./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_5-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_5-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 02dc726982da9e300f34803a4bdbb3c0165037d3f4471bd0e009c42cfb19ed24 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-29 00:00:42,205 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 00:00:42,208 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 00:00:42,289 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 00:00:42,290 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 00:00:42,296 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 00:00:42,298 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 00:00:42,303 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 00:00:42,307 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 00:00:42,314 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 00:00:42,316 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 00:00:42,319 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 00:00:42,319 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 00:00:42,323 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 00:00:42,326 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 00:00:42,332 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 00:00:42,335 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 00:00:42,336 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 00:00:42,340 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 00:00:42,350 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 00:00:42,352 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 00:00:42,354 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 00:00:42,358 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 00:00:42,360 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 00:00:42,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 00:00:42,372 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 00:00:42,373 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 00:00:42,376 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 00:00:42,377 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 00:00:42,379 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 00:00:42,380 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 00:00:42,381 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 00:00:42,384 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 00:00:42,386 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 00:00:42,388 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 00:00:42,389 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 00:00:42,390 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 00:00:42,390 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 00:00:42,391 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 00:00:42,392 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 00:00:42,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 00:00:42,395 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-10-29 00:00:42,457 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 00:00:42,457 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 00:00:42,458 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-29 00:00:42,459 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-29 00:00:42,462 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-29 00:00:42,462 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-29 00:00:42,463 INFO L138 SettingsManager]: * Use SBE=true [2021-10-29 00:00:42,463 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-10-29 00:00:42,464 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-10-29 00:00:42,464 INFO L138 SettingsManager]: * Use old map elimination=false [2021-10-29 00:00:42,466 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-10-29 00:00:42,466 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-10-29 00:00:42,467 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-10-29 00:00:42,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 00:00:42,468 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 00:00:42,468 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-29 00:00:42,468 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-29 00:00:42,469 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 00:00:42,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 00:00:42,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-10-29 00:00:42,470 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-10-29 00:00:42,470 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-10-29 00:00:42,470 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 00:00:42,471 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-29 00:00:42,471 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-10-29 00:00:42,471 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 00:00:42,474 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-10-29 00:00:42,474 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 00:00:42,475 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-29 00:00:42,475 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 00:00:42,475 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-29 00:00:42,476 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 00:00:42,477 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-10-29 00:00:42,478 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_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02dc726982da9e300f34803a4bdbb3c0165037d3f4471bd0e009c42cfb19ed24 [2021-10-29 00:00:42,884 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 00:00:42,932 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 00:00:42,936 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 00:00:42,937 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 00:00:42,940 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 00:00:42,942 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/recursive-simple/fibo_5-2.c [2021-10-29 00:00:43,045 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/data/dfe15cade/f4b6ab2fe32c4fb89e42730df6763558/FLAGc3652f662 [2021-10-29 00:00:43,728 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 00:00:43,729 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/sv-benchmarks/c/recursive-simple/fibo_5-2.c [2021-10-29 00:00:43,745 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/data/dfe15cade/f4b6ab2fe32c4fb89e42730df6763558/FLAGc3652f662 [2021-10-29 00:00:44,092 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/data/dfe15cade/f4b6ab2fe32c4fb89e42730df6763558 [2021-10-29 00:00:44,095 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 00:00:44,097 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 00:00:44,113 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 00:00:44,114 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 00:00:44,118 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 00:00:44,119 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 12:00:44" (1/1) ... [2021-10-29 00:00:44,121 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f5d3c92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:00:44, skipping insertion in model container [2021-10-29 00:00:44,121 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 12:00:44" (1/1) ... [2021-10-29 00:00:44,132 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 00:00:44,152 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 00:00:44,386 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_db36b1c2-6442-4d38-a097-d39f6fa65789/sv-benchmarks/c/recursive-simple/fibo_5-2.c[740,753] [2021-10-29 00:00:44,387 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 00:00:44,399 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 00:00:44,415 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_db36b1c2-6442-4d38-a097-d39f6fa65789/sv-benchmarks/c/recursive-simple/fibo_5-2.c[740,753] [2021-10-29 00:00:44,416 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 00:00:44,433 INFO L208 MainTranslator]: Completed translation [2021-10-29 00:00:44,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:00:44 WrapperNode [2021-10-29 00:00:44,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 00:00:44,435 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 00:00:44,435 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 00:00:44,435 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 00:00:44,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:00:44" (1/1) ... [2021-10-29 00:00:44,452 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:00:44" (1/1) ... [2021-10-29 00:00:44,474 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 00:00:44,475 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 00:00:44,476 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 00:00:44,476 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 00:00:44,490 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:00:44" (1/1) ... [2021-10-29 00:00:44,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:00:44" (1/1) ... [2021-10-29 00:00:44,491 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:00:44" (1/1) ... [2021-10-29 00:00:44,492 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:00:44" (1/1) ... [2021-10-29 00:00:44,495 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:00:44" (1/1) ... [2021-10-29 00:00:44,498 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:00:44" (1/1) ... [2021-10-29 00:00:44,499 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:00:44" (1/1) ... [2021-10-29 00:00:44,501 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 00:00:44,502 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 00:00:44,503 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 00:00:44,503 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 00:00:44,504 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:00:44" (1/1) ... [2021-10-29 00:00:44,514 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:00:44,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:00:44,547 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:00:44,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-10-29 00:00:44,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 00:00:44,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 00:00:44,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-29 00:00:44,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 00:00:44,609 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2021-10-29 00:00:44,610 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2021-10-29 00:00:44,823 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 00:00:44,823 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-29 00:00:44,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 12:00:44 BoogieIcfgContainer [2021-10-29 00:00:44,826 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 00:00:44,827 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-10-29 00:00:44,827 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-10-29 00:00:44,848 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-10-29 00:00:44,849 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-29 00:00:44,849 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 29.10 12:00:44" (1/3) ... [2021-10-29 00:00:44,850 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@b77eb2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.10 12:00:44, skipping insertion in model container [2021-10-29 00:00:44,851 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-29 00:00:44,851 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:00:44" (2/3) ... [2021-10-29 00:00:44,851 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@b77eb2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.10 12:00:44, skipping insertion in model container [2021-10-29 00:00:44,852 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-29 00:00:44,852 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 12:00:44" (3/3) ... [2021-10-29 00:00:44,853 INFO L389 chiAutomizerObserver]: Analyzing ICFG fibo_5-2.c [2021-10-29 00:00:44,931 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-10-29 00:00:44,932 INFO L360 BuchiCegarLoop]: Hoare is false [2021-10-29 00:00:44,932 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-10-29 00:00:44,932 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-29 00:00:44,932 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-29 00:00:44,932 INFO L364 BuchiCegarLoop]: Difference is false [2021-10-29 00:00:44,932 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-29 00:00:44,933 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-10-29 00:00:44,962 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) [2021-10-29 00:00:45,005 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-29 00:00:45,006 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-29 00:00:45,006 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-29 00:00:45,016 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-10-29 00:00:45,016 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-29 00:00:45,016 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-10-29 00:00:45,017 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) [2021-10-29 00:00:45,023 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-29 00:00:45,023 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-29 00:00:45,024 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-29 00:00:45,025 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-10-29 00:00:45,025 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-29 00:00:45,037 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 [2021-10-29 00:00:45,038 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 [2021-10-29 00:00:45,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:00:45,055 INFO L85 PathProgramCache]: Analyzing trace with hash 29883, now seen corresponding path program 1 times [2021-10-29 00:00:45,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:00:45,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406088924] [2021-10-29 00:00:45,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:00:45,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:00:45,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 00:00:45,215 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 00:00:45,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 00:00:45,316 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-29 00:00:45,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:00:45,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1450956, now seen corresponding path program 1 times [2021-10-29 00:00:45,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:00:45,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656255510] [2021-10-29 00:00:45,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:00:45,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:00:45,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 00:00:45,341 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 00:00:45,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 00:00:45,349 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-29 00:00:45,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:00:45,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1828301702, now seen corresponding path program 1 times [2021-10-29 00:00:45,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:00:45,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210610228] [2021-10-29 00:00:45,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:00:45,358 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:00:45,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 00:00:45,411 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 00:00:45,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 00:00:45,438 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-29 00:00:45,671 INFO L210 LassoAnalysis]: Preferences: [2021-10-29 00:00:45,671 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-29 00:00:45,672 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-29 00:00:45,672 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-29 00:00:45,672 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-29 00:00:45,672 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:00:45,673 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-29 00:00:45,673 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-29 00:00:45,673 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration1_Loop [2021-10-29 00:00:45,673 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-29 00:00:45,674 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-29 00:00:45,694 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:00:45,710 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:00:45,727 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:00:45,732 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:00:45,736 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:00:45,856 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-29 00:00:45,857 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-29 00:00:45,860 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:00:45,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:00:45,863 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:00:45,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-10-29 00:00:45,871 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-29 00:00:45,871 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-29 00:00:45,901 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-29 00:00:45,901 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-29 00:00:45,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-10-29 00:00:45,953 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:00:45,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:00:45,955 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:00:45,966 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-29 00:00:45,966 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-29 00:00:45,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-10-29 00:00:45,983 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-29 00:00:45,983 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-29 00:00:46,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-10-29 00:00:46,016 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:00:46,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:00:46,017 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:00:46,024 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-29 00:00:46,025 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-29 00:00:46,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-10-29 00:00:46,054 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-29 00:00:46,055 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-29 00:00:46,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-10-29 00:00:46,084 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:00:46,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:00:46,085 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:00:46,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-10-29 00:00:46,091 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-29 00:00:46,091 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-29 00:00:46,114 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-29 00:00:46,114 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-29 00:00:46,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-10-29 00:00:46,143 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:00:46,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:00:46,145 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:00:46,162 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-29 00:00:46,162 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-29 00:00:46,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-10-29 00:00:46,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-10-29 00:00:46,233 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:00:46,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:00:46,235 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:00:46,244 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-29 00:00:46,244 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-29 00:00:46,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-10-29 00:00:46,362 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-29 00:00:46,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-10-29 00:00:46,365 INFO L210 LassoAnalysis]: Preferences: [2021-10-29 00:00:46,365 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-29 00:00:46,365 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-29 00:00:46,366 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-29 00:00:46,366 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-29 00:00:46,366 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:00:46,366 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-29 00:00:46,366 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-29 00:00:46,366 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration1_Loop [2021-10-29 00:00:46,366 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-29 00:00:46,366 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-29 00:00:46,368 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:00:46,378 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:00:46,382 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:00:46,386 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:00:46,392 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:00:46,485 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-29 00:00:46,494 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-29 00:00:46,496 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:00:46,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:00:46,497 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:00:46,510 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 [2021-10-29 00:00:46,523 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-29 00:00:46,523 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-29 00:00:46,523 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-29 00:00:46,524 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-29 00:00:46,524 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-29 00:00:46,526 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-29 00:00:46,527 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-29 00:00:46,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-10-29 00:00:46,545 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-29 00:00:46,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-10-29 00:00:46,592 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:00:46,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:00:46,594 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:00:46,601 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 [2021-10-29 00:00:46,613 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-29 00:00:46,613 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-29 00:00:46,613 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-29 00:00:46,613 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-29 00:00:46,614 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-29 00:00:46,616 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-29 00:00:46,616 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-29 00:00:46,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-10-29 00:00:46,631 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-29 00:00:46,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-10-29 00:00:46,677 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:00:46,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:00:46,682 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:00:46,690 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 [2021-10-29 00:00:46,701 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-29 00:00:46,702 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-29 00:00:46,702 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-29 00:00:46,702 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-29 00:00:46,702 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-29 00:00:46,704 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-29 00:00:46,704 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-29 00:00:46,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-10-29 00:00:46,717 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-29 00:00:46,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-10-29 00:00:46,743 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:00:46,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:00:46,745 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:00:46,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-10-29 00:00:46,766 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 [2021-10-29 00:00:46,777 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-29 00:00:46,777 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-29 00:00:46,778 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-29 00:00:46,778 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-29 00:00:46,778 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-29 00:00:46,779 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-29 00:00:46,779 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-29 00:00:46,797 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-29 00:00:46,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-10-29 00:00:46,844 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:00:46,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:00:46,845 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:00:46,855 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 [2021-10-29 00:00:46,867 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-29 00:00:46,867 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-29 00:00:46,867 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-29 00:00:46,867 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-29 00:00:46,867 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-29 00:00:46,869 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-29 00:00:46,869 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-29 00:00:46,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-10-29 00:00:46,893 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-29 00:00:46,899 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-29 00:00:46,899 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-29 00:00:46,901 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:00:46,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:00:46,905 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:00:46,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-10-29 00:00:46,911 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-29 00:00:46,911 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-29 00:00:46,911 INFO L513 LassoAnalysis]: Proved termination. [2021-10-29 00:00:46,912 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2021-10-29 00:00:46,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-10-29 00:00:46,954 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-29 00:00:46,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:00:47,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:47,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-29 00:00:47,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:00:47,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:47,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-29 00:00:47,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:00:47,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:00:47,154 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 [2021-10-29 00:00:47,155 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) [2021-10-29 00:00:47,290 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. [2021-10-29 00:00:47,291 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 [2021-10-29 00:00:47,293 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) [2021-10-29 00:00:47,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2021-10-29 00:00:47,296 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2021-10-29 00:00:47,298 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-29 00:00:47,298 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2021-10-29 00:00:47,298 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-29 00:00:47,298 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2021-10-29 00:00:47,299 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-29 00:00:47,300 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 48 states and 60 transitions. [2021-10-29 00:00:47,305 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-29 00:00:47,313 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 48 states to 25 states and 34 transitions. [2021-10-29 00:00:47,314 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2021-10-29 00:00:47,315 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2021-10-29 00:00:47,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2021-10-29 00:00:47,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-29 00:00:47,316 INFO L681 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-10-29 00:00:47,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2021-10-29 00:00:47,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2021-10-29 00:00:47,350 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) [2021-10-29 00:00:47,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2021-10-29 00:00:47,353 INFO L704 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-10-29 00:00:47,353 INFO L587 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-10-29 00:00:47,353 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-10-29 00:00:47,353 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2021-10-29 00:00:47,355 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-29 00:00:47,355 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-29 00:00:47,355 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-29 00:00:47,356 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:00:47,356 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:00:47,357 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 [2021-10-29 00:00:47,357 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 [2021-10-29 00:00:47,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:00:47,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1181449843, now seen corresponding path program 1 times [2021-10-29 00:00:47,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:00:47,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623602794] [2021-10-29 00:00:47,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:00:47,359 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:00:47,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:47,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-10-29 00:00:47,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-29 00:00:47,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:47,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-29 00:00:47,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:00:47,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623602794] [2021-10-29 00:00:47,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623602794] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 00:00:47,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 00:00:47,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-29 00:00:47,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120883084] [2021-10-29 00:00:47,564 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-29 00:00:47,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:00:47,565 INFO L85 PathProgramCache]: Analyzing trace with hash 246097683, now seen corresponding path program 1 times [2021-10-29 00:00:47,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:00:47,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619747822] [2021-10-29 00:00:47,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:00:47,567 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:00:47,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:47,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-10-29 00:00:47,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:47,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-29 00:00:47,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:00:47,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619747822] [2021-10-29 00:00:47,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619747822] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 00:00:47,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 00:00:47,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-29 00:00:47,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159730415] [2021-10-29 00:00:47,672 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-29 00:00:47,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:00:47,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-29 00:00:47,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-29 00:00:47,677 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) [2021-10-29 00:00:47,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:00:47,789 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-10-29 00:00:47,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-29 00:00:47,790 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2021-10-29 00:00:47,798 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-29 00:00:47,806 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2021-10-29 00:00:47,806 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2021-10-29 00:00:47,808 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2021-10-29 00:00:47,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2021-10-29 00:00:47,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-29 00:00:47,808 INFO L681 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-10-29 00:00:47,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2021-10-29 00:00:47,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-29 00:00:47,815 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) [2021-10-29 00:00:47,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-10-29 00:00:47,818 INFO L704 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-10-29 00:00:47,818 INFO L587 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-10-29 00:00:47,818 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-10-29 00:00:47,818 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2021-10-29 00:00:47,822 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-29 00:00:47,822 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-29 00:00:47,822 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-29 00:00:47,823 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:00:47,823 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-10-29 00:00:47,823 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 [2021-10-29 00:00:47,824 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 [2021-10-29 00:00:47,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:00:47,824 INFO L85 PathProgramCache]: Analyzing trace with hash 2029785426, now seen corresponding path program 1 times [2021-10-29 00:00:47,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:00:47,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774240554] [2021-10-29 00:00:47,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:00:47,827 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:00:47,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:47,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-29 00:00:47,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:47,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:00:47,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:00:47,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774240554] [2021-10-29 00:00:47,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774240554] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:00:47,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853262021] [2021-10-29 00:00:47,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:00:47,971 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:00:47,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:00:47,977 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:00:47,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-29 00:00:48,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:48,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-29 00:00:48,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:00:48,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:00:48,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853262021] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:00:48,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:00:48,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-29 00:00:48,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837176743] [2021-10-29 00:00:48,172 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-29 00:00:48,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:00:48,175 INFO L85 PathProgramCache]: Analyzing trace with hash -960881524, now seen corresponding path program 1 times [2021-10-29 00:00:48,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:00:48,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844864814] [2021-10-29 00:00:48,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:00:48,176 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:00:48,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 00:00:48,182 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 00:00:48,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 00:00:48,189 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-29 00:00:48,365 INFO L210 LassoAnalysis]: Preferences: [2021-10-29 00:00:48,365 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-29 00:00:48,365 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-29 00:00:48,366 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-29 00:00:48,366 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-29 00:00:48,366 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:00:48,366 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-29 00:00:48,366 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-29 00:00:48,366 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration3_Loop [2021-10-29 00:00:48,366 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-29 00:00:48,366 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-29 00:00:48,369 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:00:48,373 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:00:48,383 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:00:48,387 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:00:48,457 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-29 00:00:48,458 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-29 00:00:48,458 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:00:48,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:00:48,461 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:00:48,494 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-29 00:00:48,494 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-29 00:00:48,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-10-29 00:00:48,517 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-29 00:00:48,517 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-29 00:00:48,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-10-29 00:00:48,565 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:00:48,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:00:48,566 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:00:48,572 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-29 00:00:48,572 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-29 00:00:48,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-10-29 00:00:48,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-10-29 00:00:48,645 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:00:48,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:00:48,646 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:00:48,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-10-29 00:00:48,653 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-29 00:00:48,654 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-29 00:00:50,042 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-29 00:00:50,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Ended with exit code 0 [2021-10-29 00:00:50,047 INFO L210 LassoAnalysis]: Preferences: [2021-10-29 00:00:50,048 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-29 00:00:50,048 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-29 00:00:50,048 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-29 00:00:50,048 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-29 00:00:50,048 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:00:50,048 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-29 00:00:50,048 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-29 00:00:50,048 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration3_Loop [2021-10-29 00:00:50,048 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-29 00:00:50,048 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-29 00:00:50,049 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:00:50,062 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:00:50,071 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:00:50,074 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:00:50,122 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-29 00:00:50,123 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-29 00:00:50,124 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:00:50,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:00:50,125 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:00:50,140 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 [2021-10-29 00:00:50,152 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-29 00:00:50,152 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-29 00:00:50,152 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-29 00:00:50,152 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-29 00:00:50,152 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-29 00:00:50,153 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-29 00:00:50,153 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-29 00:00:50,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-10-29 00:00:50,173 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-29 00:00:50,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-10-29 00:00:50,215 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:00:50,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:00:50,218 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:00:50,221 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 [2021-10-29 00:00:50,233 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-29 00:00:50,234 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-29 00:00:50,234 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-29 00:00:50,234 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-29 00:00:50,234 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-29 00:00:50,237 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-29 00:00:50,237 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-29 00:00:50,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-10-29 00:00:50,247 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-29 00:00:50,259 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-29 00:00:50,259 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-29 00:00:50,260 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:00:50,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:00:50,262 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:00:50,274 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-29 00:00:50,274 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-29 00:00:50,275 INFO L513 LassoAnalysis]: Proved termination. [2021-10-29 00:00:50,275 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2021-10-29 00:00:50,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-10-29 00:00:50,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-10-29 00:00:50,323 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-29 00:00:50,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:00:50,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:50,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-29 00:00:50,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:00:50,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:50,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-29 00:00:50,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:00:50,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2021-10-29 00:00:50,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:00:50,810 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 [2021-10-29 00:00:50,811 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) [2021-10-29 00:00:51,068 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. [2021-10-29 00:00:51,069 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 [2021-10-29 00:00:51,070 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) [2021-10-29 00:00:51,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2021-10-29 00:00:51,071 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 10 letters. [2021-10-29 00:00:51,072 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-29 00:00:51,072 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 22 letters. Loop has 10 letters. [2021-10-29 00:00:51,073 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-29 00:00:51,073 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 20 letters. [2021-10-29 00:00:51,074 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-29 00:00:51,074 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 183 transitions. [2021-10-29 00:00:51,082 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-10-29 00:00:51,089 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 108 states and 152 transitions. [2021-10-29 00:00:51,089 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 64 [2021-10-29 00:00:51,090 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2021-10-29 00:00:51,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 152 transitions. [2021-10-29 00:00:51,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-29 00:00:51,091 INFO L681 BuchiCegarLoop]: Abstraction has 108 states and 152 transitions. [2021-10-29 00:00:51,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states and 152 transitions. [2021-10-29 00:00:51,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2021-10-29 00:00:51,108 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) [2021-10-29 00:00:51,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2021-10-29 00:00:51,112 INFO L704 BuchiCegarLoop]: Abstraction has 94 states and 126 transitions. [2021-10-29 00:00:51,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:00:51,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-29 00:00:51,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-29 00:00:51,113 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) [2021-10-29 00:00:51,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:00:51,223 INFO L93 Difference]: Finished difference Result 109 states and 147 transitions. [2021-10-29 00:00:51,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-29 00:00:51,224 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 109 states and 147 transitions. [2021-10-29 00:00:51,239 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-10-29 00:00:51,247 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 109 states to 106 states and 144 transitions. [2021-10-29 00:00:51,248 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 69 [2021-10-29 00:00:51,248 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2021-10-29 00:00:51,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 144 transitions. [2021-10-29 00:00:51,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-29 00:00:51,249 INFO L681 BuchiCegarLoop]: Abstraction has 106 states and 144 transitions. [2021-10-29 00:00:51,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states and 144 transitions. [2021-10-29 00:00:51,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2021-10-29 00:00:51,263 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) [2021-10-29 00:00:51,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 125 transitions. [2021-10-29 00:00:51,266 INFO L704 BuchiCegarLoop]: Abstraction has 94 states and 125 transitions. [2021-10-29 00:00:51,266 INFO L587 BuchiCegarLoop]: Abstraction has 94 states and 125 transitions. [2021-10-29 00:00:51,266 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-10-29 00:00:51,266 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 94 states and 125 transitions. [2021-10-29 00:00:51,268 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-10-29 00:00:51,269 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-29 00:00:51,269 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-29 00:00:51,271 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:00:51,271 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2021-10-29 00:00:51,272 INFO L791 eck$LassoCheckResult]: Stem: 736#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 737#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 743#L27 call main_#t~ret9 := fibo(main_~x~0);< 754#fiboENTRY ~n := #in~n; 798#L8 assume !(~n < 1); 778#L10 assume !(1 == ~n); 742#L13 call #t~ret7 := fibo(~n - 1);< 744#fiboENTRY ~n := #in~n; 759#L8 assume !(~n < 1); 775#L10 assume !(1 == ~n); 758#L13 call #t~ret7 := fibo(~n - 1);< 744#fiboENTRY ~n := #in~n; 759#L8 assume !(~n < 1); 775#L10 assume !(1 == ~n); 758#L13 call #t~ret7 := fibo(~n - 1);< 744#fiboENTRY ~n := #in~n; 760#L8 assume !(~n < 1); 797#L10 assume 1 == ~n;#res := 1; 796#fiboFINAL assume true; 795#fiboEXIT >#33#return; 756#L13-1 call #t~ret8 := fibo(~n - 2);< 755#fiboENTRY ~n := #in~n; 757#L8 assume ~n < 1;#res := 0; 774#fiboFINAL assume true; 825#fiboEXIT >#35#return; 821#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 819#fiboFINAL assume true; 817#fiboEXIT >#33#return; 739#L13-1 [2021-10-29 00:00:51,272 INFO L793 eck$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 [2021-10-29 00:00:51,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:00:51,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1557778097, now seen corresponding path program 1 times [2021-10-29 00:00:51,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:00:51,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907278488] [2021-10-29 00:00:51,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:00:51,274 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:00:51,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:51,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-29 00:00:51,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:51,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-29 00:00:51,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:51,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-29 00:00:51,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:51,417 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-29 00:00:51,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:00:51,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907278488] [2021-10-29 00:00:51,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907278488] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:00:51,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693334319] [2021-10-29 00:00:51,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:00:51,419 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:00:51,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:00:51,420 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:00:51,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-29 00:00:51,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:51,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-29 00:00:51,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:00:51,641 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-29 00:00:51,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693334319] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:00:51,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:00:51,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-10-29 00:00:51,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627632184] [2021-10-29 00:00:51,643 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-29 00:00:51,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:00:51,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1616897917, now seen corresponding path program 1 times [2021-10-29 00:00:51,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:00:51,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267474631] [2021-10-29 00:00:51,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:00:51,644 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:00:51,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:51,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-10-29 00:00:51,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:51,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-29 00:00:51,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:51,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-29 00:00:51,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:51,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-29 00:00:51,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:51,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-29 00:00:51,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:51,792 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 26 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-29 00:00:51,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:00:51,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267474631] [2021-10-29 00:00:51,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267474631] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:00:51,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380922498] [2021-10-29 00:00:51,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:00:51,794 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:00:51,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:00:51,795 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:00:51,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-29 00:00:51,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:51,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-29 00:00:51,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:00:52,056 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-29 00:00:52,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380922498] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:00:52,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:00:52,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-10-29 00:00:52,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850741391] [2021-10-29 00:00:52,059 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-29 00:00:52,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:00:52,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-29 00:00:52,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-29 00:00:52,061 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) [2021-10-29 00:00:52,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:00:52,304 INFO L93 Difference]: Finished difference Result 116 states and 159 transitions. [2021-10-29 00:00:52,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-29 00:00:52,306 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 116 states and 159 transitions. [2021-10-29 00:00:52,310 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2021-10-29 00:00:52,314 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 116 states to 114 states and 157 transitions. [2021-10-29 00:00:52,314 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2021-10-29 00:00:52,315 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2021-10-29 00:00:52,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 114 states and 157 transitions. [2021-10-29 00:00:52,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-29 00:00:52,315 INFO L681 BuchiCegarLoop]: Abstraction has 114 states and 157 transitions. [2021-10-29 00:00:52,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states and 157 transitions. [2021-10-29 00:00:52,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-10-29 00:00:52,329 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) [2021-10-29 00:00:52,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 157 transitions. [2021-10-29 00:00:52,332 INFO L704 BuchiCegarLoop]: Abstraction has 114 states and 157 transitions. [2021-10-29 00:00:52,332 INFO L587 BuchiCegarLoop]: Abstraction has 114 states and 157 transitions. [2021-10-29 00:00:52,332 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-10-29 00:00:52,332 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 114 states and 157 transitions. [2021-10-29 00:00:52,335 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2021-10-29 00:00:52,335 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-29 00:00:52,335 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-29 00:00:52,338 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:00:52,338 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [8, 7, 6, 4, 4, 4, 4, 3, 3, 2, 2] [2021-10-29 00:00:52,338 INFO L791 eck$LassoCheckResult]: Stem: 1247#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 1248#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 1265#L27 call main_#t~ret9 := fibo(main_~x~0);< 1266#fiboENTRY ~n := #in~n; 1312#L8 assume !(~n < 1); 1311#L10 assume !(1 == ~n); 1254#L13 call #t~ret7 := fibo(~n - 1);< 1273#fiboENTRY ~n := #in~n; 1274#L8 assume !(~n < 1); 1284#L10 assume !(1 == ~n); 1253#L13 call #t~ret7 := fibo(~n - 1);< 1255#fiboENTRY ~n := #in~n; 1309#L8 assume !(~n < 1); 1307#L10 assume !(1 == ~n); 1257#L13 call #t~ret7 := fibo(~n - 1);< 1255#fiboENTRY ~n := #in~n; 1309#L8 assume !(~n < 1); 1307#L10 assume !(1 == ~n); 1257#L13 call #t~ret7 := fibo(~n - 1);< 1255#fiboENTRY ~n := #in~n; 1310#L8 assume !(~n < 1); 1308#L10 assume 1 == ~n;#res := 1; 1306#fiboFINAL assume true; 1305#fiboEXIT >#33#return; 1280#L13-1 call #t~ret8 := fibo(~n - 2);< 1304#fiboENTRY ~n := #in~n; 1282#L8 assume ~n < 1;#res := 0; 1283#fiboFINAL assume true; 1279#fiboEXIT >#35#return; 1256#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1258#fiboFINAL assume true; 1275#fiboEXIT >#33#return; 1269#L13-1 [2021-10-29 00:00:52,339 INFO L793 eck$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 [2021-10-29 00:00:52,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:00:52,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1730264506, now seen corresponding path program 2 times [2021-10-29 00:00:52,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:00:52,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367601494] [2021-10-29 00:00:52,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:00:52,340 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:00:52,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 00:00:52,366 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 00:00:52,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 00:00:52,400 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-29 00:00:52,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:00:52,402 INFO L85 PathProgramCache]: Analyzing trace with hash 564146419, now seen corresponding path program 2 times [2021-10-29 00:00:52,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:00:52,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476020539] [2021-10-29 00:00:52,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:00:52,403 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:00:52,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:52,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-10-29 00:00:52,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:52,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-29 00:00:52,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:52,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-29 00:00:52,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:52,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-29 00:00:52,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:52,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-10-29 00:00:52,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:52,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-29 00:00:52,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:52,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-29 00:00:52,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:52,611 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 45 proven. 31 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-10-29 00:00:52,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:00:52,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476020539] [2021-10-29 00:00:52,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476020539] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:00:52,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098818422] [2021-10-29 00:00:52,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-29 00:00:52,613 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:00:52,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:00:52,615 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:00:52,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-29 00:00:52,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-29 00:00:52,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 00:00:52,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-29 00:00:52,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:00:52,951 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 38 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-10-29 00:00:52,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098818422] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:00:52,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:00:52,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-10-29 00:00:52,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75864739] [2021-10-29 00:00:52,958 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-29 00:00:52,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:00:52,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-29 00:00:52,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-10-29 00:00:52,961 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) [2021-10-29 00:00:53,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:00:53,149 INFO L93 Difference]: Finished difference Result 65 states and 84 transitions. [2021-10-29 00:00:53,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-29 00:00:53,150 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 65 states and 84 transitions. [2021-10-29 00:00:53,152 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-10-29 00:00:53,171 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 65 states to 59 states and 77 transitions. [2021-10-29 00:00:53,172 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 48 [2021-10-29 00:00:53,172 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 48 [2021-10-29 00:00:53,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 77 transitions. [2021-10-29 00:00:53,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-29 00:00:53,173 INFO L681 BuchiCegarLoop]: Abstraction has 59 states and 77 transitions. [2021-10-29 00:00:53,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states and 77 transitions. [2021-10-29 00:00:53,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2021-10-29 00:00:53,179 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) [2021-10-29 00:00:53,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2021-10-29 00:00:53,181 INFO L704 BuchiCegarLoop]: Abstraction has 56 states and 70 transitions. [2021-10-29 00:00:53,181 INFO L587 BuchiCegarLoop]: Abstraction has 56 states and 70 transitions. [2021-10-29 00:00:53,181 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-10-29 00:00:53,181 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 56 states and 70 transitions. [2021-10-29 00:00:53,182 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-10-29 00:00:53,183 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-29 00:00:53,183 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-29 00:00:53,186 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [8, 6, 5, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-10-29 00:00:53,186 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1] [2021-10-29 00:00:53,186 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 [2021-10-29 00:00:53,187 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 [2021-10-29 00:00:53,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:00:53,187 INFO L85 PathProgramCache]: Analyzing trace with hash -2124338928, now seen corresponding path program 3 times [2021-10-29 00:00:53,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:00:53,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812746290] [2021-10-29 00:00:53,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:00:53,188 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:00:53,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:53,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-29 00:00:53,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:53,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-29 00:00:53,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:53,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-29 00:00:53,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:53,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-29 00:00:53,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:53,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-10-29 00:00:53,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:53,399 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 35 proven. 51 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-29 00:00:53,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:00:53,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812746290] [2021-10-29 00:00:53,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812746290] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:00:53,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271542368] [2021-10-29 00:00:53,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-29 00:00:53,401 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:00:53,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:00:53,405 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:00:53,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-29 00:00:53,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-29 00:00:53,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 00:00:53,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-29 00:00:53,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:00:53,761 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-10-29 00:00:53,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271542368] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:00:53,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:00:53,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 18 [2021-10-29 00:00:53,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178767186] [2021-10-29 00:00:53,766 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-29 00:00:53,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:00:53,767 INFO L85 PathProgramCache]: Analyzing trace with hash -176759904, now seen corresponding path program 3 times [2021-10-29 00:00:53,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:00:53,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012906084] [2021-10-29 00:00:53,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:00:53,767 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:00:53,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:53,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-10-29 00:00:53,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:53,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-29 00:00:53,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:53,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-29 00:00:53,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:53,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-29 00:00:53,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:53,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-10-29 00:00:53,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:53,903 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-29 00:00:53,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:00:53,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012906084] [2021-10-29 00:00:53,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012906084] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:00:53,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883188970] [2021-10-29 00:00:53,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-29 00:00:53,905 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:00:53,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:00:53,910 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:00:53,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-29 00:00:54,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-29 00:00:54,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 00:00:54,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-29 00:00:54,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:00:54,235 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-29 00:00:54,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883188970] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:00:54,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:00:54,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-10-29 00:00:54,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039026033] [2021-10-29 00:00:54,237 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-29 00:00:54,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:00:54,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-29 00:00:54,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-10-29 00:00:54,239 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) [2021-10-29 00:00:54,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:00:54,365 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2021-10-29 00:00:54,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-29 00:00:54,366 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 56 states and 66 transitions. [2021-10-29 00:00:54,369 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-10-29 00:00:54,372 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 56 states to 56 states and 66 transitions. [2021-10-29 00:00:54,372 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 45 [2021-10-29 00:00:54,372 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 45 [2021-10-29 00:00:54,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 66 transitions. [2021-10-29 00:00:54,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-29 00:00:54,373 INFO L681 BuchiCegarLoop]: Abstraction has 56 states and 66 transitions. [2021-10-29 00:00:54,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states and 66 transitions. [2021-10-29 00:00:54,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2021-10-29 00:00:54,387 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) [2021-10-29 00:00:54,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-10-29 00:00:54,392 INFO L704 BuchiCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-10-29 00:00:54,392 INFO L587 BuchiCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-10-29 00:00:54,392 INFO L425 BuchiCegarLoop]: ======== Iteration 7============ [2021-10-29 00:00:54,393 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 54 states and 64 transitions. [2021-10-29 00:00:54,393 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-29 00:00:54,394 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-29 00:00:54,394 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-29 00:00:54,403 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [8, 7, 5, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-10-29 00:00:54,403 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2021-10-29 00:00:54,403 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 [2021-10-29 00:00:54,404 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 [2021-10-29 00:00:54,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:00:54,404 INFO L85 PathProgramCache]: Analyzing trace with hash -690973043, now seen corresponding path program 4 times [2021-10-29 00:00:54,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:00:54,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538291519] [2021-10-29 00:00:54,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:00:54,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:00:54,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:54,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-29 00:00:54,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:54,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-29 00:00:54,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:54,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-29 00:00:54,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:54,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-29 00:00:54,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:54,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-10-29 00:00:54,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:54,658 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 28 proven. 60 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-29 00:00:54,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:00:54,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538291519] [2021-10-29 00:00:54,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538291519] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:00:54,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110944815] [2021-10-29 00:00:54,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-29 00:00:54,660 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:00:54,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:00:54,665 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:00:54,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-29 00:00:54,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-29 00:00:54,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 00:00:54,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-29 00:00:54,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:00:55,058 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 26 proven. 65 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-29 00:00:55,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110944815] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:00:55,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:00:55,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 16 [2021-10-29 00:00:55,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488890006] [2021-10-29 00:00:55,060 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-29 00:00:55,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:00:55,061 INFO L85 PathProgramCache]: Analyzing trace with hash -445565443, now seen corresponding path program 4 times [2021-10-29 00:00:55,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:00:55,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763088159] [2021-10-29 00:00:55,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:00:55,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:00:55,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 00:00:55,070 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 00:00:55,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 00:00:55,078 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-29 00:00:55,648 INFO L210 LassoAnalysis]: Preferences: [2021-10-29 00:00:55,649 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-29 00:00:55,649 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-29 00:00:55,649 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-29 00:00:55,649 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-29 00:00:55,649 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:00:55,649 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-29 00:00:55,649 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-29 00:00:55,649 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration7_Loop [2021-10-29 00:00:55,649 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-29 00:00:55,649 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-29 00:00:55,650 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:00:55,666 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:00:55,670 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:00:55,673 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:00:55,741 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-29 00:00:55,741 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-29 00:00:55,741 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:00:55,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:00:55,745 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:00:55,750 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-29 00:00:55,750 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-29 00:00:55,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-10-29 00:00:55,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2021-10-29 00:00:55,826 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:00:55,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:00:55,828 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:00:55,834 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-29 00:00:55,834 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-29 00:00:55,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-10-29 00:00:56,760 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-29 00:00:56,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2021-10-29 00:00:56,765 INFO L210 LassoAnalysis]: Preferences: [2021-10-29 00:00:56,765 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-29 00:00:56,765 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-29 00:00:56,765 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-29 00:00:56,765 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-29 00:00:56,765 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:00:56,765 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-29 00:00:56,765 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-29 00:00:56,765 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration7_Loop [2021-10-29 00:00:56,765 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-29 00:00:56,765 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-29 00:00:56,766 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:00:56,793 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:00:56,795 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:00:56,798 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:00:56,870 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-29 00:00:56,871 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-29 00:00:56,871 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:00:56,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:00:56,872 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:00:56,882 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-29 00:00:56,893 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-29 00:00:56,894 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-29 00:00:56,894 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-29 00:00:56,894 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-29 00:00:56,894 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-29 00:00:56,896 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-29 00:00:56,896 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-29 00:00:56,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2021-10-29 00:00:56,913 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-29 00:00:56,916 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-10-29 00:00:56,916 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-10-29 00:00:56,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:00:56,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:00:56,919 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:00:56,920 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-29 00:00:56,920 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-29 00:00:56,921 INFO L513 LassoAnalysis]: Proved termination. [2021-10-29 00:00:56,921 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2021-10-29 00:00:56,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2021-10-29 00:00:56,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2021-10-29 00:00:56,971 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-29 00:00:56,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:00:57,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:57,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-29 00:00:57,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:00:57,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2021-10-29 00:00:57,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:57,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-29 00:00:57,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:00:58,345 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 14 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-29 00:00:58,347 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 [2021-10-29 00:00:58,348 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) [2021-10-29 00:00:58,473 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. [2021-10-29 00:00:58,474 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 [2021-10-29 00:00:58,474 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) [2021-10-29 00:00:58,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 17 transitions. [2021-10-29 00:00:58,475 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 45 letters. Loop has 35 letters. [2021-10-29 00:00:58,476 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-29 00:00:58,477 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-29 00:00:58,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:00:58,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:58,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-29 00:00:58,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:00:59,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:59,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-29 00:00:59,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:00:59,695 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 14 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-29 00:00:59,696 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 [2021-10-29 00:00:59,697 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) [2021-10-29 00:00:59,811 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. [2021-10-29 00:00:59,817 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 [2021-10-29 00:00:59,817 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) [2021-10-29 00:00:59,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 17 transitions. [2021-10-29 00:00:59,818 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 45 letters. Loop has 35 letters. [2021-10-29 00:00:59,818 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-29 00:00:59,818 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-29 00:00:59,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:00:59,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:00:59,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-29 00:00:59,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:01:00,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:00,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-29 00:01:00,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:01:00,942 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 14 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-29 00:01:00,943 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 [2021-10-29 00:01:00,943 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) [2021-10-29 00:01:01,366 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. [2021-10-29 00:01:01,367 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 [2021-10-29 00:01:01,368 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) [2021-10-29 00:01:01,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 52 transitions. [2021-10-29 00:01:01,369 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 45 letters. Loop has 35 letters. [2021-10-29 00:01:01,371 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-29 00:01:01,371 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 80 letters. Loop has 35 letters. [2021-10-29 00:01:01,373 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-29 00:01:01,373 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 45 letters. Loop has 70 letters. [2021-10-29 00:01:01,376 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-29 00:01:01,377 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 353 states and 439 transitions. [2021-10-29 00:01:01,385 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-29 00:01:01,391 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 353 states to 221 states and 281 transitions. [2021-10-29 00:01:01,391 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 78 [2021-10-29 00:01:01,391 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 105 [2021-10-29 00:01:01,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 221 states and 281 transitions. [2021-10-29 00:01:01,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-29 00:01:01,393 INFO L681 BuchiCegarLoop]: Abstraction has 221 states and 281 transitions. [2021-10-29 00:01:01,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states and 281 transitions. [2021-10-29 00:01:01,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 213. [2021-10-29 00:01:01,408 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) [2021-10-29 00:01:01,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 259 transitions. [2021-10-29 00:01:01,411 INFO L704 BuchiCegarLoop]: Abstraction has 213 states and 259 transitions. [2021-10-29 00:01:01,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:01:01,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-29 00:01:01,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-10-29 00:01:01,413 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) [2021-10-29 00:01:01,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:01:01,775 INFO L93 Difference]: Finished difference Result 124 states and 131 transitions. [2021-10-29 00:01:01,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-29 00:01:01,776 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 124 states and 131 transitions. [2021-10-29 00:01:01,778 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-10-29 00:01:01,779 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 124 states to 63 states and 66 transitions. [2021-10-29 00:01:01,779 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 49 [2021-10-29 00:01:01,780 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 52 [2021-10-29 00:01:01,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 66 transitions. [2021-10-29 00:01:01,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-29 00:01:01,780 INFO L681 BuchiCegarLoop]: Abstraction has 63 states and 66 transitions. [2021-10-29 00:01:01,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states and 66 transitions. [2021-10-29 00:01:01,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2021-10-29 00:01:01,783 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) [2021-10-29 00:01:01,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2021-10-29 00:01:01,784 INFO L704 BuchiCegarLoop]: Abstraction has 62 states and 65 transitions. [2021-10-29 00:01:01,784 INFO L587 BuchiCegarLoop]: Abstraction has 62 states and 65 transitions. [2021-10-29 00:01:01,784 INFO L425 BuchiCegarLoop]: ======== Iteration 8============ [2021-10-29 00:01:01,784 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 62 states and 65 transitions. [2021-10-29 00:01:01,785 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-10-29 00:01:01,785 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-29 00:01:01,785 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-29 00:01:01,786 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [9, 8, 6, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2021-10-29 00:01:01,786 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-29 00:01:01,787 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 [2021-10-29 00:01:01,787 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 [2021-10-29 00:01:01,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:01:01,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1327795734, now seen corresponding path program 5 times [2021-10-29 00:01:01,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:01:01,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446072525] [2021-10-29 00:01:01,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:01,788 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:01:01,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:01,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-29 00:01:01,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:01,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-29 00:01:01,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:01,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-29 00:01:01,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:01,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-29 00:01:01,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:01,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-10-29 00:01:01,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:01,975 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 53 proven. 32 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-29 00:01:01,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:01:01,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446072525] [2021-10-29 00:01:01,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446072525] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:01:01,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781919377] [2021-10-29 00:01:01,976 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-29 00:01:01,977 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:01:01,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:01,978 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:01:01,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-29 00:01:02,416 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-10-29 00:01:02,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 00:01:02,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-29 00:01:02,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:01:02,653 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 58 proven. 35 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-10-29 00:01:02,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781919377] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:01:02,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:01:02,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 14 [2021-10-29 00:01:02,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133028143] [2021-10-29 00:01:02,655 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-29 00:01:02,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:01:02,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1893846, now seen corresponding path program 2 times [2021-10-29 00:01:02,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:01:02,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31210352] [2021-10-29 00:01:02,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:02,658 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:01:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 00:01:02,668 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 00:01:02,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 00:01:02,670 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-29 00:01:02,752 INFO L210 LassoAnalysis]: Preferences: [2021-10-29 00:01:02,753 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-29 00:01:02,753 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-29 00:01:02,753 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-29 00:01:02,753 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-29 00:01:02,754 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:01:02,754 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-29 00:01:02,754 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-29 00:01:02,754 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration8_Loop [2021-10-29 00:01:02,754 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-29 00:01:02,754 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-29 00:01:02,756 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:01:02,767 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:01:02,770 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:01:02,772 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:01:02,832 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-29 00:01:02,833 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-29 00:01:02,833 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:01:02,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:02,835 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:01:02,839 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-29 00:01:02,840 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-29 00:01:02,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2021-10-29 00:01:02,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:02,917 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:01:02,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:02,918 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:01:02,921 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-29 00:01:02,921 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-29 00:01:02,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2021-10-29 00:01:06,016 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-29 00:01:06,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:06,020 INFO L210 LassoAnalysis]: Preferences: [2021-10-29 00:01:06,020 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-29 00:01:06,020 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-29 00:01:06,020 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-29 00:01:06,020 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-29 00:01:06,020 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:01:06,020 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-29 00:01:06,020 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-29 00:01:06,021 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration8_Loop [2021-10-29 00:01:06,021 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-29 00:01:06,021 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-29 00:01:06,021 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:01:06,029 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:01:06,032 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:01:06,034 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:01:06,082 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-29 00:01:06,082 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-29 00:01:06,082 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:01:06,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:06,088 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:01:06,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2021-10-29 00:01:06,090 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 [2021-10-29 00:01:06,099 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-29 00:01:06,099 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-29 00:01:06,099 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-29 00:01:06,099 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-29 00:01:06,099 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-29 00:01:06,100 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-29 00:01:06,101 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-29 00:01:06,103 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-29 00:01:06,106 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-29 00:01:06,107 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-29 00:01:06,107 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:01:06,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:06,109 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:01:06,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2021-10-29 00:01:06,112 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-29 00:01:06,112 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-29 00:01:06,112 INFO L513 LassoAnalysis]: Proved termination. [2021-10-29 00:01:06,112 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2021-10-29 00:01:06,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:06,138 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-29 00:01:06,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:01:06,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:06,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-29 00:01:06,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:01:06,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:06,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:06,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-29 00:01:06,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:01:07,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:01:07,033 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 [2021-10-29 00:01:07,033 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) [2021-10-29 00:01:07,101 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. [2021-10-29 00:01:07,102 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 [2021-10-29 00:01:07,102 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) [2021-10-29 00:01:07,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2021-10-29 00:01:07,103 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 49 letters. Loop has 4 letters. [2021-10-29 00:01:07,103 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-29 00:01:07,103 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-29 00:01:07,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:01:07,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:07,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-29 00:01:07,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:01:08,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:08,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-29 00:01:08,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:01:08,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:01:08,081 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 [2021-10-29 00:01:08,081 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) [2021-10-29 00:01:08,191 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. [2021-10-29 00:01:08,192 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 [2021-10-29 00:01:08,192 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) [2021-10-29 00:01:08,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2021-10-29 00:01:08,193 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 49 letters. Loop has 4 letters. [2021-10-29 00:01:08,193 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-29 00:01:08,194 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-29 00:01:08,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:01:08,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:08,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-29 00:01:08,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:01:09,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:09,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-29 00:01:09,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:01:09,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:01:09,149 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 [2021-10-29 00:01:09,167 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) [2021-10-29 00:01:09,305 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. [2021-10-29 00:01:09,309 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 [2021-10-29 00:01:09,310 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) [2021-10-29 00:01:09,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2021-10-29 00:01:09,311 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 49 letters. Loop has 4 letters. [2021-10-29 00:01:09,311 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-29 00:01:09,311 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 53 letters. Loop has 4 letters. [2021-10-29 00:01:09,312 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-29 00:01:09,313 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 49 letters. Loop has 8 letters. [2021-10-29 00:01:09,315 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-29 00:01:09,315 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 86 states and 93 transitions. [2021-10-29 00:01:09,317 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-29 00:01:09,318 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 86 states to 0 states and 0 transitions. [2021-10-29 00:01:09,318 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-10-29 00:01:09,318 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-10-29 00:01:09,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-10-29 00:01:09,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-29 00:01:09,319 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-29 00:01:09,319 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-29 00:01:09,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:01:09,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-29 00:01:09,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-10-29 00:01:09,320 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) [2021-10-29 00:01:09,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:01:09,321 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2021-10-29 00:01:09,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-29 00:01:09,321 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2021-10-29 00:01:09,321 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-29 00:01:09,321 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2021-10-29 00:01:09,322 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-10-29 00:01:09,340 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-10-29 00:01:09,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-10-29 00:01:09,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-29 00:01:09,341 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-29 00:01:09,341 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-29 00:01:09,341 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-29 00:01:09,341 INFO L425 BuchiCegarLoop]: ======== Iteration 9============ [2021-10-29 00:01:09,341 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-10-29 00:01:09,341 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-29 00:01:09,342 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-10-29 00:01:09,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 29.10 12:01:09 BoogieIcfgContainer [2021-10-29 00:01:09,349 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-10-29 00:01:09,350 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 00:01:09,350 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 00:01:09,351 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 00:01:09,352 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 12:00:44" (3/4) ... [2021-10-29 00:01:09,356 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-29 00:01:09,361 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 00:01:09,363 INFO L168 Benchmark]: Toolchain (without parser) took 25264.86 ms. Allocated memory was 96.5 MB in the beginning and 176.2 MB in the end (delta: 79.7 MB). Free memory was 57.8 MB in the beginning and 111.1 MB in the end (delta: -53.3 MB). Peak memory consumption was 26.0 MB. Max. memory is 16.1 GB. [2021-10-29 00:01:09,368 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 96.5 MB. Free memory was 73.8 MB in the beginning and 73.8 MB in the end (delta: 55.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 00:01:09,368 INFO L168 Benchmark]: CACSL2BoogieTranslator took 320.58 ms. Allocated memory is still 96.5 MB. Free memory was 57.6 MB in the beginning and 68.5 MB in the end (delta: -11.0 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-29 00:01:09,369 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.86 ms. Allocated memory is still 96.5 MB. Free memory was 68.5 MB in the beginning and 67.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 00:01:09,369 INFO L168 Benchmark]: Boogie Preprocessor took 26.07 ms. Allocated memory is still 96.5 MB. Free memory was 67.2 MB in the beginning and 66.3 MB in the end (delta: 890.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 00:01:09,370 INFO L168 Benchmark]: RCFGBuilder took 323.53 ms. Allocated memory is still 96.5 MB. Free memory was 66.1 MB in the beginning and 57.2 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-29 00:01:09,377 INFO L168 Benchmark]: BuchiAutomizer took 24522.04 ms. Allocated memory was 96.5 MB in the beginning and 176.2 MB in the end (delta: 79.7 MB). Free memory was 57.0 MB in the beginning and 111.6 MB in the end (delta: -54.6 MB). Peak memory consumption was 26.5 MB. Max. memory is 16.1 GB. [2021-10-29 00:01:09,378 INFO L168 Benchmark]: Witness Printer took 11.78 ms. Allocated memory is still 176.2 MB. Free memory is still 111.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 00:01:09,381 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 96.5 MB. Free memory was 73.8 MB in the beginning and 73.8 MB in the end (delta: 55.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 320.58 ms. Allocated memory is still 96.5 MB. Free memory was 57.6 MB in the beginning and 68.5 MB in the end (delta: -11.0 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.86 ms. Allocated memory is still 96.5 MB. Free memory was 68.5 MB in the beginning and 67.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.07 ms. Allocated memory is still 96.5 MB. Free memory was 67.2 MB in the beginning and 66.3 MB in the end (delta: 890.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 323.53 ms. Allocated memory is still 96.5 MB. Free memory was 66.1 MB in the beginning and 57.2 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 24522.04 ms. Allocated memory was 96.5 MB in the beginning and 176.2 MB in the end (delta: 79.7 MB). Free memory was 57.0 MB in the beginning and 111.6 MB in the end (delta: -54.6 MB). Peak memory consumption was 26.5 MB. Max. memory is 16.1 GB. * Witness Printer took 11.78 ms. Allocated memory is still 176.2 MB. Free memory is still 111.1 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 24.4s and 9 iterations. TraceHistogramMax:9. Analysis of lassos took 14.1s. Construction of modules took 0.9s. Büchi inclusion checks took 8.8s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 9. Automata minimization 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 45 StatesRemovedByMinimization, 7 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had 114 states and ocurred in iteration 4. Nontrivial modules had stage [2, 0, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 32/70 HoareTripleCheckerStatistics: 178 SDtfs, 374 SDslu, 262 SDs, 0 SdLazy, 857 SolverSat, 256 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s 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: 50ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 5 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 6.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-10-29 00:01:09,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:09,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:09,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:10,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:10,244 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-10-29 00:01:10,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-10-29 00:01:10,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-10-29 00:01:10,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-10-29 00:01:11,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db36b1c2-6442-4d38-a097-d39f6fa65789/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...