./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_5-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_5-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg --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 02dc726982da9e300f34803a4bdbb3c0165037d3f4471bd0e009c42cfb19ed24 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 09:16:21,424 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:16:21,427 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:16:21,470 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:16:21,471 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:16:21,476 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:16:21,478 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:16:21,482 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:16:21,487 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:16:21,491 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:16:21,493 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:16:21,497 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:16:21,497 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:16:21,505 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:16:21,507 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:16:21,510 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:16:21,514 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:16:21,516 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:16:21,518 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:16:21,525 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:16:21,532 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:16:21,534 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:16:21,535 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:16:21,538 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:16:21,544 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:16:21,547 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:16:21,547 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:16:21,549 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:16:21,550 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:16:21,551 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:16:21,553 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:16:21,554 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:16:21,555 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:16:21,556 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:16:21,557 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:16:21,558 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:16:21,558 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:16:21,559 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:16:21,559 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:16:21,560 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:16:21,561 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:16:21,562 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-10-28 09:16:21,593 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:16:21,593 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:16:21,594 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:16:21,594 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:16:21,595 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:16:21,596 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:16:21,596 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:16:21,596 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-10-28 09:16:21,597 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-10-28 09:16:21,597 INFO L138 SettingsManager]: * Use old map elimination=false [2021-10-28 09:16:21,597 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-10-28 09:16:21,597 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-10-28 09:16:21,598 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-10-28 09:16:21,598 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:16:21,598 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 09:16:21,598 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 09:16:21,599 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 09:16:21,599 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 09:16:21,599 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:16:21,599 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-10-28 09:16:21,600 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-10-28 09:16:21,600 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-10-28 09:16:21,600 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 09:16:21,600 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 09:16:21,601 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-10-28 09:16:21,601 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:16:21,601 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-10-28 09:16:21,601 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:16:21,602 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:16:21,602 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:16:21,602 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 09:16:21,603 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:16:21,604 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-10-28 09:16:21,604 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_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02dc726982da9e300f34803a4bdbb3c0165037d3f4471bd0e009c42cfb19ed24 [2021-10-28 09:16:21,885 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:16:21,908 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:16:21,911 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:16:21,912 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:16:21,913 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:16:21,914 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/recursive-simple/fibo_5-2.c [2021-10-28 09:16:21,982 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/data/83389a6ff/0c358c2f319b478391c3d0db1b62727c/FLAG5b7cfba6c [2021-10-28 09:16:22,457 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:16:22,458 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/sv-benchmarks/c/recursive-simple/fibo_5-2.c [2021-10-28 09:16:22,465 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/data/83389a6ff/0c358c2f319b478391c3d0db1b62727c/FLAG5b7cfba6c [2021-10-28 09:16:22,840 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/data/83389a6ff/0c358c2f319b478391c3d0db1b62727c [2021-10-28 09:16:22,843 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:16:22,844 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 09:16:22,846 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:16:22,846 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:16:22,860 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:16:22,861 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:16:22" (1/1) ... [2021-10-28 09:16:22,863 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25a8b0a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:16:22, skipping insertion in model container [2021-10-28 09:16:22,863 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:16:22" (1/1) ... [2021-10-28 09:16:22,874 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:16:22,885 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:16:23,086 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_87a0fc01-bf99-451a-9c45-4fbdb189fab0/sv-benchmarks/c/recursive-simple/fibo_5-2.c[740,753] [2021-10-28 09:16:23,087 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:16:23,102 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 09:16:23,134 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_87a0fc01-bf99-451a-9c45-4fbdb189fab0/sv-benchmarks/c/recursive-simple/fibo_5-2.c[740,753] [2021-10-28 09:16:23,134 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:16:23,147 INFO L208 MainTranslator]: Completed translation [2021-10-28 09:16:23,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:16:23 WrapperNode [2021-10-28 09:16:23,148 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:16:23,149 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 09:16:23,149 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 09:16:23,149 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 09:16:23,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:16:23" (1/1) ... [2021-10-28 09:16:23,167 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:16:23" (1/1) ... [2021-10-28 09:16:23,188 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 09:16:23,189 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 09:16:23,189 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 09:16:23,189 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 09:16:23,207 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:16:23" (1/1) ... [2021-10-28 09:16:23,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:16:23" (1/1) ... [2021-10-28 09:16:23,209 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:16:23" (1/1) ... [2021-10-28 09:16:23,210 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:16:23" (1/1) ... [2021-10-28 09:16:23,217 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:16:23" (1/1) ... [2021-10-28 09:16:23,219 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:16:23" (1/1) ... [2021-10-28 09:16:23,227 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:16:23" (1/1) ... [2021-10-28 09:16:23,230 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 09:16:23,232 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 09:16:23,232 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 09:16:23,232 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 09:16:23,234 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:16:23" (1/1) ... [2021-10-28 09:16:23,243 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:23,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:23,280 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:23,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-10-28 09:16:23,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 09:16:23,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 09:16:23,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 09:16:23,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 09:16:23,346 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2021-10-28 09:16:23,346 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2021-10-28 09:16:23,578 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 09:16:23,579 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-28 09:16:23,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:16:23 BoogieIcfgContainer [2021-10-28 09:16:23,581 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 09:16:23,582 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-10-28 09:16:23,582 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-10-28 09:16:23,586 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-10-28 09:16:23,587 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 09:16:23,587 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.10 09:16:22" (1/3) ... [2021-10-28 09:16:23,589 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@13a5215b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.10 09:16:23, skipping insertion in model container [2021-10-28 09:16:23,589 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 09:16:23,589 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:16:23" (2/3) ... [2021-10-28 09:16:23,590 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@13a5215b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.10 09:16:23, skipping insertion in model container [2021-10-28 09:16:23,590 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 09:16:23,590 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:16:23" (3/3) ... [2021-10-28 09:16:23,592 INFO L389 chiAutomizerObserver]: Analyzing ICFG fibo_5-2.c [2021-10-28 09:16:23,664 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-10-28 09:16:23,670 INFO L360 BuchiCegarLoop]: Hoare is false [2021-10-28 09:16:23,671 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-10-28 09:16:23,671 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-28 09:16:23,671 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-28 09:16:23,671 INFO L364 BuchiCegarLoop]: Difference is false [2021-10-28 09:16:23,671 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-28 09:16:23,671 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-10-28 09:16:23,692 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) [2021-10-28 09:16:23,715 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-28 09:16:23,716 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:16:23,716 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:16:23,723 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-10-28 09:16:23,723 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-28 09:16:23,723 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-10-28 09:16:23,724 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) [2021-10-28 09:16:23,727 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-28 09:16:23,727 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:16:23,727 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:16:23,728 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-10-28 09:16:23,728 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-28 09:16:23,735 INFO L791 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 13#L-1true havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 6#L27true call main_#t~ret9 := fibo(main_~x~0);< 7#fiboENTRYtrue [2021-10-28 09:16:23,736 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 [2021-10-28 09:16:23,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:23,742 INFO L85 PathProgramCache]: Analyzing trace with hash 29883, now seen corresponding path program 1 times [2021-10-28 09:16:23,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:16:23,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775843810] [2021-10-28 09:16:23,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:23,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:16:23,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:16:23,857 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:16:23,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:16:23,901 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:16:23,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:23,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1450956, now seen corresponding path program 1 times [2021-10-28 09:16:23,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:16:23,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803342326] [2021-10-28 09:16:23,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:23,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:16:23,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:16:23,914 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:16:23,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:16:23,944 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:16:23,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:23,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1828301702, now seen corresponding path program 1 times [2021-10-28 09:16:23,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:16:23,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675711784] [2021-10-28 09:16:23,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:23,948 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:16:23,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:16:23,970 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:16:23,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:16:23,995 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:16:24,158 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:16:24,158 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:16:24,158 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:16:24,159 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:16:24,159 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 09:16:24,159 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:24,159 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:16:24,159 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:16:24,159 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration1_Loop [2021-10-28 09:16:24,160 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:16:24,160 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:16:24,177 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:24,183 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:24,186 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:24,189 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:24,196 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:24,298 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:16:24,299 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 09:16:24,302 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:24,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:24,305 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:24,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-10-28 09:16:24,308 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:16:24,311 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:16:24,340 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:16:24,341 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 09:16:24,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:24,374 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:24,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:24,384 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:24,390 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:16:24,390 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:16:24,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-10-28 09:16:24,402 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:16:24,403 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 09:16:24,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:24,435 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:24,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:24,437 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:24,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-10-28 09:16:24,443 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:16:24,444 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:16:24,475 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:16:24,476 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 09:16:24,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:24,510 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:24,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:24,516 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:24,523 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:16:24,523 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:16:24,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-10-28 09:16:24,536 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:16:24,537 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 09:16:24,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:24,563 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:24,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:24,564 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:24,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-10-28 09:16:24,567 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:16:24,567 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:16:24,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:24,603 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:24,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:24,604 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:24,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-10-28 09:16:24,610 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 09:16:24,610 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:16:24,719 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 09:16:24,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Ended with exit code 0 [2021-10-28 09:16:24,725 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:16:24,725 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:16:24,725 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:16:24,725 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:16:24,725 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 09:16:24,725 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:24,725 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:16:24,725 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:16:24,726 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration1_Loop [2021-10-28 09:16:24,726 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:16:24,726 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:16:24,727 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:24,730 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:24,733 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:24,736 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:24,738 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:24,786 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:16:24,791 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 09:16:24,792 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:24,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:24,795 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:24,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-10-28 09:16:24,801 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 [2021-10-28 09:16:24,809 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:16:24,809 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:16:24,810 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:16:24,810 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:16:24,810 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:16:24,811 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:16:24,812 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:16:24,818 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:16:24,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Ended with exit code 0 [2021-10-28 09:16:24,840 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:24,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:24,841 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:24,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-10-28 09:16:24,843 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 [2021-10-28 09:16:24,851 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:16:24,851 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:16:24,851 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:16:24,851 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:16:24,851 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:16:24,852 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:16:24,852 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:16:24,854 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:16:24,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:24,877 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:24,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:24,878 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:24,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-10-28 09:16:24,882 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 [2021-10-28 09:16:24,890 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:16:24,890 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:16:24,890 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:16:24,891 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:16:24,891 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:16:24,892 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:16:24,892 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:16:24,910 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:16:24,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:24,939 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:24,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:24,940 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:24,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-10-28 09:16:24,943 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 [2021-10-28 09:16:24,952 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:16:24,952 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:16:24,953 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:16:24,953 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:16:24,953 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:16:24,954 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:16:24,954 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:16:24,979 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:16:25,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:25,013 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:25,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:25,016 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:25,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-10-28 09:16:25,030 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 [2021-10-28 09:16:25,037 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:16:25,038 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:16:25,038 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:16:25,038 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:16:25,038 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:16:25,039 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:16:25,039 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:16:25,053 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 09:16:25,058 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-28 09:16:25,058 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-28 09:16:25,060 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:25,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:25,061 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:25,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-10-28 09:16:25,062 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 09:16:25,063 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 09:16:25,063 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 09:16:25,063 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2021-10-28 09:16:25,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:25,085 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 09:16:25,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:25,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:25,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 09:16:25,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:25,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:25,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:16:25,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:25,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:16:25,248 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 [2021-10-28 09:16:25,249 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) [2021-10-28 09:16:25,389 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. [2021-10-28 09:16:25,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-10-28 09:16:25,391 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) [2021-10-28 09:16:25,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2021-10-28 09:16:25,394 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2021-10-28 09:16:25,395 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:16:25,395 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2021-10-28 09:16:25,396 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:16:25,396 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2021-10-28 09:16:25,396 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:16:25,397 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 48 states and 60 transitions. [2021-10-28 09:16:25,419 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-28 09:16:25,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:25,425 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 48 states to 25 states and 34 transitions. [2021-10-28 09:16:25,426 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2021-10-28 09:16:25,426 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2021-10-28 09:16:25,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2021-10-28 09:16:25,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:16:25,427 INFO L681 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-10-28 09:16:25,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2021-10-28 09:16:25,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2021-10-28 09:16:25,459 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) [2021-10-28 09:16:25,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2021-10-28 09:16:25,463 INFO L704 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-10-28 09:16:25,463 INFO L587 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-10-28 09:16:25,463 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-10-28 09:16:25,463 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2021-10-28 09:16:25,466 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-28 09:16:25,466 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:16:25,466 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:16:25,467 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:16:25,467 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:16:25,468 INFO L791 eck$LassoCheckResult]: Stem: 122#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 123#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 128#L27 call main_#t~ret9 := fibo(main_~x~0);< 132#fiboENTRY ~n := #in~n; 133#L8 assume !(~n < 1); 138#L10 assume !(1 == ~n); 127#L13 call #t~ret7 := fibo(~n - 1);< 129#fiboENTRY ~n := #in~n; 134#L8 assume ~n < 1;#res := 0; 135#fiboFINAL assume true; 136#fiboEXIT >#33#return; 125#L13-1 [2021-10-28 09:16:25,468 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 [2021-10-28 09:16:25,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:25,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1181449843, now seen corresponding path program 1 times [2021-10-28 09:16:25,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:16:25,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74546085] [2021-10-28 09:16:25,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:25,470 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:16:25,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:25,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 09:16:25,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:25,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:16:25,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:16:25,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74546085] [2021-10-28 09:16:25,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74546085] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:16:25,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:16:25,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 09:16:25,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787730411] [2021-10-28 09:16:25,580 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:16:25,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:25,581 INFO L85 PathProgramCache]: Analyzing trace with hash 246097683, now seen corresponding path program 1 times [2021-10-28 09:16:25,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:16:25,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228654747] [2021-10-28 09:16:25,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:25,582 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:16:25,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:25,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-10-28 09:16:25,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:25,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:16:25,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:16:25,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228654747] [2021-10-28 09:16:25,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228654747] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:16:25,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:16:25,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 09:16:25,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048772189] [2021-10-28 09:16:25,650 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 09:16:25,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:16:25,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:16:25,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:16:25,655 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) [2021-10-28 09:16:25,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:16:25,769 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-10-28 09:16:25,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:16:25,771 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2021-10-28 09:16:25,779 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-28 09:16:25,786 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2021-10-28 09:16:25,786 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2021-10-28 09:16:25,786 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2021-10-28 09:16:25,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2021-10-28 09:16:25,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:16:25,787 INFO L681 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-10-28 09:16:25,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2021-10-28 09:16:25,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-28 09:16:25,790 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) [2021-10-28 09:16:25,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-10-28 09:16:25,792 INFO L704 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-10-28 09:16:25,792 INFO L587 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-10-28 09:16:25,792 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-10-28 09:16:25,792 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2021-10-28 09:16:25,793 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-28 09:16:25,793 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:16:25,794 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:16:25,794 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:16:25,795 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-10-28 09:16:25,796 INFO L791 eck$LassoCheckResult]: Stem: 195#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 196#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 201#L27 call main_#t~ret9 := fibo(main_~x~0);< 205#fiboENTRY ~n := #in~n; 207#L8 assume !(~n < 1); 211#L10 assume !(1 == ~n); 200#L13 call #t~ret7 := fibo(~n - 1);< 202#fiboENTRY ~n := #in~n; 208#L8 assume !(~n < 1); 210#L10 assume 1 == ~n;#res := 1; 212#fiboFINAL assume true; 214#fiboEXIT >#33#return; 198#L13-1 [2021-10-28 09:16:25,797 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 [2021-10-28 09:16:25,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:25,798 INFO L85 PathProgramCache]: Analyzing trace with hash 2029785426, now seen corresponding path program 1 times [2021-10-28 09:16:25,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:16:25,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396166318] [2021-10-28 09:16:25,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:25,800 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:16:25,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:25,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 09:16:25,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:25,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:16:25,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:16:25,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396166318] [2021-10-28 09:16:25,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396166318] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:16:25,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097419731] [2021-10-28 09:16:25,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:25,893 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:16:25,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:25,900 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:16:25,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 09:16:25,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:25,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 09:16:25,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:26,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:16:26,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097419731] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:16:26,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:16:26,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-28 09:16:26,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906766629] [2021-10-28 09:16:26,024 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:16:26,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:26,025 INFO L85 PathProgramCache]: Analyzing trace with hash -960881524, now seen corresponding path program 1 times [2021-10-28 09:16:26,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:16:26,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299724048] [2021-10-28 09:16:26,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:26,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:16:26,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:16:26,032 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:16:26,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:16:26,053 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:16:26,249 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:16:26,249 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:16:26,249 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:16:26,249 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:16:26,249 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 09:16:26,249 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:26,249 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:16:26,250 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:16:26,250 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration3_Loop [2021-10-28 09:16:26,250 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:16:26,250 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:16:26,251 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:26,255 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:26,265 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:26,269 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:26,325 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:16:26,325 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 09:16:26,325 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:26,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:26,331 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:26,338 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:16:26,338 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:16:26,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-10-28 09:16:26,364 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:16:26,364 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 09:16:26,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:26,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:26,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:26,408 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:26,432 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:16:26,432 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:16:26,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-10-28 09:16:26,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:26,480 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:26,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:26,481 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:26,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-10-28 09:16:26,482 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 09:16:26,483 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:16:27,656 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 09:16:27,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:27,659 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:16:27,659 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:16:27,659 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:16:27,659 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:16:27,659 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 09:16:27,659 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:27,660 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:16:27,660 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:16:27,660 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration3_Loop [2021-10-28 09:16:27,660 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:16:27,660 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:16:27,661 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:27,663 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:27,671 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:27,675 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:27,721 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:16:27,721 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 09:16:27,721 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:27,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:27,731 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:27,740 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 [2021-10-28 09:16:27,751 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:16:27,751 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:16:27,751 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:16:27,751 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:16:27,751 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:16:27,752 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:16:27,753 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:16:27,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-10-28 09:16:27,763 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:16:27,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:27,808 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:27,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:27,810 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:27,816 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 [2021-10-28 09:16:27,828 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:16:27,828 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:16:27,828 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:16:27,829 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:16:27,829 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:16:27,832 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:16:27,833 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:16:27,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-10-28 09:16:27,851 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 09:16:27,856 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-28 09:16:27,856 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-28 09:16:27,857 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:27,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:27,860 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:27,872 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 09:16:27,872 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 09:16:27,872 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 09:16:27,872 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2021-10-28 09:16:27,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-10-28 09:16:27,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:27,919 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 09:16:27,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:27,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:27,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 09:16:27,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:28,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:28,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 09:16:28,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:28,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:16:28,375 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 [2021-10-28 09:16:28,376 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) [2021-10-28 09:16:28,613 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. [2021-10-28 09:16:28,614 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 [2021-10-28 09:16:28,614 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) [2021-10-28 09:16:28,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2021-10-28 09:16:28,617 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 10 letters. [2021-10-28 09:16:28,617 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:16:28,624 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 22 letters. Loop has 10 letters. [2021-10-28 09:16:28,625 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:16:28,626 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 20 letters. [2021-10-28 09:16:28,628 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:16:28,629 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 183 transitions. [2021-10-28 09:16:28,646 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-10-28 09:16:28,653 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 108 states and 152 transitions. [2021-10-28 09:16:28,654 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 64 [2021-10-28 09:16:28,656 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2021-10-28 09:16:28,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 152 transitions. [2021-10-28 09:16:28,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:16:28,663 INFO L681 BuchiCegarLoop]: Abstraction has 108 states and 152 transitions. [2021-10-28 09:16:28,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states and 152 transitions. [2021-10-28 09:16:28,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2021-10-28 09:16:28,677 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) [2021-10-28 09:16:28,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2021-10-28 09:16:28,679 INFO L704 BuchiCegarLoop]: Abstraction has 94 states and 126 transitions. [2021-10-28 09:16:28,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:16:28,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:16:28,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:16:28,681 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) [2021-10-28 09:16:28,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:16:28,768 INFO L93 Difference]: Finished difference Result 109 states and 147 transitions. [2021-10-28 09:16:28,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:16:28,768 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 109 states and 147 transitions. [2021-10-28 09:16:28,782 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-10-28 09:16:28,792 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 109 states to 106 states and 144 transitions. [2021-10-28 09:16:28,793 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 69 [2021-10-28 09:16:28,794 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2021-10-28 09:16:28,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 144 transitions. [2021-10-28 09:16:28,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:16:28,795 INFO L681 BuchiCegarLoop]: Abstraction has 106 states and 144 transitions. [2021-10-28 09:16:28,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states and 144 transitions. [2021-10-28 09:16:28,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2021-10-28 09:16:28,813 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) [2021-10-28 09:16:28,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 125 transitions. [2021-10-28 09:16:28,820 INFO L704 BuchiCegarLoop]: Abstraction has 94 states and 125 transitions. [2021-10-28 09:16:28,821 INFO L587 BuchiCegarLoop]: Abstraction has 94 states and 125 transitions. [2021-10-28 09:16:28,821 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-10-28 09:16:28,821 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 94 states and 125 transitions. [2021-10-28 09:16:28,826 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-10-28 09:16:28,826 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:16:28,826 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:16:28,831 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:16:28,832 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2021-10-28 09:16:28,833 INFO L791 eck$LassoCheckResult]: Stem: 736#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 737#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 743#L27 call main_#t~ret9 := fibo(main_~x~0);< 754#fiboENTRY ~n := #in~n; 798#L8 assume !(~n < 1); 778#L10 assume !(1 == ~n); 742#L13 call #t~ret7 := fibo(~n - 1);< 744#fiboENTRY ~n := #in~n; 759#L8 assume !(~n < 1); 775#L10 assume !(1 == ~n); 758#L13 call #t~ret7 := fibo(~n - 1);< 744#fiboENTRY ~n := #in~n; 759#L8 assume !(~n < 1); 775#L10 assume !(1 == ~n); 758#L13 call #t~ret7 := fibo(~n - 1);< 744#fiboENTRY ~n := #in~n; 760#L8 assume !(~n < 1); 797#L10 assume 1 == ~n;#res := 1; 796#fiboFINAL assume true; 795#fiboEXIT >#33#return; 756#L13-1 call #t~ret8 := fibo(~n - 2);< 755#fiboENTRY ~n := #in~n; 757#L8 assume ~n < 1;#res := 0; 774#fiboFINAL assume true; 825#fiboEXIT >#35#return; 821#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 819#fiboFINAL assume true; 817#fiboEXIT >#33#return; 739#L13-1 [2021-10-28 09:16:28,833 INFO L793 eck$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 [2021-10-28 09:16:28,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:28,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1557778097, now seen corresponding path program 1 times [2021-10-28 09:16:28,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:16:28,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477421910] [2021-10-28 09:16:28,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:28,835 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:16:28,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:28,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Ended with exit code 0 [2021-10-28 09:16:28,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-28 09:16:28,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:29,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 09:16:29,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:29,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 09:16:29,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:29,066 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-28 09:16:29,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:16:29,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477421910] [2021-10-28 09:16:29,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477421910] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:16:29,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655548189] [2021-10-28 09:16:29,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:29,067 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:16:29,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:29,077 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:16:29,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-28 09:16:29,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:29,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 09:16:29,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:29,248 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-28 09:16:29,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655548189] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:16:29,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:16:29,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-10-28 09:16:29,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513103185] [2021-10-28 09:16:29,251 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:16:29,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:29,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1616897917, now seen corresponding path program 1 times [2021-10-28 09:16:29,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:16:29,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806279190] [2021-10-28 09:16:29,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:29,252 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:16:29,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:29,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-10-28 09:16:29,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:29,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 09:16:29,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:29,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 09:16:29,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:29,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 09:16:29,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:29,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 09:16:29,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:29,403 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 26 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-28 09:16:29,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:16:29,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806279190] [2021-10-28 09:16:29,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806279190] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:16:29,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359125154] [2021-10-28 09:16:29,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:29,404 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:16:29,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:29,408 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:16:29,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-28 09:16:29,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:29,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 09:16:29,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:29,581 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-28 09:16:29,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359125154] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:16:29,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:16:29,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-10-28 09:16:29,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793164867] [2021-10-28 09:16:29,582 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 09:16:29,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:16:29,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 09:16:29,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-28 09:16:29,584 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) [2021-10-28 09:16:29,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:16:29,777 INFO L93 Difference]: Finished difference Result 116 states and 159 transitions. [2021-10-28 09:16:29,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 09:16:29,778 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 116 states and 159 transitions. [2021-10-28 09:16:29,781 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2021-10-28 09:16:29,786 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 116 states to 114 states and 157 transitions. [2021-10-28 09:16:29,786 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2021-10-28 09:16:29,787 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2021-10-28 09:16:29,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 114 states and 157 transitions. [2021-10-28 09:16:29,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:16:29,787 INFO L681 BuchiCegarLoop]: Abstraction has 114 states and 157 transitions. [2021-10-28 09:16:29,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states and 157 transitions. [2021-10-28 09:16:29,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-10-28 09:16:29,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 76 states have internal predecessors, (85), 26 states have call successors, (27), 13 states have call predecessors, (27), 18 states have return successors, (45), 24 states have call predecessors, (45), 24 states have call successors, (45) [2021-10-28 09:16:29,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 157 transitions. [2021-10-28 09:16:29,802 INFO L704 BuchiCegarLoop]: Abstraction has 114 states and 157 transitions. [2021-10-28 09:16:29,802 INFO L587 BuchiCegarLoop]: Abstraction has 114 states and 157 transitions. [2021-10-28 09:16:29,802 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-10-28 09:16:29,802 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 114 states and 157 transitions. [2021-10-28 09:16:29,804 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2021-10-28 09:16:29,804 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:16:29,805 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:16:29,807 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:16:29,807 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [8, 7, 6, 4, 4, 4, 4, 3, 3, 2, 2] [2021-10-28 09:16:29,807 INFO L791 eck$LassoCheckResult]: Stem: 1247#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 1248#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 1265#L27 call main_#t~ret9 := fibo(main_~x~0);< 1266#fiboENTRY ~n := #in~n; 1312#L8 assume !(~n < 1); 1311#L10 assume !(1 == ~n); 1254#L13 call #t~ret7 := fibo(~n - 1);< 1273#fiboENTRY ~n := #in~n; 1274#L8 assume !(~n < 1); 1284#L10 assume !(1 == ~n); 1253#L13 call #t~ret7 := fibo(~n - 1);< 1255#fiboENTRY ~n := #in~n; 1309#L8 assume !(~n < 1); 1307#L10 assume !(1 == ~n); 1257#L13 call #t~ret7 := fibo(~n - 1);< 1255#fiboENTRY ~n := #in~n; 1309#L8 assume !(~n < 1); 1307#L10 assume !(1 == ~n); 1257#L13 call #t~ret7 := fibo(~n - 1);< 1255#fiboENTRY ~n := #in~n; 1310#L8 assume !(~n < 1); 1308#L10 assume 1 == ~n;#res := 1; 1306#fiboFINAL assume true; 1305#fiboEXIT >#33#return; 1280#L13-1 call #t~ret8 := fibo(~n - 2);< 1304#fiboENTRY ~n := #in~n; 1282#L8 assume ~n < 1;#res := 0; 1283#fiboFINAL assume true; 1279#fiboEXIT >#35#return; 1256#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1258#fiboFINAL assume true; 1275#fiboEXIT >#33#return; 1269#L13-1 [2021-10-28 09:16:29,808 INFO L793 eck$LassoCheckResult]: Loop: 1269#L13-1 call #t~ret8 := fibo(~n - 2);< 1267#fiboENTRY ~n := #in~n; 1272#L8 assume !(~n < 1); 1346#L10 assume !(1 == ~n); 1268#L13 call #t~ret7 := fibo(~n - 1);< 1267#fiboENTRY ~n := #in~n; 1272#L8 assume !(~n < 1); 1346#L10 assume !(1 == ~n); 1268#L13 call #t~ret7 := fibo(~n - 1);< 1267#fiboENTRY ~n := #in~n; 1272#L8 assume !(~n < 1); 1346#L10 assume !(1 == ~n); 1268#L13 call #t~ret7 := fibo(~n - 1);< 1267#fiboENTRY ~n := #in~n; 1272#L8 assume !(~n < 1); 1346#L10 assume 1 == ~n;#res := 1; 1286#fiboFINAL assume true; 1337#fiboEXIT >#33#return; 1251#L13-1 call #t~ret8 := fibo(~n - 2);< 1252#fiboENTRY ~n := #in~n; 1313#L8 assume ~n < 1;#res := 0; 1314#fiboFINAL assume true; 1349#fiboEXIT >#35#return; 1340#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1347#fiboFINAL assume true; 1343#fiboEXIT >#33#return; 1269#L13-1 call #t~ret8 := fibo(~n - 2);< 1267#fiboENTRY ~n := #in~n; 1272#L8 assume !(~n < 1); 1346#L10 assume !(1 == ~n); 1268#L13 call #t~ret7 := fibo(~n - 1);< 1267#fiboENTRY ~n := #in~n; 1272#L8 assume !(~n < 1); 1346#L10 assume 1 == ~n;#res := 1; 1286#fiboFINAL assume true; 1337#fiboEXIT >#33#return; 1251#L13-1 call #t~ret8 := fibo(~n - 2);< 1252#fiboENTRY ~n := #in~n; 1313#L8 assume ~n < 1;#res := 0; 1314#fiboFINAL assume true; 1349#fiboEXIT >#35#return; 1340#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1347#fiboFINAL assume true; 1343#fiboEXIT >#35#return; 1338#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1345#fiboFINAL assume true; 1341#fiboEXIT >#33#return; 1269#L13-1 [2021-10-28 09:16:29,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:29,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1730264506, now seen corresponding path program 2 times [2021-10-28 09:16:29,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:16:29,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764196978] [2021-10-28 09:16:29,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:29,809 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:16:29,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:16:29,822 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:16:29,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:16:29,841 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:16:29,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:29,842 INFO L85 PathProgramCache]: Analyzing trace with hash 564146419, now seen corresponding path program 2 times [2021-10-28 09:16:29,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:16:29,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338681784] [2021-10-28 09:16:29,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:29,843 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:16:29,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:29,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-10-28 09:16:29,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:29,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 09:16:29,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:29,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 09:16:29,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:29,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 09:16:29,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:29,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-10-28 09:16:29,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:29,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 09:16:29,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:30,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 09:16:30,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:30,006 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 45 proven. 31 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-10-28 09:16:30,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:16:30,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338681784] [2021-10-28 09:16:30,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338681784] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:16:30,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324788693] [2021-10-28 09:16:30,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:16:30,008 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:16:30,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:30,026 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:16:30,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-28 09:16:30,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:16:30,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:16:30,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 09:16:30,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:30,274 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 38 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-10-28 09:16:30,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324788693] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:16:30,274 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:16:30,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-10-28 09:16:30,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088483951] [2021-10-28 09:16:30,275 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 09:16:30,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:16:30,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 09:16:30,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-10-28 09:16:30,277 INFO L87 Difference]: Start difference. First operand 114 states and 157 transitions. cyclomatic complexity: 49 Second operand has 13 states, 10 states have (on average 2.9) internal successors, (29), 11 states have internal predecessors, (29), 9 states have call successors, (11), 1 states have call predecessors, (11), 6 states have return successors, (11), 6 states have call predecessors, (11), 9 states have call successors, (11) [2021-10-28 09:16:30,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:16:30,414 INFO L93 Difference]: Finished difference Result 65 states and 84 transitions. [2021-10-28 09:16:30,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 09:16:30,415 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 65 states and 84 transitions. [2021-10-28 09:16:30,417 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-10-28 09:16:30,418 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 65 states to 59 states and 77 transitions. [2021-10-28 09:16:30,419 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 48 [2021-10-28 09:16:30,419 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 48 [2021-10-28 09:16:30,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 77 transitions. [2021-10-28 09:16:30,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:16:30,420 INFO L681 BuchiCegarLoop]: Abstraction has 59 states and 77 transitions. [2021-10-28 09:16:30,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states and 77 transitions. [2021-10-28 09:16:30,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2021-10-28 09:16:30,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 11 states have call successors, (11), 8 states have call predecessors, (11), 8 states have return successors, (18), 10 states have call predecessors, (18), 9 states have call successors, (18) [2021-10-28 09:16:30,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2021-10-28 09:16:30,426 INFO L704 BuchiCegarLoop]: Abstraction has 56 states and 70 transitions. [2021-10-28 09:16:30,426 INFO L587 BuchiCegarLoop]: Abstraction has 56 states and 70 transitions. [2021-10-28 09:16:30,426 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-10-28 09:16:30,426 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 56 states and 70 transitions. [2021-10-28 09:16:30,427 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-10-28 09:16:30,427 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:16:30,427 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:16:30,429 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [8, 6, 5, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-10-28 09:16:30,429 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1] [2021-10-28 09:16:30,430 INFO L791 eck$LassoCheckResult]: Stem: 1684#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 1685#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 1697#L27 call main_#t~ret9 := fibo(main_~x~0);< 1698#fiboENTRY ~n := #in~n; 1725#L8 assume !(~n < 1); 1723#L10 assume !(1 == ~n); 1692#L13 call #t~ret7 := fibo(~n - 1);< 1702#fiboENTRY ~n := #in~n; 1703#L8 assume !(~n < 1); 1709#L10 assume !(1 == ~n); 1691#L13 call #t~ret7 := fibo(~n - 1);< 1693#fiboENTRY ~n := #in~n; 1719#L8 assume !(~n < 1); 1724#L10 assume !(1 == ~n); 1695#L13 call #t~ret7 := fibo(~n - 1);< 1693#fiboENTRY ~n := #in~n; 1719#L8 assume !(~n < 1); 1724#L10 assume !(1 == ~n); 1695#L13 call #t~ret7 := fibo(~n - 1);< 1693#fiboENTRY ~n := #in~n; 1719#L8 assume !(~n < 1); 1724#L10 assume !(1 == ~n); 1695#L13 call #t~ret7 := fibo(~n - 1);< 1693#fiboENTRY ~n := #in~n; 1715#L8 assume !(~n < 1); 1716#L10 assume 1 == ~n;#res := 1; 1735#fiboFINAL assume true; 1734#fiboEXIT >#33#return; 1700#L13-1 call #t~ret8 := fibo(~n - 2);< 1699#fiboENTRY ~n := #in~n; 1701#L8 assume ~n < 1;#res := 0; 1708#fiboFINAL assume true; 1733#fiboEXIT >#35#return; 1731#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1728#fiboFINAL assume true; 1722#fiboEXIT >#33#return; 1706#L13-1 call #t~ret8 := fibo(~n - 2);< 1717#fiboENTRY ~n := #in~n; 1718#L8 assume ~n < 1;#res := 0; 1732#fiboFINAL assume true; 1729#fiboEXIT >#35#return; 1694#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1696#fiboFINAL assume true; 1704#fiboEXIT >#33#return; 1688#L13-1 [2021-10-28 09:16:30,430 INFO L793 eck$LassoCheckResult]: Loop: 1688#L13-1 call #t~ret8 := fibo(~n - 2);< 1712#fiboENTRY ~n := #in~n; 1736#L8 assume !(~n < 1); 1713#L10 assume !(1 == ~n); 1686#L13 call #t~ret7 := fibo(~n - 1);< 1690#fiboENTRY ~n := #in~n; 1714#L8 assume !(~n < 1); 1713#L10 assume !(1 == ~n); 1686#L13 call #t~ret7 := fibo(~n - 1);< 1690#fiboENTRY ~n := #in~n; 1714#L8 assume !(~n < 1); 1713#L10 assume !(1 == ~n); 1686#L13 call #t~ret7 := fibo(~n - 1);< 1690#fiboENTRY ~n := #in~n; 1714#L8 assume !(~n < 1); 1713#L10 assume 1 == ~n;#res := 1; 1711#fiboFINAL assume true; 1705#fiboEXIT >#33#return; 1707#L13-1 call #t~ret8 := fibo(~n - 2);< 1730#fiboENTRY ~n := #in~n; 1737#L8 assume ~n < 1;#res := 0; 1732#fiboFINAL assume true; 1729#fiboEXIT >#35#return; 1727#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1726#fiboFINAL assume true; 1720#fiboEXIT >#33#return; 1706#L13-1 call #t~ret8 := fibo(~n - 2);< 1717#fiboENTRY ~n := #in~n; 1718#L8 assume ~n < 1;#res := 0; 1732#fiboFINAL assume true; 1729#fiboEXIT >#35#return; 1694#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1696#fiboFINAL assume true; 1704#fiboEXIT >#33#return; 1688#L13-1 [2021-10-28 09:16:30,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:30,430 INFO L85 PathProgramCache]: Analyzing trace with hash -2124338928, now seen corresponding path program 3 times [2021-10-28 09:16:30,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:16:30,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439380026] [2021-10-28 09:16:30,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:30,431 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:16:30,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:30,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 09:16:30,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:30,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 09:16:30,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:30,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 09:16:30,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:30,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 09:16:30,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:30,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-10-28 09:16:30,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:30,647 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 35 proven. 51 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-28 09:16:30,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:16:30,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439380026] [2021-10-28 09:16:30,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439380026] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:16:30,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49531365] [2021-10-28 09:16:30,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:16:30,652 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:16:30,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:30,656 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:16:30,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-28 09:16:30,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-28 09:16:30,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:16:30,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 09:16:30,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:30,963 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-10-28 09:16:30,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49531365] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:16:30,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:16:30,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 18 [2021-10-28 09:16:30,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720896216] [2021-10-28 09:16:30,965 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:16:30,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:30,966 INFO L85 PathProgramCache]: Analyzing trace with hash -176759904, now seen corresponding path program 3 times [2021-10-28 09:16:30,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:16:30,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430890319] [2021-10-28 09:16:30,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:30,966 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:16:30,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:30,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-10-28 09:16:30,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:30,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 09:16:30,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:31,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 09:16:31,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:31,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 09:16:31,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:31,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-10-28 09:16:31,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:31,050 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-28 09:16:31,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:16:31,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430890319] [2021-10-28 09:16:31,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430890319] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:16:31,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720986000] [2021-10-28 09:16:31,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:16:31,051 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:16:31,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:31,055 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:16:31,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-28 09:16:31,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-28 09:16:31,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:16:31,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 09:16:31,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:31,280 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-28 09:16:31,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720986000] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:16:31,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:16:31,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-10-28 09:16:31,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411722286] [2021-10-28 09:16:31,282 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 09:16:31,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:16:31,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 09:16:31,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:16:31,283 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. cyclomatic complexity: 16 Second operand has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2021-10-28 09:16:31,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:16:31,375 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2021-10-28 09:16:31,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 09:16:31,376 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 56 states and 66 transitions. [2021-10-28 09:16:31,377 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-10-28 09:16:31,379 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 56 states to 56 states and 66 transitions. [2021-10-28 09:16:31,379 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 45 [2021-10-28 09:16:31,379 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 45 [2021-10-28 09:16:31,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 66 transitions. [2021-10-28 09:16:31,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:16:31,380 INFO L681 BuchiCegarLoop]: Abstraction has 56 states and 66 transitions. [2021-10-28 09:16:31,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states and 66 transitions. [2021-10-28 09:16:31,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2021-10-28 09:16:31,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (16), 10 states have call predecessors, (16), 9 states have call successors, (16) [2021-10-28 09:16:31,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-10-28 09:16:31,390 INFO L704 BuchiCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-10-28 09:16:31,391 INFO L587 BuchiCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-10-28 09:16:31,391 INFO L425 BuchiCegarLoop]: ======== Iteration 7============ [2021-10-28 09:16:31,391 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 54 states and 64 transitions. [2021-10-28 09:16:31,392 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-28 09:16:31,392 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:16:31,392 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:16:31,399 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [8, 7, 5, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-10-28 09:16:31,400 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2021-10-28 09:16:31,400 INFO L791 eck$LassoCheckResult]: Stem: 2177#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 2178#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 2190#L27 call main_#t~ret9 := fibo(main_~x~0);< 2191#fiboENTRY ~n := #in~n; 2214#L8 assume !(~n < 1); 2212#L10 assume !(1 == ~n); 2185#L13 call #t~ret7 := fibo(~n - 1);< 2195#fiboENTRY ~n := #in~n; 2196#L8 assume !(~n < 1); 2200#L10 assume !(1 == ~n); 2184#L13 call #t~ret7 := fibo(~n - 1);< 2186#fiboENTRY ~n := #in~n; 2209#L8 assume !(~n < 1); 2213#L10 assume !(1 == ~n); 2188#L13 call #t~ret7 := fibo(~n - 1);< 2186#fiboENTRY ~n := #in~n; 2209#L8 assume !(~n < 1); 2213#L10 assume !(1 == ~n); 2188#L13 call #t~ret7 := fibo(~n - 1);< 2186#fiboENTRY ~n := #in~n; 2209#L8 assume !(~n < 1); 2213#L10 assume !(1 == ~n); 2188#L13 call #t~ret7 := fibo(~n - 1);< 2186#fiboENTRY ~n := #in~n; 2208#L8 assume !(~n < 1); 2227#L10 assume 1 == ~n;#res := 1; 2226#fiboFINAL assume true; 2225#fiboEXIT >#33#return; 2193#L13-1 call #t~ret8 := fibo(~n - 2);< 2192#fiboENTRY ~n := #in~n; 2194#L8 assume ~n < 1;#res := 0; 2199#fiboFINAL assume true; 2223#fiboEXIT >#35#return; 2221#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 2217#fiboFINAL assume true; 2211#fiboEXIT >#33#return; 2202#L13-1 call #t~ret8 := fibo(~n - 2);< 2207#fiboENTRY ~n := #in~n; 2206#L8 assume !(~n < 1); 2201#L10 assume 1 == ~n;#res := 1; 2203#fiboFINAL assume true; 2230#fiboEXIT >#35#return; 2187#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 2189#fiboFINAL assume true; 2197#fiboEXIT >#33#return; 2181#L13-1 [2021-10-28 09:16:31,400 INFO L793 eck$LassoCheckResult]: Loop: 2181#L13-1 call #t~ret8 := fibo(~n - 2);< 2183#fiboENTRY ~n := #in~n; 2205#L8 assume !(~n < 1); 2204#L10 assume !(1 == ~n); 2179#L13 call #t~ret7 := fibo(~n - 1);< 2183#fiboENTRY ~n := #in~n; 2205#L8 assume !(~n < 1); 2204#L10 assume !(1 == ~n); 2179#L13 call #t~ret7 := fibo(~n - 1);< 2183#fiboENTRY ~n := #in~n; 2205#L8 assume !(~n < 1); 2204#L10 assume !(1 == ~n); 2179#L13 call #t~ret7 := fibo(~n - 1);< 2183#fiboENTRY ~n := #in~n; 2205#L8 assume !(~n < 1); 2204#L10 assume 1 == ~n;#res := 1; 2203#fiboFINAL assume true; 2230#fiboEXIT >#33#return; 2219#L13-1 call #t~ret8 := fibo(~n - 2);< 2220#fiboENTRY ~n := #in~n; 2224#L8 assume ~n < 1;#res := 0; 2222#fiboFINAL assume true; 2218#fiboEXIT >#35#return; 2216#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 2215#fiboFINAL assume true; 2210#fiboEXIT >#33#return; 2202#L13-1 call #t~ret8 := fibo(~n - 2);< 2207#fiboENTRY ~n := #in~n; 2206#L8 assume !(~n < 1); 2201#L10 assume 1 == ~n;#res := 1; 2203#fiboFINAL assume true; 2230#fiboEXIT >#35#return; 2187#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 2189#fiboFINAL assume true; 2197#fiboEXIT >#33#return; 2181#L13-1 [2021-10-28 09:16:31,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:31,401 INFO L85 PathProgramCache]: Analyzing trace with hash -690973043, now seen corresponding path program 4 times [2021-10-28 09:16:31,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:16:31,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562905390] [2021-10-28 09:16:31,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:31,404 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:16:31,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:31,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 09:16:31,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:31,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 09:16:31,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:31,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 09:16:31,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:31,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 09:16:31,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:31,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-10-28 09:16:31,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:31,590 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 28 proven. 60 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-28 09:16:31,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:16:31,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562905390] [2021-10-28 09:16:31,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562905390] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:16:31,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982740579] [2021-10-28 09:16:31,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:16:31,591 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:16:31,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:31,596 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:16:31,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-28 09:16:31,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:16:31,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:16:31,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-28 09:16:31,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:31,923 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 26 proven. 65 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-28 09:16:31,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982740579] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:16:31,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:16:31,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 16 [2021-10-28 09:16:31,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604865349] [2021-10-28 09:16:31,924 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:16:31,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:31,925 INFO L85 PathProgramCache]: Analyzing trace with hash -445565443, now seen corresponding path program 4 times [2021-10-28 09:16:31,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:16:31,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480631676] [2021-10-28 09:16:31,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:31,926 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:16:31,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:16:31,934 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:16:31,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:16:31,941 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:16:32,436 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:16:32,436 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:16:32,436 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:16:32,436 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:16:32,436 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 09:16:32,436 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:32,436 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:16:32,436 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:16:32,436 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration7_Loop [2021-10-28 09:16:32,436 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:16:32,436 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:16:32,437 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:32,448 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:32,451 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:32,453 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:32,512 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:16:32,512 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 09:16:32,512 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:32,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:32,513 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:32,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-10-28 09:16:32,514 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:16:32,514 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:16:32,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:32,552 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:32,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:32,553 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:32,556 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 09:16:32,556 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:16:32,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-10-28 09:16:33,235 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 09:16:33,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:33,240 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:16:33,240 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:16:33,240 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:16:33,240 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:16:33,240 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 09:16:33,240 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:33,240 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:16:33,240 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:16:33,240 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration7_Loop [2021-10-28 09:16:33,240 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:16:33,241 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:16:33,241 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:33,258 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:33,260 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:33,263 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:33,321 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:16:33,321 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 09:16:33,321 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:33,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:33,324 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:33,327 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 [2021-10-28 09:16:33,337 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:16:33,337 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:16:33,338 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:16:33,338 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:16:33,338 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:16:33,342 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:16:33,342 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:16:33,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2021-10-28 09:16:33,363 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 09:16:33,367 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-10-28 09:16:33,367 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-10-28 09:16:33,367 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:33,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:33,372 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:33,374 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 09:16:33,374 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 09:16:33,374 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 09:16:33,374 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2021-10-28 09:16:33,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2021-10-28 09:16:33,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:33,412 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 09:16:33,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:33,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:33,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-28 09:16:33,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:33,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:34,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:34,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-28 09:16:34,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:34,512 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 14 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-28 09:16:34,514 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 8 loop predicates [2021-10-28 09:16:34,514 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 54 states and 64 transitions. cyclomatic complexity: 12 Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 7 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-28 09:16:34,618 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 54 states and 64 transitions. cyclomatic complexity: 12. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 7 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) Result 61 states and 71 transitions. Complement of second has 11 states. [2021-10-28 09:16:34,618 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 [2021-10-28 09:16:34,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 7 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-28 09:16:34,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 17 transitions. [2021-10-28 09:16:34,619 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 45 letters. Loop has 35 letters. [2021-10-28 09:16:34,621 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:16:34,622 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-28 09:16:34,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:34,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:34,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-28 09:16:34,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:35,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:35,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-28 09:16:35,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:35,691 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 14 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-28 09:16:35,692 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 8 loop predicates [2021-10-28 09:16:35,692 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 54 states and 64 transitions. cyclomatic complexity: 12 Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 7 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-28 09:16:35,784 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 54 states and 64 transitions. cyclomatic complexity: 12. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 7 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) Result 61 states and 71 transitions. Complement of second has 11 states. [2021-10-28 09:16:35,786 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 [2021-10-28 09:16:35,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 7 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-28 09:16:35,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 17 transitions. [2021-10-28 09:16:35,787 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 45 letters. Loop has 35 letters. [2021-10-28 09:16:35,788 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:16:35,788 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-28 09:16:35,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:35,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:35,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-28 09:16:35,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:36,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:36,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-28 09:16:36,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:36,784 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 14 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-28 09:16:36,785 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 8 loop predicates [2021-10-28 09:16:36,785 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 54 states and 64 transitions. cyclomatic complexity: 12 Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 7 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-28 09:16:37,105 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 54 states and 64 transitions. cyclomatic complexity: 12. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 7 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) Result 353 states and 439 transitions. Complement of second has 142 states. [2021-10-28 09:16:37,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2021-10-28 09:16:37,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 7 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-28 09:16:37,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 52 transitions. [2021-10-28 09:16:37,107 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 45 letters. Loop has 35 letters. [2021-10-28 09:16:37,109 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:16:37,110 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 80 letters. Loop has 35 letters. [2021-10-28 09:16:37,111 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:16:37,112 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 45 letters. Loop has 70 letters. [2021-10-28 09:16:37,114 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:16:37,114 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 353 states and 439 transitions. [2021-10-28 09:16:37,121 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-28 09:16:37,127 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 353 states to 221 states and 281 transitions. [2021-10-28 09:16:37,127 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 78 [2021-10-28 09:16:37,128 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 105 [2021-10-28 09:16:37,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 221 states and 281 transitions. [2021-10-28 09:16:37,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:16:37,129 INFO L681 BuchiCegarLoop]: Abstraction has 221 states and 281 transitions. [2021-10-28 09:16:37,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states and 281 transitions. [2021-10-28 09:16:37,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 213. [2021-10-28 09:16:37,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 134 states have (on average 1.1044776119402986) internal successors, (148), 140 states have internal predecessors, (148), 43 states have call successors, (43), 28 states have call predecessors, (43), 36 states have return successors, (68), 44 states have call predecessors, (68), 40 states have call successors, (68) [2021-10-28 09:16:37,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 259 transitions. [2021-10-28 09:16:37,146 INFO L704 BuchiCegarLoop]: Abstraction has 213 states and 259 transitions. [2021-10-28 09:16:37,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:16:37,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-28 09:16:37,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-10-28 09:16:37,147 INFO L87 Difference]: Start difference. First operand 213 states and 259 transitions. Second operand has 17 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 10 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2021-10-28 09:16:37,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:16:37,434 INFO L93 Difference]: Finished difference Result 124 states and 131 transitions. [2021-10-28 09:16:37,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 09:16:37,434 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 124 states and 131 transitions. [2021-10-28 09:16:37,436 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-10-28 09:16:37,437 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 124 states to 63 states and 66 transitions. [2021-10-28 09:16:37,438 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 49 [2021-10-28 09:16:37,438 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 52 [2021-10-28 09:16:37,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 66 transitions. [2021-10-28 09:16:37,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:16:37,438 INFO L681 BuchiCegarLoop]: Abstraction has 63 states and 66 transitions. [2021-10-28 09:16:37,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states and 66 transitions. [2021-10-28 09:16:37,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2021-10-28 09:16:37,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 43 states have internal predecessors, (45), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-10-28 09:16:37,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2021-10-28 09:16:37,442 INFO L704 BuchiCegarLoop]: Abstraction has 62 states and 65 transitions. [2021-10-28 09:16:37,442 INFO L587 BuchiCegarLoop]: Abstraction has 62 states and 65 transitions. [2021-10-28 09:16:37,442 INFO L425 BuchiCegarLoop]: ======== Iteration 8============ [2021-10-28 09:16:37,442 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 62 states and 65 transitions. [2021-10-28 09:16:37,443 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-10-28 09:16:37,443 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:16:37,443 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:16:37,444 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [9, 8, 6, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2021-10-28 09:16:37,445 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-28 09:16:37,445 INFO L791 eck$LassoCheckResult]: Stem: 4227#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 4228#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 4239#L27 call main_#t~ret9 := fibo(main_~x~0);< 4240#fiboENTRY ~n := #in~n; 4255#L8 assume !(~n < 1); 4261#L10 assume !(1 == ~n); 4233#L13 call #t~ret7 := fibo(~n - 1);< 4242#fiboENTRY ~n := #in~n; 4243#L8 assume !(~n < 1); 4251#L10 assume !(1 == ~n); 4232#L13 call #t~ret7 := fibo(~n - 1);< 4234#fiboENTRY ~n := #in~n; 4258#L8 assume !(~n < 1); 4263#L10 assume !(1 == ~n); 4257#L13 call #t~ret7 := fibo(~n - 1);< 4234#fiboENTRY ~n := #in~n; 4258#L8 assume !(~n < 1); 4263#L10 assume !(1 == ~n); 4257#L13 call #t~ret7 := fibo(~n - 1);< 4234#fiboENTRY ~n := #in~n; 4259#L8 assume !(~n < 1); 4272#L10 assume 1 == ~n;#res := 1; 4270#fiboFINAL assume true; 4269#fiboEXIT >#33#return; 4267#L13-1 call #t~ret8 := fibo(~n - 2);< 4268#fiboENTRY ~n := #in~n; 4273#L8 assume ~n < 1;#res := 0; 4271#fiboFINAL assume true; 4266#fiboEXIT >#35#return; 4265#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 4264#fiboFINAL assume true; 4262#fiboEXIT >#33#return; 4245#L13-1 call #t~ret8 := fibo(~n - 2);< 4260#fiboENTRY ~n := #in~n; 4256#L8 assume !(~n < 1); 4252#L10 assume 1 == ~n;#res := 1; 4244#fiboFINAL assume true; 4246#fiboEXIT >#35#return; 4286#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 4284#fiboFINAL assume true; 4282#fiboEXIT >#33#return; 4236#L13-1 call #t~ret8 := fibo(~n - 2);< 4253#fiboENTRY ~n := #in~n; 4281#L8 assume !(~n < 1); 4280#L10 assume !(1 == ~n); 4231#L13 call #t~ret7 := fibo(~n - 1);< 4276#fiboENTRY ~n := #in~n; 4279#L8 assume !(~n < 1); 4278#L10 assume !(1 == ~n); 4229#L13 [2021-10-28 09:16:37,445 INFO L793 eck$LassoCheckResult]: Loop: 4229#L13 call #t~ret7 := fibo(~n - 1);< 4230#fiboENTRY ~n := #in~n; 4241#L8 assume !(~n < 1); 4254#L10 assume !(1 == ~n); 4229#L13 [2021-10-28 09:16:37,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:37,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1327795734, now seen corresponding path program 5 times [2021-10-28 09:16:37,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:16:37,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735258433] [2021-10-28 09:16:37,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:37,446 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:16:37,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:37,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-28 09:16:37,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:37,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 09:16:37,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:37,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 09:16:37,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:37,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 09:16:37,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:37,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-10-28 09:16:37,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:37,574 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 53 proven. 32 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-28 09:16:37,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:16:37,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735258433] [2021-10-28 09:16:37,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735258433] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:16:37,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168933150] [2021-10-28 09:16:37,575 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:16:37,575 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:16:37,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:37,583 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:16:37,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-28 09:16:37,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-10-28 09:16:37,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:16:37,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 09:16:37,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:38,213 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 58 proven. 35 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-10-28 09:16:38,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168933150] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:16:38,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:16:38,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 14 [2021-10-28 09:16:38,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143690036] [2021-10-28 09:16:38,215 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:16:38,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:38,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1893846, now seen corresponding path program 2 times [2021-10-28 09:16:38,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:16:38,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226864152] [2021-10-28 09:16:38,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:38,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:16:38,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:16:38,226 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:16:38,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:16:38,229 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:16:38,285 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:16:38,285 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:16:38,285 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:16:38,285 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:16:38,285 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 09:16:38,286 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:38,286 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:16:38,286 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:16:38,286 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration8_Loop [2021-10-28 09:16:38,286 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:16:38,286 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:16:38,288 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:38,296 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:38,298 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:38,300 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:38,347 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:16:38,348 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 09:16:38,348 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:38,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:38,351 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:38,360 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:16:38,360 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:16:38,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2021-10-28 09:16:38,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:38,427 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:38,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:38,430 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:38,433 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 09:16:38,433 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:16:38,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2021-10-28 09:16:41,019 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 09:16:41,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Ended with exit code 0 [2021-10-28 09:16:41,022 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:16:41,022 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:16:41,022 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:16:41,022 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:16:41,022 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 09:16:41,022 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:41,022 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:16:41,022 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:16:41,022 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration8_Loop [2021-10-28 09:16:41,022 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:16:41,022 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:16:41,023 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:41,029 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:41,031 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:41,033 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:41,076 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:16:41,077 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 09:16:41,077 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:41,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:41,078 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:41,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2021-10-28 09:16:41,085 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 [2021-10-28 09:16:41,092 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:16:41,092 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:16:41,092 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:16:41,092 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:16:41,092 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:16:41,094 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:16:41,094 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:16:41,105 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 09:16:41,110 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-28 09:16:41,110 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-28 09:16:41,110 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:41,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:41,112 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:41,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2021-10-28 09:16:41,115 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 09:16:41,115 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 09:16:41,115 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 09:16:41,115 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2021-10-28 09:16:41,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Ended with exit code 0 [2021-10-28 09:16:41,135 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 09:16:41,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:41,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:41,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-28 09:16:41,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:41,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:41,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:41,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:16:41,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:41,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:16:41,939 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 [2021-10-28 09:16:41,940 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 62 states and 65 transitions. cyclomatic complexity: 5 Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 09:16:41,993 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 62 states and 65 transitions. cyclomatic complexity: 5. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 71 states and 75 transitions. Complement of second has 18 states. [2021-10-28 09:16:41,994 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 [2021-10-28 09:16:41,994 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) [2021-10-28 09:16:41,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2021-10-28 09:16:41,995 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 49 letters. Loop has 4 letters. [2021-10-28 09:16:41,995 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:16:41,995 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-28 09:16:42,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:42,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:42,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-28 09:16:42,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:42,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:42,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:16:42,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:42,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:16:42,655 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 [2021-10-28 09:16:42,655 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 62 states and 65 transitions. cyclomatic complexity: 5 Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 09:16:42,733 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 62 states and 65 transitions. cyclomatic complexity: 5. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 77 states and 81 transitions. Complement of second has 17 states. [2021-10-28 09:16:42,734 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 [2021-10-28 09:16:42,734 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) [2021-10-28 09:16:42,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2021-10-28 09:16:42,735 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 49 letters. Loop has 4 letters. [2021-10-28 09:16:42,735 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:16:42,735 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-28 09:16:42,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:42,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:42,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-28 09:16:42,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:43,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:43,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:16:43,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:43,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:16:43,367 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 [2021-10-28 09:16:43,367 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 62 states and 65 transitions. cyclomatic complexity: 5 Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 09:16:43,444 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 62 states and 65 transitions. cyclomatic complexity: 5. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 86 states and 93 transitions. Complement of second has 27 states. [2021-10-28 09:16:43,445 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 [2021-10-28 09:16:43,445 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) [2021-10-28 09:16:43,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2021-10-28 09:16:43,446 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 49 letters. Loop has 4 letters. [2021-10-28 09:16:43,449 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:16:43,449 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 53 letters. Loop has 4 letters. [2021-10-28 09:16:43,450 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:16:43,452 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 49 letters. Loop has 8 letters. [2021-10-28 09:16:43,453 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:16:43,454 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 86 states and 93 transitions. [2021-10-28 09:16:43,456 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-28 09:16:43,457 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 86 states to 0 states and 0 transitions. [2021-10-28 09:16:43,457 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-10-28 09:16:43,457 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-10-28 09:16:43,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-10-28 09:16:43,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:16:43,457 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 09:16:43,458 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 09:16:43,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:16:43,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 09:16:43,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-10-28 09:16:43,459 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand has 15 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 7 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-10-28 09:16:43,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:16:43,459 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2021-10-28 09:16:43,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-28 09:16:43,460 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2021-10-28 09:16:43,460 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-28 09:16:43,460 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 09:16:43,461 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-10-28 09:16:43,461 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-10-28 09:16:43,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-10-28 09:16:43,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:16:43,461 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 09:16:43,461 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 09:16:43,461 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 09:16:43,461 INFO L425 BuchiCegarLoop]: ======== Iteration 9============ [2021-10-28 09:16:43,462 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-10-28 09:16:43,462 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-28 09:16:43,462 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-10-28 09:16:43,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.10 09:16:43 BoogieIcfgContainer [2021-10-28 09:16:43,475 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-10-28 09:16:43,476 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 09:16:43,476 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 09:16:43,476 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 09:16:43,477 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:16:23" (3/4) ... [2021-10-28 09:16:43,481 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-28 09:16:43,481 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 09:16:43,483 INFO L168 Benchmark]: Toolchain (without parser) took 20637.24 ms. Allocated memory was 81.8 MB in the beginning and 195.0 MB in the end (delta: 113.2 MB). Free memory was 44.8 MB in the beginning and 139.4 MB in the end (delta: -94.5 MB). Peak memory consumption was 19.6 MB. Max. memory is 16.1 GB. [2021-10-28 09:16:43,483 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 81.8 MB. Free memory was 60.7 MB in the beginning and 60.7 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:16:43,484 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.20 ms. Allocated memory was 81.8 MB in the beginning and 100.7 MB in the end (delta: 18.9 MB). Free memory was 44.6 MB in the beginning and 77.9 MB in the end (delta: -33.3 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. [2021-10-28 09:16:43,485 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.78 ms. Allocated memory is still 100.7 MB. Free memory was 77.9 MB in the beginning and 76.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:16:43,485 INFO L168 Benchmark]: Boogie Preprocessor took 41.17 ms. Allocated memory is still 100.7 MB. Free memory was 76.6 MB in the beginning and 75.6 MB in the end (delta: 994.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:16:43,485 INFO L168 Benchmark]: RCFGBuilder took 349.58 ms. Allocated memory is still 100.7 MB. Free memory was 75.6 MB in the beginning and 66.6 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 09:16:43,486 INFO L168 Benchmark]: BuchiAutomizer took 19892.92 ms. Allocated memory was 100.7 MB in the beginning and 195.0 MB in the end (delta: 94.4 MB). Free memory was 66.4 MB in the beginning and 139.4 MB in the end (delta: -73.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 16.1 GB. [2021-10-28 09:16:43,486 INFO L168 Benchmark]: Witness Printer took 5.37 ms. Allocated memory is still 195.0 MB. Free memory is still 139.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:16:43,489 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 81.8 MB. Free memory was 60.7 MB in the beginning and 60.7 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 302.20 ms. Allocated memory was 81.8 MB in the beginning and 100.7 MB in the end (delta: 18.9 MB). Free memory was 44.6 MB in the beginning and 77.9 MB in the end (delta: -33.3 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.78 ms. Allocated memory is still 100.7 MB. Free memory was 77.9 MB in the beginning and 76.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 41.17 ms. Allocated memory is still 100.7 MB. Free memory was 76.6 MB in the beginning and 75.6 MB in the end (delta: 994.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 349.58 ms. Allocated memory is still 100.7 MB. Free memory was 75.6 MB in the beginning and 66.6 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 19892.92 ms. Allocated memory was 100.7 MB in the beginning and 195.0 MB in the end (delta: 94.4 MB). Free memory was 66.4 MB in the beginning and 139.4 MB in the end (delta: -73.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 16.1 GB. * Witness Printer took 5.37 ms. Allocated memory is still 195.0 MB. Free memory is still 139.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 11 terminating modules (7 trivial, 2 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 9 locations. One nondeterministic module has affine ranking function n and consists of 11 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. 7 modules have a trivial ranking function, the largest among these consists of 17 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 19.8s and 9 iterations. TraceHistogramMax:9. Analysis of lassos took 11.4s. Construction of modules took 0.7s. Büchi inclusion checks took 7.2s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 9. Automata minimization 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 45 StatesRemovedByMinimization, 7 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had 114 states and ocurred in iteration 4. Nontrivial modules had stage [2, 0, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 32/70 HoareTripleCheckerStatistics: 178 SDtfs, 374 SDslu, 262 SDs, 0 SdLazy, 857 SolverSat, 256 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time LassoAnalysisResults: nont0 unkn0 SFLI1 SFLT1 conc0 concLT0 SILN0 SILU0 SILI3 SILT3 lasso0 LassoPreprocessingBenchmarks: Lassos: inital18 mio100 ax100 hnf96 lsp92 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq182 hnf93 smp80 dnf100 smp100 tf109 neg96 sie108 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 26ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 5 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 4.9s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-10-28 09:16:43,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:43,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:43,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:44,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:44,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:44,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-10-28 09:16:44,741 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-10-28 09:16:44,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-10-28 09:16:45,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a0fc01-bf99-451a-9c45-4fbdb189fab0/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...