./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 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_5-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3 --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 063966206f80cef10873a8e49ae0985aad7f65cb .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 20:16:13,774 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 20:16:13,778 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 20:16:13,846 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 20:16:13,847 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 20:16:13,848 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 20:16:13,851 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 20:16:13,854 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 20:16:13,857 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 20:16:13,858 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 20:16:13,860 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 20:16:13,862 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 20:16:13,863 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 20:16:13,865 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 20:16:13,867 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 20:16:13,869 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 20:16:13,871 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 20:16:13,872 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 20:16:13,876 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 20:16:13,879 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 20:16:13,884 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 20:16:13,889 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 20:16:13,890 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 20:16:13,892 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 20:16:13,896 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 20:16:13,897 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 20:16:13,897 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 20:16:13,899 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 20:16:13,899 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 20:16:13,901 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 20:16:13,901 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 20:16:13,903 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 20:16:13,912 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 20:16:13,915 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 20:16:13,917 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 20:16:13,917 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 20:16:13,918 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 20:16:13,918 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 20:16:13,918 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 20:16:13,920 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 20:16:13,921 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 20:16:13,922 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-10-15 20:16:13,958 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 20:16:13,959 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 20:16:13,959 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 20:16:13,959 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 20:16:13,961 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 20:16:13,961 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 20:16:13,961 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 20:16:13,962 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-10-15 20:16:13,962 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-10-15 20:16:13,962 INFO L138 SettingsManager]: * Use old map elimination=false [2021-10-15 20:16:13,962 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-10-15 20:16:13,963 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-10-15 20:16:13,963 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-10-15 20:16:13,963 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 20:16:13,963 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 20:16:13,964 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-15 20:16:13,964 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 20:16:13,964 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 20:16:13,964 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 20:16:13,964 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-10-15 20:16:13,965 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-10-15 20:16:13,965 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-10-15 20:16:13,965 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 20:16:13,965 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 20:16:13,966 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-10-15 20:16:13,966 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 20:16:13,966 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-10-15 20:16:13,966 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 20:16:13,967 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 20:16:13,967 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 20:16:13,967 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 20:16:13,967 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 20:16:13,968 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-10-15 20:16:13,969 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_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 063966206f80cef10873a8e49ae0985aad7f65cb [2021-10-15 20:16:14,264 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 20:16:14,290 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 20:16:14,293 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 20:16:14,295 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 20:16:14,296 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 20:16:14,297 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/recursive-simple/fibo_5-2.c [2021-10-15 20:16:14,380 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/data/2cf4d43b0/40d822dc0a944c45b28063c9b7de09e6/FLAG738769aea [2021-10-15 20:16:14,912 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 20:16:14,913 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/sv-benchmarks/c/recursive-simple/fibo_5-2.c [2021-10-15 20:16:14,933 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/data/2cf4d43b0/40d822dc0a944c45b28063c9b7de09e6/FLAG738769aea [2021-10-15 20:16:15,270 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/data/2cf4d43b0/40d822dc0a944c45b28063c9b7de09e6 [2021-10-15 20:16:15,276 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 20:16:15,283 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 20:16:15,286 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 20:16:15,286 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 20:16:15,291 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 20:16:15,292 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:16:15" (1/1) ... [2021-10-15 20:16:15,296 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30e6a61e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:16:15, skipping insertion in model container [2021-10-15 20:16:15,296 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:16:15" (1/1) ... [2021-10-15 20:16:15,306 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 20:16:15,324 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 20:16:15,534 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_518efe89-15ea-4354-afbf-b48b324fb0c5/sv-benchmarks/c/recursive-simple/fibo_5-2.c[740,753] [2021-10-15 20:16:15,540 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:16:15,563 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 20:16:15,581 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_518efe89-15ea-4354-afbf-b48b324fb0c5/sv-benchmarks/c/recursive-simple/fibo_5-2.c[740,753] [2021-10-15 20:16:15,582 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:16:15,600 INFO L208 MainTranslator]: Completed translation [2021-10-15 20:16:15,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:16:15 WrapperNode [2021-10-15 20:16:15,602 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 20:16:15,603 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 20:16:15,603 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 20:16:15,604 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 20:16:15,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:16:15" (1/1) ... [2021-10-15 20:16:15,621 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:16:15" (1/1) ... [2021-10-15 20:16:15,638 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 20:16:15,639 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 20:16:15,640 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 20:16:15,640 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 20:16:15,650 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:16:15" (1/1) ... [2021-10-15 20:16:15,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:16:15" (1/1) ... [2021-10-15 20:16:15,652 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:16:15" (1/1) ... [2021-10-15 20:16:15,652 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:16:15" (1/1) ... [2021-10-15 20:16:15,656 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:16:15" (1/1) ... [2021-10-15 20:16:15,659 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:16:15" (1/1) ... [2021-10-15 20:16:15,660 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:16:15" (1/1) ... [2021-10-15 20:16:15,662 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 20:16:15,663 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 20:16:15,663 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 20:16:15,663 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 20:16:15,665 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:16:15" (1/1) ... [2021-10-15 20:16:15,674 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 20:16:15,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:16:15,709 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 20:16:15,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-10-15 20:16:15,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 20:16:15,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 20:16:15,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 20:16:15,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 20:16:15,765 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2021-10-15 20:16:15,765 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2021-10-15 20:16:15,974 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 20:16:15,975 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-15 20:16:15,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:16:15 BoogieIcfgContainer [2021-10-15 20:16:15,977 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 20:16:15,979 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-10-15 20:16:15,979 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-10-15 20:16:15,983 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-10-15 20:16:15,984 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-15 20:16:15,984 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 15.10 08:16:15" (1/3) ... [2021-10-15 20:16:15,985 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@23c1876f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 15.10 08:16:15, skipping insertion in model container [2021-10-15 20:16:15,986 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-15 20:16:15,986 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:16:15" (2/3) ... [2021-10-15 20:16:15,987 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@23c1876f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 15.10 08:16:15, skipping insertion in model container [2021-10-15 20:16:15,987 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-15 20:16:15,987 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:16:15" (3/3) ... [2021-10-15 20:16:15,989 INFO L389 chiAutomizerObserver]: Analyzing ICFG fibo_5-2.c [2021-10-15 20:16:16,042 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-10-15 20:16:16,043 INFO L360 BuchiCegarLoop]: Hoare is false [2021-10-15 20:16:16,043 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-10-15 20:16:16,043 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-15 20:16:16,044 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-15 20:16:16,044 INFO L364 BuchiCegarLoop]: Difference is false [2021-10-15 20:16:16,044 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-15 20:16:16,044 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-10-15 20:16:16,062 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) [2021-10-15 20:16:16,089 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-15 20:16:16,090 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-15 20:16:16,090 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-15 20:16:16,096 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-10-15 20:16:16,096 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-15 20:16:16,096 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-10-15 20:16:16,097 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) [2021-10-15 20:16:16,099 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-15 20:16:16,100 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-15 20:16:16,100 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-15 20:16:16,100 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-10-15 20:16:16,101 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-15 20:16:16,109 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 [2021-10-15 20:16:16,109 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 [2021-10-15 20:16:16,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:16:16,127 INFO L82 PathProgramCache]: Analyzing trace with hash 29883, now seen corresponding path program 1 times [2021-10-15 20:16:16,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:16:16,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060770134] [2021-10-15 20:16:16,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:16:16,140 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:16:16,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 20:16:16,250 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 20:16:16,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 20:16:16,297 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 20:16:16,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:16:16,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1450956, now seen corresponding path program 1 times [2021-10-15 20:16:16,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:16:16,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772260188] [2021-10-15 20:16:16,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:16:16,303 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:16:16,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 20:16:16,310 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 20:16:16,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 20:16:16,318 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 20:16:16,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:16:16,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1828301702, now seen corresponding path program 1 times [2021-10-15 20:16:16,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:16:16,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081133036] [2021-10-15 20:16:16,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:16:16,323 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:16:16,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 20:16:16,346 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 20:16:16,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 20:16:16,375 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 20:16:16,603 INFO L210 LassoAnalysis]: Preferences: [2021-10-15 20:16:16,604 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-15 20:16:16,604 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-15 20:16:16,604 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-15 20:16:16,605 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-15 20:16:16,605 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 20:16:16,605 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-15 20:16:16,605 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-15 20:16:16,606 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration1_Loop [2021-10-15 20:16:16,606 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-15 20:16:16,606 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-15 20:16:16,627 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 20:16:16,635 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 20:16:16,644 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 20:16:16,651 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 20:16:16,655 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 20:16:16,771 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-15 20:16:16,771 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-15 20:16:16,774 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 20:16:16,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:16:16,781 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 20:16:16,792 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-15 20:16:16,792 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-15 20:16:16,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-10-15 20:16:16,822 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-15 20:16:16,822 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-15 20:16:16,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-10-15 20:16:16,870 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 20:16:16,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:16:16,872 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 20:16:16,881 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-15 20:16:16,881 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-15 20:16:16,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-10-15 20:16:16,912 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-15 20:16:16,912 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-15 20:16:16,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-10-15 20:16:16,948 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 20:16:16,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:16:16,950 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 20:16:16,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-10-15 20:16:16,957 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-15 20:16:16,957 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-15 20:16:16,980 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-15 20:16:16,981 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-15 20:16:17,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-10-15 20:16:17,028 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 20:16:17,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:16:17,030 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 20:16:17,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-10-15 20:16:17,041 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-15 20:16:17,041 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-15 20:16:17,056 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-15 20:16:17,056 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-15 20:16:17,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-10-15 20:16:17,099 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 20:16:17,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:16:17,100 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 20:16:17,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-10-15 20:16:17,107 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-15 20:16:17,107 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-15 20:16:17,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-10-15 20:16:17,172 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 20:16:17,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:16:17,173 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 20:16:17,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-10-15 20:16:17,179 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-15 20:16:17,180 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-15 20:16:17,271 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-15 20:16:17,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-10-15 20:16:17,280 INFO L210 LassoAnalysis]: Preferences: [2021-10-15 20:16:17,280 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-15 20:16:17,280 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-15 20:16:17,280 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-15 20:16:17,280 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-15 20:16:17,280 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 20:16:17,280 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-15 20:16:17,280 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-15 20:16:17,281 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration1_Loop [2021-10-15 20:16:17,281 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-15 20:16:17,281 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-15 20:16:17,283 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 20:16:17,292 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 20:16:17,296 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 20:16:17,299 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 20:16:17,302 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 20:16:17,361 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-15 20:16:17,366 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-15 20:16:17,368 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 20:16:17,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:16:17,370 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 20:16:17,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-10-15 20:16:17,412 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 [2021-10-15 20:16:17,424 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-15 20:16:17,425 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-15 20:16:17,425 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-15 20:16:17,425 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-15 20:16:17,426 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-15 20:16:17,428 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-15 20:16:17,428 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-15 20:16:17,444 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-15 20:16:17,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-10-15 20:16:17,514 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 20:16:17,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:16:17,516 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 20:16:17,525 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 [2021-10-15 20:16:17,536 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-15 20:16:17,536 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-15 20:16:17,536 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-15 20:16:17,537 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-15 20:16:17,537 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-15 20:16:17,538 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-15 20:16:17,538 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-15 20:16:17,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-10-15 20:16:17,555 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-15 20:16:17,586 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Ended with exit code 0 [2021-10-15 20:16:17,587 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 20:16:17,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:16:17,588 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 20:16:17,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-10-15 20:16:17,590 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 [2021-10-15 20:16:17,601 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-15 20:16:17,601 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-15 20:16:17,601 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-15 20:16:17,601 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-15 20:16:17,601 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-15 20:16:17,603 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-15 20:16:17,603 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-15 20:16:17,611 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-15 20:16:17,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Ended with exit code 0 [2021-10-15 20:16:17,636 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 20:16:17,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:16:17,637 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 20:16:17,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-10-15 20:16:17,639 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-15 20:16:17,650 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-15 20:16:17,651 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-15 20:16:17,651 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-15 20:16:17,651 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-15 20:16:17,651 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-15 20:16:17,652 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-15 20:16:17,652 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-15 20:16:17,675 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-15 20:16:17,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-10-15 20:16:17,705 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 20:16:17,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:16:17,706 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 20:16:17,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-10-15 20:16:17,712 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 [2021-10-15 20:16:17,721 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-15 20:16:17,721 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-15 20:16:17,722 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-15 20:16:17,722 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-15 20:16:17,722 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-15 20:16:17,723 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-15 20:16:17,723 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-15 20:16:17,759 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-15 20:16:17,768 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-15 20:16:17,768 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-15 20:16:17,770 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 20:16:17,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:16:17,805 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 20:16:17,811 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-15 20:16:17,811 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-15 20:16:17,811 INFO L513 LassoAnalysis]: Proved termination. [2021-10-15 20:16:17,812 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2021-10-15 20:16:17,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-10-15 20:16:17,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-10-15 20:16:17,861 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-15 20:16:17,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:16:17,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Ended with exit code 0 [2021-10-15 20:16:17,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:18,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-15 20:16:18,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:16:18,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:18,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 20:16:18,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:16:18,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:16:18,138 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 [2021-10-15 20:16:18,140 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) [2021-10-15 20:16:18,251 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. [2021-10-15 20:16:18,252 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 [2021-10-15 20:16:18,254 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) [2021-10-15 20:16:18,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2021-10-15 20:16:18,257 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2021-10-15 20:16:18,259 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 20:16:18,259 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2021-10-15 20:16:18,260 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 20:16:18,260 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2021-10-15 20:16:18,260 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 20:16:18,261 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 48 states and 60 transitions. [2021-10-15 20:16:18,268 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-15 20:16:18,278 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 48 states to 25 states and 34 transitions. [2021-10-15 20:16:18,283 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2021-10-15 20:16:18,284 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2021-10-15 20:16:18,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2021-10-15 20:16:18,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-15 20:16:18,285 INFO L681 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-10-15 20:16:18,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2021-10-15 20:16:18,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2021-10-15 20:16:18,325 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) [2021-10-15 20:16:18,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2021-10-15 20:16:18,332 INFO L704 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-10-15 20:16:18,332 INFO L587 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-10-15 20:16:18,332 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-10-15 20:16:18,332 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2021-10-15 20:16:18,338 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-15 20:16:18,338 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-15 20:16:18,338 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-15 20:16:18,340 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:16:18,340 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:16:18,341 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 [2021-10-15 20:16:18,341 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 [2021-10-15 20:16:18,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:16:18,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1181449843, now seen corresponding path program 1 times [2021-10-15 20:16:18,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:16:18,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566999489] [2021-10-15 20:16:18,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:16:18,344 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:16:18,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:18,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-15 20:16:18,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:18,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 20:16:18,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:16:18,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566999489] [2021-10-15 20:16:18,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566999489] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:16:18,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:16:18,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 20:16:18,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336716680] [2021-10-15 20:16:18,532 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-15 20:16:18,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:16:18,532 INFO L82 PathProgramCache]: Analyzing trace with hash 246097683, now seen corresponding path program 1 times [2021-10-15 20:16:18,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:16:18,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268988075] [2021-10-15 20:16:18,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:16:18,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:16:18,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:18,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-10-15 20:16:18,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:18,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 20:16:18,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:16:18,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268988075] [2021-10-15 20:16:18,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268988075] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:16:18,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:16:18,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 20:16:18,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762703552] [2021-10-15 20:16:18,585 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-15 20:16:18,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:16:18,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 20:16:18,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:16:18,590 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) [2021-10-15 20:16:18,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:16:18,708 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-10-15 20:16:18,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 20:16:18,710 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2021-10-15 20:16:18,722 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-15 20:16:18,730 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2021-10-15 20:16:18,730 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2021-10-15 20:16:18,731 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2021-10-15 20:16:18,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2021-10-15 20:16:18,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-15 20:16:18,732 INFO L681 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-10-15 20:16:18,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2021-10-15 20:16:18,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-15 20:16:18,736 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) [2021-10-15 20:16:18,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-10-15 20:16:18,737 INFO L704 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-10-15 20:16:18,738 INFO L587 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-10-15 20:16:18,738 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-10-15 20:16:18,738 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2021-10-15 20:16:18,739 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-15 20:16:18,739 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-15 20:16:18,740 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-15 20:16:18,741 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:16:18,741 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-10-15 20:16:18,741 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 [2021-10-15 20:16:18,741 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 [2021-10-15 20:16:18,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:16:18,742 INFO L82 PathProgramCache]: Analyzing trace with hash 2029785426, now seen corresponding path program 1 times [2021-10-15 20:16:18,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:16:18,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149249545] [2021-10-15 20:16:18,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:16:18,743 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:16:18,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:18,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-15 20:16:18,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:18,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:16:18,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:16:18,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149249545] [2021-10-15 20:16:18,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149249545] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:16:18,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369609027] [2021-10-15 20:16:18,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:16:18,832 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:16:18,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:16:18,834 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:16:18,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-15 20:16:18,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:18,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-15 20:16:18,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:16:18,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:16:18,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369609027] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:16:18,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:16:18,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-15 20:16:18,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646572504] [2021-10-15 20:16:18,998 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-15 20:16:18,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:16:18,999 INFO L82 PathProgramCache]: Analyzing trace with hash -960881524, now seen corresponding path program 1 times [2021-10-15 20:16:18,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:16:18,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758996845] [2021-10-15 20:16:18,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:16:19,000 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:16:19,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 20:16:19,020 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 20:16:19,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 20:16:19,028 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 20:16:19,258 INFO L210 LassoAnalysis]: Preferences: [2021-10-15 20:16:19,258 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-15 20:16:19,259 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-15 20:16:19,259 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-15 20:16:19,259 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-15 20:16:19,259 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 20:16:19,259 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-15 20:16:19,260 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-15 20:16:19,260 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration3_Loop [2021-10-15 20:16:19,260 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-15 20:16:19,260 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-15 20:16:19,263 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 20:16:19,266 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 20:16:19,277 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 20:16:19,281 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 20:16:19,335 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-15 20:16:19,336 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-15 20:16:19,336 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 20:16:19,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:16:19,337 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 20:16:19,345 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-15 20:16:19,345 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-15 20:16:19,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-10-15 20:16:19,368 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-15 20:16:19,368 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-15 20:16:19,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-10-15 20:16:19,413 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 20:16:19,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:16:19,415 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 20:16:19,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-10-15 20:16:19,420 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-15 20:16:19,420 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-15 20:16:19,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-10-15 20:16:19,486 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 20:16:19,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:16:19,487 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 20:16:19,495 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-15 20:16:19,495 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-15 20:16:19,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-10-15 20:16:20,834 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-15 20:16:20,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-10-15 20:16:20,838 INFO L210 LassoAnalysis]: Preferences: [2021-10-15 20:16:20,838 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-15 20:16:20,839 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-15 20:16:20,839 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-15 20:16:20,839 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-15 20:16:20,839 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 20:16:20,839 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-15 20:16:20,839 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-15 20:16:20,839 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration3_Loop [2021-10-15 20:16:20,839 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-15 20:16:20,839 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-15 20:16:20,840 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 20:16:20,845 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 20:16:20,868 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 20:16:20,871 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 20:16:20,919 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-15 20:16:20,919 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-15 20:16:20,919 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 20:16:20,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:16:20,921 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 20:16:20,933 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 [2021-10-15 20:16:20,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-10-15 20:16:20,942 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-15 20:16:20,942 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-15 20:16:20,943 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-15 20:16:20,943 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-15 20:16:20,943 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-15 20:16:20,943 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-15 20:16:20,943 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-15 20:16:20,963 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-15 20:16:20,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-10-15 20:16:20,994 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 20:16:20,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:16:20,995 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 20:16:20,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-10-15 20:16:21,001 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 [2021-10-15 20:16:21,011 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-15 20:16:21,011 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-15 20:16:21,011 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-15 20:16:21,012 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-15 20:16:21,012 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-15 20:16:21,014 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-15 20:16:21,014 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-15 20:16:21,031 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-15 20:16:21,035 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-15 20:16:21,035 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-15 20:16:21,035 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 20:16:21,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:16:21,037 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 20:16:21,043 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-15 20:16:21,044 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-15 20:16:21,044 INFO L513 LassoAnalysis]: Proved termination. [2021-10-15 20:16:21,044 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2021-10-15 20:16:21,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-10-15 20:16:21,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-10-15 20:16:21,071 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-15 20:16:21,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:16:21,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:21,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-15 20:16:21,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:16:21,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:21,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-15 20:16:21,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:16:21,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:16:21,563 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 [2021-10-15 20:16:21,563 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) [2021-10-15 20:16:21,827 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. [2021-10-15 20:16:21,828 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 [2021-10-15 20:16:21,828 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) [2021-10-15 20:16:21,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2021-10-15 20:16:21,830 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 10 letters. [2021-10-15 20:16:21,830 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 20:16:21,831 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 22 letters. Loop has 10 letters. [2021-10-15 20:16:21,831 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 20:16:21,831 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 20 letters. [2021-10-15 20:16:21,832 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 20:16:21,833 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 183 transitions. [2021-10-15 20:16:21,841 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-10-15 20:16:21,848 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 108 states and 152 transitions. [2021-10-15 20:16:21,849 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 64 [2021-10-15 20:16:21,849 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2021-10-15 20:16:21,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 152 transitions. [2021-10-15 20:16:21,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-15 20:16:21,850 INFO L681 BuchiCegarLoop]: Abstraction has 108 states and 152 transitions. [2021-10-15 20:16:21,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states and 152 transitions. [2021-10-15 20:16:21,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2021-10-15 20:16:21,867 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) [2021-10-15 20:16:21,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2021-10-15 20:16:21,870 INFO L704 BuchiCegarLoop]: Abstraction has 94 states and 126 transitions. [2021-10-15 20:16:21,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:16:21,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 20:16:21,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-15 20:16:21,871 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) [2021-10-15 20:16:21,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:16:21,970 INFO L93 Difference]: Finished difference Result 109 states and 147 transitions. [2021-10-15 20:16:21,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 20:16:21,971 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 109 states and 147 transitions. [2021-10-15 20:16:21,976 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-10-15 20:16:21,981 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 109 states to 106 states and 144 transitions. [2021-10-15 20:16:21,981 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 69 [2021-10-15 20:16:21,982 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2021-10-15 20:16:21,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 144 transitions. [2021-10-15 20:16:21,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-15 20:16:21,982 INFO L681 BuchiCegarLoop]: Abstraction has 106 states and 144 transitions. [2021-10-15 20:16:21,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states and 144 transitions. [2021-10-15 20:16:21,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2021-10-15 20:16:21,996 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) [2021-10-15 20:16:21,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 125 transitions. [2021-10-15 20:16:21,999 INFO L704 BuchiCegarLoop]: Abstraction has 94 states and 125 transitions. [2021-10-15 20:16:21,999 INFO L587 BuchiCegarLoop]: Abstraction has 94 states and 125 transitions. [2021-10-15 20:16:21,999 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-10-15 20:16:21,999 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 94 states and 125 transitions. [2021-10-15 20:16:22,002 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-10-15 20:16:22,002 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-15 20:16:22,002 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-15 20:16:22,005 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:16:22,005 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2021-10-15 20:16:22,005 INFO L791 eck$LassoCheckResult]: Stem: 736#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 737#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 743#L27 call main_#t~ret9 := fibo(main_~x~0);< 754#fiboENTRY ~n := #in~n; 798#L8 assume !(~n < 1); 778#L10 assume !(1 == ~n); 742#L13 call #t~ret7 := fibo(~n - 1);< 744#fiboENTRY ~n := #in~n; 759#L8 assume !(~n < 1); 775#L10 assume !(1 == ~n); 758#L13 call #t~ret7 := fibo(~n - 1);< 744#fiboENTRY ~n := #in~n; 759#L8 assume !(~n < 1); 775#L10 assume !(1 == ~n); 758#L13 call #t~ret7 := fibo(~n - 1);< 744#fiboENTRY ~n := #in~n; 760#L8 assume !(~n < 1); 797#L10 assume 1 == ~n;#res := 1; 796#fiboFINAL assume true; 795#fiboEXIT >#33#return; 756#L13-1 call #t~ret8 := fibo(~n - 2);< 755#fiboENTRY ~n := #in~n; 757#L8 assume ~n < 1;#res := 0; 774#fiboFINAL assume true; 825#fiboEXIT >#35#return; 821#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 819#fiboFINAL assume true; 817#fiboEXIT >#33#return; 739#L13-1 [2021-10-15 20:16:22,005 INFO L793 eck$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 [2021-10-15 20:16:22,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:16:22,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1557778097, now seen corresponding path program 1 times [2021-10-15 20:16:22,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:16:22,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572510752] [2021-10-15 20:16:22,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:16:22,007 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:16:22,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:22,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-15 20:16:22,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:22,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-15 20:16:22,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:22,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-15 20:16:22,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:22,212 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-15 20:16:22,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:16:22,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572510752] [2021-10-15 20:16:22,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572510752] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:16:22,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125359806] [2021-10-15 20:16:22,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:16:22,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:16:22,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:16:22,232 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:16:22,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-15 20:16:22,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:22,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-15 20:16:22,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:16:22,447 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-15 20:16:22,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125359806] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:16:22,447 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:16:22,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-10-15 20:16:22,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903358485] [2021-10-15 20:16:22,448 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-15 20:16:22,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:16:22,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1616897917, now seen corresponding path program 1 times [2021-10-15 20:16:22,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:16:22,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998870450] [2021-10-15 20:16:22,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:16:22,450 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:16:22,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:22,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-10-15 20:16:22,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:22,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-15 20:16:22,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:22,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-15 20:16:22,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:22,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-15 20:16:22,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:22,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-15 20:16:22,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:22,668 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 26 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-15 20:16:22,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:16:22,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998870450] [2021-10-15 20:16:22,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998870450] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:16:22,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537226846] [2021-10-15 20:16:22,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:16:22,669 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:16:22,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:16:22,678 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:16:22,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2021-10-15 20:16:22,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-15 20:16:22,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:22,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-15 20:16:22,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:16:22,901 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-15 20:16:22,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537226846] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:16:22,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:16:22,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-10-15 20:16:22,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328032879] [2021-10-15 20:16:22,904 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-15 20:16:22,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:16:22,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-15 20:16:22,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-15 20:16:22,905 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) [2021-10-15 20:16:23,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:16:23,130 INFO L93 Difference]: Finished difference Result 116 states and 159 transitions. [2021-10-15 20:16:23,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 20:16:23,130 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 116 states and 159 transitions. [2021-10-15 20:16:23,143 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2021-10-15 20:16:23,153 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 116 states to 114 states and 157 transitions. [2021-10-15 20:16:23,153 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2021-10-15 20:16:23,155 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2021-10-15 20:16:23,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 114 states and 157 transitions. [2021-10-15 20:16:23,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-15 20:16:23,156 INFO L681 BuchiCegarLoop]: Abstraction has 114 states and 157 transitions. [2021-10-15 20:16:23,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states and 157 transitions. [2021-10-15 20:16:23,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-10-15 20:16:23,174 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) [2021-10-15 20:16:23,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 157 transitions. [2021-10-15 20:16:23,187 INFO L704 BuchiCegarLoop]: Abstraction has 114 states and 157 transitions. [2021-10-15 20:16:23,187 INFO L587 BuchiCegarLoop]: Abstraction has 114 states and 157 transitions. [2021-10-15 20:16:23,187 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-10-15 20:16:23,187 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 114 states and 157 transitions. [2021-10-15 20:16:23,195 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2021-10-15 20:16:23,195 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-15 20:16:23,196 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-15 20:16:23,201 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:16:23,201 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [8, 7, 6, 4, 4, 4, 4, 3, 3, 2, 2] [2021-10-15 20:16:23,201 INFO L791 eck$LassoCheckResult]: Stem: 1247#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 1248#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 1265#L27 call main_#t~ret9 := fibo(main_~x~0);< 1266#fiboENTRY ~n := #in~n; 1312#L8 assume !(~n < 1); 1311#L10 assume !(1 == ~n); 1254#L13 call #t~ret7 := fibo(~n - 1);< 1273#fiboENTRY ~n := #in~n; 1274#L8 assume !(~n < 1); 1284#L10 assume !(1 == ~n); 1253#L13 call #t~ret7 := fibo(~n - 1);< 1255#fiboENTRY ~n := #in~n; 1309#L8 assume !(~n < 1); 1307#L10 assume !(1 == ~n); 1257#L13 call #t~ret7 := fibo(~n - 1);< 1255#fiboENTRY ~n := #in~n; 1309#L8 assume !(~n < 1); 1307#L10 assume !(1 == ~n); 1257#L13 call #t~ret7 := fibo(~n - 1);< 1255#fiboENTRY ~n := #in~n; 1310#L8 assume !(~n < 1); 1308#L10 assume 1 == ~n;#res := 1; 1306#fiboFINAL assume true; 1305#fiboEXIT >#33#return; 1280#L13-1 call #t~ret8 := fibo(~n - 2);< 1304#fiboENTRY ~n := #in~n; 1282#L8 assume ~n < 1;#res := 0; 1283#fiboFINAL assume true; 1279#fiboEXIT >#35#return; 1256#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1258#fiboFINAL assume true; 1275#fiboEXIT >#33#return; 1269#L13-1 [2021-10-15 20:16:23,201 INFO L793 eck$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 [2021-10-15 20:16:23,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:16:23,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1730264506, now seen corresponding path program 2 times [2021-10-15 20:16:23,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:16:23,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268131881] [2021-10-15 20:16:23,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:16:23,203 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:16:23,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 20:16:23,238 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 20:16:23,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 20:16:23,284 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 20:16:23,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:16:23,284 INFO L82 PathProgramCache]: Analyzing trace with hash 564146419, now seen corresponding path program 2 times [2021-10-15 20:16:23,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:16:23,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853022938] [2021-10-15 20:16:23,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:16:23,285 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:16:23,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:23,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-10-15 20:16:23,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:23,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-15 20:16:23,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:23,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-15 20:16:23,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:23,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-15 20:16:23,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:23,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-10-15 20:16:23,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:23,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-15 20:16:23,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:23,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-15 20:16:23,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:23,542 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 45 proven. 31 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-10-15 20:16:23,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:16:23,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853022938] [2021-10-15 20:16:23,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853022938] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:16:23,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793557158] [2021-10-15 20:16:23,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 20:16:23,546 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:16:23,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:16:23,548 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:16:23,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-15 20:16:23,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 20:16:23,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:16:23,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-15 20:16:23,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:16:23,854 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 38 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-10-15 20:16:23,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793557158] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:16:23,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:16:23,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-10-15 20:16:23,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814802383] [2021-10-15 20:16:23,860 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-15 20:16:23,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:16:23,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-15 20:16:23,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-10-15 20:16:23,863 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) [2021-10-15 20:16:24,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:16:24,065 INFO L93 Difference]: Finished difference Result 65 states and 84 transitions. [2021-10-15 20:16:24,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 20:16:24,066 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 65 states and 84 transitions. [2021-10-15 20:16:24,071 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-10-15 20:16:24,078 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 65 states to 59 states and 77 transitions. [2021-10-15 20:16:24,078 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 48 [2021-10-15 20:16:24,080 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 48 [2021-10-15 20:16:24,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 77 transitions. [2021-10-15 20:16:24,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-15 20:16:24,083 INFO L681 BuchiCegarLoop]: Abstraction has 59 states and 77 transitions. [2021-10-15 20:16:24,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states and 77 transitions. [2021-10-15 20:16:24,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2021-10-15 20:16:24,098 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) [2021-10-15 20:16:24,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2021-10-15 20:16:24,100 INFO L704 BuchiCegarLoop]: Abstraction has 56 states and 70 transitions. [2021-10-15 20:16:24,100 INFO L587 BuchiCegarLoop]: Abstraction has 56 states and 70 transitions. [2021-10-15 20:16:24,100 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-10-15 20:16:24,100 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 56 states and 70 transitions. [2021-10-15 20:16:24,102 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-10-15 20:16:24,102 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-15 20:16:24,102 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-15 20:16:24,109 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [8, 6, 5, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-10-15 20:16:24,109 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1] [2021-10-15 20:16:24,110 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 [2021-10-15 20:16:24,112 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 [2021-10-15 20:16:24,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:16:24,114 INFO L82 PathProgramCache]: Analyzing trace with hash -2124338928, now seen corresponding path program 3 times [2021-10-15 20:16:24,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:16:24,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918366339] [2021-10-15 20:16:24,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:16:24,115 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:16:24,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:24,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-15 20:16:24,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:24,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-15 20:16:24,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:24,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-15 20:16:24,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:24,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-15 20:16:24,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:24,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-10-15 20:16:24,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:24,339 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 35 proven. 51 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-15 20:16:24,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:16:24,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918366339] [2021-10-15 20:16:24,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918366339] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:16:24,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574930223] [2021-10-15 20:16:24,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 20:16:24,340 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:16:24,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:16:24,345 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:16:24,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-15 20:16:24,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-15 20:16:24,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:16:24,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-15 20:16:24,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:16:24,669 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-10-15 20:16:24,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574930223] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:16:24,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:16:24,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 18 [2021-10-15 20:16:24,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081841719] [2021-10-15 20:16:24,675 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-15 20:16:24,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:16:24,676 INFO L82 PathProgramCache]: Analyzing trace with hash -176759904, now seen corresponding path program 3 times [2021-10-15 20:16:24,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:16:24,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45450659] [2021-10-15 20:16:24,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:16:24,677 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:16:24,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:24,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-10-15 20:16:24,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:24,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-15 20:16:24,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:24,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-15 20:16:24,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:24,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-15 20:16:24,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:24,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-10-15 20:16:24,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:24,782 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-15 20:16:24,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:16:24,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45450659] [2021-10-15 20:16:24,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45450659] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:16:24,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269070632] [2021-10-15 20:16:24,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 20:16:24,783 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:16:24,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:16:24,785 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:16:24,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-15 20:16:24,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-15 20:16:24,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:16:24,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-15 20:16:24,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:16:25,090 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-15 20:16:25,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269070632] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:16:25,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:16:25,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-10-15 20:16:25,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465671007] [2021-10-15 20:16:25,092 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-15 20:16:25,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:16:25,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 20:16:25,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-10-15 20:16:25,093 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) [2021-10-15 20:16:25,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:16:25,194 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2021-10-15 20:16:25,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 20:16:25,195 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 56 states and 66 transitions. [2021-10-15 20:16:25,196 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-10-15 20:16:25,197 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 56 states to 56 states and 66 transitions. [2021-10-15 20:16:25,198 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 45 [2021-10-15 20:16:25,198 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 45 [2021-10-15 20:16:25,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 66 transitions. [2021-10-15 20:16:25,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-15 20:16:25,198 INFO L681 BuchiCegarLoop]: Abstraction has 56 states and 66 transitions. [2021-10-15 20:16:25,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states and 66 transitions. [2021-10-15 20:16:25,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2021-10-15 20:16:25,203 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) [2021-10-15 20:16:25,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-10-15 20:16:25,204 INFO L704 BuchiCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-10-15 20:16:25,204 INFO L587 BuchiCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-10-15 20:16:25,204 INFO L425 BuchiCegarLoop]: ======== Iteration 7============ [2021-10-15 20:16:25,204 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 54 states and 64 transitions. [2021-10-15 20:16:25,205 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-15 20:16:25,205 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-15 20:16:25,206 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-15 20:16:25,207 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [8, 7, 5, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-10-15 20:16:25,207 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2021-10-15 20:16:25,208 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 [2021-10-15 20:16:25,208 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 [2021-10-15 20:16:25,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:16:25,208 INFO L82 PathProgramCache]: Analyzing trace with hash -690973043, now seen corresponding path program 4 times [2021-10-15 20:16:25,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:16:25,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846862256] [2021-10-15 20:16:25,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:16:25,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:16:25,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:25,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-15 20:16:25,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:25,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-15 20:16:25,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:25,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-15 20:16:25,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:25,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-15 20:16:25,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:25,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-10-15 20:16:25,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:25,423 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 28 proven. 60 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-15 20:16:25,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:16:25,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846862256] [2021-10-15 20:16:25,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846862256] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:16:25,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857289009] [2021-10-15 20:16:25,424 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 20:16:25,424 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:16:25,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:16:25,429 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:16:25,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-15 20:16:25,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 20:16:25,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:16:25,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-15 20:16:25,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:16:25,836 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 26 proven. 65 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-15 20:16:25,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857289009] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:16:25,836 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:16:25,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 16 [2021-10-15 20:16:25,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74379672] [2021-10-15 20:16:25,838 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-15 20:16:25,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:16:25,839 INFO L82 PathProgramCache]: Analyzing trace with hash -445565443, now seen corresponding path program 4 times [2021-10-15 20:16:25,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:16:25,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216135401] [2021-10-15 20:16:25,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:16:25,839 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:16:25,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 20:16:25,853 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 20:16:25,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 20:16:25,867 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 20:16:26,414 INFO L210 LassoAnalysis]: Preferences: [2021-10-15 20:16:26,415 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-15 20:16:26,415 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-15 20:16:26,415 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-15 20:16:26,415 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-15 20:16:26,415 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 20:16:26,415 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-15 20:16:26,415 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-15 20:16:26,415 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration7_Loop [2021-10-15 20:16:26,415 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-15 20:16:26,415 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-15 20:16:26,416 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 20:16:26,429 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 20:16:26,432 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 20:16:26,435 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 20:16:26,504 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-15 20:16:26,504 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-15 20:16:26,505 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 20:16:26,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:16:26,509 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 20:16:26,516 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-15 20:16:26,516 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-15 20:16:26,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-10-15 20:16:26,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2021-10-15 20:16:26,590 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 20:16:26,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:16:26,591 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 20:16:26,595 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-15 20:16:26,595 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-15 20:16:26,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-10-15 20:16:27,471 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-15 20:16:27,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2021-10-15 20:16:27,475 INFO L210 LassoAnalysis]: Preferences: [2021-10-15 20:16:27,475 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-15 20:16:27,475 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-15 20:16:27,475 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-15 20:16:27,475 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-15 20:16:27,475 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 20:16:27,476 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-15 20:16:27,476 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-15 20:16:27,477 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration7_Loop [2021-10-15 20:16:27,477 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-15 20:16:27,477 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-15 20:16:27,478 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 20:16:27,498 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 20:16:27,500 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 20:16:27,503 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 20:16:27,583 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-15 20:16:27,583 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-15 20:16:27,583 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 20:16:27,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:16:27,585 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 20:16:27,592 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 [2021-10-15 20:16:27,604 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-15 20:16:27,604 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-15 20:16:27,604 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-15 20:16:27,604 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-15 20:16:27,604 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-15 20:16:27,606 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-15 20:16:27,606 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-15 20:16:27,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2021-10-15 20:16:27,627 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-15 20:16:27,630 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-10-15 20:16:27,630 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-10-15 20:16:27,631 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 20:16:27,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:16:27,633 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 20:16:27,634 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-15 20:16:27,634 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-15 20:16:27,634 INFO L513 LassoAnalysis]: Proved termination. [2021-10-15 20:16:27,635 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2021-10-15 20:16:27,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2021-10-15 20:16:27,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2021-10-15 20:16:27,673 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-15 20:16:27,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:16:27,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:27,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-15 20:16:27,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:16:28,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2021-10-15 20:16:28,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:28,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-15 20:16:28,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:16:28,948 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 14 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-15 20:16:28,949 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 [2021-10-15 20:16:28,950 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) [2021-10-15 20:16:29,060 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. [2021-10-15 20:16:29,061 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 [2021-10-15 20:16:29,061 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) [2021-10-15 20:16:29,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 17 transitions. [2021-10-15 20:16:29,062 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 45 letters. Loop has 35 letters. [2021-10-15 20:16:29,062 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 20:16:29,062 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-15 20:16:29,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:16:29,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:29,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-15 20:16:29,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:16:29,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:29,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-15 20:16:29,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:16:30,211 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 14 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-15 20:16:30,212 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 [2021-10-15 20:16:30,212 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) [2021-10-15 20:16:30,349 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. [2021-10-15 20:16:30,354 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 [2021-10-15 20:16:30,355 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) [2021-10-15 20:16:30,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 17 transitions. [2021-10-15 20:16:30,355 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 45 letters. Loop has 35 letters. [2021-10-15 20:16:30,356 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 20:16:30,356 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-15 20:16:30,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:16:30,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:30,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-15 20:16:30,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:16:31,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:31,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-15 20:16:31,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:16:31,527 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 14 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-15 20:16:31,528 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 [2021-10-15 20:16:31,528 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) [2021-10-15 20:16:31,913 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. [2021-10-15 20:16:31,914 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 [2021-10-15 20:16:31,915 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) [2021-10-15 20:16:31,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 52 transitions. [2021-10-15 20:16:31,916 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 45 letters. Loop has 35 letters. [2021-10-15 20:16:31,918 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 20:16:31,918 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 80 letters. Loop has 35 letters. [2021-10-15 20:16:31,920 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 20:16:31,920 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 45 letters. Loop has 70 letters. [2021-10-15 20:16:31,923 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 20:16:31,923 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 353 states and 439 transitions. [2021-10-15 20:16:31,931 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-15 20:16:31,938 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 353 states to 221 states and 281 transitions. [2021-10-15 20:16:31,938 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 78 [2021-10-15 20:16:31,939 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 105 [2021-10-15 20:16:31,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 221 states and 281 transitions. [2021-10-15 20:16:31,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-15 20:16:31,939 INFO L681 BuchiCegarLoop]: Abstraction has 221 states and 281 transitions. [2021-10-15 20:16:31,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states and 281 transitions. [2021-10-15 20:16:31,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 213. [2021-10-15 20:16:31,954 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) [2021-10-15 20:16:31,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 259 transitions. [2021-10-15 20:16:31,957 INFO L704 BuchiCegarLoop]: Abstraction has 213 states and 259 transitions. [2021-10-15 20:16:31,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:16:31,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-15 20:16:31,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-10-15 20:16:31,958 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) [2021-10-15 20:16:32,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:16:32,326 INFO L93 Difference]: Finished difference Result 124 states and 131 transitions. [2021-10-15 20:16:32,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-15 20:16:32,327 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 124 states and 131 transitions. [2021-10-15 20:16:32,329 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-10-15 20:16:32,331 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 124 states to 63 states and 66 transitions. [2021-10-15 20:16:32,331 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 49 [2021-10-15 20:16:32,331 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 52 [2021-10-15 20:16:32,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 66 transitions. [2021-10-15 20:16:32,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-15 20:16:32,331 INFO L681 BuchiCegarLoop]: Abstraction has 63 states and 66 transitions. [2021-10-15 20:16:32,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states and 66 transitions. [2021-10-15 20:16:32,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2021-10-15 20:16:32,334 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) [2021-10-15 20:16:32,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2021-10-15 20:16:32,335 INFO L704 BuchiCegarLoop]: Abstraction has 62 states and 65 transitions. [2021-10-15 20:16:32,335 INFO L587 BuchiCegarLoop]: Abstraction has 62 states and 65 transitions. [2021-10-15 20:16:32,336 INFO L425 BuchiCegarLoop]: ======== Iteration 8============ [2021-10-15 20:16:32,336 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 62 states and 65 transitions. [2021-10-15 20:16:32,337 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-10-15 20:16:32,337 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-15 20:16:32,337 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-15 20:16:32,338 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [9, 8, 6, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2021-10-15 20:16:32,338 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-15 20:16:32,339 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 [2021-10-15 20:16:32,339 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 [2021-10-15 20:16:32,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:16:32,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1327795734, now seen corresponding path program 5 times [2021-10-15 20:16:32,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:16:32,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760612133] [2021-10-15 20:16:32,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:16:32,340 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:16:32,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:32,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-15 20:16:32,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:32,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-15 20:16:32,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:32,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-15 20:16:32,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:32,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-15 20:16:32,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:32,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-10-15 20:16:32,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:32,474 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 53 proven. 32 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-15 20:16:32,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:16:32,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760612133] [2021-10-15 20:16:32,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760612133] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:16:32,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780772892] [2021-10-15 20:16:32,475 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 20:16:32,475 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:16:32,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:16:32,476 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:16:32,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-15 20:16:32,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-10-15 20:16:32,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:16:32,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-15 20:16:32,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:16:33,118 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 58 proven. 35 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-10-15 20:16:33,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780772892] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:16:33,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:16:33,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 14 [2021-10-15 20:16:33,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850171592] [2021-10-15 20:16:33,121 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-15 20:16:33,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:16:33,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1893846, now seen corresponding path program 2 times [2021-10-15 20:16:33,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:16:33,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176176956] [2021-10-15 20:16:33,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:16:33,123 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:16:33,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 20:16:33,133 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 20:16:33,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 20:16:33,138 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 20:16:33,205 INFO L210 LassoAnalysis]: Preferences: [2021-10-15 20:16:33,205 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-15 20:16:33,205 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-15 20:16:33,205 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-15 20:16:33,205 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-15 20:16:33,206 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 20:16:33,206 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-15 20:16:33,206 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-15 20:16:33,206 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration8_Loop [2021-10-15 20:16:33,206 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-15 20:16:33,206 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-15 20:16:33,208 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 20:16:33,218 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 20:16:33,221 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 20:16:33,223 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 20:16:33,282 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-15 20:16:33,283 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-15 20:16:33,283 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 20:16:33,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:16:33,284 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 20:16:33,292 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-15 20:16:33,292 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-15 20:16:33,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2021-10-15 20:16:33,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Forceful destruction successful, exit code 0 [2021-10-15 20:16:33,333 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 20:16:33,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:16:33,334 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 20:16:33,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2021-10-15 20:16:33,336 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-15 20:16:33,336 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-15 20:16:36,208 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-15 20:16:36,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Ended with exit code 0 [2021-10-15 20:16:36,214 INFO L210 LassoAnalysis]: Preferences: [2021-10-15 20:16:36,214 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-15 20:16:36,214 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-15 20:16:36,214 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-15 20:16:36,214 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-15 20:16:36,214 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 20:16:36,214 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-15 20:16:36,214 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-15 20:16:36,214 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration8_Loop [2021-10-15 20:16:36,214 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-15 20:16:36,214 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-15 20:16:36,215 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 20:16:36,223 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 20:16:36,225 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 20:16:36,226 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-15 20:16:36,270 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-15 20:16:36,270 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-15 20:16:36,270 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 20:16:36,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:16:36,276 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 20:16:36,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2021-10-15 20:16:36,282 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 [2021-10-15 20:16:36,291 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-15 20:16:36,291 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-15 20:16:36,291 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-15 20:16:36,291 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-15 20:16:36,291 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-15 20:16:36,292 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-15 20:16:36,292 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-15 20:16:36,295 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-15 20:16:36,298 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-15 20:16:36,298 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-15 20:16:36,298 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 20:16:36,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:16:36,299 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 20:16:36,302 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-15 20:16:36,302 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-15 20:16:36,302 INFO L513 LassoAnalysis]: Proved termination. [2021-10-15 20:16:36,302 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2021-10-15 20:16:36,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2021-10-15 20:16:36,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Forceful destruction successful, exit code 0 [2021-10-15 20:16:36,327 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-15 20:16:36,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:16:36,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:36,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-15 20:16:36,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:16:36,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Forceful destruction successful, exit code 0 [2021-10-15 20:16:37,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:37,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 20:16:37,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:16:37,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:16:37,239 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 [2021-10-15 20:16:37,239 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) [2021-10-15 20:16:37,301 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. [2021-10-15 20:16:37,303 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 [2021-10-15 20:16:37,303 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) [2021-10-15 20:16:37,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2021-10-15 20:16:37,304 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 49 letters. Loop has 4 letters. [2021-10-15 20:16:37,304 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 20:16:37,304 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-15 20:16:37,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:16:37,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:37,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-15 20:16:37,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:16:38,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:38,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 20:16:38,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:16:38,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:16:38,174 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 [2021-10-15 20:16:38,174 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) [2021-10-15 20:16:38,263 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. [2021-10-15 20:16:38,264 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 [2021-10-15 20:16:38,265 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) [2021-10-15 20:16:38,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2021-10-15 20:16:38,265 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 49 letters. Loop has 4 letters. [2021-10-15 20:16:38,265 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 20:16:38,265 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-15 20:16:38,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:16:38,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:38,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-15 20:16:38,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:16:39,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:39,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 20:16:39,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:16:39,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:16:39,195 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 [2021-10-15 20:16:39,196 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) [2021-10-15 20:16:39,272 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. [2021-10-15 20:16:39,273 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 [2021-10-15 20:16:39,273 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) [2021-10-15 20:16:39,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2021-10-15 20:16:39,274 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 49 letters. Loop has 4 letters. [2021-10-15 20:16:39,274 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 20:16:39,274 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 53 letters. Loop has 4 letters. [2021-10-15 20:16:39,275 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 20:16:39,275 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 49 letters. Loop has 8 letters. [2021-10-15 20:16:39,276 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-15 20:16:39,276 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 86 states and 93 transitions. [2021-10-15 20:16:39,278 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-15 20:16:39,279 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 86 states to 0 states and 0 transitions. [2021-10-15 20:16:39,279 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-10-15 20:16:39,279 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-10-15 20:16:39,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-10-15 20:16:39,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:16:39,279 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-15 20:16:39,280 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-15 20:16:39,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:16:39,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-15 20:16:39,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-10-15 20:16:39,281 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) [2021-10-15 20:16:39,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:16:39,281 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2021-10-15 20:16:39,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 20:16:39,282 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2021-10-15 20:16:39,282 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-15 20:16:39,282 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2021-10-15 20:16:39,282 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-10-15 20:16:39,282 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-10-15 20:16:39,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-10-15 20:16:39,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:16:39,283 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-15 20:16:39,283 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-15 20:16:39,283 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-15 20:16:39,283 INFO L425 BuchiCegarLoop]: ======== Iteration 9============ [2021-10-15 20:16:39,283 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-10-15 20:16:39,284 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-15 20:16:39,284 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-10-15 20:16:39,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 15.10 08:16:39 BoogieIcfgContainer [2021-10-15 20:16:39,291 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-10-15 20:16:39,292 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 20:16:39,292 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 20:16:39,292 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 20:16:39,293 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:16:15" (3/4) ... [2021-10-15 20:16:39,296 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-15 20:16:39,296 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 20:16:39,298 INFO L168 Benchmark]: Toolchain (without parser) took 24013.91 ms. Allocated memory was 117.4 MB in the beginning and 180.4 MB in the end (delta: 62.9 MB). Free memory was 82.1 MB in the beginning and 122.0 MB in the end (delta: -39.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 16.1 GB. [2021-10-15 20:16:39,299 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 117.4 MB. Free memory was 91.6 MB in the beginning and 91.6 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:16:39,299 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.42 ms. Allocated memory is still 117.4 MB. Free memory was 82.1 MB in the beginning and 93.1 MB in the end (delta: -11.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 20:16:39,300 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.46 ms. Allocated memory is still 117.4 MB. Free memory was 93.1 MB in the beginning and 91.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:16:39,300 INFO L168 Benchmark]: Boogie Preprocessor took 22.63 ms. Allocated memory is still 117.4 MB. Free memory was 91.7 MB in the beginning and 91.0 MB in the end (delta: 709.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:16:39,300 INFO L168 Benchmark]: RCFGBuilder took 314.58 ms. Allocated memory is still 117.4 MB. Free memory was 91.0 MB in the beginning and 81.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-15 20:16:39,301 INFO L168 Benchmark]: BuchiAutomizer took 23312.50 ms. Allocated memory was 117.4 MB in the beginning and 180.4 MB in the end (delta: 62.9 MB). Free memory was 81.2 MB in the beginning and 123.0 MB in the end (delta: -41.8 MB). Peak memory consumption was 22.9 MB. Max. memory is 16.1 GB. [2021-10-15 20:16:39,301 INFO L168 Benchmark]: Witness Printer took 4.95 ms. Allocated memory is still 180.4 MB. Free memory was 123.0 MB in the beginning and 122.0 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:16:39,304 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 117.4 MB. Free memory was 91.6 MB in the beginning and 91.6 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 316.42 ms. Allocated memory is still 117.4 MB. Free memory was 82.1 MB in the beginning and 93.1 MB in the end (delta: -11.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.46 ms. Allocated memory is still 117.4 MB. Free memory was 93.1 MB in the beginning and 91.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.63 ms. Allocated memory is still 117.4 MB. Free memory was 91.7 MB in the beginning and 91.0 MB in the end (delta: 709.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 314.58 ms. Allocated memory is still 117.4 MB. Free memory was 91.0 MB in the beginning and 81.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 23312.50 ms. Allocated memory was 117.4 MB in the beginning and 180.4 MB in the end (delta: 62.9 MB). Free memory was 81.2 MB in the beginning and 123.0 MB in the end (delta: -41.8 MB). Peak memory consumption was 22.9 MB. Max. memory is 16.1 GB. * Witness Printer took 4.95 ms. Allocated memory is still 180.4 MB. Free memory was 123.0 MB in the beginning and 122.0 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 11 terminating modules (7 trivial, 2 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 9 locations. One nondeterministic module has affine ranking function n and consists of 11 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. 7 modules have a trivial ranking function, the largest among these consists of 17 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 23.2s and 9 iterations. TraceHistogramMax:9. Analysis of lassos took 13.3s. Construction of modules took 0.9s. Büchi inclusion checks took 8.5s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 9. Automata minimization 144.5ms 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, 912.9ms 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: 76ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 5 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 5.6s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-10-15 20:16:39,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-15 20:16:39,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-15 20:16:39,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-15 20:16:39,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-10-15 20:16:40,158 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-10-15 20:16:40,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-10-15 20:16:40,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-10-15 20:16:40,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-10-15 20:16:40,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_518efe89-15ea-4354-afbf-b48b324fb0c5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...