./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_10-2.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_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/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_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_10-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/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_90059940-f947-4b52-a219-ac2fc9671b0c/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 a6546395432109233bf3e1991428a566548dd822bb23ca198622322bf4db5a8a ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 19:11:24,585 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:11:24,588 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:11:24,647 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:11:24,648 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:11:24,653 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:11:24,655 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:11:24,660 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:11:24,663 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:11:24,668 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:11:24,669 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:11:24,672 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:11:24,672 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:11:24,675 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:11:24,677 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:11:24,682 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:11:24,684 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:11:24,685 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:11:24,687 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:11:24,697 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:11:24,700 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:11:24,701 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:11:24,705 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:11:24,706 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:11:24,711 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:11:24,711 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:11:24,712 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:11:24,714 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:11:24,714 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:11:24,716 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:11:24,717 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:11:24,718 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:11:24,720 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:11:24,721 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:11:24,723 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:11:24,723 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:11:24,724 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:11:24,724 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:11:24,725 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:11:24,726 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:11:24,726 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:11:24,727 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-10-21 19:11:24,774 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:11:24,775 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:11:24,775 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:11:24,776 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:11:24,778 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:11:24,778 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:11:24,778 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:11:24,778 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-10-21 19:11:24,779 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-10-21 19:11:24,779 INFO L138 SettingsManager]: * Use old map elimination=false [2021-10-21 19:11:24,780 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-10-21 19:11:24,780 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-10-21 19:11:24,781 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-10-21 19:11:24,781 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:11:24,781 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:11:24,781 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 19:11:24,782 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:11:24,782 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:11:24,782 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:11:24,782 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-10-21 19:11:24,782 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-10-21 19:11:24,783 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-10-21 19:11:24,783 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:11:24,783 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 19:11:24,783 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-10-21 19:11:24,784 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:11:24,785 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-10-21 19:11:24,786 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:11:24,786 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:11:24,786 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:11:24,786 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:11:24,787 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:11:24,788 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-10-21 19:11:24,789 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_90059940-f947-4b52-a219-ac2fc9671b0c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6546395432109233bf3e1991428a566548dd822bb23ca198622322bf4db5a8a [2021-10-21 19:11:25,117 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:11:25,139 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:11:25,142 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:11:25,143 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:11:25,144 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:11:25,145 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/recursive-simple/fibo_10-2.c [2021-10-21 19:11:25,210 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/data/85bade4a6/c35ff8d79c3c481a8fc948347e71a321/FLAG77ce588e1 [2021-10-21 19:11:25,650 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:11:25,650 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/sv-benchmarks/c/recursive-simple/fibo_10-2.c [2021-10-21 19:11:25,656 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/data/85bade4a6/c35ff8d79c3c481a8fc948347e71a321/FLAG77ce588e1 [2021-10-21 19:11:26,027 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/data/85bade4a6/c35ff8d79c3c481a8fc948347e71a321 [2021-10-21 19:11:26,030 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:11:26,031 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 19:11:26,046 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:11:26,046 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:11:26,049 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:11:26,050 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:11:26" (1/1) ... [2021-10-21 19:11:26,051 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1df97206 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:11:26, skipping insertion in model container [2021-10-21 19:11:26,051 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:11:26" (1/1) ... [2021-10-21 19:11:26,058 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:11:26,070 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:11:26,239 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_90059940-f947-4b52-a219-ac2fc9671b0c/sv-benchmarks/c/recursive-simple/fibo_10-2.c[743,756] [2021-10-21 19:11:26,240 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:11:26,249 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:11:26,264 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_90059940-f947-4b52-a219-ac2fc9671b0c/sv-benchmarks/c/recursive-simple/fibo_10-2.c[743,756] [2021-10-21 19:11:26,265 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:11:26,278 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:11:26,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:11:26 WrapperNode [2021-10-21 19:11:26,279 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:11:26,280 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 19:11:26,280 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 19:11:26,280 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 19:11:26,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:11:26" (1/1) ... [2021-10-21 19:11:26,294 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:11:26" (1/1) ... [2021-10-21 19:11:26,311 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 19:11:26,312 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:11:26,312 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:11:26,312 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:11:26,321 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:11:26" (1/1) ... [2021-10-21 19:11:26,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:11:26" (1/1) ... [2021-10-21 19:11:26,322 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:11:26" (1/1) ... [2021-10-21 19:11:26,323 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:11:26" (1/1) ... [2021-10-21 19:11:26,326 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:11:26" (1/1) ... [2021-10-21 19:11:26,328 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:11:26" (1/1) ... [2021-10-21 19:11:26,329 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:11:26" (1/1) ... [2021-10-21 19:11:26,331 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:11:26,332 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:11:26,332 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:11:26,332 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:11:26,333 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:11:26" (1/1) ... [2021-10-21 19:11:26,341 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:26,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:26,368 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:26,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-10-21 19:11:26,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:11:26,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:11:26,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:11:26,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:11:26,414 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2021-10-21 19:11:26,415 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2021-10-21 19:11:26,600 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:11:26,600 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-21 19:11:26,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:11:26 BoogieIcfgContainer [2021-10-21 19:11:26,602 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:11:26,604 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-10-21 19:11:26,604 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-10-21 19:11:26,607 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-10-21 19:11:26,608 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-21 19:11:26,608 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 21.10 07:11:26" (1/3) ... [2021-10-21 19:11:26,610 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3d01b955 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 21.10 07:11:26, skipping insertion in model container [2021-10-21 19:11:26,610 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-21 19:11:26,611 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:11:26" (2/3) ... [2021-10-21 19:11:26,611 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3d01b955 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 21.10 07:11:26, skipping insertion in model container [2021-10-21 19:11:26,611 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-21 19:11:26,611 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:11:26" (3/3) ... [2021-10-21 19:11:26,613 INFO L389 chiAutomizerObserver]: Analyzing ICFG fibo_10-2.c [2021-10-21 19:11:26,659 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-10-21 19:11:26,659 INFO L360 BuchiCegarLoop]: Hoare is false [2021-10-21 19:11:26,659 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-10-21 19:11:26,659 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-21 19:11:26,660 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-21 19:11:26,660 INFO L364 BuchiCegarLoop]: Difference is false [2021-10-21 19:11:26,660 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-21 19:11:26,660 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-10-21 19:11:26,684 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 19:11:26,722 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-21 19:11:26,722 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:11:26,722 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:11:26,729 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-10-21 19:11:26,729 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-21 19:11:26,729 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-10-21 19:11:26,729 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 19:11:26,733 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-21 19:11:26,733 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:11:26,733 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:11:26,734 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-10-21 19:11:26,734 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-21 19:11:26,741 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(12);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 := 10; 6#L27true call main_#t~ret9 := fibo(main_~x~0);< 7#fiboENTRYtrue [2021-10-21 19:11:26,741 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 19:11:26,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:26,763 INFO L82 PathProgramCache]: Analyzing trace with hash 29883, now seen corresponding path program 1 times [2021-10-21 19:11:26,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:26,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646828169] [2021-10-21 19:11:26,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:26,775 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:26,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:11:26,911 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:11:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:11:26,960 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:11:26,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:26,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1450956, now seen corresponding path program 1 times [2021-10-21 19:11:26,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:26,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820195858] [2021-10-21 19:11:26,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:26,963 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:26,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:11:26,969 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:11:26,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:11:26,975 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:11:26,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:26,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1828301702, now seen corresponding path program 1 times [2021-10-21 19:11:26,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:26,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204120863] [2021-10-21 19:11:26,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:26,978 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:26,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:11:26,996 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:11:27,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:11:27,043 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:11:27,212 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 19:11:27,213 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 19:11:27,213 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 19:11:27,213 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 19:11:27,213 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-21 19:11:27,213 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:27,214 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 19:11:27,214 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 19:11:27,214 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration1_Loop [2021-10-21 19:11:27,214 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 19:11:27,214 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 19:11:27,230 INFO 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 19:11:27,236 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:11:27,239 INFO 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 19:11:27,242 INFO 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 19:11:27,244 INFO 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 19:11:27,301 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 19:11:27,302 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-21 19:11:27,304 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:27,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:27,307 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:27,316 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 19:11:27,316 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:11:27,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-10-21 19:11:27,337 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 19:11:27,337 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 19:11:27,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:27,360 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:27,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:27,362 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:27,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-10-21 19:11:27,384 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 19:11:27,384 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:11:27,396 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 19:11:27,396 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 19:11:27,425 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Ended with exit code 0 [2021-10-21 19:11:27,425 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:27,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:27,426 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:27,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-10-21 19:11:27,436 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 19:11:27,436 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:11:27,459 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 19:11:27,459 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 19:11:27,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:27,485 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:27,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:27,487 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:27,489 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 19:11:27,489 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:11:27,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-10-21 19:11:27,507 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 19:11:27,507 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 19:11:27,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:27,530 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:27,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:27,532 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:27,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-10-21 19:11:27,534 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 19:11:27,534 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:11:27,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:27,589 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:27,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:27,590 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:27,604 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-21 19:11:27,604 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:11:27,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-10-21 19:11:27,681 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-21 19:11:27,683 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Ended with exit code 0 [2021-10-21 19:11:27,684 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 19:11:27,684 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 19:11:27,684 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 19:11:27,684 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 19:11:27,684 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-21 19:11:27,684 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:27,684 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 19:11:27,684 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 19:11:27,684 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration1_Loop [2021-10-21 19:11:27,684 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 19:11:27,684 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 19:11:27,686 INFO 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 19:11:27,697 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:11:27,711 INFO 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 19:11:27,715 INFO 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 19:11:27,718 INFO 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 19:11:27,776 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 19:11:27,781 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-21 19:11:27,782 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:27,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:27,784 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:27,793 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 19:11:27,803 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:11:27,803 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:11:27,804 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:11:27,804 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:11:27,804 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:11:27,806 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:11:27,806 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:11:27,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-10-21 19:11:27,826 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:11:27,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:27,862 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:27,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:27,864 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:27,870 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 19:11:27,879 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:11:27,879 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:11:27,879 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:11:27,879 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:11:27,879 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:11:27,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-10-21 19:11:27,880 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:11:27,880 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:11:27,895 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:11:27,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:27,932 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:27,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:27,934 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:27,940 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 19:11:27,949 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:11:27,949 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:11:27,949 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:11:27,949 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:11:27,949 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:11:27,950 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:11:27,950 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:11:27,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-10-21 19:11:27,967 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:11:27,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:27,992 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:27,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:27,993 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:27,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-10-21 19:11:27,997 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 19:11:28,006 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:11:28,007 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:11:28,007 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:11:28,007 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:11:28,007 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:11:28,008 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:11:28,009 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:11:28,012 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:11:28,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:28,032 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:28,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:28,034 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:28,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-10-21 19:11:28,039 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 19:11:28,047 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:11:28,047 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:11:28,048 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:11:28,048 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:11:28,048 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:11:28,049 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:11:28,049 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:11:28,059 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-21 19:11:28,067 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-21 19:11:28,067 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-21 19:11:28,069 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:28,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:28,094 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:28,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-10-21 19:11:28,097 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-21 19:11:28,099 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-21 19:11:28,099 INFO L513 LassoAnalysis]: Proved termination. [2021-10-21 19:11:28,100 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2021-10-21 19:11:28,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:28,132 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-21 19:11:28,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:28,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:28,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 19:11:28,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:28,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:28,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:11:28,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:28,278 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 19:11:28,329 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 19:11:28,330 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 19:11:28,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:28,471 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 19:11:28,476 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 19:11:28,478 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 19:11:28,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2021-10-21 19:11:28,480 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2021-10-21 19:11:28,484 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:11:28,484 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2021-10-21 19:11:28,485 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:11:28,485 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2021-10-21 19:11:28,486 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:11:28,487 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 48 states and 60 transitions. [2021-10-21 19:11:28,498 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-21 19:11:28,507 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 48 states to 25 states and 34 transitions. [2021-10-21 19:11:28,508 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2021-10-21 19:11:28,509 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2021-10-21 19:11:28,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2021-10-21 19:11:28,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 19:11:28,510 INFO L681 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-10-21 19:11:28,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2021-10-21 19:11:28,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2021-10-21 19:11:28,542 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 19:11:28,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2021-10-21 19:11:28,547 INFO L704 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-10-21 19:11:28,547 INFO L587 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-10-21 19:11:28,547 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-10-21 19:11:28,547 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2021-10-21 19:11:28,549 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-21 19:11:28,550 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:11:28,550 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:11:28,551 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:28,551 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:28,552 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(12);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 := 10; 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 19:11:28,552 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 19:11:28,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:28,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1181449843, now seen corresponding path program 1 times [2021-10-21 19:11:28,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:28,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615345471] [2021-10-21 19:11:28,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:28,555 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:28,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:28,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:11:28,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:28,671 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 19:11:28,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:28,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615345471] [2021-10-21 19:11:28,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615345471] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:11:28,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:11:28,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:11:28,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295745737] [2021-10-21 19:11:28,676 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 19:11:28,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:28,676 INFO L82 PathProgramCache]: Analyzing trace with hash 246097683, now seen corresponding path program 1 times [2021-10-21 19:11:28,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:28,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737553256] [2021-10-21 19:11:28,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:28,677 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:28,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:28,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-10-21 19:11:28,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:28,722 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 19:11:28,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:28,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737553256] [2021-10-21 19:11:28,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737553256] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:11:28,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:11:28,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:11:28,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597906243] [2021-10-21 19:11:28,723 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-21 19:11:28,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:28,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:11:28,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:11:28,728 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 19:11:28,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:28,813 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-10-21 19:11:28,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:11:28,814 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2021-10-21 19:11:28,819 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-21 19:11:28,826 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2021-10-21 19:11:28,826 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2021-10-21 19:11:28,828 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2021-10-21 19:11:28,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2021-10-21 19:11:28,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 19:11:28,829 INFO L681 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-10-21 19:11:28,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2021-10-21 19:11:28,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-21 19:11:28,834 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 19:11:28,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-10-21 19:11:28,837 INFO L704 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-10-21 19:11:28,837 INFO L587 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-10-21 19:11:28,837 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-10-21 19:11:28,837 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2021-10-21 19:11:28,840 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-21 19:11:28,840 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:11:28,840 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:11:28,841 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:28,842 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:28,842 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(12);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 := 10; 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 19:11:28,842 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 19:11:28,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:28,843 INFO L82 PathProgramCache]: Analyzing trace with hash 2029785426, now seen corresponding path program 1 times [2021-10-21 19:11:28,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:28,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198631887] [2021-10-21 19:11:28,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:28,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:28,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:28,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:11:28,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:28,960 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 19:11:28,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:28,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198631887] [2021-10-21 19:11:28,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198631887] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:28,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468692925] [2021-10-21 19:11:28,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:28,962 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:28,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:28,969 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:28,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-21 19:11:29,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:29,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 19:11:29,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:29,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:11:29,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468692925] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:29,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:11:29,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-21 19:11:29,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791026488] [2021-10-21 19:11:29,126 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 19:11:29,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:29,127 INFO L82 PathProgramCache]: Analyzing trace with hash -960881524, now seen corresponding path program 1 times [2021-10-21 19:11:29,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:29,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664179828] [2021-10-21 19:11:29,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:29,127 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:29,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:11:29,132 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:11:29,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:11:29,138 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:11:29,308 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 19:11:29,308 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 19:11:29,308 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 19:11:29,308 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 19:11:29,308 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-21 19:11:29,308 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:29,308 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 19:11:29,308 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 19:11:29,309 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration3_Loop [2021-10-21 19:11:29,309 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 19:11:29,309 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 19:11:29,310 INFO 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 19:11:29,312 INFO 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 19:11:29,319 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:11:29,321 INFO 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 19:11:29,356 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 19:11:29,356 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-21 19:11:29,357 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:29,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:29,360 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:29,368 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 19:11:29,368 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:11:29,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-10-21 19:11:29,392 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 19:11:29,392 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 19:11:29,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:29,424 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:29,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:29,428 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:29,434 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 19:11:29,434 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:11:29,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-10-21 19:11:29,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:29,499 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:29,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:29,500 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:29,508 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-21 19:11:29,508 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:11:29,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-10-21 19:11:30,599 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-21 19:11:30,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Ended with exit code 0 [2021-10-21 19:11:30,605 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 19:11:30,605 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 19:11:30,605 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 19:11:30,605 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 19:11:30,605 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-21 19:11:30,605 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:30,605 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 19:11:30,605 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 19:11:30,605 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration3_Loop [2021-10-21 19:11:30,605 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 19:11:30,605 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 19:11:30,607 INFO 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 19:11:30,621 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:11:30,628 INFO 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 19:11:30,631 INFO 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 19:11:30,670 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 19:11:30,671 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-21 19:11:30,672 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:30,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:30,673 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:30,686 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 19:11:30,695 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:11:30,695 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:11:30,695 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:11:30,696 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:11:30,696 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:11:30,696 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:11:30,697 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:11:30,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-10-21 19:11:30,699 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:11:30,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:30,723 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:30,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:30,724 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:30,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-10-21 19:11:30,744 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 19:11:30,751 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:11:30,751 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:11:30,751 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:11:30,752 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:11:30,752 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:11:30,753 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:11:30,753 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:11:30,767 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-21 19:11:30,771 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-21 19:11:30,771 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-21 19:11:30,772 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:30,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:30,776 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:30,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-10-21 19:11:30,786 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-21 19:11:30,787 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-21 19:11:30,787 INFO L513 LassoAnalysis]: Proved termination. [2021-10-21 19:11:30,787 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2021-10-21 19:11:30,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:30,819 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-21 19:11:30,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:30,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:30,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 19:11:30,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:30,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:30,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 19:11:30,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:31,077 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 19:11:31,078 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 19:11:31,078 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 19:11:31,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:31,325 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 19:11:31,326 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 19:11:31,326 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 19:11:31,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2021-10-21 19:11:31,327 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 10 letters. [2021-10-21 19:11:31,328 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:11:31,328 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 22 letters. Loop has 10 letters. [2021-10-21 19:11:31,329 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:11:31,329 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 20 letters. [2021-10-21 19:11:31,330 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:11:31,330 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 183 transitions. [2021-10-21 19:11:31,337 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-10-21 19:11:31,342 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 108 states and 152 transitions. [2021-10-21 19:11:31,343 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 64 [2021-10-21 19:11:31,343 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2021-10-21 19:11:31,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 152 transitions. [2021-10-21 19:11:31,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 19:11:31,344 INFO L681 BuchiCegarLoop]: Abstraction has 108 states and 152 transitions. [2021-10-21 19:11:31,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states and 152 transitions. [2021-10-21 19:11:31,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2021-10-21 19:11:31,358 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 19:11:31,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2021-10-21 19:11:31,366 INFO L704 BuchiCegarLoop]: Abstraction has 94 states and 126 transitions. [2021-10-21 19:11:31,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:31,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:11:31,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:11:31,370 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 19:11:31,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:31,457 INFO L93 Difference]: Finished difference Result 109 states and 147 transitions. [2021-10-21 19:11:31,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:11:31,458 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 109 states and 147 transitions. [2021-10-21 19:11:31,472 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-10-21 19:11:31,479 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 109 states to 106 states and 144 transitions. [2021-10-21 19:11:31,479 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 69 [2021-10-21 19:11:31,480 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2021-10-21 19:11:31,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 144 transitions. [2021-10-21 19:11:31,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 19:11:31,481 INFO L681 BuchiCegarLoop]: Abstraction has 106 states and 144 transitions. [2021-10-21 19:11:31,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states and 144 transitions. [2021-10-21 19:11:31,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2021-10-21 19:11:31,491 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 19:11:31,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 125 transitions. [2021-10-21 19:11:31,492 INFO L704 BuchiCegarLoop]: Abstraction has 94 states and 125 transitions. [2021-10-21 19:11:31,493 INFO L587 BuchiCegarLoop]: Abstraction has 94 states and 125 transitions. [2021-10-21 19:11:31,493 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-10-21 19:11:31,493 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 94 states and 125 transitions. [2021-10-21 19:11:31,494 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-10-21 19:11:31,494 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:11:31,494 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:11:31,496 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:31,496 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2021-10-21 19:11:31,496 INFO L791 eck$LassoCheckResult]: Stem: 736#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 737#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 743#L27 call main_#t~ret9 := fibo(main_~x~0);< 754#fiboENTRY ~n := #in~n; 798#L8 assume !(~n < 1); 778#L10 assume !(1 == ~n); 742#L13 call #t~ret7 := fibo(~n - 1);< 744#fiboENTRY ~n := #in~n; 759#L8 assume !(~n < 1); 775#L10 assume !(1 == ~n); 758#L13 call #t~ret7 := fibo(~n - 1);< 744#fiboENTRY ~n := #in~n; 759#L8 assume !(~n < 1); 775#L10 assume !(1 == ~n); 758#L13 call #t~ret7 := fibo(~n - 1);< 744#fiboENTRY ~n := #in~n; 760#L8 assume !(~n < 1); 797#L10 assume 1 == ~n;#res := 1; 796#fiboFINAL assume true; 795#fiboEXIT >#33#return; 756#L13-1 call #t~ret8 := fibo(~n - 2);< 755#fiboENTRY ~n := #in~n; 757#L8 assume ~n < 1;#res := 0; 774#fiboFINAL assume true; 825#fiboEXIT >#35#return; 821#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 819#fiboFINAL assume true; 817#fiboEXIT >#33#return; 739#L13-1 [2021-10-21 19:11:31,496 INFO L793 eck$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 19:11:31,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:31,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1557778097, now seen corresponding path program 1 times [2021-10-21 19:11:31,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:31,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906127517] [2021-10-21 19:11:31,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:31,498 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:31,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:31,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-21 19:11:31,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:31,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 19:11:31,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:31,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:11:31,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:31,650 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 19:11:31,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:31,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906127517] [2021-10-21 19:11:31,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906127517] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:31,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573713535] [2021-10-21 19:11:31,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:31,654 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:31,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:31,658 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:31,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-21 19:11:31,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:31,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-21 19:11:31,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:31,827 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 19:11:31,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573713535] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:31,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:11:31,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-10-21 19:11:31,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542500158] [2021-10-21 19:11:31,830 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 19:11:31,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:31,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1616897917, now seen corresponding path program 1 times [2021-10-21 19:11:31,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:31,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877447286] [2021-10-21 19:11:31,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:31,831 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:31,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:31,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-10-21 19:11:31,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:31,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 19:11:31,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:31,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:11:31,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:31,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 19:11:31,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:31,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:11:31,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:31,984 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 19:11:31,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:31,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877447286] [2021-10-21 19:11:31,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877447286] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:31,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705686239] [2021-10-21 19:11:31,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:31,986 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:31,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:31,987 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:32,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-21 19:11:32,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:32,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 19:11:32,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:32,181 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 19:11:32,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705686239] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:32,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:11:32,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-10-21 19:11:32,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825497364] [2021-10-21 19:11:32,183 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-21 19:11:32,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:32,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:11:32,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:11:32,185 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 19:11:32,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:32,346 INFO L93 Difference]: Finished difference Result 116 states and 158 transitions. [2021-10-21 19:11:32,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:11:32,346 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 116 states and 158 transitions. [2021-10-21 19:11:32,350 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2021-10-21 19:11:32,356 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 116 states to 114 states and 156 transitions. [2021-10-21 19:11:32,357 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2021-10-21 19:11:32,358 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2021-10-21 19:11:32,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 114 states and 156 transitions. [2021-10-21 19:11:32,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 19:11:32,358 INFO L681 BuchiCegarLoop]: Abstraction has 114 states and 156 transitions. [2021-10-21 19:11:32,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states and 156 transitions. [2021-10-21 19:11:32,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-10-21 19:11:32,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 76 states have internal predecessors, (85), 26 states have call successors, (27), 13 states have call predecessors, (27), 18 states have return successors, (44), 24 states have call predecessors, (44), 24 states have call successors, (44) [2021-10-21 19:11:32,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 156 transitions. [2021-10-21 19:11:32,386 INFO L704 BuchiCegarLoop]: Abstraction has 114 states and 156 transitions. [2021-10-21 19:11:32,386 INFO L587 BuchiCegarLoop]: Abstraction has 114 states and 156 transitions. [2021-10-21 19:11:32,386 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-10-21 19:11:32,386 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 114 states and 156 transitions. [2021-10-21 19:11:32,392 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2021-10-21 19:11:32,392 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:11:32,392 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:11:32,396 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:32,396 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [8, 7, 6, 4, 4, 4, 4, 3, 3, 2, 2] [2021-10-21 19:11:32,396 INFO L791 eck$LassoCheckResult]: Stem: 1247#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 1248#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 1265#L27 call main_#t~ret9 := fibo(main_~x~0);< 1266#fiboENTRY ~n := #in~n; 1308#L8 assume !(~n < 1); 1307#L10 assume !(1 == ~n); 1254#L13 call #t~ret7 := fibo(~n - 1);< 1268#fiboENTRY ~n := #in~n; 1269#L8 assume !(~n < 1); 1281#L10 assume !(1 == ~n); 1253#L13 call #t~ret7 := fibo(~n - 1);< 1255#fiboENTRY ~n := #in~n; 1305#L8 assume !(~n < 1); 1303#L10 assume !(1 == ~n); 1257#L13 call #t~ret7 := fibo(~n - 1);< 1255#fiboENTRY ~n := #in~n; 1305#L8 assume !(~n < 1); 1303#L10 assume !(1 == ~n); 1257#L13 call #t~ret7 := fibo(~n - 1);< 1255#fiboENTRY ~n := #in~n; 1306#L8 assume !(~n < 1); 1304#L10 assume 1 == ~n;#res := 1; 1302#fiboFINAL assume true; 1301#fiboEXIT >#33#return; 1275#L13-1 call #t~ret8 := fibo(~n - 2);< 1299#fiboENTRY ~n := #in~n; 1360#L8 assume ~n < 1;#res := 0; 1358#fiboFINAL assume true; 1274#fiboEXIT >#35#return; 1256#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1258#fiboFINAL assume true; 1270#fiboEXIT >#33#return; 1332#L13-1 [2021-10-21 19:11:32,396 INFO L793 eck$LassoCheckResult]: Loop: 1332#L13-1 call #t~ret8 := fibo(~n - 2);< 1342#fiboENTRY ~n := #in~n; 1346#L8 assume !(~n < 1); 1344#L10 assume !(1 == ~n); 1331#L13 call #t~ret7 := fibo(~n - 1);< 1342#fiboENTRY ~n := #in~n; 1346#L8 assume !(~n < 1); 1344#L10 assume !(1 == ~n); 1331#L13 call #t~ret7 := fibo(~n - 1);< 1342#fiboENTRY ~n := #in~n; 1346#L8 assume !(~n < 1); 1344#L10 assume !(1 == ~n); 1331#L13 call #t~ret7 := fibo(~n - 1);< 1342#fiboENTRY ~n := #in~n; 1346#L8 assume !(~n < 1); 1344#L10 assume 1 == ~n;#res := 1; 1283#fiboFINAL assume true; 1330#fiboEXIT >#33#return; 1251#L13-1 call #t~ret8 := fibo(~n - 2);< 1252#fiboENTRY ~n := #in~n; 1267#L8 assume ~n < 1;#res := 0; 1309#fiboFINAL assume true; 1348#fiboEXIT >#35#return; 1337#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1345#fiboFINAL assume true; 1340#fiboEXIT >#33#return; 1332#L13-1 call #t~ret8 := fibo(~n - 2);< 1342#fiboENTRY ~n := #in~n; 1346#L8 assume !(~n < 1); 1344#L10 assume !(1 == ~n); 1331#L13 call #t~ret7 := fibo(~n - 1);< 1342#fiboENTRY ~n := #in~n; 1346#L8 assume !(~n < 1); 1344#L10 assume 1 == ~n;#res := 1; 1283#fiboFINAL assume true; 1330#fiboEXIT >#33#return; 1251#L13-1 call #t~ret8 := fibo(~n - 2);< 1252#fiboENTRY ~n := #in~n; 1267#L8 assume ~n < 1;#res := 0; 1309#fiboFINAL assume true; 1348#fiboEXIT >#35#return; 1337#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1345#fiboFINAL assume true; 1340#fiboEXIT >#35#return; 1335#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1343#fiboFINAL assume true; 1338#fiboEXIT >#33#return; 1332#L13-1 [2021-10-21 19:11:32,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:32,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1730264506, now seen corresponding path program 2 times [2021-10-21 19:11:32,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:32,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348601917] [2021-10-21 19:11:32,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:32,398 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:32,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:32,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-21 19:11:32,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:32,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 19:11:32,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:32,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:11:32,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:32,562 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-21 19:11:32,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:32,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348601917] [2021-10-21 19:11:32,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348601917] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:32,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127484993] [2021-10-21 19:11:32,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:11:32,564 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:32,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:32,571 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:32,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-21 19:11:32,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:11:32,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:11:32,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-21 19:11:32,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:32,781 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-21 19:11:32,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127484993] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:32,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:11:32,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-10-21 19:11:32,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769732940] [2021-10-21 19:11:32,788 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 19:11:32,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:32,788 INFO L82 PathProgramCache]: Analyzing trace with hash 564146419, now seen corresponding path program 2 times [2021-10-21 19:11:32,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:32,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471371990] [2021-10-21 19:11:32,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:32,794 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:32,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:32,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-10-21 19:11:32,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:32,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 19:11:32,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:32,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 19:11:32,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:32,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:11:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:32,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-10-21 19:11:32,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:32,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 19:11:32,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:32,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:11:32,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:32,988 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 19:11:32,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:32,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471371990] [2021-10-21 19:11:32,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471371990] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:32,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184573031] [2021-10-21 19:11:32,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:11:32,990 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:32,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:32,995 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:33,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-21 19:11:33,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:11:33,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:11:33,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-21 19:11:33,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:33,249 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 19:11:33,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184573031] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:33,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:11:33,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-10-21 19:11:33,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875018892] [2021-10-21 19:11:33,250 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-21 19:11:33,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:33,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-21 19:11:33,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:11:33,251 INFO L87 Difference]: Start difference. First operand 114 states and 156 transitions. cyclomatic complexity: 48 Second operand has 14 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-21 19:11:33,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:33,492 INFO L93 Difference]: Finished difference Result 128 states and 172 transitions. [2021-10-21 19:11:33,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 19:11:33,492 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 128 states and 172 transitions. [2021-10-21 19:11:33,495 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2021-10-21 19:11:33,498 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 128 states to 126 states and 170 transitions. [2021-10-21 19:11:33,498 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 85 [2021-10-21 19:11:33,499 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 85 [2021-10-21 19:11:33,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 126 states and 170 transitions. [2021-10-21 19:11:33,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 19:11:33,500 INFO L681 BuchiCegarLoop]: Abstraction has 126 states and 170 transitions. [2021-10-21 19:11:33,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states and 170 transitions. [2021-10-21 19:11:33,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-10-21 19:11:33,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 78 states have (on average 1.1923076923076923) internal successors, (93), 84 states have internal predecessors, (93), 29 states have call successors, (30), 15 states have call predecessors, (30), 19 states have return successors, (47), 26 states have call predecessors, (47), 27 states have call successors, (47) [2021-10-21 19:11:33,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 170 transitions. [2021-10-21 19:11:33,522 INFO L704 BuchiCegarLoop]: Abstraction has 126 states and 170 transitions. [2021-10-21 19:11:33,522 INFO L587 BuchiCegarLoop]: Abstraction has 126 states and 170 transitions. [2021-10-21 19:11:33,522 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-10-21 19:11:33,522 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 126 states and 170 transitions. [2021-10-21 19:11:33,524 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2021-10-21 19:11:33,524 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:11:33,524 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:11:33,525 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [7, 6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:33,525 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-10-21 19:11:33,526 INFO L791 eck$LassoCheckResult]: Stem: 1880#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 1881#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 1896#L27 call main_#t~ret9 := fibo(main_~x~0);< 1897#fiboENTRY ~n := #in~n; 1952#L8 assume !(~n < 1); 1920#L10 assume !(1 == ~n); 1894#L13 call #t~ret7 := fibo(~n - 1);< 1903#fiboENTRY ~n := #in~n; 1904#L8 assume !(~n < 1); 1912#L10 assume !(1 == ~n); 1893#L13 call #t~ret7 := fibo(~n - 1);< 1895#fiboENTRY ~n := #in~n; 1951#L8 assume !(~n < 1); 1950#L10 assume !(1 == ~n); 1883#L13 call #t~ret7 := fibo(~n - 1);< 1943#fiboENTRY ~n := #in~n; 1949#L8 assume !(~n < 1); 1948#L10 assume !(1 == ~n); 1884#L13 call #t~ret7 := fibo(~n - 1);< 1943#fiboENTRY ~n := #in~n; 1949#L8 assume !(~n < 1); 1948#L10 assume !(1 == ~n); 1884#L13 call #t~ret7 := fibo(~n - 1);< 1943#fiboENTRY ~n := #in~n; 1947#L8 assume !(~n < 1); 1946#L10 assume 1 == ~n;#res := 1; 1944#fiboFINAL assume true; 1942#fiboEXIT >#33#return; 1906#L13-1 call #t~ret8 := fibo(~n - 2);< 1938#fiboENTRY ~n := #in~n; 2005#L8 assume ~n < 1;#res := 0; 2003#fiboFINAL assume true; 1905#fiboEXIT >#35#return; 1882#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1885#fiboFINAL assume true; 1898#fiboEXIT >#33#return; 1914#L13-1 [2021-10-21 19:11:33,526 INFO L793 eck$LassoCheckResult]: Loop: 1914#L13-1 call #t~ret8 := fibo(~n - 2);< 1984#fiboENTRY ~n := #in~n; 2004#L8 assume !(~n < 1); 1913#L10 assume !(1 == ~n); 1915#L13 call #t~ret7 := fibo(~n - 1);< 1984#fiboENTRY ~n := #in~n; 2004#L8 assume !(~n < 1); 1913#L10 assume !(1 == ~n); 1915#L13 call #t~ret7 := fibo(~n - 1);< 1984#fiboENTRY ~n := #in~n; 2004#L8 assume !(~n < 1); 1913#L10 assume 1 == ~n;#res := 1; 1919#fiboFINAL assume true; 1990#fiboEXIT >#33#return; 1890#L13-1 call #t~ret8 := fibo(~n - 2);< 1892#fiboENTRY ~n := #in~n; 1993#L8 assume ~n < 1;#res := 0; 1994#fiboFINAL assume true; 1989#fiboEXIT >#35#return; 1975#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1987#fiboFINAL assume true; 1978#fiboEXIT >#33#return; 1914#L13-1 [2021-10-21 19:11:33,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:33,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1885019301, now seen corresponding path program 3 times [2021-10-21 19:11:33,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:33,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864705058] [2021-10-21 19:11:33,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:33,526 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:33,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:33,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:11:33,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:33,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 19:11:33,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:33,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:11:33,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:33,689 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-21 19:11:33,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:33,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864705058] [2021-10-21 19:11:33,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864705058] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:33,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509611040] [2021-10-21 19:11:33,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:11:33,693 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:33,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:33,694 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:33,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-21 19:11:33,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-10-21 19:11:33,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:11:33,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-21 19:11:33,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:33,944 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 5 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-21 19:11:33,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509611040] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:33,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:11:33,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 16 [2021-10-21 19:11:33,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989609126] [2021-10-21 19:11:33,945 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 19:11:33,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:33,946 INFO L82 PathProgramCache]: Analyzing trace with hash 780094678, now seen corresponding path program 3 times [2021-10-21 19:11:33,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:33,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054802022] [2021-10-21 19:11:33,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:33,946 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:33,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:11:33,953 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:11:33,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:11:33,968 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:11:34,285 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 19:11:34,285 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 19:11:34,285 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 19:11:34,285 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 19:11:34,285 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-21 19:11:34,285 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:34,285 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 19:11:34,286 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 19:11:34,286 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration6_Loop [2021-10-21 19:11:34,286 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 19:11:34,286 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 19:11:34,286 INFO 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 19:11:34,289 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:11:34,299 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:11:34,301 INFO 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 19:11:34,361 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 19:11:34,361 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-21 19:11:34,362 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:34,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:34,363 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:34,371 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 19:11:34,371 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:11:34,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2021-10-21 19:11:34,396 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 19:11:34,396 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 19:11:34,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:34,427 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:34,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:34,428 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:34,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-10-21 19:11:34,430 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 19:11:34,430 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:11:34,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:34,462 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:34,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:34,463 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:34,465 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-21 19:11:34,465 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:11:34,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-10-21 19:11:35,741 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-21 19:11:35,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:35,754 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 19:11:35,755 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 19:11:35,755 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 19:11:35,755 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 19:11:35,755 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-21 19:11:35,755 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:35,755 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 19:11:35,755 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 19:11:35,755 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration6_Loop [2021-10-21 19:11:35,755 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 19:11:35,755 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 19:11:35,756 INFO 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 19:11:35,758 INFO 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 19:11:35,769 INFO 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 19:11:35,771 INFO 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 19:11:35,834 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 19:11:35,835 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-21 19:11:35,835 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:35,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:35,837 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:35,845 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 19:11:35,854 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:11:35,855 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:11:35,855 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:11:35,855 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:11:35,855 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:11:35,858 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:11:35,858 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:11:35,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2021-10-21 19:11:35,879 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:11:35,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:35,913 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:35,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:35,916 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:35,918 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 19:11:35,927 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:11:35,927 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:11:35,927 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:11:35,928 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:11:35,928 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:11:35,929 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:11:35,929 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:11:35,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2021-10-21 19:11:35,951 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-21 19:11:35,955 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-21 19:11:35,955 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-21 19:11:35,956 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:35,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:35,957 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:35,959 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-21 19:11:35,959 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-21 19:11:35,959 INFO L513 LassoAnalysis]: Proved termination. [2021-10-21 19:11:35,959 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2021-10-21 19:11:35,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2021-10-21 19:11:35,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Ended with exit code 0 [2021-10-21 19:11:35,994 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-21 19:11:36,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:36,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:36,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-21 19:11:36,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:36,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:36,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 19:11:36,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:36,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:36,742 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-21 19:11:36,742 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2021-10-21 19:11:36,743 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 126 states and 170 transitions. cyclomatic complexity: 50 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-21 19:11:36,978 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 126 states and 170 transitions. cyclomatic complexity: 50. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 259 states and 358 transitions. Complement of second has 45 states. [2021-10-21 19:11:36,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2021-10-21 19:11:36,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-21 19:11:36,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 41 transitions. [2021-10-21 19:11:36,980 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 36 letters. Loop has 22 letters. [2021-10-21 19:11:36,981 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:11:36,981 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-21 19:11:36,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:37,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:37,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-21 19:11:37,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:37,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:37,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 19:11:37,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:37,610 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-21 19:11:37,611 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 7 loop predicates [2021-10-21 19:11:37,612 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 126 states and 170 transitions. cyclomatic complexity: 50 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-21 19:11:37,768 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 126 states and 170 transitions. cyclomatic complexity: 50. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 320 states and 431 transitions. Complement of second has 25 states. [2021-10-21 19:11:37,768 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 19:11:37,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-21 19:11:37,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 24 transitions. [2021-10-21 19:11:37,769 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 36 letters. Loop has 22 letters. [2021-10-21 19:11:37,770 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:11:37,770 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-21 19:11:37,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:37,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:37,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-21 19:11:37,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:38,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:38,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 19:11:38,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:38,377 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-21 19:11:38,379 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2021-10-21 19:11:38,379 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 126 states and 170 transitions. cyclomatic complexity: 50 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-21 19:11:38,669 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 126 states and 170 transitions. cyclomatic complexity: 50. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 1146 states and 1598 transitions. Complement of second has 138 states. [2021-10-21 19:11:38,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2021-10-21 19:11:38,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-21 19:11:38,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 46 transitions. [2021-10-21 19:11:38,671 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 36 letters. Loop has 22 letters. [2021-10-21 19:11:38,677 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:11:38,677 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 58 letters. Loop has 22 letters. [2021-10-21 19:11:38,678 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:11:38,678 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 36 letters. Loop has 44 letters. [2021-10-21 19:11:38,679 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:11:38,680 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1146 states and 1598 transitions. [2021-10-21 19:11:38,703 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 58 [2021-10-21 19:11:38,723 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1146 states to 652 states and 989 transitions. [2021-10-21 19:11:38,724 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 262 [2021-10-21 19:11:38,726 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 292 [2021-10-21 19:11:38,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 652 states and 989 transitions. [2021-10-21 19:11:38,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 19:11:38,726 INFO L681 BuchiCegarLoop]: Abstraction has 652 states and 989 transitions. [2021-10-21 19:11:38,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states and 989 transitions. [2021-10-21 19:11:38,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 486. [2021-10-21 19:11:38,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 296 states have (on average 1.1993243243243243) internal successors, (355), 317 states have internal predecessors, (355), 112 states have call successors, (126), 58 states have call predecessors, (126), 78 states have return successors, (217), 110 states have call predecessors, (217), 108 states have call successors, (217) [2021-10-21 19:11:38,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 698 transitions. [2021-10-21 19:11:38,780 INFO L704 BuchiCegarLoop]: Abstraction has 486 states and 698 transitions. [2021-10-21 19:11:38,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:38,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-21 19:11:38,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:11:38,781 INFO L87 Difference]: Start difference. First operand 486 states and 698 transitions. Second operand has 17 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 11 states have internal predecessors, (31), 8 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-21 19:11:39,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:39,016 INFO L93 Difference]: Finished difference Result 296 states and 375 transitions. [2021-10-21 19:11:39,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 19:11:39,016 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 296 states and 375 transitions. [2021-10-21 19:11:39,022 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-21 19:11:39,032 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 296 states to 270 states and 344 transitions. [2021-10-21 19:11:39,032 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 134 [2021-10-21 19:11:39,033 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 137 [2021-10-21 19:11:39,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 270 states and 344 transitions. [2021-10-21 19:11:39,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 19:11:39,033 INFO L681 BuchiCegarLoop]: Abstraction has 270 states and 344 transitions. [2021-10-21 19:11:39,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states and 344 transitions. [2021-10-21 19:11:39,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 229. [2021-10-21 19:11:39,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 141 states have (on average 1.1205673758865249) internal successors, (158), 148 states have internal predecessors, (158), 54 states have call successors, (58), 30 states have call predecessors, (58), 34 states have return successors, (77), 50 states have call predecessors, (77), 48 states have call successors, (77) [2021-10-21 19:11:39,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 293 transitions. [2021-10-21 19:11:39,044 INFO L704 BuchiCegarLoop]: Abstraction has 229 states and 293 transitions. [2021-10-21 19:11:39,044 INFO L587 BuchiCegarLoop]: Abstraction has 229 states and 293 transitions. [2021-10-21 19:11:39,044 INFO L425 BuchiCegarLoop]: ======== Iteration 7============ [2021-10-21 19:11:39,044 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 229 states and 293 transitions. [2021-10-21 19:11:39,046 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-21 19:11:39,046 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:11:39,046 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:11:39,050 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [10, 9, 8, 8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:39,050 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-21 19:11:39,052 INFO L791 eck$LassoCheckResult]: Stem: 5471#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(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 5472#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 5490#L27 call main_#t~ret9 := fibo(main_~x~0);< 5491#fiboENTRY ~n := #in~n; 5545#L8 assume !(~n < 1); 5544#L10 assume !(1 == ~n); 5540#L13 call #t~ret7 := fibo(~n - 1);< 5543#fiboENTRY ~n := #in~n; 5542#L8 assume !(~n < 1); 5541#L10 assume !(1 == ~n); 5536#L13 call #t~ret7 := fibo(~n - 1);< 5539#fiboENTRY ~n := #in~n; 5538#L8 assume !(~n < 1); 5537#L10 assume !(1 == ~n); 5532#L13 call #t~ret7 := fibo(~n - 1);< 5534#fiboENTRY ~n := #in~n; 5535#L8 assume !(~n < 1); 5531#L10 assume !(1 == ~n); 5522#L13 call #t~ret7 := fibo(~n - 1);< 5528#fiboENTRY ~n := #in~n; 5530#L8 assume !(~n < 1); 5533#L10 assume !(1 == ~n); 5521#L13 call #t~ret7 := fibo(~n - 1);< 5528#fiboENTRY ~n := #in~n; 5530#L8 assume !(~n < 1); 5533#L10 assume !(1 == ~n); 5521#L13 call #t~ret7 := fibo(~n - 1);< 5528#fiboENTRY ~n := #in~n; 5529#L8 assume !(~n < 1); 5693#L10 assume 1 == ~n;#res := 1; 5692#fiboFINAL assume true; 5691#fiboEXIT >#33#return; 5520#L13-1 call #t~ret8 := fibo(~n - 2);< 5523#fiboENTRY ~n := #in~n; 5697#L8 assume ~n < 1;#res := 0; 5695#fiboFINAL assume true; 5696#fiboEXIT >#35#return; 5511#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 5656#fiboFINAL assume true; 5606#fiboEXIT >#33#return; 5481#L13-1 call #t~ret8 := fibo(~n - 2);< 5592#fiboENTRY ~n := #in~n; 5657#L8 assume !(~n < 1); 5601#L10 assume !(1 == ~n); 5526#L13 call #t~ret7 := fibo(~n - 1);< 5475#fiboENTRY ~n := #in~n; 5524#L8 assume !(~n < 1); 5527#L10 assume !(1 == ~n); 5550#L13 call #t~ret7 := fibo(~n - 1);< 5553#fiboENTRY [2021-10-21 19:11:39,052 INFO L793 eck$LassoCheckResult]: Loop: 5553#fiboENTRY ~n := #in~n; 5567#L8 assume !(~n < 1); 5566#L10 assume !(1 == ~n); 5551#L13 call #t~ret7 := fibo(~n - 1);< 5553#fiboENTRY [2021-10-21 19:11:39,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:39,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1767901880, now seen corresponding path program 4 times [2021-10-21 19:11:39,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:39,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428968480] [2021-10-21 19:11:39,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:39,053 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:39,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:39,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-10-21 19:11:39,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:39,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 19:11:39,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:39,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:11:39,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:39,243 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 61 proven. 91 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-21 19:11:39,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:39,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428968480] [2021-10-21 19:11:39,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428968480] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:39,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397456659] [2021-10-21 19:11:39,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:11:39,244 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:39,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:39,245 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:39,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-21 19:11:39,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:11:39,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:11:39,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-21 19:11:39,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:39,684 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 61 proven. 91 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-21 19:11:39,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397456659] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:39,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:11:39,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2021-10-21 19:11:39,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780965000] [2021-10-21 19:11:39,685 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 19:11:39,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:39,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1450956, now seen corresponding path program 2 times [2021-10-21 19:11:39,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:39,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277533864] [2021-10-21 19:11:39,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:39,687 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:39,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:11:39,692 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:11:39,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:11:39,694 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:11:39,729 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 19:11:39,729 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 19:11:39,729 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 19:11:39,729 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 19:11:39,730 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-21 19:11:39,730 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:39,730 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 19:11:39,730 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 19:11:39,730 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration7_Loop [2021-10-21 19:11:39,730 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 19:11:39,730 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 19:11:39,731 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 19:11:39,734 INFO 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 19:11:39,735 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 19:11:39,736 INFO 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 19:11:39,742 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 19:11:39,769 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 19:11:39,769 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-21 19:11:39,769 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:39,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:39,770 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:39,780 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 19:11:39,780 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:11:39,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2021-10-21 19:11:39,803 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 19:11:39,804 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 19:11:39,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:39,836 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:39,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:39,836 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:39,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2021-10-21 19:11:39,847 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 19:11:39,847 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:11:39,855 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 19:11:39,855 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 19:11:39,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Ended with exit code 0 [2021-10-21 19:11:39,881 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:39,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:39,881 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:39,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2021-10-21 19:11:39,883 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 19:11:39,883 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:11:39,891 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 19:11:39,891 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 19:11:39,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:39,914 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:39,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:39,915 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:39,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2021-10-21 19:11:39,916 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 19:11:39,916 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:11:39,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:39,963 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:39,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:39,964 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:39,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Waiting until timeout for monitored process [2021-10-21 19:11:39,966 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-21 19:11:39,966 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:11:40,003 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-21 19:11:40,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:40,005 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 19:11:40,005 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 19:11:40,006 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 19:11:40,006 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 19:11:40,006 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-21 19:11:40,006 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:40,006 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 19:11:40,006 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 19:11:40,006 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration7_Loop [2021-10-21 19:11:40,006 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 19:11:40,006 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 19:11:40,007 INFO 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 19:11:40,008 INFO 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 19:11:40,010 INFO 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 19:11:40,011 INFO 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 19:11:40,013 INFO 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 19:11:40,042 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 19:11:40,042 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-21 19:11:40,042 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:40,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:40,043 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:40,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Waiting until timeout for monitored process [2021-10-21 19:11:40,047 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 19:11:40,055 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:11:40,055 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:11:40,055 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:11:40,055 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:11:40,055 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:11:40,056 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:11:40,056 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:11:40,077 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:11:40,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Ended with exit code 0 [2021-10-21 19:11:40,096 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:40,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:40,097 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:40,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Waiting until timeout for monitored process [2021-10-21 19:11:40,098 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 19:11:40,105 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:11:40,106 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:11:40,106 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:11:40,106 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:11:40,106 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:11:40,106 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:11:40,106 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:11:40,109 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:11:40,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:40,132 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:40,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:40,133 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:40,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Waiting until timeout for monitored process [2021-10-21 19:11:40,134 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 19:11:40,142 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:11:40,142 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:11:40,142 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:11:40,142 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:11:40,142 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:11:40,143 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:11:40,143 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:11:40,144 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:11:40,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Ended with exit code 0 [2021-10-21 19:11:40,163 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:40,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:40,164 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:40,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Waiting until timeout for monitored process [2021-10-21 19:11:40,165 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 19:11:40,172 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:11:40,173 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:11:40,173 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:11:40,173 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:11:40,173 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:11:40,173 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:11:40,173 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:11:40,174 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:11:40,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:40,195 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:40,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:40,200 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:40,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Waiting until timeout for monitored process [2021-10-21 19:11:40,209 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 19:11:40,216 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:11:40,217 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:11:40,217 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:11:40,217 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:11:40,217 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:11:40,217 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:11:40,217 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:11:40,231 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-21 19:11:40,233 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-10-21 19:11:40,233 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-10-21 19:11:40,233 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:40,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:40,235 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:40,244 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-21 19:11:40,244 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-21 19:11:40,244 INFO L513 LassoAnalysis]: Proved termination. [2021-10-21 19:11:40,244 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2021-10-21 19:11:40,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Waiting until timeout for monitored process [2021-10-21 19:11:40,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Ended with exit code 0 [2021-10-21 19:11:40,264 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-21 19:11:40,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:40,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:40,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-21 19:11:40,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:40,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:40,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:40,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:11:40,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:40,835 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 19:11:40,836 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2021-10-21 19:11:40,836 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 229 states and 293 transitions. cyclomatic complexity: 68 Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-21 19:11:40,897 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 229 states and 293 transitions. cyclomatic complexity: 68. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 245 states and 309 transitions. Complement of second has 13 states. [2021-10-21 19:11:40,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2021-10-21 19:11:40,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-21 19:11:40,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2021-10-21 19:11:40,898 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 49 letters. Loop has 4 letters. [2021-10-21 19:11:40,898 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:11:40,898 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-21 19:11:40,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:40,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:40,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-21 19:11:40,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:41,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:41,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:11:41,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:41,423 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 19:11:41,424 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2021-10-21 19:11:41,424 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 229 states and 293 transitions. cyclomatic complexity: 68 Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-21 19:11:41,479 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 229 states and 293 transitions. cyclomatic complexity: 68. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 245 states and 309 transitions. Complement of second has 13 states. [2021-10-21 19:11:41,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2021-10-21 19:11:41,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-21 19:11:41,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2021-10-21 19:11:41,480 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 49 letters. Loop has 4 letters. [2021-10-21 19:11:41,482 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:11:41,482 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-21 19:11:41,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:41,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:41,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-21 19:11:41,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:41,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:41,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:11:41,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:41,959 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 19:11:41,959 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2021-10-21 19:11:41,960 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 229 states and 293 transitions. cyclomatic complexity: 68 Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-21 19:11:42,028 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 229 states and 293 transitions. cyclomatic complexity: 68. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 306 states and 372 transitions. Complement of second has 14 states. [2021-10-21 19:11:42,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2021-10-21 19:11:42,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-21 19:11:42,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2021-10-21 19:11:42,030 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 49 letters. Loop has 4 letters. [2021-10-21 19:11:42,031 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:11:42,031 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 53 letters. Loop has 4 letters. [2021-10-21 19:11:42,033 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:11:42,033 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 49 letters. Loop has 8 letters. [2021-10-21 19:11:42,035 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:11:42,036 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 306 states and 372 transitions. [2021-10-21 19:11:42,040 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-21 19:11:42,045 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 306 states to 243 states and 308 transitions. [2021-10-21 19:11:42,045 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 100 [2021-10-21 19:11:42,045 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 103 [2021-10-21 19:11:42,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 243 states and 308 transitions. [2021-10-21 19:11:42,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 19:11:42,046 INFO L681 BuchiCegarLoop]: Abstraction has 243 states and 308 transitions. [2021-10-21 19:11:42,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states and 308 transitions. [2021-10-21 19:11:42,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 237. [2021-10-21 19:11:42,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 149 states have (on average 1.1140939597315436) internal successors, (166), 156 states have internal predecessors, (166), 54 states have call successors, (58), 30 states have call predecessors, (58), 34 states have return successors, (77), 50 states have call predecessors, (77), 48 states have call successors, (77) [2021-10-21 19:11:42,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 301 transitions. [2021-10-21 19:11:42,061 INFO L704 BuchiCegarLoop]: Abstraction has 237 states and 301 transitions. [2021-10-21 19:11:42,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:42,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-21 19:11:42,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:11:42,062 INFO L87 Difference]: Start difference. First operand 237 states and 301 transitions. Second operand has 18 states, 16 states have (on average 2.125) internal successors, (34), 12 states have internal predecessors, (34), 11 states have call successors, (12), 7 states have call predecessors, (12), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-21 19:11:42,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:42,350 INFO L93 Difference]: Finished difference Result 350 states and 452 transitions. [2021-10-21 19:11:42,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-21 19:11:42,350 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 350 states and 452 transitions. [2021-10-21 19:11:42,356 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-21 19:11:42,361 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 350 states to 337 states and 434 transitions. [2021-10-21 19:11:42,362 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 151 [2021-10-21 19:11:42,362 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 151 [2021-10-21 19:11:42,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 337 states and 434 transitions. [2021-10-21 19:11:42,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 19:11:42,367 INFO L681 BuchiCegarLoop]: Abstraction has 337 states and 434 transitions. [2021-10-21 19:11:42,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states and 434 transitions. [2021-10-21 19:11:42,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 298. [2021-10-21 19:11:42,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 185 states have (on average 1.0972972972972972) internal successors, (203), 195 states have internal predecessors, (203), 69 states have call successors, (73), 36 states have call predecessors, (73), 44 states have return successors, (103), 66 states have call predecessors, (103), 62 states have call successors, (103) [2021-10-21 19:11:42,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 379 transitions. [2021-10-21 19:11:42,380 INFO L704 BuchiCegarLoop]: Abstraction has 298 states and 379 transitions. [2021-10-21 19:11:42,380 INFO L587 BuchiCegarLoop]: Abstraction has 298 states and 379 transitions. [2021-10-21 19:11:42,380 INFO L425 BuchiCegarLoop]: ======== Iteration 8============ [2021-10-21 19:11:42,380 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 298 states and 379 transitions. [2021-10-21 19:11:42,383 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-21 19:11:42,383 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:11:42,383 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:11:42,384 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [12, 11, 10, 9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:42,384 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-21 19:11:42,386 INFO L791 eck$LassoCheckResult]: Stem: 7841#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(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 7842#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 7860#L27 call main_#t~ret9 := fibo(main_~x~0);< 7861#fiboENTRY ~n := #in~n; 8035#L8 assume !(~n < 1); 7919#L10 assume !(1 == ~n); 7915#L13 call #t~ret7 := fibo(~n - 1);< 7938#fiboENTRY ~n := #in~n; 7922#L8 assume !(~n < 1); 7923#L10 assume !(1 == ~n); 7914#L13 call #t~ret7 := fibo(~n - 1);< 7916#fiboENTRY ~n := #in~n; 8034#L8 assume !(~n < 1); 8033#L10 assume !(1 == ~n); 7930#L13 call #t~ret7 := fibo(~n - 1);< 7937#fiboENTRY ~n := #in~n; 7962#L8 assume !(~n < 1); 7954#L10 assume !(1 == ~n); 7926#L13 call #t~ret7 := fibo(~n - 1);< 7935#fiboENTRY ~n := #in~n; 7983#L8 assume !(~n < 1); 7982#L10 assume !(1 == ~n); 7944#L13 call #t~ret7 := fibo(~n - 1);< 7957#fiboENTRY ~n := #in~n; 7978#L8 assume !(~n < 1); 7976#L10 assume !(1 == ~n); 7947#L13 call #t~ret7 := fibo(~n - 1);< 7957#fiboENTRY ~n := #in~n; 7978#L8 assume !(~n < 1); 7976#L10 assume !(1 == ~n); 7947#L13 call #t~ret7 := fibo(~n - 1);< 7957#fiboENTRY ~n := #in~n; 7981#L8 assume !(~n < 1); 8032#L10 assume 1 == ~n;#res := 1; 8031#fiboFINAL assume true; 8029#fiboEXIT >#33#return; 8026#L13-1 call #t~ret8 := fibo(~n - 2);< 8027#fiboENTRY ~n := #in~n; 8030#L8 assume ~n < 1;#res := 0; 8028#fiboFINAL assume true; 8025#fiboEXIT >#35#return; 8024#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 8023#fiboFINAL assume true; 8020#fiboEXIT >#33#return; 7946#L13-1 call #t~ret8 := fibo(~n - 2);< 7951#fiboENTRY ~n := #in~n; 8019#L8 assume !(~n < 1); 8015#L10 assume !(1 == ~n); 7897#L13 call #t~ret7 := fibo(~n - 1);< 7988#fiboENTRY ~n := #in~n; 8072#L8 assume !(~n < 1); 8069#L10 assume !(1 == ~n); 7850#L13 call #t~ret7 := fibo(~n - 1);< 7903#fiboENTRY ~n := #in~n; 7881#L8 assume !(~n < 1); 7882#L10 assume !(1 == ~n); 7852#L13 [2021-10-21 19:11:42,386 INFO L793 eck$LassoCheckResult]: Loop: 7852#L13 call #t~ret7 := fibo(~n - 1);< 7903#fiboENTRY ~n := #in~n; 7881#L8 assume !(~n < 1); 7882#L10 assume !(1 == ~n); 7852#L13 [2021-10-21 19:11:42,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:42,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1933126850, now seen corresponding path program 5 times [2021-10-21 19:11:42,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:42,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967790658] [2021-10-21 19:11:42,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:42,388 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:42,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:42,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-10-21 19:11:42,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:42,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 19:11:42,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:42,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:11:42,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:42,612 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 95 proven. 120 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-21 19:11:42,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:42,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967790658] [2021-10-21 19:11:42,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967790658] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:42,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131737096] [2021-10-21 19:11:42,613 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:11:42,614 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:42,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:42,615 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:42,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-10-21 19:11:42,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-10-21 19:11:42,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:11:42,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-21 19:11:42,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:43,215 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 127 proven. 11 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-10-21 19:11:43,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131737096] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:43,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:11:43,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 8] total 24 [2021-10-21 19:11:43,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768338351] [2021-10-21 19:11:43,216 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 19:11:43,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:43,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1893846, now seen corresponding path program 3 times [2021-10-21 19:11:43,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:43,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418759618] [2021-10-21 19:11:43,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:43,218 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:43,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:11:43,226 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:11:43,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:11:43,229 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:11:43,273 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 19:11:43,273 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 19:11:43,273 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 19:11:43,273 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 19:11:43,273 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-21 19:11:43,273 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:43,273 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 19:11:43,273 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 19:11:43,273 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration8_Loop [2021-10-21 19:11:43,273 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 19:11:43,273 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 19:11:43,275 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:11:43,277 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:11:43,278 INFO 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 19:11:43,284 INFO 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 19:11:43,323 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 19:11:43,324 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-21 19:11:43,324 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:43,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:43,325 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:43,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Waiting until timeout for monitored process [2021-10-21 19:11:43,326 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 19:11:43,326 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:11:43,334 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 19:11:43,334 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 19:11:43,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:43,358 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:43,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:43,359 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:43,370 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 19:11:43,370 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:11:43,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Waiting until timeout for monitored process [2021-10-21 19:11:43,402 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 19:11:43,402 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 19:11:43,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:43,434 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:43,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:43,435 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:43,437 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 19:11:43,437 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:11:43,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Waiting until timeout for monitored process [2021-10-21 19:11:43,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:43,474 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:43,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:43,474 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:43,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Waiting until timeout for monitored process [2021-10-21 19:11:43,475 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-21 19:11:43,476 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:11:45,659 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-21 19:11:45,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:45,662 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 19:11:45,662 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 19:11:45,662 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 19:11:45,662 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 19:11:45,663 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-21 19:11:45,663 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:45,663 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 19:11:45,663 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 19:11:45,663 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration8_Loop [2021-10-21 19:11:45,663 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 19:11:45,663 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 19:11:45,663 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:11:45,665 INFO 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 19:11:45,666 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:11:45,672 INFO 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 19:11:45,709 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 19:11:45,709 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-21 19:11:45,709 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:45,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:45,710 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:45,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Waiting until timeout for monitored process [2021-10-21 19:11:45,711 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 19:11:45,718 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:11:45,718 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:11:45,718 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:11:45,719 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:11:45,719 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:11:45,719 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:11:45,719 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:11:45,723 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:11:45,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Ended with exit code 0 [2021-10-21 19:11:45,742 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:45,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:45,743 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:45,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Waiting until timeout for monitored process [2021-10-21 19:11:45,744 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 19:11:45,751 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:11:45,752 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:11:45,752 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:11:45,752 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:11:45,752 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:11:45,752 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:11:45,752 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:11:45,753 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:11:45,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Ended with exit code 0 [2021-10-21 19:11:45,773 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:45,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:45,773 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:45,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Waiting until timeout for monitored process [2021-10-21 19:11:45,775 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 19:11:45,783 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:11:45,784 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:11:45,784 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:11:45,784 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:11:45,784 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:11:45,785 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:11:45,785 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:11:45,787 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-21 19:11:45,791 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-21 19:11:45,792 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-21 19:11:45,792 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:45,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:45,793 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:45,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Waiting until timeout for monitored process [2021-10-21 19:11:45,794 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-21 19:11:45,794 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-21 19:11:45,794 INFO L513 LassoAnalysis]: Proved termination. [2021-10-21 19:11:45,794 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2021-10-21 19:11:45,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:45,813 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-21 19:11:45,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:45,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:45,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-21 19:11:45,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:45,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:46,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:46,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:11:46,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:46,333 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 19:11:46,334 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 19:11:46,334 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 298 states and 379 transitions. cyclomatic complexity: 85 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 19:11:46,389 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 298 states and 379 transitions. cyclomatic complexity: 85. 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 316 states and 398 transitions. Complement of second has 18 states. [2021-10-21 19:11:46,389 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 19:11:46,390 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 19:11:46,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2021-10-21 19:11:46,391 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 56 letters. Loop has 4 letters. [2021-10-21 19:11:46,391 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:11:46,391 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-21 19:11:46,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:46,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:46,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-21 19:11:46,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:46,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:46,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:11:46,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:46,904 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 19:11:46,904 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 19:11:46,905 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 298 states and 379 transitions. cyclomatic complexity: 85 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 19:11:46,999 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 298 states and 379 transitions. cyclomatic complexity: 85. 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 322 states and 404 transitions. Complement of second has 17 states. [2021-10-21 19:11:46,999 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 19:11:47,000 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 19:11:47,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2021-10-21 19:11:47,000 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 56 letters. Loop has 4 letters. [2021-10-21 19:11:47,000 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:11:47,000 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-21 19:11:47,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:47,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:47,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-21 19:11:47,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:47,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:47,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:11:47,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:47,498 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 19:11:47,498 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 19:11:47,498 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 298 states and 379 transitions. cyclomatic complexity: 85 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 19:11:47,571 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 298 states and 379 transitions. cyclomatic complexity: 85. 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 394 states and 497 transitions. Complement of second has 27 states. [2021-10-21 19:11:47,571 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 19:11:47,572 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 19:11:47,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2021-10-21 19:11:47,572 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 56 letters. Loop has 4 letters. [2021-10-21 19:11:47,573 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:11:47,573 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 60 letters. Loop has 4 letters. [2021-10-21 19:11:47,573 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:11:47,573 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 56 letters. Loop has 8 letters. [2021-10-21 19:11:47,574 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:11:47,574 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 394 states and 497 transitions. [2021-10-21 19:11:47,580 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-21 19:11:47,585 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 394 states to 298 states and 379 transitions. [2021-10-21 19:11:47,585 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 113 [2021-10-21 19:11:47,586 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 124 [2021-10-21 19:11:47,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 298 states and 379 transitions. [2021-10-21 19:11:47,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 19:11:47,586 INFO L681 BuchiCegarLoop]: Abstraction has 298 states and 379 transitions. [2021-10-21 19:11:47,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states and 379 transitions. [2021-10-21 19:11:47,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2021-10-21 19:11:47,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 185 states have (on average 1.0972972972972972) internal successors, (203), 195 states have internal predecessors, (203), 69 states have call successors, (73), 36 states have call predecessors, (73), 44 states have return successors, (103), 66 states have call predecessors, (103), 62 states have call successors, (103) [2021-10-21 19:11:47,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 379 transitions. [2021-10-21 19:11:47,597 INFO L704 BuchiCegarLoop]: Abstraction has 298 states and 379 transitions. [2021-10-21 19:11:47,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:47,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-21 19:11:47,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-10-21 19:11:47,598 INFO L87 Difference]: Start difference. First operand 298 states and 379 transitions. Second operand has 24 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 16 states have internal predecessors, (44), 13 states have call successors, (15), 9 states have call predecessors, (15), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-21 19:11:48,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:48,409 INFO L93 Difference]: Finished difference Result 827 states and 1538 transitions. [2021-10-21 19:11:48,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-21 19:11:48,410 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 827 states and 1538 transitions. [2021-10-21 19:11:48,427 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-21 19:11:48,449 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 827 states to 748 states and 1441 transitions. [2021-10-21 19:11:48,449 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 244 [2021-10-21 19:11:48,450 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 254 [2021-10-21 19:11:48,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 748 states and 1441 transitions. [2021-10-21 19:11:48,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 19:11:48,450 INFO L681 BuchiCegarLoop]: Abstraction has 748 states and 1441 transitions. [2021-10-21 19:11:48,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states and 1441 transitions. [2021-10-21 19:11:48,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 637. [2021-10-21 19:11:48,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 372 states have (on average 1.0672043010752688) internal successors, (397), 383 states have internal predecessors, (397), 170 states have call successors, (174), 66 states have call predecessors, (174), 95 states have return successors, (587), 187 states have call predecessors, (587), 158 states have call successors, (587) [2021-10-21 19:11:48,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1158 transitions. [2021-10-21 19:11:48,487 INFO L704 BuchiCegarLoop]: Abstraction has 637 states and 1158 transitions. [2021-10-21 19:11:48,487 INFO L587 BuchiCegarLoop]: Abstraction has 637 states and 1158 transitions. [2021-10-21 19:11:48,487 INFO L425 BuchiCegarLoop]: ======== Iteration 9============ [2021-10-21 19:11:48,487 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 637 states and 1158 transitions. [2021-10-21 19:11:48,492 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-21 19:11:48,493 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:11:48,493 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:11:48,494 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [15, 14, 12, 11, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2021-10-21 19:11:48,494 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-21 19:11:48,494 INFO L791 eck$LassoCheckResult]: Stem: 11182#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(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 11183#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 11246#L27 call main_#t~ret9 := fibo(main_~x~0);< 11247#fiboENTRY ~n := #in~n; 11521#L8 assume !(~n < 1); 11509#L10 assume !(1 == ~n); 11505#L13 call #t~ret7 := fibo(~n - 1);< 11506#fiboENTRY ~n := #in~n; 11612#L8 assume !(~n < 1); 11608#L10 assume !(1 == ~n); 11350#L13 call #t~ret7 := fibo(~n - 1);< 11606#fiboENTRY ~n := #in~n; 11626#L8 assume !(~n < 1); 11625#L10 assume !(1 == ~n); 11206#L13 call #t~ret7 := fibo(~n - 1);< 11355#fiboENTRY ~n := #in~n; 11473#L8 assume !(~n < 1); 11352#L10 assume !(1 == ~n); 11334#L13 call #t~ret7 := fibo(~n - 1);< 11346#fiboENTRY ~n := #in~n; 11358#L8 assume !(~n < 1); 11356#L10 assume !(1 == ~n); 11279#L13 call #t~ret7 := fibo(~n - 1);< 11348#fiboENTRY ~n := #in~n; 11405#L8 assume !(~n < 1); 11403#L10 assume !(1 == ~n); 11284#L13 call #t~ret7 := fibo(~n - 1);< 11347#fiboENTRY ~n := #in~n; 11603#L8 assume !(~n < 1); 11602#L10 assume !(1 == ~n); 11256#L13 call #t~ret7 := fibo(~n - 1);< 11347#fiboENTRY ~n := #in~n; 11603#L8 assume !(~n < 1); 11602#L10 assume !(1 == ~n); 11256#L13 call #t~ret7 := fibo(~n - 1);< 11347#fiboENTRY ~n := #in~n; 11603#L8 assume !(~n < 1); 11602#L10 assume !(1 == ~n); 11256#L13 call #t~ret7 := fibo(~n - 1);< 11347#fiboENTRY ~n := #in~n; 11604#L8 assume !(~n < 1); 11628#L10 assume 1 == ~n;#res := 1; 11627#fiboFINAL assume true; 11624#fiboEXIT >#33#return; 11618#L13-1 call #t~ret8 := fibo(~n - 2);< 11619#fiboENTRY ~n := #in~n; 11622#L8 assume ~n < 1;#res := 0; 11620#fiboFINAL assume true; 11617#fiboEXIT >#35#return; 11616#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 11611#fiboFINAL assume true; 11607#fiboEXIT >#33#return; 11417#L13-1 call #t~ret8 := fibo(~n - 2);< 11420#fiboENTRY ~n := #in~n; 11601#L8 assume !(~n < 1); 11600#L10 assume 1 == ~n;#res := 1; 11407#fiboFINAL assume true; 11416#fiboEXIT >#35#return; 11414#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 11413#fiboFINAL assume true; 11341#fiboEXIT >#33#return; 11271#L13-1 call #t~ret8 := fibo(~n - 2);< 11364#fiboENTRY ~n := #in~n; 11409#L8 assume !(~n < 1); 11406#L10 assume !(1 == ~n); 11397#L13 call #t~ret7 := fibo(~n - 1);< 11398#fiboENTRY ~n := #in~n; 11476#L8 assume !(~n < 1); 11688#L10 assume !(1 == ~n); 11306#L13 call #t~ret7 := fibo(~n - 1);< 11302#fiboENTRY ~n := #in~n; 11309#L8 assume !(~n < 1); 11701#L10 assume !(1 == ~n); 11303#L13 [2021-10-21 19:11:48,495 INFO L793 eck$LassoCheckResult]: Loop: 11303#L13 call #t~ret7 := fibo(~n - 1);< 11302#fiboENTRY ~n := #in~n; 11309#L8 assume !(~n < 1); 11701#L10 assume !(1 == ~n); 11303#L13 [2021-10-21 19:11:48,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:48,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1085253002, now seen corresponding path program 6 times [2021-10-21 19:11:48,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:48,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094780368] [2021-10-21 19:11:48,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:48,504 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:48,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:48,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-10-21 19:11:48,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:48,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 19:11:48,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:48,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-21 19:11:48,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:48,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:11:48,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:48,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-10-21 19:11:48,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:48,797 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 219 proven. 112 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-21 19:11:48,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:48,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094780368] [2021-10-21 19:11:48,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094780368] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:48,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191759577] [2021-10-21 19:11:48,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:11:48,798 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:48,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:48,799 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:48,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-10-21 19:11:49,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-10-21 19:11:49,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:11:49,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-21 19:11:49,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:49,591 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 219 proven. 112 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-21 19:11:49,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191759577] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:49,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:11:49,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 24 [2021-10-21 19:11:49,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036198023] [2021-10-21 19:11:49,592 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 19:11:49,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:49,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1893846, now seen corresponding path program 4 times [2021-10-21 19:11:49,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:49,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796022378] [2021-10-21 19:11:49,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:49,592 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:49,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:11:49,599 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:11:49,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:11:49,601 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:11:49,665 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 19:11:49,665 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 19:11:49,666 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 19:11:49,666 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 19:11:49,666 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-21 19:11:49,666 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:49,666 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 19:11:49,666 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 19:11:49,666 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration9_Loop [2021-10-21 19:11:49,666 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 19:11:49,666 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 19:11:49,666 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:11:49,672 INFO 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 19:11:49,674 INFO 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 19:11:49,676 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:11:49,709 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 19:11:49,709 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-21 19:11:49,710 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:49,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:49,710 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:49,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Waiting until timeout for monitored process [2021-10-21 19:11:49,711 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 19:11:49,711 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:11:49,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Ended with exit code 0 [2021-10-21 19:11:49,748 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:49,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:49,749 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:49,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Waiting until timeout for monitored process [2021-10-21 19:11:49,750 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-21 19:11:49,751 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:11:52,159 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-21 19:11:52,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:52,163 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 19:11:52,164 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 19:11:52,164 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 19:11:52,164 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 19:11:52,164 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-21 19:11:52,164 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:52,164 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 19:11:52,164 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 19:11:52,164 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration9_Loop [2021-10-21 19:11:52,164 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 19:11:52,164 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 19:11:52,165 INFO 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 19:11:52,167 INFO 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 19:11:52,170 INFO 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 19:11:52,172 INFO 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 19:11:52,255 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 19:11:52,256 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-21 19:11:52,256 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:52,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:52,258 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:52,272 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 19:11:52,281 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:11:52,281 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:11:52,282 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:11:52,282 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:11:52,282 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:11:52,283 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:11:52,283 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:11:52,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (56)] Waiting until timeout for monitored process [2021-10-21 19:11:52,295 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:11:52,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (56)] Ended with exit code 0 [2021-10-21 19:11:52,323 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:52,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:52,324 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:52,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (57)] Waiting until timeout for monitored process [2021-10-21 19:11:52,330 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 19:11:52,337 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:11:52,337 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:11:52,338 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:11:52,338 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:11:52,338 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:11:52,338 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:11:52,338 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:11:52,339 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:11:52,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (57)] Ended with exit code 0 [2021-10-21 19:11:52,359 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:52,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:52,359 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:52,360 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 19:11:52,369 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:11:52,370 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:11:52,370 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:11:52,370 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:11:52,370 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:11:52,370 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:11:52,371 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:11:52,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (58)] Waiting until timeout for monitored process [2021-10-21 19:11:52,379 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:11:52,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (58)] Ended with exit code 0 [2021-10-21 19:11:52,400 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:52,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:52,400 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:52,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (59)] Waiting until timeout for monitored process [2021-10-21 19:11:52,402 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 19:11:52,409 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:11:52,409 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:11:52,409 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:11:52,409 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:11:52,409 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:11:52,411 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:11:52,411 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:11:52,433 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-21 19:11:52,448 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-21 19:11:52,448 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-21 19:11:52,448 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:11:52,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:52,450 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:52,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (60)] Waiting until timeout for monitored process [2021-10-21 19:11:52,450 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-21 19:11:52,451 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-21 19:11:52,451 INFO L513 LassoAnalysis]: Proved termination. [2021-10-21 19:11:52,451 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2021-10-21 19:11:52,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (59)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:52,471 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-21 19:11:52,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:52,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:52,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-21 19:11:52,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:53,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (60)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:53,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:11:53,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:53,320 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 19:11:53,320 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 19:11:53,321 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 637 states and 1158 transitions. cyclomatic complexity: 525 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 19:11:53,383 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 637 states and 1158 transitions. cyclomatic complexity: 525. 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 658 states and 1180 transitions. Complement of second has 18 states. [2021-10-21 19:11:53,391 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 19:11:53,392 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 19:11:53,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2021-10-21 19:11:53,392 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 73 letters. Loop has 4 letters. [2021-10-21 19:11:53,393 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:11:53,393 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-21 19:11:53,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:53,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:53,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-21 19:11:53,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:54,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:54,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:11:54,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:54,206 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 19:11:54,207 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 19:11:54,207 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 637 states and 1158 transitions. cyclomatic complexity: 525 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 19:11:54,287 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 637 states and 1158 transitions. cyclomatic complexity: 525. 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 664 states and 1186 transitions. Complement of second has 17 states. [2021-10-21 19:11:54,288 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 19:11:54,288 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 19:11:54,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2021-10-21 19:11:54,288 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 73 letters. Loop has 4 letters. [2021-10-21 19:11:54,289 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:11:54,289 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-21 19:11:54,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:54,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:54,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-21 19:11:54,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:55,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:55,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:11:55,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:55,132 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 19:11:55,133 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 19:11:55,133 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 637 states and 1158 transitions. cyclomatic complexity: 525 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 19:11:55,203 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 637 states and 1158 transitions. cyclomatic complexity: 525. 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 777 states and 1342 transitions. Complement of second has 27 states. [2021-10-21 19:11:55,204 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 19:11:55,204 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 19:11:55,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2021-10-21 19:11:55,205 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 73 letters. Loop has 4 letters. [2021-10-21 19:11:55,205 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:11:55,205 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 77 letters. Loop has 4 letters. [2021-10-21 19:11:55,206 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:11:55,206 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 73 letters. Loop has 8 letters. [2021-10-21 19:11:55,206 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:11:55,207 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 777 states and 1342 transitions. [2021-10-21 19:11:55,223 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-21 19:11:55,243 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 777 states to 637 states and 1158 transitions. [2021-10-21 19:11:55,243 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 199 [2021-10-21 19:11:55,244 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 210 [2021-10-21 19:11:55,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 637 states and 1158 transitions. [2021-10-21 19:11:55,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 19:11:55,244 INFO L681 BuchiCegarLoop]: Abstraction has 637 states and 1158 transitions. [2021-10-21 19:11:55,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states and 1158 transitions. [2021-10-21 19:11:55,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 637. [2021-10-21 19:11:55,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 372 states have (on average 1.0672043010752688) internal successors, (397), 383 states have internal predecessors, (397), 170 states have call successors, (174), 66 states have call predecessors, (174), 95 states have return successors, (587), 187 states have call predecessors, (587), 158 states have call successors, (587) [2021-10-21 19:11:55,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1158 transitions. [2021-10-21 19:11:55,277 INFO L704 BuchiCegarLoop]: Abstraction has 637 states and 1158 transitions. [2021-10-21 19:11:55,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:55,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-21 19:11:55,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2021-10-21 19:11:55,278 INFO L87 Difference]: Start difference. First operand 637 states and 1158 transitions. Second operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 14 states have internal predecessors, (43), 12 states have call successors, (14), 12 states have call predecessors, (14), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-21 19:11:55,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:55,700 INFO L93 Difference]: Finished difference Result 507 states and 606 transitions. [2021-10-21 19:11:55,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-21 19:11:55,700 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 507 states and 606 transitions. [2021-10-21 19:11:55,721 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-21 19:11:55,721 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 507 states to 0 states and 0 transitions. [2021-10-21 19:11:55,721 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-10-21 19:11:55,721 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-10-21 19:11:55,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-10-21 19:11:55,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:11:55,722 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 19:11:55,722 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 19:11:55,722 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 19:11:55,722 INFO L425 BuchiCegarLoop]: ======== Iteration 10============ [2021-10-21 19:11:55,722 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-10-21 19:11:55,722 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-21 19:11:55,722 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-10-21 19:11:55,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 21.10 07:11:55 BoogieIcfgContainer [2021-10-21 19:11:55,730 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-10-21 19:11:55,730 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:11:55,730 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:11:55,731 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:11:55,731 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:11:26" (3/4) ... [2021-10-21 19:11:55,735 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-21 19:11:55,735 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:11:55,737 INFO L168 Benchmark]: Toolchain (without parser) took 29704.30 ms. Allocated memory was 90.2 MB in the beginning and 232.8 MB in the end (delta: 142.6 MB). Free memory was 53.9 MB in the beginning and 144.1 MB in the end (delta: -90.2 MB). Peak memory consumption was 51.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:11:55,737 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 90.2 MB. Free memory is still 69.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:11:55,738 INFO L168 Benchmark]: CACSL2BoogieTranslator took 233.22 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 53.7 MB in the beginning and 85.7 MB in the end (delta: -32.0 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. [2021-10-21 19:11:55,738 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.46 ms. Allocated memory is still 109.1 MB. Free memory was 85.7 MB in the beginning and 84.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:11:55,739 INFO L168 Benchmark]: Boogie Preprocessor took 19.12 ms. Allocated memory is still 109.1 MB. Free memory was 84.2 MB in the beginning and 83.3 MB in the end (delta: 962.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:11:55,739 INFO L168 Benchmark]: RCFGBuilder took 270.88 ms. Allocated memory is still 109.1 MB. Free memory was 83.3 MB in the beginning and 74.2 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:11:55,740 INFO L168 Benchmark]: BuchiAutomizer took 29126.28 ms. Allocated memory was 109.1 MB in the beginning and 232.8 MB in the end (delta: 123.7 MB). Free memory was 74.2 MB in the beginning and 145.1 MB in the end (delta: -70.9 MB). Peak memory consumption was 55.9 MB. Max. memory is 16.1 GB. [2021-10-21 19:11:55,740 INFO L168 Benchmark]: Witness Printer took 4.64 ms. Allocated memory is still 232.8 MB. Free memory was 145.1 MB in the beginning and 144.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:11:55,742 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 90.2 MB. Free memory is still 69.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 233.22 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 53.7 MB in the beginning and 85.7 MB in the end (delta: -32.0 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 31.46 ms. Allocated memory is still 109.1 MB. Free memory was 85.7 MB in the beginning and 84.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.12 ms. Allocated memory is still 109.1 MB. Free memory was 84.2 MB in the beginning and 83.3 MB in the end (delta: 962.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 270.88 ms. Allocated memory is still 109.1 MB. Free memory was 83.3 MB in the beginning and 74.2 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 29126.28 ms. Allocated memory was 109.1 MB in the beginning and 232.8 MB in the end (delta: 123.7 MB). Free memory was 74.2 MB in the beginning and 145.1 MB in the end (delta: -70.9 MB). Peak memory consumption was 55.9 MB. Max. memory is 16.1 GB. * Witness Printer took 4.64 ms. Allocated memory is still 232.8 MB. Free memory was 145.1 MB in the beginning and 144.1 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 14 terminating modules (8 trivial, 2 deterministic, 4 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 9 locations. One nondeterministic module has affine ranking function n and consists of 10 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. 8 modules have a trivial ranking function, the largest among these consists of 24 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 29.0s and 10 iterations. TraceHistogramMax:15. Analysis of lassos took 16.1s. Construction of modules took 1.7s. Büchi inclusion checks took 10.3s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 13. Automata minimization 283.5ms AutomataMinimizationTime, 13 MinimizatonAttempts, 394 StatesRemovedByMinimization, 8 NontrivialMinimizations. Non-live state removal took 0.2s Buchi closure took 0.0s. Biggest automaton had 637 states and ocurred in iteration 8. Nontrivial modules had stage [2, 0, 4, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 8/26 HoareTripleCheckerStatistics: 314 SDtfs, 757 SDslu, 649 SDs, 0 SdLazy, 2494 SolverSat, 734 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1764.9ms Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI3 SILT5 lasso0 LassoPreprocessingBenchmarks: Lassos: inital17 mio100 ax100 hnf97 lsp95 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq181 hnf93 smp75 dnf100 smp100 tf109 neg96 sie109 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 43ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 11 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 6 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 7.7s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-10-21 19:11:55,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:56,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-10-21 19:11:56,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:56,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-10-21 19:11:56,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:56,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:57,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-10-21 19:11:57,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-10-21 19:11:57,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-10-21 19:11:57,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90059940-f947-4b52-a219-ac2fc9671b0c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...