./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_7-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_7-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt --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 c81a149fe338374de067d63dbdea0d00d3f8a8fa ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-12 23:59:02,263 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-12 23:59:02,267 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-12 23:59:02,327 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-12 23:59:02,329 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-12 23:59:02,334 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-12 23:59:02,336 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-12 23:59:02,339 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-12 23:59:02,341 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-12 23:59:02,342 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-12 23:59:02,344 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-12 23:59:02,345 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-12 23:59:02,346 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-12 23:59:02,347 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-12 23:59:02,349 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-12 23:59:02,351 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-12 23:59:02,352 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-12 23:59:02,353 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-12 23:59:02,356 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-12 23:59:02,358 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-12 23:59:02,360 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-12 23:59:02,362 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-12 23:59:02,364 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-12 23:59:02,365 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-12 23:59:02,369 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-12 23:59:02,369 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-12 23:59:02,370 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-12 23:59:02,371 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-12 23:59:02,371 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-12 23:59:02,373 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-12 23:59:02,373 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-12 23:59:02,374 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-12 23:59:02,375 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-12 23:59:02,376 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-12 23:59:02,378 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-12 23:59:02,378 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-12 23:59:02,379 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-12 23:59:02,380 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-12 23:59:02,380 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-12 23:59:02,381 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-12 23:59:02,382 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-12 23:59:02,385 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-10-12 23:59:02,426 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-12 23:59:02,427 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-12 23:59:02,427 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-12 23:59:02,428 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-12 23:59:02,430 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-12 23:59:02,430 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-12 23:59:02,430 INFO L138 SettingsManager]: * Use SBE=true [2021-10-12 23:59:02,431 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-10-12 23:59:02,431 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-10-12 23:59:02,431 INFO L138 SettingsManager]: * Use old map elimination=false [2021-10-12 23:59:02,432 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-10-12 23:59:02,432 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-10-12 23:59:02,433 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-10-12 23:59:02,433 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-12 23:59:02,433 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-12 23:59:02,433 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-12 23:59:02,433 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-12 23:59:02,434 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-12 23:59:02,434 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-12 23:59:02,434 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-10-12 23:59:02,434 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-10-12 23:59:02,435 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-10-12 23:59:02,435 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-12 23:59:02,435 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-12 23:59:02,435 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-10-12 23:59:02,435 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-12 23:59:02,436 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-10-12 23:59:02,436 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-12 23:59:02,436 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-12 23:59:02,436 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-12 23:59:02,437 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-12 23:59:02,437 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-12 23:59:02,438 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-10-12 23:59:02,438 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_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c81a149fe338374de067d63dbdea0d00d3f8a8fa [2021-10-12 23:59:02,765 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-12 23:59:02,801 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-12 23:59:02,804 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-12 23:59:02,805 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-12 23:59:02,806 INFO L275 PluginConnector]: CDTParser initialized [2021-10-12 23:59:02,807 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/recursive-simple/fibo_7-1.c [2021-10-12 23:59:02,880 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/data/ac15e8232/ef704b1349a742488a148b9e55cf2801/FLAG583b46c6b [2021-10-12 23:59:03,450 INFO L306 CDTParser]: Found 1 translation units. [2021-10-12 23:59:03,451 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/sv-benchmarks/c/recursive-simple/fibo_7-1.c [2021-10-12 23:59:03,461 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/data/ac15e8232/ef704b1349a742488a148b9e55cf2801/FLAG583b46c6b [2021-10-12 23:59:03,820 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/data/ac15e8232/ef704b1349a742488a148b9e55cf2801 [2021-10-12 23:59:03,824 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-12 23:59:03,826 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-12 23:59:03,828 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-12 23:59:03,828 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-12 23:59:03,831 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-12 23:59:03,832 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 11:59:03" (1/1) ... [2021-10-12 23:59:03,833 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32355393 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:03, skipping insertion in model container [2021-10-12 23:59:03,834 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 11:59:03" (1/1) ... [2021-10-12 23:59:03,840 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-12 23:59:03,853 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-12 23:59:03,985 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_39c5f5b7-1459-4a00-800f-227f2596899e/sv-benchmarks/c/recursive-simple/fibo_7-1.c[741,754] [2021-10-12 23:59:03,986 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-12 23:59:03,996 INFO L203 MainTranslator]: Completed pre-run [2021-10-12 23:59:04,011 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_39c5f5b7-1459-4a00-800f-227f2596899e/sv-benchmarks/c/recursive-simple/fibo_7-1.c[741,754] [2021-10-12 23:59:04,035 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-12 23:59:04,047 INFO L208 MainTranslator]: Completed translation [2021-10-12 23:59:04,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:04 WrapperNode [2021-10-12 23:59:04,048 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-12 23:59:04,049 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-12 23:59:04,049 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-12 23:59:04,049 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-12 23:59:04,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:04" (1/1) ... [2021-10-12 23:59:04,064 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:04" (1/1) ... [2021-10-12 23:59:04,081 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-12 23:59:04,082 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-12 23:59:04,082 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-12 23:59:04,082 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-12 23:59:04,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:04" (1/1) ... [2021-10-12 23:59:04,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:04" (1/1) ... [2021-10-12 23:59:04,092 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:04" (1/1) ... [2021-10-12 23:59:04,092 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:04" (1/1) ... [2021-10-12 23:59:04,096 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:04" (1/1) ... [2021-10-12 23:59:04,098 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:04" (1/1) ... [2021-10-12 23:59:04,108 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:04" (1/1) ... [2021-10-12 23:59:04,111 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-12 23:59:04,112 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-12 23:59:04,113 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-12 23:59:04,113 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-12 23:59:04,115 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:04" (1/1) ... [2021-10-12 23:59:04,122 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:04,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:04,150 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:04,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-10-12 23:59:04,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-12 23:59:04,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-12 23:59:04,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-12 23:59:04,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-12 23:59:04,205 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2021-10-12 23:59:04,205 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2021-10-12 23:59:04,388 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-12 23:59:04,388 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-12 23:59:04,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 11:59:04 BoogieIcfgContainer [2021-10-12 23:59:04,390 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-12 23:59:04,392 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-10-12 23:59:04,392 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-10-12 23:59:04,395 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-10-12 23:59:04,396 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-12 23:59:04,396 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 12.10 11:59:03" (1/3) ... [2021-10-12 23:59:04,401 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@6accfea2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 12.10 11:59:04, skipping insertion in model container [2021-10-12 23:59:04,401 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-12 23:59:04,401 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:04" (2/3) ... [2021-10-12 23:59:04,402 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@6accfea2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 12.10 11:59:04, skipping insertion in model container [2021-10-12 23:59:04,402 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-12 23:59:04,402 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 11:59:04" (3/3) ... [2021-10-12 23:59:04,404 INFO L389 chiAutomizerObserver]: Analyzing ICFG fibo_7-1.c [2021-10-12 23:59:04,458 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-10-12 23:59:04,458 INFO L360 BuchiCegarLoop]: Hoare is false [2021-10-12 23:59:04,459 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-10-12 23:59:04,459 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-12 23:59:04,459 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-12 23:59:04,459 INFO L364 BuchiCegarLoop]: Difference is false [2021-10-12 23:59:04,459 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-12 23:59:04,459 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-10-12 23:59:04,478 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) [2021-10-12 23:59:04,506 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-12 23:59:04,506 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-12 23:59:04,506 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-12 23:59:04,515 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-10-12 23:59:04,515 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-12 23:59:04,515 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-10-12 23:59:04,516 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) [2021-10-12 23:59:04,520 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-12 23:59:04,520 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-12 23:59:04,520 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-12 23:59:04,521 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-10-12 23:59:04,521 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-12 23:59:04,528 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 := 7; 6#L27true call main_#t~ret9 := fibo(main_~x~0);< 7#fiboENTRYtrue [2021-10-12 23:59:04,529 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 [2021-10-12 23:59:04,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:04,541 INFO L82 PathProgramCache]: Analyzing trace with hash 29883, now seen corresponding path program 1 times [2021-10-12 23:59:04,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:04,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581014515] [2021-10-12 23:59:04,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:04,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:04,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-12 23:59:04,676 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-12 23:59:04,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-12 23:59:04,756 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-12 23:59:04,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:04,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1450956, now seen corresponding path program 1 times [2021-10-12 23:59:04,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:04,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132910331] [2021-10-12 23:59:04,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:04,764 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:04,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-12 23:59:04,775 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-12 23:59:04,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-12 23:59:04,788 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-12 23:59:04,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:04,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1828301702, now seen corresponding path program 1 times [2021-10-12 23:59:04,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:04,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825244248] [2021-10-12 23:59:04,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:04,791 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:04,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-12 23:59:04,815 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-12 23:59:04,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-12 23:59:04,855 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-12 23:59:05,018 INFO L210 LassoAnalysis]: Preferences: [2021-10-12 23:59:05,018 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-12 23:59:05,018 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-12 23:59:05,019 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-12 23:59:05,019 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-12 23:59:05,019 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:05,019 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-12 23:59:05,019 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-12 23:59:05,020 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration1_Loop [2021-10-12 23:59:05,020 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-12 23:59:05,020 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-12 23:59:05,035 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-12 23:59:05,059 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-12 23:59:05,062 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-12 23:59:05,065 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-12 23:59:05,069 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-12 23:59:05,160 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-12 23:59:05,160 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-12 23:59:05,163 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:05,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:05,165 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:05,171 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-12 23:59:05,171 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-12 23:59:05,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-10-12 23:59:05,204 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-12 23:59:05,204 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-12 23:59:05,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:05,245 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:05,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:05,247 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:05,279 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-12 23:59:05,279 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-12 23:59:05,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-10-12 23:59:05,301 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-12 23:59:05,301 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-12 23:59:05,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:05,338 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:05,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:05,339 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:05,345 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-12 23:59:05,346 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-12 23:59:05,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-10-12 23:59:05,367 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-12 23:59:05,367 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-12 23:59:05,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:05,406 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:05,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:05,407 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:05,414 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-12 23:59:05,414 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-12 23:59:05,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-10-12 23:59:05,441 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-12 23:59:05,441 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-12 23:59:05,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:05,478 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:05,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:05,480 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:05,486 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-12 23:59:05,486 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-12 23:59:05,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-10-12 23:59:05,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:05,545 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:05,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:05,559 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:05,565 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-12 23:59:05,565 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-12 23:59:05,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-10-12 23:59:05,685 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-12 23:59:05,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:05,692 INFO L210 LassoAnalysis]: Preferences: [2021-10-12 23:59:05,693 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-12 23:59:05,693 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-12 23:59:05,693 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-12 23:59:05,693 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-12 23:59:05,693 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:05,693 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-12 23:59:05,693 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-12 23:59:05,693 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration1_Loop [2021-10-12 23:59:05,693 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-12 23:59:05,693 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-12 23:59:05,695 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-12 23:59:05,699 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-12 23:59:05,702 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-12 23:59:05,704 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-12 23:59:05,707 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-12 23:59:05,780 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-12 23:59:05,785 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-12 23:59:05,786 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:05,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:05,787 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:05,798 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 [2021-10-12 23:59:05,807 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-12 23:59:05,808 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-12 23:59:05,808 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-12 23:59:05,808 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-12 23:59:05,809 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-12 23:59:05,811 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-12 23:59:05,811 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-12 23:59:05,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-10-12 23:59:05,841 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-12 23:59:05,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:05,875 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:05,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:05,876 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:05,883 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 [2021-10-12 23:59:05,892 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-12 23:59:05,892 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-12 23:59:05,892 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-12 23:59:05,893 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-12 23:59:05,893 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-12 23:59:05,894 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-12 23:59:05,894 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-12 23:59:05,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-10-12 23:59:05,897 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-12 23:59:05,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:05,920 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:05,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:05,921 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:05,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-10-12 23:59:05,933 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-12 23:59:05,942 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-12 23:59:05,943 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-12 23:59:05,943 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-12 23:59:05,943 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-12 23:59:05,943 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-12 23:59:05,946 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-12 23:59:05,946 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-12 23:59:05,958 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-12 23:59:05,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:05,996 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:05,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:05,997 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:06,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-10-12 23:59:06,007 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 [2021-10-12 23:59:06,016 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-12 23:59:06,016 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-12 23:59:06,016 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-12 23:59:06,016 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-12 23:59:06,017 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-12 23:59:06,018 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-12 23:59:06,019 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-12 23:59:06,031 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-12 23:59:06,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:06,069 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:06,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:06,071 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:06,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-10-12 23:59:06,077 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 [2021-10-12 23:59:06,086 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-12 23:59:06,086 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-12 23:59:06,087 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-12 23:59:06,087 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-12 23:59:06,087 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-12 23:59:06,089 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-12 23:59:06,089 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-12 23:59:06,104 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-12 23:59:06,110 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-12 23:59:06,111 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-12 23:59:06,112 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:06,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:06,115 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:06,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-10-12 23:59:06,149 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-12 23:59:06,149 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-12 23:59:06,149 INFO L513 LassoAnalysis]: Proved termination. [2021-10-12 23:59:06,150 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2021-10-12 23:59:06,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:06,189 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-12 23:59:06,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:06,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:06,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-12 23:59:06,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:06,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:06,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-12 23:59:06,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:06,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:06,380 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 [2021-10-12 23:59:06,383 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) [2021-10-12 23:59:06,504 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. [2021-10-12 23:59:06,505 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 [2021-10-12 23:59:06,512 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) [2021-10-12 23:59:06,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2021-10-12 23:59:06,516 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2021-10-12 23:59:06,518 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-12 23:59:06,518 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2021-10-12 23:59:06,518 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-12 23:59:06,518 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2021-10-12 23:59:06,519 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-12 23:59:06,520 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 48 states and 60 transitions. [2021-10-12 23:59:06,531 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-12 23:59:06,539 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 48 states to 25 states and 34 transitions. [2021-10-12 23:59:06,540 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2021-10-12 23:59:06,540 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2021-10-12 23:59:06,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2021-10-12 23:59:06,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-12 23:59:06,541 INFO L681 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-10-12 23:59:06,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2021-10-12 23:59:06,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2021-10-12 23:59:06,571 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) [2021-10-12 23:59:06,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2021-10-12 23:59:06,576 INFO L704 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-10-12 23:59:06,576 INFO L587 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-10-12 23:59:06,576 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-10-12 23:59:06,576 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2021-10-12 23:59:06,578 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-12 23:59:06,578 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-12 23:59:06,578 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-12 23:59:06,580 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:06,580 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:06,580 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 := 7; 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 [2021-10-12 23:59:06,581 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 [2021-10-12 23:59:06,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:06,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1181449843, now seen corresponding path program 1 times [2021-10-12 23:59:06,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:06,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987380341] [2021-10-12 23:59:06,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:06,582 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:06,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:06,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-12 23:59:06,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:06,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-12 23:59:06,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:06,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987380341] [2021-10-12 23:59:06,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987380341] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:06,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:06,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-12 23:59:06,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213156204] [2021-10-12 23:59:06,722 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-12 23:59:06,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:06,724 INFO L82 PathProgramCache]: Analyzing trace with hash 246097683, now seen corresponding path program 1 times [2021-10-12 23:59:06,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:06,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790297125] [2021-10-12 23:59:06,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:06,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:06,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:06,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-10-12 23:59:06,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:06,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-12 23:59:06,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:06,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790297125] [2021-10-12 23:59:06,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790297125] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:06,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:06,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-12 23:59:06,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807542027] [2021-10-12 23:59:06,798 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-12 23:59:06,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:06,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-12 23:59:06,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-12 23:59:06,803 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) [2021-10-12 23:59:06,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:06,878 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-10-12 23:59:06,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-12 23:59:06,879 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2021-10-12 23:59:06,881 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-12 23:59:06,883 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2021-10-12 23:59:06,883 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2021-10-12 23:59:06,883 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2021-10-12 23:59:06,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2021-10-12 23:59:06,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-12 23:59:06,884 INFO L681 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-10-12 23:59:06,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2021-10-12 23:59:06,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-12 23:59:06,887 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) [2021-10-12 23:59:06,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-10-12 23:59:06,888 INFO L704 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-10-12 23:59:06,888 INFO L587 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-10-12 23:59:06,888 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-10-12 23:59:06,889 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2021-10-12 23:59:06,890 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-12 23:59:06,890 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-12 23:59:06,890 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-12 23:59:06,891 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:06,891 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:06,891 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 := 7; 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 [2021-10-12 23:59:06,891 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 [2021-10-12 23:59:06,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:06,892 INFO L82 PathProgramCache]: Analyzing trace with hash 2029785426, now seen corresponding path program 1 times [2021-10-12 23:59:06,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:06,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389729941] [2021-10-12 23:59:06,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:06,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:06,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:06,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-12 23:59:06,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:06,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:06,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:06,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389729941] [2021-10-12 23:59:06,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389729941] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:06,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908290671] [2021-10-12 23:59:06,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:06,949 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:06,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:06,950 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:06,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-12 23:59:07,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:07,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-12 23:59:07,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:07,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:07,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908290671] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:07,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:07,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-12 23:59:07,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260644233] [2021-10-12 23:59:07,081 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-12 23:59:07,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:07,081 INFO L82 PathProgramCache]: Analyzing trace with hash -960881524, now seen corresponding path program 1 times [2021-10-12 23:59:07,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:07,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271260593] [2021-10-12 23:59:07,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:07,082 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:07,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-12 23:59:07,087 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-12 23:59:07,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-12 23:59:07,111 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-12 23:59:07,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:07,278 INFO L210 LassoAnalysis]: Preferences: [2021-10-12 23:59:07,278 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-12 23:59:07,278 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-12 23:59:07,278 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-12 23:59:07,279 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-12 23:59:07,279 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:07,279 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-12 23:59:07,279 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-12 23:59:07,279 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration3_Loop [2021-10-12 23:59:07,279 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-12 23:59:07,279 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-12 23:59:07,280 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-12 23:59:07,282 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-12 23:59:07,289 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-12 23:59:07,292 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-12 23:59:07,332 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-12 23:59:07,332 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-12 23:59:07,332 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:07,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:07,337 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:07,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-10-12 23:59:07,343 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-12 23:59:07,344 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-12 23:59:07,363 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-12 23:59:07,363 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-12 23:59:07,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:07,396 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:07,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:07,401 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:07,407 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-12 23:59:07,407 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-12 23:59:07,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-10-12 23:59:07,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:07,459 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:07,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:07,460 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:07,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-10-12 23:59:07,463 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-12 23:59:07,463 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-12 23:59:08,585 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-12 23:59:08,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Ended with exit code 0 [2021-10-12 23:59:08,592 INFO L210 LassoAnalysis]: Preferences: [2021-10-12 23:59:08,592 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-12 23:59:08,593 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-12 23:59:08,593 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-12 23:59:08,593 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-12 23:59:08,593 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:08,593 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-12 23:59:08,593 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-12 23:59:08,593 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration3_Loop [2021-10-12 23:59:08,593 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-12 23:59:08,593 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-12 23:59:08,595 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-12 23:59:08,600 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-12 23:59:08,612 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-12 23:59:08,615 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-12 23:59:08,651 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-12 23:59:08,651 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-12 23:59:08,651 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:08,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:08,652 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:08,670 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 [2021-10-12 23:59:08,679 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-12 23:59:08,679 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-12 23:59:08,679 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-12 23:59:08,679 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-12 23:59:08,679 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-12 23:59:08,680 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-12 23:59:08,680 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-12 23:59:08,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-10-12 23:59:08,688 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-12 23:59:08,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Ended with exit code 0 [2021-10-12 23:59:08,716 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:08,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:08,718 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:08,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-10-12 23:59:08,719 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 [2021-10-12 23:59:08,726 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-12 23:59:08,727 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-12 23:59:08,727 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-12 23:59:08,727 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-12 23:59:08,727 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-12 23:59:08,729 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-12 23:59:08,729 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-12 23:59:08,734 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-12 23:59:08,738 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-12 23:59:08,738 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-12 23:59:08,738 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:08,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:08,739 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:08,744 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-12 23:59:08,745 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-12 23:59:08,745 INFO L513 LassoAnalysis]: Proved termination. [2021-10-12 23:59:08,745 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2021-10-12 23:59:08,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-10-12 23:59:08,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:08,766 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-12 23:59:08,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:08,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:08,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-12 23:59:08,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:08,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:08,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-12 23:59:08,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:09,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:09,103 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 [2021-10-12 23:59:09,103 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) [2021-10-12 23:59:09,350 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. [2021-10-12 23:59:09,351 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 [2021-10-12 23:59:09,351 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) [2021-10-12 23:59:09,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2021-10-12 23:59:09,353 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 10 letters. [2021-10-12 23:59:09,353 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-12 23:59:09,353 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 22 letters. Loop has 10 letters. [2021-10-12 23:59:09,354 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-12 23:59:09,354 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 20 letters. [2021-10-12 23:59:09,355 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-12 23:59:09,355 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 183 transitions. [2021-10-12 23:59:09,363 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-10-12 23:59:09,370 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 108 states and 152 transitions. [2021-10-12 23:59:09,370 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 64 [2021-10-12 23:59:09,371 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2021-10-12 23:59:09,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 152 transitions. [2021-10-12 23:59:09,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-12 23:59:09,375 INFO L681 BuchiCegarLoop]: Abstraction has 108 states and 152 transitions. [2021-10-12 23:59:09,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states and 152 transitions. [2021-10-12 23:59:09,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2021-10-12 23:59:09,394 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) [2021-10-12 23:59:09,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2021-10-12 23:59:09,398 INFO L704 BuchiCegarLoop]: Abstraction has 94 states and 126 transitions. [2021-10-12 23:59:09,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:09,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-12 23:59:09,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-12 23:59:09,399 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) [2021-10-12 23:59:09,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:09,478 INFO L93 Difference]: Finished difference Result 109 states and 147 transitions. [2021-10-12 23:59:09,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-12 23:59:09,479 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 109 states and 147 transitions. [2021-10-12 23:59:09,484 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-10-12 23:59:09,489 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 109 states to 106 states and 144 transitions. [2021-10-12 23:59:09,489 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 69 [2021-10-12 23:59:09,489 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2021-10-12 23:59:09,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 144 transitions. [2021-10-12 23:59:09,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-12 23:59:09,490 INFO L681 BuchiCegarLoop]: Abstraction has 106 states and 144 transitions. [2021-10-12 23:59:09,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states and 144 transitions. [2021-10-12 23:59:09,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2021-10-12 23:59:09,502 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) [2021-10-12 23:59:09,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 125 transitions. [2021-10-12 23:59:09,504 INFO L704 BuchiCegarLoop]: Abstraction has 94 states and 125 transitions. [2021-10-12 23:59:09,504 INFO L587 BuchiCegarLoop]: Abstraction has 94 states and 125 transitions. [2021-10-12 23:59:09,504 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-10-12 23:59:09,505 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 94 states and 125 transitions. [2021-10-12 23:59:09,507 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-10-12 23:59:09,507 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-12 23:59:09,507 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-12 23:59:09,509 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:09,509 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2021-10-12 23:59:09,510 INFO L791 eck$LassoCheckResult]: Stem: 736#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 737#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 7; 743#L27 call main_#t~ret9 := fibo(main_~x~0);< 754#fiboENTRY ~n := #in~n; 798#L8 assume !(~n < 1); 778#L10 assume !(1 == ~n); 742#L13 call #t~ret7 := fibo(~n - 1);< 744#fiboENTRY ~n := #in~n; 759#L8 assume !(~n < 1); 775#L10 assume !(1 == ~n); 758#L13 call #t~ret7 := fibo(~n - 1);< 744#fiboENTRY ~n := #in~n; 759#L8 assume !(~n < 1); 775#L10 assume !(1 == ~n); 758#L13 call #t~ret7 := fibo(~n - 1);< 744#fiboENTRY ~n := #in~n; 760#L8 assume !(~n < 1); 797#L10 assume 1 == ~n;#res := 1; 796#fiboFINAL assume true; 795#fiboEXIT >#33#return; 756#L13-1 call #t~ret8 := fibo(~n - 2);< 755#fiboENTRY ~n := #in~n; 757#L8 assume ~n < 1;#res := 0; 774#fiboFINAL assume true; 825#fiboEXIT >#35#return; 821#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 819#fiboFINAL assume true; 817#fiboEXIT >#33#return; 739#L13-1 [2021-10-12 23:59:09,510 INFO L793 eck$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 [2021-10-12 23:59:09,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:09,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1557778097, now seen corresponding path program 1 times [2021-10-12 23:59:09,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:09,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817111271] [2021-10-12 23:59:09,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:09,511 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:09,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:09,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-12 23:59:09,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:09,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:09,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-12 23:59:09,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:09,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-12 23:59:09,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:09,717 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-12 23:59:09,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:09,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817111271] [2021-10-12 23:59:09,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817111271] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:09,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063369585] [2021-10-12 23:59:09,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:09,719 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:09,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:09,721 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:09,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-12 23:59:09,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:09,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-12 23:59:09,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:09,926 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-12 23:59:09,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063369585] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:09,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:09,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-10-12 23:59:09,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056813996] [2021-10-12 23:59:09,927 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-12 23:59:09,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:09,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1616897917, now seen corresponding path program 1 times [2021-10-12 23:59:09,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:09,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450529896] [2021-10-12 23:59:09,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:09,928 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:09,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:09,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-10-12 23:59:09,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:09,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-12 23:59:09,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:10,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-12 23:59:10,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:10,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-12 23:59:10,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:10,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-12 23:59:10,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:10,084 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 26 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-12 23:59:10,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:10,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450529896] [2021-10-12 23:59:10,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450529896] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:10,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930671267] [2021-10-12 23:59:10,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:10,086 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:10,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:10,089 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:10,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-12 23:59:10,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:10,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-12 23:59:10,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:10,285 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-12 23:59:10,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930671267] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:10,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:10,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-10-12 23:59:10,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929853983] [2021-10-12 23:59:10,287 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-12 23:59:10,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:10,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-12 23:59:10,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-12 23:59:10,289 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) [2021-10-12 23:59:10,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:10,461 INFO L93 Difference]: Finished difference Result 116 states and 158 transitions. [2021-10-12 23:59:10,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-12 23:59:10,461 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 116 states and 158 transitions. [2021-10-12 23:59:10,474 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2021-10-12 23:59:10,484 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 116 states to 114 states and 156 transitions. [2021-10-12 23:59:10,484 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2021-10-12 23:59:10,486 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2021-10-12 23:59:10,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 114 states and 156 transitions. [2021-10-12 23:59:10,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-12 23:59:10,486 INFO L681 BuchiCegarLoop]: Abstraction has 114 states and 156 transitions. [2021-10-12 23:59:10,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states and 156 transitions. [2021-10-12 23:59:10,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-10-12 23:59:10,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 76 states have internal predecessors, (85), 26 states have call successors, (27), 13 states have call predecessors, (27), 18 states have return successors, (44), 24 states have call predecessors, (44), 24 states have call successors, (44) [2021-10-12 23:59:10,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 156 transitions. [2021-10-12 23:59:10,508 INFO L704 BuchiCegarLoop]: Abstraction has 114 states and 156 transitions. [2021-10-12 23:59:10,508 INFO L587 BuchiCegarLoop]: Abstraction has 114 states and 156 transitions. [2021-10-12 23:59:10,508 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-10-12 23:59:10,509 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 114 states and 156 transitions. [2021-10-12 23:59:10,514 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2021-10-12 23:59:10,514 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-12 23:59:10,514 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-12 23:59:10,518 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:10,518 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [8, 7, 6, 4, 4, 4, 4, 3, 3, 2, 2] [2021-10-12 23:59:10,518 INFO L791 eck$LassoCheckResult]: Stem: 1247#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 1248#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 7; 1265#L27 call main_#t~ret9 := fibo(main_~x~0);< 1266#fiboENTRY ~n := #in~n; 1308#L8 assume !(~n < 1); 1307#L10 assume !(1 == ~n); 1254#L13 call #t~ret7 := fibo(~n - 1);< 1268#fiboENTRY ~n := #in~n; 1269#L8 assume !(~n < 1); 1281#L10 assume !(1 == ~n); 1253#L13 call #t~ret7 := fibo(~n - 1);< 1255#fiboENTRY ~n := #in~n; 1305#L8 assume !(~n < 1); 1303#L10 assume !(1 == ~n); 1257#L13 call #t~ret7 := fibo(~n - 1);< 1255#fiboENTRY ~n := #in~n; 1305#L8 assume !(~n < 1); 1303#L10 assume !(1 == ~n); 1257#L13 call #t~ret7 := fibo(~n - 1);< 1255#fiboENTRY ~n := #in~n; 1306#L8 assume !(~n < 1); 1304#L10 assume 1 == ~n;#res := 1; 1302#fiboFINAL assume true; 1301#fiboEXIT >#33#return; 1275#L13-1 call #t~ret8 := fibo(~n - 2);< 1299#fiboENTRY ~n := #in~n; 1360#L8 assume ~n < 1;#res := 0; 1358#fiboFINAL assume true; 1274#fiboEXIT >#35#return; 1256#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1258#fiboFINAL assume true; 1270#fiboEXIT >#33#return; 1332#L13-1 [2021-10-12 23:59:10,518 INFO L793 eck$LassoCheckResult]: Loop: 1332#L13-1 call #t~ret8 := fibo(~n - 2);< 1342#fiboENTRY ~n := #in~n; 1346#L8 assume !(~n < 1); 1344#L10 assume !(1 == ~n); 1331#L13 call #t~ret7 := fibo(~n - 1);< 1342#fiboENTRY ~n := #in~n; 1346#L8 assume !(~n < 1); 1344#L10 assume !(1 == ~n); 1331#L13 call #t~ret7 := fibo(~n - 1);< 1342#fiboENTRY ~n := #in~n; 1346#L8 assume !(~n < 1); 1344#L10 assume !(1 == ~n); 1331#L13 call #t~ret7 := fibo(~n - 1);< 1342#fiboENTRY ~n := #in~n; 1346#L8 assume !(~n < 1); 1344#L10 assume 1 == ~n;#res := 1; 1283#fiboFINAL assume true; 1330#fiboEXIT >#33#return; 1251#L13-1 call #t~ret8 := fibo(~n - 2);< 1252#fiboENTRY ~n := #in~n; 1267#L8 assume ~n < 1;#res := 0; 1309#fiboFINAL assume true; 1348#fiboEXIT >#35#return; 1337#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1345#fiboFINAL assume true; 1340#fiboEXIT >#33#return; 1332#L13-1 call #t~ret8 := fibo(~n - 2);< 1342#fiboENTRY ~n := #in~n; 1346#L8 assume !(~n < 1); 1344#L10 assume !(1 == ~n); 1331#L13 call #t~ret7 := fibo(~n - 1);< 1342#fiboENTRY ~n := #in~n; 1346#L8 assume !(~n < 1); 1344#L10 assume 1 == ~n;#res := 1; 1283#fiboFINAL assume true; 1330#fiboEXIT >#33#return; 1251#L13-1 call #t~ret8 := fibo(~n - 2);< 1252#fiboENTRY ~n := #in~n; 1267#L8 assume ~n < 1;#res := 0; 1309#fiboFINAL assume true; 1348#fiboEXIT >#35#return; 1337#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1345#fiboFINAL assume true; 1340#fiboEXIT >#35#return; 1335#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1343#fiboFINAL assume true; 1338#fiboEXIT >#33#return; 1332#L13-1 [2021-10-12 23:59:10,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:10,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1730264506, now seen corresponding path program 2 times [2021-10-12 23:59:10,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:10,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768560465] [2021-10-12 23:59:10,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:10,519 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:10,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:10,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-12 23:59:10,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:10,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-12 23:59:10,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:10,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-12 23:59:10,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:10,681 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-12 23:59:10,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:10,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768560465] [2021-10-12 23:59:10,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768560465] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:10,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79883370] [2021-10-12 23:59:10,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-12 23:59:10,682 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:10,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:10,686 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:10,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-12 23:59:10,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-12 23:59:10,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:10,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-12 23:59:10,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:10,887 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-12 23:59:10,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79883370] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:10,888 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:10,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-10-12 23:59:10,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728059570] [2021-10-12 23:59:10,889 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-12 23:59:10,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:10,889 INFO L82 PathProgramCache]: Analyzing trace with hash 564146419, now seen corresponding path program 2 times [2021-10-12 23:59:10,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:10,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56737296] [2021-10-12 23:59:10,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:10,890 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:10,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:10,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-10-12 23:59:10,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:10,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-12 23:59:10,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:10,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-12 23:59:10,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:10,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-12 23:59:10,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:11,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-10-12 23:59:11,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:11,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-12 23:59:11,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:11,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-12 23:59:11,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:11,067 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 45 proven. 31 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-10-12 23:59:11,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:11,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56737296] [2021-10-12 23:59:11,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56737296] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:11,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631684440] [2021-10-12 23:59:11,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-12 23:59:11,068 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:11,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:11,070 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:11,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-12 23:59:11,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-12 23:59:11,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:11,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-12 23:59:11,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:11,342 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 38 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-10-12 23:59:11,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631684440] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:11,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:11,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-10-12 23:59:11,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37437244] [2021-10-12 23:59:11,343 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-12 23:59:11,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:11,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-12 23:59:11,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-10-12 23:59:11,344 INFO L87 Difference]: Start difference. First operand 114 states and 156 transitions. cyclomatic complexity: 48 Second operand has 14 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-12 23:59:11,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:11,621 INFO L93 Difference]: Finished difference Result 128 states and 172 transitions. [2021-10-12 23:59:11,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-12 23:59:11,622 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 128 states and 172 transitions. [2021-10-12 23:59:11,624 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2021-10-12 23:59:11,627 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 128 states to 126 states and 170 transitions. [2021-10-12 23:59:11,627 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 85 [2021-10-12 23:59:11,628 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 85 [2021-10-12 23:59:11,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 126 states and 170 transitions. [2021-10-12 23:59:11,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-12 23:59:11,629 INFO L681 BuchiCegarLoop]: Abstraction has 126 states and 170 transitions. [2021-10-12 23:59:11,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states and 170 transitions. [2021-10-12 23:59:11,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-10-12 23:59:11,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 78 states have (on average 1.1923076923076923) internal successors, (93), 84 states have internal predecessors, (93), 29 states have call successors, (30), 15 states have call predecessors, (30), 19 states have return successors, (47), 26 states have call predecessors, (47), 27 states have call successors, (47) [2021-10-12 23:59:11,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 170 transitions. [2021-10-12 23:59:11,642 INFO L704 BuchiCegarLoop]: Abstraction has 126 states and 170 transitions. [2021-10-12 23:59:11,642 INFO L587 BuchiCegarLoop]: Abstraction has 126 states and 170 transitions. [2021-10-12 23:59:11,642 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-10-12 23:59:11,642 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 126 states and 170 transitions. [2021-10-12 23:59:11,644 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2021-10-12 23:59:11,644 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-12 23:59:11,644 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-12 23:59:11,646 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [7, 6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:11,646 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-10-12 23:59:11,646 INFO L791 eck$LassoCheckResult]: Stem: 1880#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 1881#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 7; 1896#L27 call main_#t~ret9 := fibo(main_~x~0);< 1897#fiboENTRY ~n := #in~n; 1952#L8 assume !(~n < 1); 1920#L10 assume !(1 == ~n); 1894#L13 call #t~ret7 := fibo(~n - 1);< 1903#fiboENTRY ~n := #in~n; 1904#L8 assume !(~n < 1); 1912#L10 assume !(1 == ~n); 1893#L13 call #t~ret7 := fibo(~n - 1);< 1895#fiboENTRY ~n := #in~n; 1951#L8 assume !(~n < 1); 1950#L10 assume !(1 == ~n); 1883#L13 call #t~ret7 := fibo(~n - 1);< 1943#fiboENTRY ~n := #in~n; 1949#L8 assume !(~n < 1); 1948#L10 assume !(1 == ~n); 1884#L13 call #t~ret7 := fibo(~n - 1);< 1943#fiboENTRY ~n := #in~n; 1949#L8 assume !(~n < 1); 1948#L10 assume !(1 == ~n); 1884#L13 call #t~ret7 := fibo(~n - 1);< 1943#fiboENTRY ~n := #in~n; 1947#L8 assume !(~n < 1); 1946#L10 assume 1 == ~n;#res := 1; 1944#fiboFINAL assume true; 1942#fiboEXIT >#33#return; 1906#L13-1 call #t~ret8 := fibo(~n - 2);< 1938#fiboENTRY ~n := #in~n; 2005#L8 assume ~n < 1;#res := 0; 2003#fiboFINAL assume true; 1905#fiboEXIT >#35#return; 1882#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1885#fiboFINAL assume true; 1898#fiboEXIT >#33#return; 1914#L13-1 [2021-10-12 23:59:11,646 INFO L793 eck$LassoCheckResult]: Loop: 1914#L13-1 call #t~ret8 := fibo(~n - 2);< 1984#fiboENTRY ~n := #in~n; 2004#L8 assume !(~n < 1); 1913#L10 assume !(1 == ~n); 1915#L13 call #t~ret7 := fibo(~n - 1);< 1984#fiboENTRY ~n := #in~n; 2004#L8 assume !(~n < 1); 1913#L10 assume !(1 == ~n); 1915#L13 call #t~ret7 := fibo(~n - 1);< 1984#fiboENTRY ~n := #in~n; 2004#L8 assume !(~n < 1); 1913#L10 assume 1 == ~n;#res := 1; 1919#fiboFINAL assume true; 1990#fiboEXIT >#33#return; 1890#L13-1 call #t~ret8 := fibo(~n - 2);< 1892#fiboENTRY ~n := #in~n; 1993#L8 assume ~n < 1;#res := 0; 1994#fiboFINAL assume true; 1989#fiboEXIT >#35#return; 1975#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1987#fiboFINAL assume true; 1978#fiboEXIT >#33#return; 1914#L13-1 [2021-10-12 23:59:11,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:11,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1885019301, now seen corresponding path program 3 times [2021-10-12 23:59:11,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:11,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463004947] [2021-10-12 23:59:11,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:11,647 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:11,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:11,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-12 23:59:11,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:11,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-12 23:59:11,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:11,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-12 23:59:11,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:11,780 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-12 23:59:11,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:11,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463004947] [2021-10-12 23:59:11,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463004947] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:11,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608495976] [2021-10-12 23:59:11,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-12 23:59:11,781 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:11,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:11,785 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:11,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-12 23:59:11,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-10-12 23:59:11,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:11,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-12 23:59:11,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:12,046 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 5 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-12 23:59:12,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608495976] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:12,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:12,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 16 [2021-10-12 23:59:12,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917030104] [2021-10-12 23:59:12,048 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-12 23:59:12,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:12,048 INFO L82 PathProgramCache]: Analyzing trace with hash 780094678, now seen corresponding path program 3 times [2021-10-12 23:59:12,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:12,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005552328] [2021-10-12 23:59:12,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:12,048 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:12,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-12 23:59:12,054 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-12 23:59:12,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-12 23:59:12,059 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-12 23:59:12,390 INFO L210 LassoAnalysis]: Preferences: [2021-10-12 23:59:12,390 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-12 23:59:12,390 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-12 23:59:12,390 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-12 23:59:12,390 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-12 23:59:12,390 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:12,390 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-12 23:59:12,390 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-12 23:59:12,390 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration6_Loop [2021-10-12 23:59:12,390 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-12 23:59:12,390 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-12 23:59:12,391 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-12 23:59:12,394 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-12 23:59:12,405 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-12 23:59:12,408 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-12 23:59:12,465 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-12 23:59:12,465 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-12 23:59:12,465 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:12,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:12,467 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:12,474 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-12 23:59:12,474 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-12 23:59:12,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2021-10-12 23:59:12,484 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-12 23:59:12,484 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-12 23:59:12,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:12,507 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:12,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:12,508 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:12,511 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-12 23:59:12,511 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-12 23:59:12,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-10-12 23:59:12,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:12,569 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:12,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:12,573 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:12,575 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-12 23:59:12,575 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-12 23:59:12,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-10-12 23:59:13,929 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-12 23:59:13,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:13,941 INFO L210 LassoAnalysis]: Preferences: [2021-10-12 23:59:13,941 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-12 23:59:13,941 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-12 23:59:13,941 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-12 23:59:13,941 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-12 23:59:13,941 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:13,941 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-12 23:59:13,941 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-12 23:59:13,941 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration6_Loop [2021-10-12 23:59:13,941 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-12 23:59:13,941 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-12 23:59:13,942 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-12 23:59:13,947 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-12 23:59:13,958 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-12 23:59:13,960 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-12 23:59:14,023 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-12 23:59:14,023 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-12 23:59:14,023 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:14,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:14,027 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:14,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2021-10-12 23:59:14,030 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-12 23:59:14,037 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-12 23:59:14,037 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-12 23:59:14,037 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-12 23:59:14,037 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-12 23:59:14,038 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-12 23:59:14,039 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-12 23:59:14,039 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-12 23:59:14,053 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-12 23:59:14,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:14,090 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:14,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:14,091 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:14,097 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 [2021-10-12 23:59:14,106 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-12 23:59:14,107 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-12 23:59:14,107 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-12 23:59:14,107 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-12 23:59:14,107 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-12 23:59:14,108 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-12 23:59:14,108 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-12 23:59:14,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2021-10-12 23:59:14,111 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-12 23:59:14,115 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-12 23:59:14,115 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-12 23:59:14,115 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:14,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:14,116 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:14,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2021-10-12 23:59:14,117 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-12 23:59:14,117 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-12 23:59:14,117 INFO L513 LassoAnalysis]: Proved termination. [2021-10-12 23:59:14,117 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2021-10-12 23:59:14,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Ended with exit code 0 [2021-10-12 23:59:14,137 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-12 23:59:14,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:14,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:14,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-12 23:59:14,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:14,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:14,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-12 23:59:14,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:14,811 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-12 23:59:14,812 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2021-10-12 23:59:14,812 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 126 states and 170 transitions. cyclomatic complexity: 50 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-12 23:59:15,108 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 126 states and 170 transitions. cyclomatic complexity: 50. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 259 states and 358 transitions. Complement of second has 45 states. [2021-10-12 23:59:15,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2021-10-12 23:59:15,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-12 23:59:15,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 41 transitions. [2021-10-12 23:59:15,112 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 36 letters. Loop has 22 letters. [2021-10-12 23:59:15,112 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-12 23:59:15,112 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-12 23:59:15,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:15,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:15,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:15,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-12 23:59:15,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:15,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:15,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-12 23:59:15,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:15,729 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-12 23:59:15,730 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 7 loop predicates [2021-10-12 23:59:15,731 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 126 states and 170 transitions. cyclomatic complexity: 50 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-12 23:59:15,888 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 126 states and 170 transitions. cyclomatic complexity: 50. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 320 states and 431 transitions. Complement of second has 25 states. [2021-10-12 23:59:15,889 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 [2021-10-12 23:59:15,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-12 23:59:15,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 24 transitions. [2021-10-12 23:59:15,890 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 36 letters. Loop has 22 letters. [2021-10-12 23:59:15,890 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-12 23:59:15,891 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-12 23:59:15,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:15,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:15,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-12 23:59:15,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:16,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:16,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-12 23:59:16,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:16,545 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-12 23:59:16,546 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2021-10-12 23:59:16,546 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 126 states and 170 transitions. cyclomatic complexity: 50 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-12 23:59:16,825 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 126 states and 170 transitions. cyclomatic complexity: 50. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 1146 states and 1598 transitions. Complement of second has 138 states. [2021-10-12 23:59:16,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2021-10-12 23:59:16,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-12 23:59:16,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 46 transitions. [2021-10-12 23:59:16,827 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 36 letters. Loop has 22 letters. [2021-10-12 23:59:16,833 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-12 23:59:16,833 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 58 letters. Loop has 22 letters. [2021-10-12 23:59:16,837 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-12 23:59:16,837 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 36 letters. Loop has 44 letters. [2021-10-12 23:59:16,840 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-12 23:59:16,841 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1146 states and 1598 transitions. [2021-10-12 23:59:16,868 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 58 [2021-10-12 23:59:16,892 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1146 states to 652 states and 989 transitions. [2021-10-12 23:59:16,893 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 262 [2021-10-12 23:59:16,895 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 292 [2021-10-12 23:59:16,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 652 states and 989 transitions. [2021-10-12 23:59:16,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-12 23:59:16,896 INFO L681 BuchiCegarLoop]: Abstraction has 652 states and 989 transitions. [2021-10-12 23:59:16,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states and 989 transitions. [2021-10-12 23:59:16,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 486. [2021-10-12 23:59:16,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 296 states have (on average 1.1993243243243243) internal successors, (355), 317 states have internal predecessors, (355), 112 states have call successors, (126), 58 states have call predecessors, (126), 78 states have return successors, (217), 110 states have call predecessors, (217), 108 states have call successors, (217) [2021-10-12 23:59:16,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 698 transitions. [2021-10-12 23:59:16,970 INFO L704 BuchiCegarLoop]: Abstraction has 486 states and 698 transitions. [2021-10-12 23:59:16,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:16,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-12 23:59:16,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-10-12 23:59:16,971 INFO L87 Difference]: Start difference. First operand 486 states and 698 transitions. Second operand has 17 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 11 states have internal predecessors, (31), 8 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-12 23:59:17,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:17,198 INFO L93 Difference]: Finished difference Result 299 states and 382 transitions. [2021-10-12 23:59:17,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-12 23:59:17,198 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 299 states and 382 transitions. [2021-10-12 23:59:17,204 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-12 23:59:17,209 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 299 states to 270 states and 348 transitions. [2021-10-12 23:59:17,209 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 134 [2021-10-12 23:59:17,210 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 137 [2021-10-12 23:59:17,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 270 states and 348 transitions. [2021-10-12 23:59:17,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-12 23:59:17,210 INFO L681 BuchiCegarLoop]: Abstraction has 270 states and 348 transitions. [2021-10-12 23:59:17,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states and 348 transitions. [2021-10-12 23:59:17,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 235. [2021-10-12 23:59:17,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 144 states have (on average 1.1180555555555556) internal successors, (161), 154 states have internal predecessors, (161), 54 states have call successors, (58), 30 states have call predecessors, (58), 37 states have return successors, (85), 50 states have call predecessors, (85), 48 states have call successors, (85) [2021-10-12 23:59:17,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 304 transitions. [2021-10-12 23:59:17,224 INFO L704 BuchiCegarLoop]: Abstraction has 235 states and 304 transitions. [2021-10-12 23:59:17,224 INFO L587 BuchiCegarLoop]: Abstraction has 235 states and 304 transitions. [2021-10-12 23:59:17,224 INFO L425 BuchiCegarLoop]: ======== Iteration 7============ [2021-10-12 23:59:17,225 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 235 states and 304 transitions. [2021-10-12 23:59:17,227 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-12 23:59:17,227 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-12 23:59:17,227 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-12 23:59:17,231 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [10, 9, 8, 8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:17,232 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-12 23:59:17,233 INFO L791 eck$LassoCheckResult]: Stem: 5474#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); 5475#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 7; 5491#L27 call main_#t~ret9 := fibo(main_~x~0);< 5492#fiboENTRY ~n := #in~n; 5545#L8 assume !(~n < 1); 5544#L10 assume !(1 == ~n); 5540#L13 call #t~ret7 := fibo(~n - 1);< 5543#fiboENTRY ~n := #in~n; 5542#L8 assume !(~n < 1); 5541#L10 assume !(1 == ~n); 5536#L13 call #t~ret7 := fibo(~n - 1);< 5539#fiboENTRY ~n := #in~n; 5538#L8 assume !(~n < 1); 5537#L10 assume !(1 == ~n); 5531#L13 call #t~ret7 := fibo(~n - 1);< 5535#fiboENTRY ~n := #in~n; 5533#L8 assume !(~n < 1); 5534#L10 assume !(1 == ~n); 5528#L13 call #t~ret7 := fibo(~n - 1);< 5526#fiboENTRY ~n := #in~n; 5530#L8 assume !(~n < 1); 5532#L10 assume !(1 == ~n); 5527#L13 call #t~ret7 := fibo(~n - 1);< 5526#fiboENTRY ~n := #in~n; 5530#L8 assume !(~n < 1); 5532#L10 assume !(1 == ~n); 5527#L13 call #t~ret7 := fibo(~n - 1);< 5526#fiboENTRY ~n := #in~n; 5529#L8 assume !(~n < 1); 5697#L10 assume 1 == ~n;#res := 1; 5696#fiboFINAL assume true; 5693#fiboEXIT >#33#return; 5508#L13-1 call #t~ret8 := fibo(~n - 2);< 5690#fiboENTRY ~n := #in~n; 5507#L8 assume ~n < 1;#res := 0; 5509#fiboFINAL assume true; 5688#fiboEXIT >#35#return; 5687#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 5682#fiboFINAL assume true; 5603#fiboEXIT >#33#return; 5590#L13-1 call #t~ret8 := fibo(~n - 2);< 5600#fiboENTRY ~n := #in~n; 5640#L8 assume !(~n < 1); 5608#L10 assume !(1 == ~n); 5521#L13 call #t~ret7 := fibo(~n - 1);< 5478#fiboENTRY ~n := #in~n; 5520#L8 assume !(~n < 1); 5523#L10 assume !(1 == ~n); 5550#L13 call #t~ret7 := fibo(~n - 1);< 5552#fiboENTRY [2021-10-12 23:59:17,234 INFO L793 eck$LassoCheckResult]: Loop: 5552#fiboENTRY ~n := #in~n; 5570#L8 assume !(~n < 1); 5569#L10 assume !(1 == ~n); 5551#L13 call #t~ret7 := fibo(~n - 1);< 5552#fiboENTRY [2021-10-12 23:59:17,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:17,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1767901880, now seen corresponding path program 4 times [2021-10-12 23:59:17,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:17,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914780535] [2021-10-12 23:59:17,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:17,235 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:17,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:17,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-10-12 23:59:17,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:17,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-12 23:59:17,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:17,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-12 23:59:17,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:17,446 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 102 proven. 45 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-12 23:59:17,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:17,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914780535] [2021-10-12 23:59:17,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914780535] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:17,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218478351] [2021-10-12 23:59:17,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-12 23:59:17,447 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:17,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:17,448 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:17,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-12 23:59:17,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-12 23:59:17,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:17,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-12 23:59:17,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:17,838 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 103 proven. 45 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-12 23:59:17,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218478351] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:17,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:17,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 18 [2021-10-12 23:59:17,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189112851] [2021-10-12 23:59:17,839 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-12 23:59:17,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:17,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1450956, now seen corresponding path program 2 times [2021-10-12 23:59:17,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:17,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78462797] [2021-10-12 23:59:17,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:17,840 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:17,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-12 23:59:17,846 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-12 23:59:17,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-12 23:59:17,848 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-12 23:59:17,885 INFO L210 LassoAnalysis]: Preferences: [2021-10-12 23:59:17,885 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-12 23:59:17,885 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-12 23:59:17,885 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-12 23:59:17,885 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-12 23:59:17,885 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:17,885 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-12 23:59:17,885 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-12 23:59:17,885 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration7_Loop [2021-10-12 23:59:17,886 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-12 23:59:17,886 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-12 23:59:17,888 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-12 23:59:17,890 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-12 23:59:17,892 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-12 23:59:17,893 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-12 23:59:17,899 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-12 23:59:17,926 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-12 23:59:17,926 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-12 23:59:17,926 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:17,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:17,927 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:17,933 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-12 23:59:17,933 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-12 23:59:17,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2021-10-12 23:59:17,957 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-12 23:59:17,957 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-12 23:59:17,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:17,993 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:17,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:17,994 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:17,997 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-12 23:59:17,997 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-12 23:59:18,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2021-10-12 23:59:18,016 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-12 23:59:18,017 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-12 23:59:18,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:18,056 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:18,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:18,057 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:18,059 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-12 23:59:18,060 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-12 23:59:18,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2021-10-12 23:59:18,084 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-12 23:59:18,085 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-12 23:59:18,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Ended with exit code 0 [2021-10-12 23:59:18,113 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:18,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:18,115 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:18,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2021-10-12 23:59:18,117 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-12 23:59:18,117 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-12 23:59:18,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:18,146 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:18,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:18,147 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:18,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Waiting until timeout for monitored process [2021-10-12 23:59:18,149 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-12 23:59:18,149 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-12 23:59:18,186 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-12 23:59:18,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Ended with exit code 0 [2021-10-12 23:59:18,189 INFO L210 LassoAnalysis]: Preferences: [2021-10-12 23:59:18,189 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-12 23:59:18,189 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-12 23:59:18,189 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-12 23:59:18,189 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-12 23:59:18,189 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:18,189 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-12 23:59:18,190 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-12 23:59:18,190 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration7_Loop [2021-10-12 23:59:18,190 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-12 23:59:18,190 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-12 23:59:18,190 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-12 23:59:18,200 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-12 23:59:18,202 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-12 23:59:18,204 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-12 23:59:18,206 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-12 23:59:18,241 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-12 23:59:18,241 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-12 23:59:18,241 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:18,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:18,242 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:18,249 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 [2021-10-12 23:59:18,258 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-12 23:59:18,258 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-12 23:59:18,259 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-12 23:59:18,259 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-12 23:59:18,259 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-12 23:59:18,259 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-12 23:59:18,259 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-12 23:59:18,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Waiting until timeout for monitored process [2021-10-12 23:59:18,267 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-12 23:59:18,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:18,288 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:18,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:18,288 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:18,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Waiting until timeout for monitored process [2021-10-12 23:59:18,290 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 [2021-10-12 23:59:18,297 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-12 23:59:18,297 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-12 23:59:18,297 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-12 23:59:18,298 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-12 23:59:18,298 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-12 23:59:18,298 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-12 23:59:18,298 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-12 23:59:18,299 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-12 23:59:18,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:18,319 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:18,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:18,320 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:18,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Waiting until timeout for monitored process [2021-10-12 23:59:18,323 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 [2021-10-12 23:59:18,330 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-12 23:59:18,330 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-12 23:59:18,330 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-12 23:59:18,330 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-12 23:59:18,331 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-12 23:59:18,331 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-12 23:59:18,331 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-12 23:59:18,341 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-12 23:59:18,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Ended with exit code 0 [2021-10-12 23:59:18,363 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:18,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:18,363 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:18,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Waiting until timeout for monitored process [2021-10-12 23:59:18,366 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 [2021-10-12 23:59:18,373 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-12 23:59:18,373 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-12 23:59:18,373 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-12 23:59:18,373 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-12 23:59:18,373 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-12 23:59:18,373 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-12 23:59:18,373 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-12 23:59:18,398 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-12 23:59:18,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Ended with exit code 0 [2021-10-12 23:59:18,431 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:18,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:18,432 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:18,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Waiting until timeout for monitored process [2021-10-12 23:59:18,437 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 [2021-10-12 23:59:18,446 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-12 23:59:18,446 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-12 23:59:18,446 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-12 23:59:18,446 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-12 23:59:18,446 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-12 23:59:18,447 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-12 23:59:18,447 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-12 23:59:18,452 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-12 23:59:18,454 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-10-12 23:59:18,454 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-10-12 23:59:18,455 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-12 23:59:18,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:18,456 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:18,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Waiting until timeout for monitored process [2021-10-12 23:59:18,457 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-12 23:59:18,457 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-12 23:59:18,457 INFO L513 LassoAnalysis]: Proved termination. [2021-10-12 23:59:18,457 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2021-10-12 23:59:18,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:18,478 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-12 23:59:18,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:18,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:18,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-12 23:59:18,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:18,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Ended with exit code 0 [2021-10-12 23:59:19,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:19,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-12 23:59:19,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:19,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:19,033 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2021-10-12 23:59:19,034 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 235 states and 304 transitions. cyclomatic complexity: 73 Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-12 23:59:19,089 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 235 states and 304 transitions. cyclomatic complexity: 73. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 251 states and 320 transitions. Complement of second has 13 states. [2021-10-12 23:59:19,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2021-10-12 23:59:19,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-12 23:59:19,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2021-10-12 23:59:19,091 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 49 letters. Loop has 4 letters. [2021-10-12 23:59:19,091 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-12 23:59:19,091 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-12 23:59:19,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:19,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:19,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-12 23:59:19,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:19,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:19,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-12 23:59:19,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:19,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:19,571 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2021-10-12 23:59:19,571 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 235 states and 304 transitions. cyclomatic complexity: 73 Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-12 23:59:19,623 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 235 states and 304 transitions. cyclomatic complexity: 73. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 251 states and 320 transitions. Complement of second has 13 states. [2021-10-12 23:59:19,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2021-10-12 23:59:19,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-12 23:59:19,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2021-10-12 23:59:19,624 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 49 letters. Loop has 4 letters. [2021-10-12 23:59:19,624 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-12 23:59:19,625 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-12 23:59:19,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:19,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:19,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-12 23:59:19,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:20,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:20,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-12 23:59:20,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:20,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:20,193 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2021-10-12 23:59:20,193 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 235 states and 304 transitions. cyclomatic complexity: 73 Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-12 23:59:20,267 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 235 states and 304 transitions. cyclomatic complexity: 73. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 312 states and 383 transitions. Complement of second has 14 states. [2021-10-12 23:59:20,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2021-10-12 23:59:20,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-12 23:59:20,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2021-10-12 23:59:20,268 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 49 letters. Loop has 4 letters. [2021-10-12 23:59:20,269 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-12 23:59:20,269 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 53 letters. Loop has 4 letters. [2021-10-12 23:59:20,271 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-12 23:59:20,271 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 49 letters. Loop has 8 letters. [2021-10-12 23:59:20,274 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-12 23:59:20,274 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 312 states and 383 transitions. [2021-10-12 23:59:20,279 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-12 23:59:20,284 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 312 states to 249 states and 319 transitions. [2021-10-12 23:59:20,284 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 104 [2021-10-12 23:59:20,285 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 107 [2021-10-12 23:59:20,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 249 states and 319 transitions. [2021-10-12 23:59:20,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-12 23:59:20,285 INFO L681 BuchiCegarLoop]: Abstraction has 249 states and 319 transitions. [2021-10-12 23:59:20,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states and 319 transitions. [2021-10-12 23:59:20,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 243. [2021-10-12 23:59:20,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 152 states have (on average 1.111842105263158) internal successors, (169), 162 states have internal predecessors, (169), 54 states have call successors, (58), 30 states have call predecessors, (58), 37 states have return successors, (85), 50 states have call predecessors, (85), 48 states have call successors, (85) [2021-10-12 23:59:20,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 312 transitions. [2021-10-12 23:59:20,298 INFO L704 BuchiCegarLoop]: Abstraction has 243 states and 312 transitions. [2021-10-12 23:59:20,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:20,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-12 23:59:20,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-10-12 23:59:20,299 INFO L87 Difference]: Start difference. First operand 243 states and 312 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 11 states have internal predecessors, (34), 9 states have call successors, (11), 9 states have call predecessors, (11), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-12 23:59:20,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:20,555 INFO L93 Difference]: Finished difference Result 257 states and 308 transitions. [2021-10-12 23:59:20,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-12 23:59:20,555 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 257 states and 308 transitions. [2021-10-12 23:59:20,559 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-12 23:59:20,559 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 257 states to 0 states and 0 transitions. [2021-10-12 23:59:20,560 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-10-12 23:59:20,560 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-10-12 23:59:20,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-10-12 23:59:20,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-12 23:59:20,560 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-12 23:59:20,560 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-12 23:59:20,560 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-12 23:59:20,561 INFO L425 BuchiCegarLoop]: ======== Iteration 8============ [2021-10-12 23:59:20,561 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-10-12 23:59:20,561 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-12 23:59:20,561 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-10-12 23:59:20,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 12.10 11:59:20 BoogieIcfgContainer [2021-10-12 23:59:20,567 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-10-12 23:59:20,568 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-12 23:59:20,568 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-12 23:59:20,568 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-12 23:59:20,569 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 11:59:04" (3/4) ... [2021-10-12 23:59:20,572 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-12 23:59:20,572 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-12 23:59:20,573 INFO L168 Benchmark]: Toolchain (without parser) took 16746.64 ms. Allocated memory was 96.5 MB in the beginning and 157.3 MB in the end (delta: 60.8 MB). Free memory was 72.9 MB in the beginning and 43.2 MB in the end (delta: 29.7 MB). Peak memory consumption was 91.2 MB. Max. memory is 16.1 GB. [2021-10-12 23:59:20,574 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 96.5 MB. Free memory was 52.5 MB in the beginning and 52.4 MB in the end (delta: 77.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-12 23:59:20,574 INFO L168 Benchmark]: CACSL2BoogieTranslator took 220.15 ms. Allocated memory is still 96.5 MB. Free memory was 72.6 MB in the beginning and 73.1 MB in the end (delta: -482.9 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-12 23:59:20,574 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.22 ms. Allocated memory is still 96.5 MB. Free memory was 73.1 MB in the beginning and 71.8 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-12 23:59:20,575 INFO L168 Benchmark]: Boogie Preprocessor took 29.45 ms. Allocated memory is still 96.5 MB. Free memory was 71.8 MB in the beginning and 70.8 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-12 23:59:20,575 INFO L168 Benchmark]: RCFGBuilder took 278.24 ms. Allocated memory is still 96.5 MB. Free memory was 70.8 MB in the beginning and 61.9 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-12 23:59:20,576 INFO L168 Benchmark]: BuchiAutomizer took 16175.68 ms. Allocated memory was 96.5 MB in the beginning and 157.3 MB in the end (delta: 60.8 MB). Free memory was 61.7 MB in the beginning and 44.2 MB in the end (delta: 17.5 MB). Peak memory consumption was 80.4 MB. Max. memory is 16.1 GB. [2021-10-12 23:59:20,576 INFO L168 Benchmark]: Witness Printer took 4.26 ms. Allocated memory is still 157.3 MB. Free memory was 44.2 MB in the beginning and 43.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-12 23:59:20,578 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 96.5 MB. Free memory was 52.5 MB in the beginning and 52.4 MB in the end (delta: 77.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 220.15 ms. Allocated memory is still 96.5 MB. Free memory was 72.6 MB in the beginning and 73.1 MB in the end (delta: -482.9 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.22 ms. Allocated memory is still 96.5 MB. Free memory was 73.1 MB in the beginning and 71.8 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.45 ms. Allocated memory is still 96.5 MB. Free memory was 71.8 MB in the beginning and 70.8 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 278.24 ms. Allocated memory is still 96.5 MB. Free memory was 70.8 MB in the beginning and 61.9 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 16175.68 ms. Allocated memory was 96.5 MB in the beginning and 157.3 MB in the end (delta: 60.8 MB). Free memory was 61.7 MB in the beginning and 44.2 MB in the end (delta: 17.5 MB). Peak memory consumption was 80.4 MB. Max. memory is 16.1 GB. * Witness Printer took 4.26 ms. Allocated memory is still 157.3 MB. Free memory was 44.2 MB in the beginning and 43.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. 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 10 terminating modules (6 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 10 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. 6 modules have a trivial ranking function, the largest among these consists of 18 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 16.1s and 8 iterations. TraceHistogramMax:10. Analysis of lassos took 9.1s. Construction of modules took 0.9s. Büchi inclusion checks took 5.5s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 9. Automata minimization 196.0ms AutomataMinimizationTime, 9 MinimizatonAttempts, 238 StatesRemovedByMinimization, 6 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had 235 states and ocurred in iteration 6. Nontrivial modules had stage [2, 0, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 8/26 HoareTripleCheckerStatistics: 195 SDtfs, 456 SDslu, 341 SDs, 0 SdLazy, 1217 SolverSat, 312 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 994.8ms Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI3 SILT3 lasso0 LassoPreprocessingBenchmarks: Lassos: inital18 mio100 ax100 hnf96 lsp92 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq181 hnf93 smp75 dnf100 smp100 tf110 neg96 sie109 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 55ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 9 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 3.1s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-10-12 23:59:20,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:20,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:21,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:21,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:21,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:21,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:21,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-10-12 23:59:22,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c5f5b7-1459-4a00-800f-227f2596899e/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with exit code 0 Received shutdown request...