #t~ret8 := fibo(~n - 2);< 1252#fiboENTRY ~n := #in~n; 1313#L8 assume ~n < 1;#res := 0; 1314#fiboFINAL assume true; 1349#fiboEXIT >#35#return; 1340#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1347#fiboFINAL assume true; 1343#fiboEXIT >#33#return; 1269#L13-1 call #t~ret8 := fibo(~n - 2);< 1267#fiboENTRY ~n := #in~n; 1272#L8 assume !(~n < 1); 1346#L10 assume !(1 == ~n); 1268#L13 call #t~ret7 := fibo(~n - 1);< 1267#fiboENTRY ~n := #in~n; 1272#L8 assume !(~n < 1); 1346#L10 assume 1 == ~n;#res := 1; 1286#fiboFINAL assume true; 1337#fiboEXIT >#33#return; 1251#L13-1 call #t~ret8 := fibo(~n - 2);< 1252#fiboENTRY ~n := #in~n; 1313#L8 assume ~n < 1;#res := 0; 1314#fiboFINAL assume true; 1349#fiboEXIT >#35#return; 1340#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1347#fiboFINAL assume true; 1343#fiboEXIT >#35#return; 1338#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1345#fiboFINAL assume true; 1341#fiboEXIT >#33#return; 1269#L13-1 [2021-10-21 20:21:46,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:46,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1730264506, now seen corresponding path program 2 times [2021-10-21 20:21:46,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:46,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682547847] [2021-10-21 20:21:46,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:46,334 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:46,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:46,346 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:21:46,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:46,368 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:21:46,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:46,369 INFO L82 PathProgramCache]: Analyzing trace with hash 564146419, now seen corresponding path program 2 times [2021-10-21 20:21:46,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:46,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888441801] [2021-10-21 20:21:46,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:46,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:46,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:46,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-10-21 20:21:46,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:46,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 20:21:46,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:46,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 20:21:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:46,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 20:21:46,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:46,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-10-21 20:21:46,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:46,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 20:21:46,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:46,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 20:21:46,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:46,560 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 45 proven. 31 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-10-21 20:21:46,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:21:46,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888441801] [2021-10-21 20:21:46,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888441801] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:21:46,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308395430] [2021-10-21 20:21:46,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:21:46,562 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:21:46,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:46,563 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:21:46,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-21 20:21:46,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:21:46,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:21:46,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-21 20:21:46,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:46,826 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 38 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-10-21 20:21:46,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308395430] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:21:46,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:21:46,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-10-21 20:21:46,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020493035] [2021-10-21 20:21:46,828 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-21 20:21:46,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:21:46,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 20:21:46,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-10-21 20:21:46,829 INFO L87 Difference]: Start difference. First operand 114 states and 157 transitions. cyclomatic complexity: 49 Second operand has 13 states, 10 states have (on average 2.9) internal successors, (29), 11 states have internal predecessors, (29), 9 states have call successors, (11), 1 states have call predecessors, (11), 6 states have return successors, (11), 6 states have call predecessors, (11), 9 states have call successors, (11) [2021-10-21 20:21:46,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:21:46,990 INFO L93 Difference]: Finished difference Result 65 states and 84 transitions. [2021-10-21 20:21:46,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 20:21:46,991 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 65 states and 84 transitions. [2021-10-21 20:21:46,992 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-10-21 20:21:46,995 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 65 states to 59 states and 77 transitions. [2021-10-21 20:21:46,996 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 48 [2021-10-21 20:21:46,997 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 48 [2021-10-21 20:21:46,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 77 transitions. [2021-10-21 20:21:46,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 20:21:46,999 INFO L681 BuchiCegarLoop]: Abstraction has 59 states and 77 transitions. [2021-10-21 20:21:46,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states and 77 transitions. [2021-10-21 20:21:47,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2021-10-21 20:21:47,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 11 states have call successors, (11), 8 states have call predecessors, (11), 8 states have return successors, (18), 10 states have call predecessors, (18), 9 states have call successors, (18) [2021-10-21 20:21:47,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2021-10-21 20:21:47,021 INFO L704 BuchiCegarLoop]: Abstraction has 56 states and 70 transitions. [2021-10-21 20:21:47,021 INFO L587 BuchiCegarLoop]: Abstraction has 56 states and 70 transitions. [2021-10-21 20:21:47,021 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-10-21 20:21:47,021 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 56 states and 70 transitions. [2021-10-21 20:21:47,022 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-10-21 20:21:47,023 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 20:21:47,023 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 20:21:47,026 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [8, 6, 5, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-10-21 20:21:47,029 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1] [2021-10-21 20:21:47,029 INFO L791 eck$LassoCheckResult]: Stem: 1684#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(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 1685#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 1697#L27 call main_#t~ret9 := fibo(main_~x~0);< 1698#fiboENTRY ~n := #in~n; 1725#L8 assume !(~n < 1); 1723#L10 assume !(1 == ~n); 1692#L13 call #t~ret7 := fibo(~n - 1);< 1702#fiboENTRY ~n := #in~n; 1703#L8 assume !(~n < 1); 1709#L10 assume !(1 == ~n); 1691#L13 call #t~ret7 := fibo(~n - 1);< 1693#fiboENTRY ~n := #in~n; 1719#L8 assume !(~n < 1); 1724#L10 assume !(1 == ~n); 1695#L13 call #t~ret7 := fibo(~n - 1);< 1693#fiboENTRY ~n := #in~n; 1719#L8 assume !(~n < 1); 1724#L10 assume !(1 == ~n); 1695#L13 call #t~ret7 := fibo(~n - 1);< 1693#fiboENTRY ~n := #in~n; 1719#L8 assume !(~n < 1); 1724#L10 assume !(1 == ~n); 1695#L13 call #t~ret7 := fibo(~n - 1);< 1693#fiboENTRY ~n := #in~n; 1715#L8 assume !(~n < 1); 1716#L10 assume 1 == ~n;#res := 1; 1735#fiboFINAL assume true; 1734#fiboEXIT >#33#return; 1700#L13-1 call #t~ret8 := fibo(~n - 2);< 1699#fiboENTRY ~n := #in~n; 1701#L8 assume ~n < 1;#res := 0; 1708#fiboFINAL assume true; 1733#fiboEXIT >#35#return; 1731#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1728#fiboFINAL assume true; 1722#fiboEXIT >#33#return; 1706#L13-1 call #t~ret8 := fibo(~n - 2);< 1717#fiboENTRY ~n := #in~n; 1718#L8 assume ~n < 1;#res := 0; 1732#fiboFINAL assume true; 1729#fiboEXIT >#35#return; 1694#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1696#fiboFINAL assume true; 1704#fiboEXIT >#33#return; 1688#L13-1 [2021-10-21 20:21:47,030 INFO L793 eck$LassoCheckResult]: Loop: 1688#L13-1 call #t~ret8 := fibo(~n - 2);< 1712#fiboENTRY ~n := #in~n; 1736#L8 assume !(~n < 1); 1713#L10 assume !(1 == ~n); 1686#L13 call #t~ret7 := fibo(~n - 1);< 1690#fiboENTRY ~n := #in~n; 1714#L8 assume !(~n < 1); 1713#L10 assume !(1 == ~n); 1686#L13 call #t~ret7 := fibo(~n - 1);< 1690#fiboENTRY ~n := #in~n; 1714#L8 assume !(~n < 1); 1713#L10 assume !(1 == ~n); 1686#L13 call #t~ret7 := fibo(~n - 1);< 1690#fiboENTRY ~n := #in~n; 1714#L8 assume !(~n < 1); 1713#L10 assume 1 == ~n;#res := 1; 1711#fiboFINAL assume true; 1705#fiboEXIT >#33#return; 1707#L13-1 call #t~ret8 := fibo(~n - 2);< 1730#fiboENTRY ~n := #in~n; 1737#L8 assume ~n < 1;#res := 0; 1732#fiboFINAL assume true; 1729#fiboEXIT >#35#return; 1727#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1726#fiboFINAL assume true; 1720#fiboEXIT >#33#return; 1706#L13-1 call #t~ret8 := fibo(~n - 2);< 1717#fiboENTRY ~n := #in~n; 1718#L8 assume ~n < 1;#res := 0; 1732#fiboFINAL assume true; 1729#fiboEXIT >#35#return; 1694#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1696#fiboFINAL assume true; 1704#fiboEXIT >#33#return; 1688#L13-1 [2021-10-21 20:21:47,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:47,033 INFO L82 PathProgramCache]: Analyzing trace with hash -2124338928, now seen corresponding path program 3 times [2021-10-21 20:21:47,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:47,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042545566] [2021-10-21 20:21:47,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:47,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:47,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:47,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-21 20:21:47,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:47,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 20:21:47,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:47,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 20:21:47,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:47,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 20:21:47,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:47,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-10-21 20:21:47,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:47,270 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 35 proven. 51 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-21 20:21:47,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:21:47,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042545566] [2021-10-21 20:21:47,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042545566] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:21:47,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579397260] [2021-10-21 20:21:47,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:21:47,272 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:21:47,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:47,274 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:21:47,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-21 20:21:47,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-21 20:21:47,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:21:47,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 20:21:47,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:47,552 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-10-21 20:21:47,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579397260] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:21:47,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:21:47,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 18 [2021-10-21 20:21:47,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198205194] [2021-10-21 20:21:47,556 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 20:21:47,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:47,556 INFO L82 PathProgramCache]: Analyzing trace with hash -176759904, now seen corresponding path program 3 times [2021-10-21 20:21:47,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:47,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669106910] [2021-10-21 20:21:47,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:47,557 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:47,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:47,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-10-21 20:21:47,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:47,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 20:21:47,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:47,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 20:21:47,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:47,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 20:21:47,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:47,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-10-21 20:21:47,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:47,667 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-21 20:21:47,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:21:47,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669106910] [2021-10-21 20:21:47,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669106910] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:21:47,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482021040] [2021-10-21 20:21:47,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:21:47,669 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:21:47,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:47,672 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:21:47,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-21 20:21:47,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-21 20:21:47,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:21:47,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 20:21:47,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:47,931 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-21 20:21:47,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482021040] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:21:47,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:21:47,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-10-21 20:21:47,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880342018] [2021-10-21 20:21:47,933 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-21 20:21:47,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:21:47,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 20:21:47,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-10-21 20:21:47,934 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. cyclomatic complexity: 16 Second operand has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2021-10-21 20:21:48,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:21:48,033 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2021-10-21 20:21:48,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 20:21:48,034 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 56 states and 66 transitions. [2021-10-21 20:21:48,035 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-10-21 20:21:48,036 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 56 states to 56 states and 66 transitions. [2021-10-21 20:21:48,036 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 45 [2021-10-21 20:21:48,037 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 45 [2021-10-21 20:21:48,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 66 transitions. [2021-10-21 20:21:48,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 20:21:48,037 INFO L681 BuchiCegarLoop]: Abstraction has 56 states and 66 transitions. [2021-10-21 20:21:48,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states and 66 transitions. [2021-10-21 20:21:48,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2021-10-21 20:21:48,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (16), 10 states have call predecessors, (16), 9 states have call successors, (16) [2021-10-21 20:21:48,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-10-21 20:21:48,041 INFO L704 BuchiCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-10-21 20:21:48,041 INFO L587 BuchiCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-10-21 20:21:48,041 INFO L425 BuchiCegarLoop]: ======== Iteration 7============ [2021-10-21 20:21:48,041 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 54 states and 64 transitions. [2021-10-21 20:21:48,042 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-21 20:21:48,042 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 20:21:48,042 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 20:21:48,044 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [8, 7, 5, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-10-21 20:21:48,044 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2021-10-21 20:21:48,044 INFO L791 eck$LassoCheckResult]: Stem: 2177#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(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 2178#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 2190#L27 call main_#t~ret9 := fibo(main_~x~0);< 2191#fiboENTRY ~n := #in~n; 2214#L8 assume !(~n < 1); 2212#L10 assume !(1 == ~n); 2185#L13 call #t~ret7 := fibo(~n - 1);< 2195#fiboENTRY ~n := #in~n; 2196#L8 assume !(~n < 1); 2200#L10 assume !(1 == ~n); 2184#L13 call #t~ret7 := fibo(~n - 1);< 2186#fiboENTRY ~n := #in~n; 2209#L8 assume !(~n < 1); 2213#L10 assume !(1 == ~n); 2188#L13 call #t~ret7 := fibo(~n - 1);< 2186#fiboENTRY ~n := #in~n; 2209#L8 assume !(~n < 1); 2213#L10 assume !(1 == ~n); 2188#L13 call #t~ret7 := fibo(~n - 1);< 2186#fiboENTRY ~n := #in~n; 2209#L8 assume !(~n < 1); 2213#L10 assume !(1 == ~n); 2188#L13 call #t~ret7 := fibo(~n - 1);< 2186#fiboENTRY ~n := #in~n; 2208#L8 assume !(~n < 1); 2227#L10 assume 1 == ~n;#res := 1; 2226#fiboFINAL assume true; 2225#fiboEXIT >#33#return; 2193#L13-1 call #t~ret8 := fibo(~n - 2);< 2192#fiboENTRY ~n := #in~n; 2194#L8 assume ~n < 1;#res := 0; 2199#fiboFINAL assume true; 2223#fiboEXIT >#35#return; 2221#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 2217#fiboFINAL assume true; 2211#fiboEXIT >#33#return; 2202#L13-1 call #t~ret8 := fibo(~n - 2);< 2207#fiboENTRY ~n := #in~n; 2206#L8 assume !(~n < 1); 2201#L10 assume 1 == ~n;#res := 1; 2203#fiboFINAL assume true; 2230#fiboEXIT >#35#return; 2187#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 2189#fiboFINAL assume true; 2197#fiboEXIT >#33#return; 2181#L13-1 [2021-10-21 20:21:48,044 INFO L793 eck$LassoCheckResult]: Loop: 2181#L13-1 call #t~ret8 := fibo(~n - 2);< 2183#fiboENTRY ~n := #in~n; 2205#L8 assume !(~n < 1); 2204#L10 assume !(1 == ~n); 2179#L13 call #t~ret7 := fibo(~n - 1);< 2183#fiboENTRY ~n := #in~n; 2205#L8 assume !(~n < 1); 2204#L10 assume !(1 == ~n); 2179#L13 call #t~ret7 := fibo(~n - 1);< 2183#fiboENTRY ~n := #in~n; 2205#L8 assume !(~n < 1); 2204#L10 assume !(1 == ~n); 2179#L13 call #t~ret7 := fibo(~n - 1);< 2183#fiboENTRY ~n := #in~n; 2205#L8 assume !(~n < 1); 2204#L10 assume 1 == ~n;#res := 1; 2203#fiboFINAL assume true; 2230#fiboEXIT >#33#return; 2219#L13-1 call #t~ret8 := fibo(~n - 2);< 2220#fiboENTRY ~n := #in~n; 2224#L8 assume ~n < 1;#res := 0; 2222#fiboFINAL assume true; 2218#fiboEXIT >#35#return; 2216#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 2215#fiboFINAL assume true; 2210#fiboEXIT >#33#return; 2202#L13-1 call #t~ret8 := fibo(~n - 2);< 2207#fiboENTRY ~n := #in~n; 2206#L8 assume !(~n < 1); 2201#L10 assume 1 == ~n;#res := 1; 2203#fiboFINAL assume true; 2230#fiboEXIT >#35#return; 2187#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 2189#fiboFINAL assume true; 2197#fiboEXIT >#33#return; 2181#L13-1 [2021-10-21 20:21:48,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:48,045 INFO L82 PathProgramCache]: Analyzing trace with hash -690973043, now seen corresponding path program 4 times [2021-10-21 20:21:48,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:48,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208069517] [2021-10-21 20:21:48,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:48,045 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:48,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:48,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-21 20:21:48,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:48,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 20:21:48,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:48,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 20:21:48,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:48,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 20:21:48,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:48,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-10-21 20:21:48,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:48,269 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 28 proven. 60 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-21 20:21:48,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:21:48,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208069517] [2021-10-21 20:21:48,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208069517] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:21:48,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036487190] [2021-10-21 20:21:48,270 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 20:21:48,270 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:21:48,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:48,275 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:21:48,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-21 20:21:48,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 20:21:48,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:21:48,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-21 20:21:48,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:48,608 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 26 proven. 65 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-21 20:21:48,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036487190] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:21:48,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:21:48,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 16 [2021-10-21 20:21:48,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634902988] [2021-10-21 20:21:48,610 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 20:21:48,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:48,611 INFO L82 PathProgramCache]: Analyzing trace with hash -445565443, now seen corresponding path program 4 times [2021-10-21 20:21:48,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:48,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296893845] [2021-10-21 20:21:48,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:48,612 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:48,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:48,622 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:21:48,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:48,636 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:21:49,133 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 20:21:49,133 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 20:21:49,133 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 20:21:49,133 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 20:21:49,133 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-21 20:21:49,133 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:49,133 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 20:21:49,133 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 20:21:49,133 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration7_Loop [2021-10-21 20:21:49,134 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 20:21:49,134 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 20:21:49,135 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:49,147 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:49,150 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:49,152 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:49,232 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 20:21:49,232 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-21 20:21:49,232 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:49,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:49,239 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:49,245 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 20:21:49,246 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 20:21:49,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-10-21 20:21:49,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:49,278 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:49,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:49,279 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:49,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-10-21 20:21:49,281 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-21 20:21:49,281 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 20:21:50,084 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-21 20:21:50,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:50,089 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 20:21:50,089 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 20:21:50,089 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 20:21:50,089 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 20:21:50,089 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-21 20:21:50,089 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:50,089 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 20:21:50,089 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 20:21:50,089 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration7_Loop [2021-10-21 20:21:50,089 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 20:21:50,089 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 20:21:50,090 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:50,107 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:50,108 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:50,111 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:50,172 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 20:21:50,172 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-21 20:21:50,172 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:50,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:50,175 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:50,192 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 20:21:50,205 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 20:21:50,206 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 20:21:50,206 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 20:21:50,206 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 20:21:50,206 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 20:21:50,211 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 20:21:50,211 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 20:21:50,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2021-10-21 20:21:50,227 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-21 20:21:50,232 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-10-21 20:21:50,232 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-10-21 20:21:50,232 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:50,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:50,234 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:50,236 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-21 20:21:50,236 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-21 20:21:50,236 INFO L513 LassoAnalysis]: Proved termination. [2021-10-21 20:21:50,236 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2021-10-21 20:21:50,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2021-10-21 20:21:50,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:50,280 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-21 20:21:50,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:50,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:50,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-21 20:21:50,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:51,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:51,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:51,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-21 20:21:51,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:51,521 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 14 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-21 20:21:51,522 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 [2021-10-21 20:21:51,523 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 54 states and 64 transitions. cyclomatic complexity: 12 Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 7 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-21 20:21:51,629 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 54 states and 64 transitions. cyclomatic complexity: 12. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 7 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) Result 61 states and 71 transitions. Complement of second has 11 states. [2021-10-21 20:21:51,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2021-10-21 20:21:51,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 7 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-21 20:21:51,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 17 transitions. [2021-10-21 20:21:51,631 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 45 letters. Loop has 35 letters. [2021-10-21 20:21:51,633 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:21:51,633 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-21 20:21:51,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:51,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:51,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-21 20:21:51,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:52,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:52,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-21 20:21:52,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:52,800 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 14 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-21 20:21:52,801 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 [2021-10-21 20:21:52,801 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 54 states and 64 transitions. cyclomatic complexity: 12 Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 7 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-21 20:21:52,902 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 54 states and 64 transitions. cyclomatic complexity: 12. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 7 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) Result 61 states and 71 transitions. Complement of second has 11 states. [2021-10-21 20:21:52,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2021-10-21 20:21:52,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 7 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-21 20:21:52,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 17 transitions. [2021-10-21 20:21:52,905 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 45 letters. Loop has 35 letters. [2021-10-21 20:21:52,905 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:21:52,905 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-21 20:21:52,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:52,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:52,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-21 20:21:52,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:53,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:53,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-21 20:21:53,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:54,059 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 14 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-21 20:21:54,062 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 [2021-10-21 20:21:54,062 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 54 states and 64 transitions. cyclomatic complexity: 12 Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 7 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-21 20:21:54,460 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 54 states and 64 transitions. cyclomatic complexity: 12. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 7 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) Result 353 states and 439 transitions. Complement of second has 142 states. [2021-10-21 20:21:54,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2021-10-21 20:21:54,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 7 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-21 20:21:54,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 52 transitions. [2021-10-21 20:21:54,464 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 45 letters. Loop has 35 letters. [2021-10-21 20:21:54,472 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:21:54,472 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 80 letters. Loop has 35 letters. [2021-10-21 20:21:54,473 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:21:54,473 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 45 letters. Loop has 70 letters. [2021-10-21 20:21:54,478 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:21:54,479 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 353 states and 439 transitions. [2021-10-21 20:21:54,489 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-21 20:21:54,499 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 353 states to 221 states and 281 transitions. [2021-10-21 20:21:54,499 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 78 [2021-10-21 20:21:54,500 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 105 [2021-10-21 20:21:54,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 221 states and 281 transitions. [2021-10-21 20:21:54,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 20:21:54,502 INFO L681 BuchiCegarLoop]: Abstraction has 221 states and 281 transitions. [2021-10-21 20:21:54,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states and 281 transitions. [2021-10-21 20:21:54,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 213. [2021-10-21 20:21:54,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 134 states have (on average 1.1044776119402986) internal successors, (148), 140 states have internal predecessors, (148), 43 states have call successors, (43), 28 states have call predecessors, (43), 36 states have return successors, (68), 44 states have call predecessors, (68), 40 states have call successors, (68) [2021-10-21 20:21:54,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 259 transitions. [2021-10-21 20:21:54,527 INFO L704 BuchiCegarLoop]: Abstraction has 213 states and 259 transitions. [2021-10-21 20:21:54,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:21:54,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-21 20:21:54,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-10-21 20:21:54,529 INFO L87 Difference]: Start difference. First operand 213 states and 259 transitions. Second operand has 17 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 10 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2021-10-21 20:21:54,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:21:54,864 INFO L93 Difference]: Finished difference Result 124 states and 131 transitions. [2021-10-21 20:21:54,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-21 20:21:54,865 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 124 states and 131 transitions. [2021-10-21 20:21:54,867 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-10-21 20:21:54,869 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 124 states to 63 states and 66 transitions. [2021-10-21 20:21:54,869 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 49 [2021-10-21 20:21:54,869 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 52 [2021-10-21 20:21:54,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 66 transitions. [2021-10-21 20:21:54,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 20:21:54,870 INFO L681 BuchiCegarLoop]: Abstraction has 63 states and 66 transitions. [2021-10-21 20:21:54,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states and 66 transitions. [2021-10-21 20:21:54,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2021-10-21 20:21:54,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 43 states have internal predecessors, (45), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-10-21 20:21:54,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2021-10-21 20:21:54,873 INFO L704 BuchiCegarLoop]: Abstraction has 62 states and 65 transitions. [2021-10-21 20:21:54,873 INFO L587 BuchiCegarLoop]: Abstraction has 62 states and 65 transitions. [2021-10-21 20:21:54,874 INFO L425 BuchiCegarLoop]: ======== Iteration 8============ [2021-10-21 20:21:54,874 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 62 states and 65 transitions. [2021-10-21 20:21:54,874 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-10-21 20:21:54,875 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 20:21:54,875 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 20:21:54,876 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [9, 8, 6, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2021-10-21 20:21:54,876 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-21 20:21:54,878 INFO L791 eck$LassoCheckResult]: Stem: 4227#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(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 4228#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 4239#L27 call main_#t~ret9 := fibo(main_~x~0);< 4240#fiboENTRY ~n := #in~n; 4255#L8 assume !(~n < 1); 4261#L10 assume !(1 == ~n); 4233#L13 call #t~ret7 := fibo(~n - 1);< 4242#fiboENTRY ~n := #in~n; 4243#L8 assume !(~n < 1); 4251#L10 assume !(1 == ~n); 4232#L13 call #t~ret7 := fibo(~n - 1);< 4234#fiboENTRY ~n := #in~n; 4258#L8 assume !(~n < 1); 4263#L10 assume !(1 == ~n); 4257#L13 call #t~ret7 := fibo(~n - 1);< 4234#fiboENTRY ~n := #in~n; 4258#L8 assume !(~n < 1); 4263#L10 assume !(1 == ~n); 4257#L13 call #t~ret7 := fibo(~n - 1);< 4234#fiboENTRY ~n := #in~n; 4259#L8 assume !(~n < 1); 4272#L10 assume 1 == ~n;#res := 1; 4270#fiboFINAL assume true; 4269#fiboEXIT >#33#return; 4267#L13-1 call #t~ret8 := fibo(~n - 2);< 4268#fiboENTRY ~n := #in~n; 4273#L8 assume ~n < 1;#res := 0; 4271#fiboFINAL assume true; 4266#fiboEXIT >#35#return; 4265#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 4264#fiboFINAL assume true; 4262#fiboEXIT >#33#return; 4245#L13-1 call #t~ret8 := fibo(~n - 2);< 4260#fiboENTRY ~n := #in~n; 4256#L8 assume !(~n < 1); 4252#L10 assume 1 == ~n;#res := 1; 4244#fiboFINAL assume true; 4246#fiboEXIT >#35#return; 4286#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 4284#fiboFINAL assume true; 4282#fiboEXIT >#33#return; 4236#L13-1 call #t~ret8 := fibo(~n - 2);< 4253#fiboENTRY ~n := #in~n; 4281#L8 assume !(~n < 1); 4280#L10 assume !(1 == ~n); 4231#L13 call #t~ret7 := fibo(~n - 1);< 4276#fiboENTRY ~n := #in~n; 4279#L8 assume !(~n < 1); 4278#L10 assume !(1 == ~n); 4229#L13 [2021-10-21 20:21:54,878 INFO L793 eck$LassoCheckResult]: Loop: 4229#L13 call #t~ret7 := fibo(~n - 1);< 4230#fiboENTRY ~n := #in~n; 4241#L8 assume !(~n < 1); 4254#L10 assume !(1 == ~n); 4229#L13 [2021-10-21 20:21:54,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:54,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1327795734, now seen corresponding path program 5 times [2021-10-21 20:21:54,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:54,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541853770] [2021-10-21 20:21:54,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:54,879 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:54,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:55,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-21 20:21:55,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:55,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 20:21:55,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:55,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 20:21:55,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:55,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 20:21:55,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:55,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-10-21 20:21:55,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:55,057 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 53 proven. 32 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-21 20:21:55,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:21:55,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541853770] [2021-10-21 20:21:55,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541853770] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:21:55,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273231766] [2021-10-21 20:21:55,059 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 20:21:55,059 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:21:55,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:55,063 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:21:55,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-21 20:21:55,464 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-10-21 20:21:55,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:21:55,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 20:21:55,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:55,650 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 58 proven. 35 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-10-21 20:21:55,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273231766] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:21:55,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:21:55,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 14 [2021-10-21 20:21:55,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757214071] [2021-10-21 20:21:55,653 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 20:21:55,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:55,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1893846, now seen corresponding path program 2 times [2021-10-21 20:21:55,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:55,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89232405] [2021-10-21 20:21:55,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:55,655 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:55,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:55,663 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:21:55,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:55,666 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:21:55,723 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 20:21:55,723 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 20:21:55,723 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 20:21:55,723 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 20:21:55,723 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-21 20:21:55,724 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:55,724 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 20:21:55,724 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 20:21:55,724 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration8_Loop [2021-10-21 20:21:55,724 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 20:21:55,724 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 20:21:55,726 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:55,739 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:55,742 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:55,745 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:55,801 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 20:21:55,802 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-21 20:21:55,802 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:55,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:55,803 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:55,805 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 20:21:55,806 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 20:21:55,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2021-10-21 20:21:55,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:55,879 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:55,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:55,880 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:55,882 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-21 20:21:55,883 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 20:21:55,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2021-10-21 20:21:58,726 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-21 20:21:58,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:58,729 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 20:21:58,729 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 20:21:58,730 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 20:21:58,730 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 20:21:58,730 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-21 20:21:58,730 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:58,730 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 20:21:58,730 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 20:21:58,730 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration8_Loop [2021-10-21 20:21:58,730 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 20:21:58,730 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 20:21:58,731 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:58,738 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:58,740 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:58,742 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:58,788 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 20:21:58,788 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-21 20:21:58,788 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:58,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:58,793 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:58,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2021-10-21 20:21:58,795 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 20:21:58,804 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 20:21:58,804 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 20:21:58,804 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 20:21:58,804 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 20:21:58,804 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 20:21:58,805 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 20:21:58,806 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 20:21:58,808 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-21 20:21:58,831 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-21 20:21:58,832 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-21 20:21:58,832 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:58,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:58,840 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:58,843 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-21 20:21:58,844 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-21 20:21:58,844 INFO L513 LassoAnalysis]: Proved termination. [2021-10-21 20:21:58,844 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2021-10-21 20:21:58,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2021-10-21 20:21:58,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:58,886 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-21 20:21:58,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:58,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:58,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-21 20:21:58,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:59,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:59,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:59,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 20:21:59,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:59,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:21:59,811 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2021-10-21 20:21:59,811 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 62 states and 65 transitions. cyclomatic complexity: 5 Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-21 20:21:59,874 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 62 states and 65 transitions. cyclomatic complexity: 5. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 71 states and 75 transitions. Complement of second has 18 states. [2021-10-21 20:21:59,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2021-10-21 20:21:59,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-21 20:21:59,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2021-10-21 20:21:59,876 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 49 letters. Loop has 4 letters. [2021-10-21 20:21:59,876 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:21:59,876 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-21 20:21:59,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:59,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:59,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-21 20:21:59,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:22:00,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:22:00,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 20:22:00,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:22:00,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:22:00,717 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2021-10-21 20:22:00,717 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 62 states and 65 transitions. cyclomatic complexity: 5 Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-21 20:22:00,807 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 62 states and 65 transitions. cyclomatic complexity: 5. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 77 states and 81 transitions. Complement of second has 17 states. [2021-10-21 20:22:00,809 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 [2021-10-21 20:22:00,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-21 20:22:00,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2021-10-21 20:22:00,810 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 49 letters. Loop has 4 letters. [2021-10-21 20:22:00,810 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:22:00,810 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-21 20:22:00,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:22:00,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:22:00,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-21 20:22:00,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:22:01,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:22:01,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 20:22:01,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:22:01,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:22:01,624 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2021-10-21 20:22:01,624 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 62 states and 65 transitions. cyclomatic complexity: 5 Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-21 20:22:01,703 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 62 states and 65 transitions. cyclomatic complexity: 5. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 86 states and 93 transitions. Complement of second has 27 states. [2021-10-21 20:22:01,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2021-10-21 20:22:01,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-21 20:22:01,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2021-10-21 20:22:01,705 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 49 letters. Loop has 4 letters. [2021-10-21 20:22:01,708 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:22:01,709 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 53 letters. Loop has 4 letters. [2021-10-21 20:22:01,711 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:22:01,711 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 49 letters. Loop has 8 letters. [2021-10-21 20:22:01,712 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:22:01,712 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 86 states and 93 transitions. [2021-10-21 20:22:01,714 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-21 20:22:01,714 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 86 states to 0 states and 0 transitions. [2021-10-21 20:22:01,714 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-10-21 20:22:01,715 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-10-21 20:22:01,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-10-21 20:22:01,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:22:01,715 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 20:22:01,715 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 20:22:01,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:22:01,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 20:22:01,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-10-21 20:22:01,717 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand has 15 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 7 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-10-21 20:22:01,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:22:01,717 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2021-10-21 20:22:01,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-21 20:22:01,718 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2021-10-21 20:22:01,718 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-21 20:22:01,718 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2021-10-21 20:22:01,718 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-10-21 20:22:01,719 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-10-21 20:22:01,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-10-21 20:22:01,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:22:01,719 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 20:22:01,719 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 20:22:01,719 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 20:22:01,719 INFO L425 BuchiCegarLoop]: ======== Iteration 9============ [2021-10-21 20:22:01,720 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-10-21 20:22:01,720 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-21 20:22:01,720 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-10-21 20:22:01,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 21.10 08:22:01 BoogieIcfgContainer [2021-10-21 20:22:01,732 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-10-21 20:22:01,733 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 20:22:01,733 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 20:22:01,734 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 20:22:01,734 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:21:40" (3/4) ... [2021-10-21 20:22:01,739 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-21 20:22:01,739 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 20:22:01,741 INFO L168 Benchmark]: Toolchain (without parser) took 22158.98 ms. Allocated memory was 86.0 MB in the beginning and 151.0 MB in the end (delta: 65.0 MB). Free memory was 48.9 MB in the beginning and 36.6 MB in the end (delta: 12.3 MB). Peak memory consumption was 76.9 MB. Max. memory is 16.1 GB. [2021-10-21 20:22:01,742 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 86.0 MB. Free memory is still 65.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:22:01,743 INFO L168 Benchmark]: CACSL2BoogieTranslator took 264.62 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 48.7 MB in the beginning and 82.2 MB in the end (delta: -33.5 MB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. [2021-10-21 20:22:01,743 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.55 ms. Allocated memory is still 104.9 MB. Free memory was 82.2 MB in the beginning and 80.8 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:22:01,744 INFO L168 Benchmark]: Boogie Preprocessor took 18.22 ms. Allocated memory is still 104.9 MB. Free memory was 80.8 MB in the beginning and 79.9 MB in the end (delta: 984.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:22:01,744 INFO L168 Benchmark]: RCFGBuilder took 280.19 ms. Allocated memory is still 104.9 MB. Free memory was 79.9 MB in the beginning and 70.9 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 20:22:01,745 INFO L168 Benchmark]: BuchiAutomizer took 21554.99 ms. Allocated memory was 104.9 MB in the beginning and 151.0 MB in the end (delta: 46.1 MB). Free memory was 70.6 MB in the beginning and 37.6 MB in the end (delta: 33.0 MB). Peak memory consumption was 82.0 MB. Max. memory is 16.1 GB. [2021-10-21 20:22:01,746 INFO L168 Benchmark]: Witness Printer took 6.08 ms. Allocated memory is still 151.0 MB. Free memory was 37.6 MB in the beginning and 36.6 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:22:01,749 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 86.0 MB. Free memory is still 65.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 264.62 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 48.7 MB in the beginning and 82.2 MB in the end (delta: -33.5 MB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 28.55 ms. Allocated memory is still 104.9 MB. Free memory was 82.2 MB in the beginning and 80.8 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.22 ms. Allocated memory is still 104.9 MB. Free memory was 80.8 MB in the beginning and 79.9 MB in the end (delta: 984.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 280.19 ms. Allocated memory is still 104.9 MB. Free memory was 79.9 MB in the beginning and 70.9 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 21554.99 ms. Allocated memory was 104.9 MB in the beginning and 151.0 MB in the end (delta: 46.1 MB). Free memory was 70.6 MB in the beginning and 37.6 MB in the end (delta: 33.0 MB). Peak memory consumption was 82.0 MB. Max. memory is 16.1 GB. * Witness Printer took 6.08 ms. Allocated memory is still 151.0 MB. Free memory was 37.6 MB in the beginning and 36.6 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 11 terminating modules (7 trivial, 2 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 9 locations. One nondeterministic module has affine ranking function n and consists of 11 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. 7 modules have a trivial ranking function, the largest among these consists of 17 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 21.5s and 9 iterations. TraceHistogramMax:9. Analysis of lassos took 12.1s. Construction of modules took 0.7s. Büchi inclusion checks took 8.2s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 9. Automata minimization 132.4ms AutomataMinimizationTime, 9 MinimizatonAttempts, 45 StatesRemovedByMinimization, 7 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had 114 states and ocurred in iteration 4. Nontrivial modules had stage [2, 0, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 32/70 HoareTripleCheckerStatistics: 178 SDtfs, 374 SDslu, 262 SDs, 0 SdLazy, 857 SolverSat, 256 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 760.1ms Time LassoAnalysisResults: nont0 unkn0 SFLI1 SFLT1 conc0 concLT0 SILN0 SILU0 SILI3 SILT3 lasso0 LassoPreprocessingBenchmarks: Lassos: inital18 mio100 ax100 hnf96 lsp92 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq182 hnf93 smp80 dnf100 smp100 tf109 neg96 sie108 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 31ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 5 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 5.3s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-10-21 20:22:01,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-21 20:22:02,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-10-21 20:22:02,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-21 20:22:02,422 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-10-21 20:22:02,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-10-21 20:22:02,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-21 20:22:03,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-10-21 20:22:03,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-21 20:22:03,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b4adf6-7849-4da2-8364-31e7d8f3f6e1/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...