./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_10-1.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_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/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_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_10-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/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_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/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 faad93e560ba524ae1ece04545479d8bfc495d5f ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 00:00:19,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 00:00:19,026 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 00:00:19,063 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 00:00:19,064 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 00:00:19,065 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 00:00:19,067 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 00:00:19,069 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 00:00:19,078 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 00:00:19,079 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 00:00:19,080 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 00:00:19,082 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 00:00:19,082 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 00:00:19,084 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 00:00:19,086 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 00:00:19,088 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 00:00:19,089 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 00:00:19,090 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 00:00:19,093 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 00:00:19,095 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 00:00:19,097 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 00:00:19,100 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 00:00:19,102 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 00:00:19,103 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 00:00:19,107 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 00:00:19,108 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 00:00:19,108 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 00:00:19,109 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 00:00:19,110 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 00:00:19,111 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 00:00:19,111 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 00:00:19,112 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 00:00:19,117 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 00:00:19,118 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 00:00:19,119 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 00:00:19,120 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 00:00:19,120 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 00:00:19,121 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 00:00:19,121 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 00:00:19,122 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 00:00:19,123 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 00:00:19,128 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-10-13 00:00:19,181 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 00:00:19,189 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 00:00:19,190 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 00:00:19,191 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 00:00:19,192 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 00:00:19,192 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 00:00:19,193 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 00:00:19,193 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-10-13 00:00:19,193 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-10-13 00:00:19,193 INFO L138 SettingsManager]: * Use old map elimination=false [2021-10-13 00:00:19,194 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-10-13 00:00:19,195 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-10-13 00:00:19,195 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-10-13 00:00:19,195 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 00:00:19,195 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 00:00:19,196 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 00:00:19,196 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 00:00:19,196 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 00:00:19,196 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 00:00:19,197 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-10-13 00:00:19,197 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-10-13 00:00:19,197 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-10-13 00:00:19,197 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 00:00:19,197 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 00:00:19,198 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-10-13 00:00:19,198 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 00:00:19,198 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-10-13 00:00:19,198 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 00:00:19,199 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 00:00:19,199 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 00:00:19,199 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 00:00:19,200 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 00:00:19,201 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-10-13 00:00:19,201 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_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> faad93e560ba524ae1ece04545479d8bfc495d5f [2021-10-13 00:00:19,468 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 00:00:19,489 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 00:00:19,491 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 00:00:19,493 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 00:00:19,493 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 00:00:19,494 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/recursive-simple/fibo_10-1.c [2021-10-13 00:00:19,555 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/data/865d08006/4dc9e8435d0e43f69442dd518a931ad2/FLAG545a71632 [2021-10-13 00:00:19,977 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 00:00:19,977 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/sv-benchmarks/c/recursive-simple/fibo_10-1.c [2021-10-13 00:00:19,983 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/data/865d08006/4dc9e8435d0e43f69442dd518a931ad2/FLAG545a71632 [2021-10-13 00:00:20,378 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/data/865d08006/4dc9e8435d0e43f69442dd518a931ad2 [2021-10-13 00:00:20,380 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 00:00:20,381 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 00:00:20,385 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 00:00:20,398 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 00:00:20,401 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 00:00:20,402 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:00:20" (1/1) ... [2021-10-13 00:00:20,404 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fe1870b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:00:20, skipping insertion in model container [2021-10-13 00:00:20,404 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:00:20" (1/1) ... [2021-10-13 00:00:20,411 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 00:00:20,421 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 00:00:20,566 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_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/sv-benchmarks/c/recursive-simple/fibo_10-1.c[743,756] [2021-10-13 00:00:20,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:00:20,593 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 00:00:20,605 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_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/sv-benchmarks/c/recursive-simple/fibo_10-1.c[743,756] [2021-10-13 00:00:20,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:00:20,620 INFO L208 MainTranslator]: Completed translation [2021-10-13 00:00:20,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:00:20 WrapperNode [2021-10-13 00:00:20,621 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 00:00:20,622 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 00:00:20,622 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 00:00:20,622 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 00:00:20,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:00:20" (1/1) ... [2021-10-13 00:00:20,637 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:00:20" (1/1) ... [2021-10-13 00:00:20,654 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 00:00:20,655 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 00:00:20,655 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 00:00:20,655 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 00:00:20,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:00:20" (1/1) ... [2021-10-13 00:00:20,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:00:20" (1/1) ... [2021-10-13 00:00:20,665 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:00:20" (1/1) ... [2021-10-13 00:00:20,666 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:00:20" (1/1) ... [2021-10-13 00:00:20,669 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:00:20" (1/1) ... [2021-10-13 00:00:20,671 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:00:20" (1/1) ... [2021-10-13 00:00:20,672 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:00:20" (1/1) ... [2021-10-13 00:00:20,674 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 00:00:20,675 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 00:00:20,675 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 00:00:20,675 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 00:00:20,676 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:00:20" (1/1) ... [2021-10-13 00:00:20,684 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:20,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:20,707 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:20,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-10-13 00:00:20,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 00:00:20,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 00:00:20,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 00:00:20,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 00:00:20,762 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2021-10-13 00:00:20,762 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2021-10-13 00:00:20,979 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 00:00:20,979 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-13 00:00:20,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:00:20 BoogieIcfgContainer [2021-10-13 00:00:20,992 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 00:00:20,993 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-10-13 00:00:20,993 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-10-13 00:00:20,998 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-10-13 00:00:20,999 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-13 00:00:20,999 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 13.10 12:00:20" (1/3) ... [2021-10-13 00:00:21,000 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@115608cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 13.10 12:00:21, skipping insertion in model container [2021-10-13 00:00:21,001 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-13 00:00:21,001 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:00:20" (2/3) ... [2021-10-13 00:00:21,001 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@115608cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 13.10 12:00:21, skipping insertion in model container [2021-10-13 00:00:21,001 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-13 00:00:21,002 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:00:20" (3/3) ... [2021-10-13 00:00:21,003 INFO L389 chiAutomizerObserver]: Analyzing ICFG fibo_10-1.c [2021-10-13 00:00:21,067 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-10-13 00:00:21,067 INFO L360 BuchiCegarLoop]: Hoare is false [2021-10-13 00:00:21,067 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-10-13 00:00:21,083 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-13 00:00:21,084 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-13 00:00:21,084 INFO L364 BuchiCegarLoop]: Difference is false [2021-10-13 00:00:21,084 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-13 00:00:21,084 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-10-13 00:00:21,128 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) [2021-10-13 00:00:21,153 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-13 00:00:21,153 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:00:21,153 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:00:21,162 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-10-13 00:00:21,163 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-13 00:00:21,163 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-10-13 00:00:21,163 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) [2021-10-13 00:00:21,166 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-13 00:00:21,166 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:00:21,166 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:00:21,166 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-10-13 00:00:21,167 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-13 00:00:21,172 INFO L791 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 13#L-1true havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 6#L27true call main_#t~ret9 := fibo(main_~x~0);< 7#fiboENTRYtrue [2021-10-13 00:00:21,172 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 [2021-10-13 00:00:21,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:21,177 INFO L82 PathProgramCache]: Analyzing trace with hash 29883, now seen corresponding path program 1 times [2021-10-13 00:00:21,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:21,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041476616] [2021-10-13 00:00:21,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:21,187 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:21,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:00:21,277 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:00:21,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:00:21,314 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:00:21,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:21,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1450956, now seen corresponding path program 1 times [2021-10-13 00:00:21,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:21,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419244430] [2021-10-13 00:00:21,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:21,319 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:21,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:00:21,326 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:00:21,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:00:21,333 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:00:21,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:21,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1828301702, now seen corresponding path program 1 times [2021-10-13 00:00:21,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:21,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352773410] [2021-10-13 00:00:21,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:21,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:21,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:00:21,382 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:00:21,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:00:21,405 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:00:21,571 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:00:21,572 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:00:21,572 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:00:21,572 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:00:21,573 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-13 00:00:21,573 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:21,573 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:00:21,573 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:00:21,573 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration1_Loop [2021-10-13 00:00:21,574 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:00:21,575 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:00:21,589 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:21,596 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:21,599 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:21,601 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:21,604 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:21,661 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:00:21,662 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-13 00:00:21,664 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:21,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:21,666 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:21,692 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:00:21,692 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:00:21,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-10-13 00:00:21,724 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:00:21,725 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:00:21,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:21,755 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:21,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:21,756 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:21,764 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:00:21,764 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:00:21,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-10-13 00:00:21,789 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:00:21,789 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:00:21,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:21,823 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:21,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:21,824 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:21,836 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:00:21,836 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:00:21,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-10-13 00:00:21,856 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:00:21,856 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:00:21,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:21,893 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:21,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:21,896 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:21,904 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:00:21,904 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:00:21,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-10-13 00:00:21,925 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:00:21,926 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:00:21,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:21,963 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:21,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:21,965 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:21,976 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:00:21,976 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:00:21,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-10-13 00:00:22,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:22,023 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:22,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:22,024 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:22,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-10-13 00:00:22,025 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-13 00:00:22,026 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:00:22,105 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-13 00:00:22,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:22,108 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:00:22,108 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:00:22,108 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:00:22,108 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:00:22,108 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-13 00:00:22,108 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:22,108 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:00:22,108 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:00:22,108 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration1_Loop [2021-10-13 00:00:22,109 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:00:22,109 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:00:22,110 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:22,113 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:22,116 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:22,118 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:22,121 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:22,163 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:00:22,168 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-13 00:00:22,169 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:22,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:22,172 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:22,179 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 [2021-10-13 00:00:22,189 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:00:22,189 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:00:22,190 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:00:22,190 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:00:22,190 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:00:22,192 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:00:22,192 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:00:22,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-10-13 00:00:22,220 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:00:22,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:22,245 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:22,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:22,247 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:22,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-10-13 00:00:22,251 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 [2021-10-13 00:00:22,258 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:00:22,258 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:00:22,258 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:00:22,258 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:00:22,258 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:00:22,259 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:00:22,259 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:00:22,264 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:00:22,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Ended with exit code 0 [2021-10-13 00:00:22,284 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:22,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:22,285 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:22,286 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 [2021-10-13 00:00:22,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-10-13 00:00:22,293 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:00:22,294 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:00:22,294 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:00:22,294 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:00:22,294 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:00:22,295 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:00:22,295 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:00:22,307 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:00:22,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:22,330 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:22,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:22,331 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:22,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-10-13 00:00:22,336 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 [2021-10-13 00:00:22,343 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:00:22,343 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:00:22,343 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:00:22,344 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:00:22,344 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:00:22,345 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:00:22,345 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:00:22,355 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:00:22,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:22,376 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:22,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:22,377 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:22,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-10-13 00:00:22,379 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 [2021-10-13 00:00:22,387 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:00:22,387 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:00:22,388 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:00:22,388 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:00:22,388 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:00:22,389 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:00:22,389 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:00:22,409 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-13 00:00:22,414 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-13 00:00:22,414 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-13 00:00:22,415 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:22,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:22,416 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:22,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-10-13 00:00:22,421 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-13 00:00:22,421 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-13 00:00:22,421 INFO L513 LassoAnalysis]: Proved termination. [2021-10-13 00:00:22,421 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2021-10-13 00:00:22,447 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Ended with exit code 0 [2021-10-13 00:00:22,450 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-13 00:00:22,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:22,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:22,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 00:00:22,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:22,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 00:00:22,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:22,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:22,643 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 [2021-10-13 00:00:22,647 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) [2021-10-13 00:00:22,772 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. [2021-10-13 00:00:22,773 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 [2021-10-13 00:00:22,782 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) [2021-10-13 00:00:22,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2021-10-13 00:00:22,787 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2021-10-13 00:00:22,789 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:00:22,789 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2021-10-13 00:00:22,790 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:00:22,790 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2021-10-13 00:00:22,790 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:00:22,791 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 48 states and 60 transitions. [2021-10-13 00:00:22,803 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-13 00:00:22,810 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 48 states to 25 states and 34 transitions. [2021-10-13 00:00:22,812 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2021-10-13 00:00:22,812 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2021-10-13 00:00:22,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2021-10-13 00:00:22,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 00:00:22,813 INFO L681 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-10-13 00:00:22,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2021-10-13 00:00:22,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2021-10-13 00:00:22,840 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) [2021-10-13 00:00:22,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2021-10-13 00:00:22,842 INFO L704 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-10-13 00:00:22,842 INFO L587 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-10-13 00:00:22,842 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-10-13 00:00:22,842 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2021-10-13 00:00:22,843 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-13 00:00:22,843 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:00:22,844 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:00:22,845 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:22,845 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:22,845 INFO L791 eck$LassoCheckResult]: Stem: 122#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 123#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 128#L27 call main_#t~ret9 := fibo(main_~x~0);< 132#fiboENTRY ~n := #in~n; 133#L8 assume !(~n < 1); 138#L10 assume !(1 == ~n); 127#L13 call #t~ret7 := fibo(~n - 1);< 129#fiboENTRY ~n := #in~n; 134#L8 assume ~n < 1;#res := 0; 135#fiboFINAL assume true; 136#fiboEXIT >#33#return; 125#L13-1 [2021-10-13 00:00:22,845 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 [2021-10-13 00:00:22,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:22,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1181449843, now seen corresponding path program 1 times [2021-10-13 00:00:22,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:22,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515888024] [2021-10-13 00:00:22,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:22,847 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:22,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:22,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:00:22,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:22,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:00:22,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:22,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515888024] [2021-10-13 00:00:22,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515888024] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:22,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:22,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 00:00:22,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389170138] [2021-10-13 00:00:22,951 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-13 00:00:22,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:22,951 INFO L82 PathProgramCache]: Analyzing trace with hash 246097683, now seen corresponding path program 1 times [2021-10-13 00:00:22,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:22,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191079384] [2021-10-13 00:00:22,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:22,952 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:22,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:22,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-10-13 00:00:22,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:22,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:00:22,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:22,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191079384] [2021-10-13 00:00:22,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191079384] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:22,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:22,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 00:00:22,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075769417] [2021-10-13 00:00:22,996 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-13 00:00:22,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:22,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:00:22,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:00:23,001 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) [2021-10-13 00:00:23,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:23,062 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-10-13 00:00:23,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:00:23,063 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2021-10-13 00:00:23,065 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-13 00:00:23,066 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2021-10-13 00:00:23,067 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2021-10-13 00:00:23,067 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2021-10-13 00:00:23,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2021-10-13 00:00:23,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 00:00:23,067 INFO L681 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-10-13 00:00:23,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2021-10-13 00:00:23,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-13 00:00:23,070 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) [2021-10-13 00:00:23,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-10-13 00:00:23,073 INFO L704 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-10-13 00:00:23,073 INFO L587 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-10-13 00:00:23,073 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-10-13 00:00:23,073 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2021-10-13 00:00:23,074 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-13 00:00:23,074 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:00:23,075 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:00:23,075 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:23,075 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:23,076 INFO L791 eck$LassoCheckResult]: Stem: 195#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 196#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 201#L27 call main_#t~ret9 := fibo(main_~x~0);< 205#fiboENTRY ~n := #in~n; 207#L8 assume !(~n < 1); 211#L10 assume !(1 == ~n); 200#L13 call #t~ret7 := fibo(~n - 1);< 202#fiboENTRY ~n := #in~n; 208#L8 assume !(~n < 1); 210#L10 assume 1 == ~n;#res := 1; 212#fiboFINAL assume true; 214#fiboEXIT >#33#return; 198#L13-1 [2021-10-13 00:00:23,076 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 [2021-10-13 00:00:23,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:23,076 INFO L82 PathProgramCache]: Analyzing trace with hash 2029785426, now seen corresponding path program 1 times [2021-10-13 00:00:23,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:23,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744084689] [2021-10-13 00:00:23,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:23,089 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:23,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:23,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:00:23,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:23,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:23,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:23,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744084689] [2021-10-13 00:00:23,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744084689] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:23,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246309252] [2021-10-13 00:00:23,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:23,164 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:23,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:23,165 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:00:23,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:23,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-13 00:00:23,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:23,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 00:00:23,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:23,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:23,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246309252] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:23,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:00:23,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-13 00:00:23,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114876381] [2021-10-13 00:00:23,313 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-13 00:00:23,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:23,313 INFO L82 PathProgramCache]: Analyzing trace with hash -960881524, now seen corresponding path program 1 times [2021-10-13 00:00:23,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:23,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680712394] [2021-10-13 00:00:23,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:23,323 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:23,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:00:23,329 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:00:23,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:00:23,341 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:00:23,504 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:00:23,504 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:00:23,504 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:00:23,505 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:00:23,505 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-13 00:00:23,505 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:23,505 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:00:23,505 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:00:23,505 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration3_Loop [2021-10-13 00:00:23,505 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:00:23,505 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:00:23,506 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:23,509 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:23,516 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:23,520 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:23,559 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:00:23,560 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-13 00:00:23,560 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:23,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:23,568 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:23,600 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:00:23,600 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:00:23,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-10-13 00:00:23,620 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:00:23,620 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:00:23,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:23,657 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:23,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:23,658 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:23,663 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:00:23,664 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:00:23,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-10-13 00:00:23,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:23,696 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:23,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:23,696 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:23,699 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-13 00:00:23,699 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:00:23,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-10-13 00:00:24,769 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-13 00:00:24,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Ended with exit code 0 [2021-10-13 00:00:24,773 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:00:24,773 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:00:24,773 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:00:24,773 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:00:24,773 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-13 00:00:24,773 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:24,773 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:00:24,773 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:00:24,773 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration3_Loop [2021-10-13 00:00:24,773 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:00:24,773 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:00:24,776 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:24,796 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:24,812 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:24,815 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:24,853 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:00:24,853 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-13 00:00:24,853 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:24,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:24,855 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:24,886 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 [2021-10-13 00:00:24,897 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:00:24,897 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:00:24,897 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:00:24,897 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:00:24,897 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:00:24,898 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:00:24,898 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:00:24,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-10-13 00:00:24,907 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:00:24,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:24,947 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:24,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:24,952 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:24,958 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 [2021-10-13 00:00:24,968 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:00:24,968 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:00:24,968 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:00:24,968 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:00:24,968 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:00:24,971 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:00:24,971 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:00:24,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-10-13 00:00:24,995 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-13 00:00:25,000 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-13 00:00:25,001 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-13 00:00:25,001 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:25,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:25,003 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:25,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-10-13 00:00:25,012 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-13 00:00:25,012 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-13 00:00:25,012 INFO L513 LassoAnalysis]: Proved termination. [2021-10-13 00:00:25,012 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2021-10-13 00:00:25,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:25,044 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-13 00:00:25,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:25,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:25,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 00:00:25,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:25,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:25,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 00:00:25,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:25,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:25,401 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 [2021-10-13 00:00:25,402 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) [2021-10-13 00:00:25,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:25,663 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. [2021-10-13 00:00:25,664 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 [2021-10-13 00:00:25,664 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) [2021-10-13 00:00:25,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2021-10-13 00:00:25,665 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 10 letters. [2021-10-13 00:00:25,666 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:00:25,666 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 22 letters. Loop has 10 letters. [2021-10-13 00:00:25,667 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:00:25,667 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 20 letters. [2021-10-13 00:00:25,667 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:00:25,667 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 183 transitions. [2021-10-13 00:00:25,674 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-10-13 00:00:25,683 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 108 states and 152 transitions. [2021-10-13 00:00:25,685 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 64 [2021-10-13 00:00:25,686 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2021-10-13 00:00:25,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 152 transitions. [2021-10-13 00:00:25,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 00:00:25,687 INFO L681 BuchiCegarLoop]: Abstraction has 108 states and 152 transitions. [2021-10-13 00:00:25,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states and 152 transitions. [2021-10-13 00:00:25,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2021-10-13 00:00:25,709 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) [2021-10-13 00:00:25,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2021-10-13 00:00:25,715 INFO L704 BuchiCegarLoop]: Abstraction has 94 states and 126 transitions. [2021-10-13 00:00:25,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:25,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 00:00:25,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:00:25,717 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) [2021-10-13 00:00:25,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:25,794 INFO L93 Difference]: Finished difference Result 109 states and 147 transitions. [2021-10-13 00:00:25,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 00:00:25,795 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 109 states and 147 transitions. [2021-10-13 00:00:25,798 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-10-13 00:00:25,802 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 109 states to 106 states and 144 transitions. [2021-10-13 00:00:25,802 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 69 [2021-10-13 00:00:25,803 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2021-10-13 00:00:25,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 144 transitions. [2021-10-13 00:00:25,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 00:00:25,803 INFO L681 BuchiCegarLoop]: Abstraction has 106 states and 144 transitions. [2021-10-13 00:00:25,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states and 144 transitions. [2021-10-13 00:00:25,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2021-10-13 00:00:25,814 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) [2021-10-13 00:00:25,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 125 transitions. [2021-10-13 00:00:25,815 INFO L704 BuchiCegarLoop]: Abstraction has 94 states and 125 transitions. [2021-10-13 00:00:25,815 INFO L587 BuchiCegarLoop]: Abstraction has 94 states and 125 transitions. [2021-10-13 00:00:25,815 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-10-13 00:00:25,816 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 94 states and 125 transitions. [2021-10-13 00:00:25,817 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-10-13 00:00:25,818 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:00:25,818 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:00:25,819 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:25,820 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2021-10-13 00:00:25,820 INFO L791 eck$LassoCheckResult]: Stem: 736#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 737#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 743#L27 call main_#t~ret9 := fibo(main_~x~0);< 754#fiboENTRY ~n := #in~n; 798#L8 assume !(~n < 1); 778#L10 assume !(1 == ~n); 742#L13 call #t~ret7 := fibo(~n - 1);< 744#fiboENTRY ~n := #in~n; 759#L8 assume !(~n < 1); 775#L10 assume !(1 == ~n); 758#L13 call #t~ret7 := fibo(~n - 1);< 744#fiboENTRY ~n := #in~n; 759#L8 assume !(~n < 1); 775#L10 assume !(1 == ~n); 758#L13 call #t~ret7 := fibo(~n - 1);< 744#fiboENTRY ~n := #in~n; 760#L8 assume !(~n < 1); 797#L10 assume 1 == ~n;#res := 1; 796#fiboFINAL assume true; 795#fiboEXIT >#33#return; 756#L13-1 call #t~ret8 := fibo(~n - 2);< 755#fiboENTRY ~n := #in~n; 757#L8 assume ~n < 1;#res := 0; 774#fiboFINAL assume true; 825#fiboEXIT >#35#return; 821#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 819#fiboFINAL assume true; 817#fiboEXIT >#33#return; 739#L13-1 [2021-10-13 00:00:25,820 INFO L793 eck$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 [2021-10-13 00:00:25,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:25,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1557778097, now seen corresponding path program 1 times [2021-10-13 00:00:25,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:25,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776782575] [2021-10-13 00:00:25,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:25,821 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:25,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:25,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-13 00:00:25,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:25,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:00:25,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:25,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 00:00:25,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:25,992 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 00:00:25,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:25,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776782575] [2021-10-13 00:00:25,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776782575] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:25,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67375406] [2021-10-13 00:00:25,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:25,993 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:25,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:26,003 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:00:26,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-13 00:00:26,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:26,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 00:00:26,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:26,182 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 00:00:26,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67375406] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:26,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:00:26,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-10-13 00:00:26,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349647687] [2021-10-13 00:00:26,184 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-13 00:00:26,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:26,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1616897917, now seen corresponding path program 1 times [2021-10-13 00:00:26,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:26,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356666969] [2021-10-13 00:00:26,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:26,185 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:26,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:26,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-10-13 00:00:26,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:26,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:00:26,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:26,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 00:00:26,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:26,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:00:26,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:26,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 00:00:26,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:26,299 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 26 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-13 00:00:26,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:26,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356666969] [2021-10-13 00:00:26,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356666969] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:26,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541522127] [2021-10-13 00:00:26,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:26,300 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:26,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:26,301 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:00:26,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-13 00:00:26,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:26,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 00:00:26,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:26,472 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-13 00:00:26,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541522127] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:26,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:00:26,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-10-13 00:00:26,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400426779] [2021-10-13 00:00:26,474 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-13 00:00:26,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:26,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 00:00:26,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-13 00:00:26,475 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) [2021-10-13 00:00:26,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:26,675 INFO L93 Difference]: Finished difference Result 116 states and 158 transitions. [2021-10-13 00:00:26,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 00:00:26,676 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 116 states and 158 transitions. [2021-10-13 00:00:26,684 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2021-10-13 00:00:26,691 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 116 states to 114 states and 156 transitions. [2021-10-13 00:00:26,691 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2021-10-13 00:00:26,693 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2021-10-13 00:00:26,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 114 states and 156 transitions. [2021-10-13 00:00:26,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 00:00:26,693 INFO L681 BuchiCegarLoop]: Abstraction has 114 states and 156 transitions. [2021-10-13 00:00:26,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states and 156 transitions. [2021-10-13 00:00:26,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-10-13 00:00:26,708 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) [2021-10-13 00:00:26,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 156 transitions. [2021-10-13 00:00:26,710 INFO L704 BuchiCegarLoop]: Abstraction has 114 states and 156 transitions. [2021-10-13 00:00:26,710 INFO L587 BuchiCegarLoop]: Abstraction has 114 states and 156 transitions. [2021-10-13 00:00:26,710 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-10-13 00:00:26,710 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 114 states and 156 transitions. [2021-10-13 00:00:26,712 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2021-10-13 00:00:26,712 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:00:26,712 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:00:26,714 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:26,714 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [8, 7, 6, 4, 4, 4, 4, 3, 3, 2, 2] [2021-10-13 00:00:26,715 INFO L791 eck$LassoCheckResult]: Stem: 1247#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 1248#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 1265#L27 call main_#t~ret9 := fibo(main_~x~0);< 1266#fiboENTRY ~n := #in~n; 1308#L8 assume !(~n < 1); 1307#L10 assume !(1 == ~n); 1254#L13 call #t~ret7 := fibo(~n - 1);< 1268#fiboENTRY ~n := #in~n; 1269#L8 assume !(~n < 1); 1281#L10 assume !(1 == ~n); 1253#L13 call #t~ret7 := fibo(~n - 1);< 1255#fiboENTRY ~n := #in~n; 1305#L8 assume !(~n < 1); 1303#L10 assume !(1 == ~n); 1257#L13 call #t~ret7 := fibo(~n - 1);< 1255#fiboENTRY ~n := #in~n; 1305#L8 assume !(~n < 1); 1303#L10 assume !(1 == ~n); 1257#L13 call #t~ret7 := fibo(~n - 1);< 1255#fiboENTRY ~n := #in~n; 1306#L8 assume !(~n < 1); 1304#L10 assume 1 == ~n;#res := 1; 1302#fiboFINAL assume true; 1301#fiboEXIT >#33#return; 1275#L13-1 call #t~ret8 := fibo(~n - 2);< 1299#fiboENTRY ~n := #in~n; 1360#L8 assume ~n < 1;#res := 0; 1358#fiboFINAL assume true; 1274#fiboEXIT >#35#return; 1256#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1258#fiboFINAL assume true; 1270#fiboEXIT >#33#return; 1332#L13-1 [2021-10-13 00:00:26,715 INFO L793 eck$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 [2021-10-13 00:00:26,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:26,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1730264506, now seen corresponding path program 2 times [2021-10-13 00:00:26,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:26,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962193271] [2021-10-13 00:00:26,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:26,716 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:26,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:26,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-13 00:00:26,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:26,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:00:26,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:26,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 00:00:26,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:26,834 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 00:00:26,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:26,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962193271] [2021-10-13 00:00:26,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962193271] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:26,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84027191] [2021-10-13 00:00:26,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:00:26,835 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:26,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:26,837 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:00:26,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-13 00:00:26,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:00:26,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:00:26,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 00:00:26,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:27,050 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 00:00:27,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84027191] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:27,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:00:27,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-10-13 00:00:27,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848752988] [2021-10-13 00:00:27,058 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-13 00:00:27,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:27,059 INFO L82 PathProgramCache]: Analyzing trace with hash 564146419, now seen corresponding path program 2 times [2021-10-13 00:00:27,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:27,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892985852] [2021-10-13 00:00:27,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:27,062 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:27,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:27,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-10-13 00:00:27,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:27,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:00:27,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:27,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:00:27,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:27,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 00:00:27,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:27,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-10-13 00:00:27,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:27,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:00:27,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:27,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 00:00:27,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:27,228 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 45 proven. 31 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-10-13 00:00:27,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:27,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892985852] [2021-10-13 00:00:27,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892985852] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:27,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967953835] [2021-10-13 00:00:27,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:00:27,229 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:27,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:27,231 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:00:27,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-13 00:00:27,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:00:27,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:00:27,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 00:00:27,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:27,499 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 38 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-10-13 00:00:27,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967953835] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:27,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:00:27,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-10-13 00:00:27,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813736972] [2021-10-13 00:00:27,501 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-13 00:00:27,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:27,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 00:00:27,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-10-13 00:00:27,502 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) [2021-10-13 00:00:27,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:27,760 INFO L93 Difference]: Finished difference Result 128 states and 172 transitions. [2021-10-13 00:00:27,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 00:00:27,760 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 128 states and 172 transitions. [2021-10-13 00:00:27,763 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2021-10-13 00:00:27,767 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 128 states to 126 states and 170 transitions. [2021-10-13 00:00:27,767 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 85 [2021-10-13 00:00:27,768 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 85 [2021-10-13 00:00:27,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 126 states and 170 transitions. [2021-10-13 00:00:27,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 00:00:27,769 INFO L681 BuchiCegarLoop]: Abstraction has 126 states and 170 transitions. [2021-10-13 00:00:27,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states and 170 transitions. [2021-10-13 00:00:27,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-10-13 00:00:27,780 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) [2021-10-13 00:00:27,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 170 transitions. [2021-10-13 00:00:27,782 INFO L704 BuchiCegarLoop]: Abstraction has 126 states and 170 transitions. [2021-10-13 00:00:27,782 INFO L587 BuchiCegarLoop]: Abstraction has 126 states and 170 transitions. [2021-10-13 00:00:27,782 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-10-13 00:00:27,783 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 126 states and 170 transitions. [2021-10-13 00:00:27,784 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2021-10-13 00:00:27,784 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:00:27,785 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:00:27,786 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [7, 6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:27,786 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-10-13 00:00:27,787 INFO L791 eck$LassoCheckResult]: Stem: 1880#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 1881#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 1896#L27 call main_#t~ret9 := fibo(main_~x~0);< 1897#fiboENTRY ~n := #in~n; 1952#L8 assume !(~n < 1); 1920#L10 assume !(1 == ~n); 1894#L13 call #t~ret7 := fibo(~n - 1);< 1903#fiboENTRY ~n := #in~n; 1904#L8 assume !(~n < 1); 1912#L10 assume !(1 == ~n); 1893#L13 call #t~ret7 := fibo(~n - 1);< 1895#fiboENTRY ~n := #in~n; 1951#L8 assume !(~n < 1); 1950#L10 assume !(1 == ~n); 1883#L13 call #t~ret7 := fibo(~n - 1);< 1943#fiboENTRY ~n := #in~n; 1949#L8 assume !(~n < 1); 1948#L10 assume !(1 == ~n); 1884#L13 call #t~ret7 := fibo(~n - 1);< 1943#fiboENTRY ~n := #in~n; 1949#L8 assume !(~n < 1); 1948#L10 assume !(1 == ~n); 1884#L13 call #t~ret7 := fibo(~n - 1);< 1943#fiboENTRY ~n := #in~n; 1947#L8 assume !(~n < 1); 1946#L10 assume 1 == ~n;#res := 1; 1944#fiboFINAL assume true; 1942#fiboEXIT >#33#return; 1906#L13-1 call #t~ret8 := fibo(~n - 2);< 1938#fiboENTRY ~n := #in~n; 2005#L8 assume ~n < 1;#res := 0; 2003#fiboFINAL assume true; 1905#fiboEXIT >#35#return; 1882#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1885#fiboFINAL assume true; 1898#fiboEXIT >#33#return; 1914#L13-1 [2021-10-13 00:00:27,787 INFO L793 eck$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 [2021-10-13 00:00:27,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:27,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1885019301, now seen corresponding path program 3 times [2021-10-13 00:00:27,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:27,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825739407] [2021-10-13 00:00:27,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:27,788 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:27,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:27,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-13 00:00:27,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:27,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:00:27,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:27,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 00:00:27,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:27,947 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 00:00:27,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:27,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825739407] [2021-10-13 00:00:27,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825739407] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:27,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821727714] [2021-10-13 00:00:27,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:00:27,948 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:27,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:27,952 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:00:27,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-13 00:00:28,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-10-13 00:00:28,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:00:28,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 00:00:28,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:28,210 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 5 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 00:00:28,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821727714] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:28,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:00:28,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 16 [2021-10-13 00:00:28,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012744276] [2021-10-13 00:00:28,212 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-13 00:00:28,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:28,212 INFO L82 PathProgramCache]: Analyzing trace with hash 780094678, now seen corresponding path program 3 times [2021-10-13 00:00:28,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:28,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978399535] [2021-10-13 00:00:28,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:28,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:28,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:00:28,219 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:00:28,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:00:28,235 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:00:28,540 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:00:28,540 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:00:28,540 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:00:28,540 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:00:28,541 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-13 00:00:28,541 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:28,541 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:00:28,541 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:00:28,541 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration6_Loop [2021-10-13 00:00:28,541 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:00:28,541 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:00:28,542 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:28,544 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:28,555 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:28,557 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:28,615 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:00:28,615 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-13 00:00:28,615 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:28,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:28,617 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:28,619 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:00:28,619 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:00:28,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2021-10-13 00:00:28,648 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:00:28,648 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:00:28,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:28,692 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:28,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:28,693 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:28,695 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:00:28,695 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:00:28,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-10-13 00:00:28,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:28,761 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:28,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:28,762 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:28,790 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-13 00:00:28,790 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:00:28,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-10-13 00:00:30,140 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-13 00:00:30,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:30,150 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:00:30,150 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:00:30,150 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:00:30,150 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:00:30,150 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-13 00:00:30,150 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:30,150 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:00:30,150 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:00:30,151 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration6_Loop [2021-10-13 00:00:30,151 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:00:30,151 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:00:30,152 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:30,155 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:30,165 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:30,167 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:30,221 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:00:30,221 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-13 00:00:30,221 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:30,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:30,222 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:30,233 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 [2021-10-13 00:00:30,242 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:00:30,242 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:00:30,242 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:00:30,242 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:00:30,242 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:00:30,246 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:00:30,246 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:00:30,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2021-10-13 00:00:30,255 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:00:30,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Ended with exit code 0 [2021-10-13 00:00:30,284 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:30,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:30,285 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:30,286 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 [2021-10-13 00:00:30,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2021-10-13 00:00:30,294 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:00:30,294 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:00:30,294 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:00:30,294 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:00:30,294 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:00:30,295 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:00:30,295 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:00:30,301 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-13 00:00:30,304 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-13 00:00:30,304 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-13 00:00:30,304 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:30,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:30,305 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:30,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2021-10-13 00:00:30,307 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-13 00:00:30,307 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-13 00:00:30,307 INFO L513 LassoAnalysis]: Proved termination. [2021-10-13 00:00:30,307 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2021-10-13 00:00:30,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Ended with exit code 0 [2021-10-13 00:00:30,330 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-13 00:00:30,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:30,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:30,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 00:00:30,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:30,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:30,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 00:00:30,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:31,013 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 00:00:31,014 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 [2021-10-13 00:00:31,014 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) [2021-10-13 00:00:31,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:31,300 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. [2021-10-13 00:00:31,303 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 [2021-10-13 00:00:31,303 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) [2021-10-13 00:00:31,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 41 transitions. [2021-10-13 00:00:31,304 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 36 letters. Loop has 22 letters. [2021-10-13 00:00:31,305 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:00:31,305 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-13 00:00:31,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:31,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:31,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 00:00:31,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:31,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:31,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 00:00:31,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:31,862 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 00:00:31,863 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 [2021-10-13 00:00:31,864 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) [2021-10-13 00:00:32,026 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. [2021-10-13 00:00:32,027 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 [2021-10-13 00:00:32,027 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) [2021-10-13 00:00:32,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 24 transitions. [2021-10-13 00:00:32,028 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 36 letters. Loop has 22 letters. [2021-10-13 00:00:32,028 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:00:32,028 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-13 00:00:32,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:32,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:32,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 00:00:32,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:32,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:32,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 00:00:32,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:32,710 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 00:00:32,711 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 [2021-10-13 00:00:32,711 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) [2021-10-13 00:00:33,014 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. [2021-10-13 00:00:33,014 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 [2021-10-13 00:00:33,015 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) [2021-10-13 00:00:33,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 46 transitions. [2021-10-13 00:00:33,016 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 36 letters. Loop has 22 letters. [2021-10-13 00:00:33,021 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:00:33,022 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 58 letters. Loop has 22 letters. [2021-10-13 00:00:33,023 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:00:33,023 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 36 letters. Loop has 44 letters. [2021-10-13 00:00:33,026 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:00:33,026 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1146 states and 1598 transitions. [2021-10-13 00:00:33,069 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 58 [2021-10-13 00:00:33,091 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1146 states to 652 states and 989 transitions. [2021-10-13 00:00:33,091 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 262 [2021-10-13 00:00:33,094 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 292 [2021-10-13 00:00:33,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 652 states and 989 transitions. [2021-10-13 00:00:33,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 00:00:33,095 INFO L681 BuchiCegarLoop]: Abstraction has 652 states and 989 transitions. [2021-10-13 00:00:33,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states and 989 transitions. [2021-10-13 00:00:33,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 486. [2021-10-13 00:00:33,151 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) [2021-10-13 00:00:33,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 698 transitions. [2021-10-13 00:00:33,162 INFO L704 BuchiCegarLoop]: Abstraction has 486 states and 698 transitions. [2021-10-13 00:00:33,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:33,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 00:00:33,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-10-13 00:00:33,163 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) [2021-10-13 00:00:33,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:33,406 INFO L93 Difference]: Finished difference Result 296 states and 375 transitions. [2021-10-13 00:00:33,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 00:00:33,407 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 296 states and 375 transitions. [2021-10-13 00:00:33,412 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-13 00:00:33,417 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 296 states to 270 states and 344 transitions. [2021-10-13 00:00:33,418 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 134 [2021-10-13 00:00:33,418 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 137 [2021-10-13 00:00:33,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 270 states and 344 transitions. [2021-10-13 00:00:33,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 00:00:33,418 INFO L681 BuchiCegarLoop]: Abstraction has 270 states and 344 transitions. [2021-10-13 00:00:33,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states and 344 transitions. [2021-10-13 00:00:33,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 229. [2021-10-13 00:00:33,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 141 states have (on average 1.1205673758865249) internal successors, (158), 148 states have internal predecessors, (158), 54 states have call successors, (58), 30 states have call predecessors, (58), 34 states have return successors, (77), 50 states have call predecessors, (77), 48 states have call successors, (77) [2021-10-13 00:00:33,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 293 transitions. [2021-10-13 00:00:33,429 INFO L704 BuchiCegarLoop]: Abstraction has 229 states and 293 transitions. [2021-10-13 00:00:33,429 INFO L587 BuchiCegarLoop]: Abstraction has 229 states and 293 transitions. [2021-10-13 00:00:33,430 INFO L425 BuchiCegarLoop]: ======== Iteration 7============ [2021-10-13 00:00:33,430 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 229 states and 293 transitions. [2021-10-13 00:00:33,432 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-13 00:00:33,432 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:00:33,432 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:00:33,436 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [10, 9, 8, 8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:33,436 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-13 00:00:33,438 INFO L791 eck$LassoCheckResult]: Stem: 5471#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 5472#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 5490#L27 call main_#t~ret9 := fibo(main_~x~0);< 5491#fiboENTRY ~n := #in~n; 5545#L8 assume !(~n < 1); 5544#L10 assume !(1 == ~n); 5540#L13 call #t~ret7 := fibo(~n - 1);< 5543#fiboENTRY ~n := #in~n; 5542#L8 assume !(~n < 1); 5541#L10 assume !(1 == ~n); 5536#L13 call #t~ret7 := fibo(~n - 1);< 5539#fiboENTRY ~n := #in~n; 5538#L8 assume !(~n < 1); 5537#L10 assume !(1 == ~n); 5532#L13 call #t~ret7 := fibo(~n - 1);< 5534#fiboENTRY ~n := #in~n; 5535#L8 assume !(~n < 1); 5531#L10 assume !(1 == ~n); 5522#L13 call #t~ret7 := fibo(~n - 1);< 5528#fiboENTRY ~n := #in~n; 5530#L8 assume !(~n < 1); 5533#L10 assume !(1 == ~n); 5521#L13 call #t~ret7 := fibo(~n - 1);< 5528#fiboENTRY ~n := #in~n; 5530#L8 assume !(~n < 1); 5533#L10 assume !(1 == ~n); 5521#L13 call #t~ret7 := fibo(~n - 1);< 5528#fiboENTRY ~n := #in~n; 5529#L8 assume !(~n < 1); 5693#L10 assume 1 == ~n;#res := 1; 5692#fiboFINAL assume true; 5691#fiboEXIT >#33#return; 5520#L13-1 call #t~ret8 := fibo(~n - 2);< 5523#fiboENTRY ~n := #in~n; 5697#L8 assume ~n < 1;#res := 0; 5695#fiboFINAL assume true; 5696#fiboEXIT >#35#return; 5511#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 5656#fiboFINAL assume true; 5606#fiboEXIT >#33#return; 5481#L13-1 call #t~ret8 := fibo(~n - 2);< 5592#fiboENTRY ~n := #in~n; 5657#L8 assume !(~n < 1); 5601#L10 assume !(1 == ~n); 5525#L13 call #t~ret7 := fibo(~n - 1);< 5475#fiboENTRY ~n := #in~n; 5524#L8 assume !(~n < 1); 5527#L10 assume !(1 == ~n); 5551#L13 call #t~ret7 := fibo(~n - 1);< 5553#fiboENTRY [2021-10-13 00:00:33,438 INFO L793 eck$LassoCheckResult]: Loop: 5553#fiboENTRY ~n := #in~n; 5567#L8 assume !(~n < 1); 5566#L10 assume !(1 == ~n); 5552#L13 call #t~ret7 := fibo(~n - 1);< 5553#fiboENTRY [2021-10-13 00:00:33,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:33,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1767901880, now seen corresponding path program 4 times [2021-10-13 00:00:33,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:33,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207116567] [2021-10-13 00:00:33,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:33,439 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:33,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:33,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-10-13 00:00:33,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:33,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:00:33,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:33,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 00:00:33,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:33,653 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 61 proven. 91 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 00:00:33,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:33,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207116567] [2021-10-13 00:00:33,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207116567] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:33,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419182700] [2021-10-13 00:00:33,653 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 00:00:33,654 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:33,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:33,656 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:00:33,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-13 00:00:33,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 00:00:33,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:00:33,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 00:00:33,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:34,112 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 61 proven. 91 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 00:00:34,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419182700] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:34,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:00:34,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2021-10-13 00:00:34,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409577615] [2021-10-13 00:00:34,114 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-13 00:00:34,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:34,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1450956, now seen corresponding path program 2 times [2021-10-13 00:00:34,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:34,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409485335] [2021-10-13 00:00:34,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:34,116 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:34,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:00:34,122 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:00:34,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:00:34,124 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:00:34,179 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:00:34,179 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:00:34,179 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:00:34,179 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:00:34,179 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-13 00:00:34,180 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:34,180 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:00:34,180 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:00:34,180 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration7_Loop [2021-10-13 00:00:34,180 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:00:34,180 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:00:34,183 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:34,185 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:34,187 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:34,189 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:34,195 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:34,236 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:00:34,236 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-13 00:00:34,236 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:34,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:34,237 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:34,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2021-10-13 00:00:34,241 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:00:34,241 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:00:34,251 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:00:34,252 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:00:34,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:34,275 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:34,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:34,276 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:34,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2021-10-13 00:00:34,285 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:00:34,286 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:00:34,299 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:00:34,299 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:00:34,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Ended with exit code 0 [2021-10-13 00:00:34,319 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:34,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:34,322 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:34,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2021-10-13 00:00:34,323 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:00:34,324 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:00:34,332 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:00:34,332 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:00:34,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:34,355 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:34,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:34,356 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:34,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2021-10-13 00:00:34,358 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:00:34,358 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:00:34,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:34,400 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:34,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:34,402 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:34,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Waiting until timeout for monitored process [2021-10-13 00:00:34,403 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-13 00:00:34,403 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:00:34,440 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-13 00:00:34,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Ended with exit code 0 [2021-10-13 00:00:34,443 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:00:34,443 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:00:34,443 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:00:34,443 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:00:34,443 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-13 00:00:34,444 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:34,444 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:00:34,444 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:00:34,444 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration7_Loop [2021-10-13 00:00:34,444 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:00:34,444 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:00:34,445 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:34,446 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:34,448 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:34,450 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:34,451 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:34,506 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:00:34,506 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-13 00:00:34,506 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:34,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:34,511 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:34,521 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 [2021-10-13 00:00:34,530 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:00:34,530 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:00:34,530 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:00:34,530 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:00:34,530 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:00:34,531 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:00:34,531 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:00:34,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Waiting until timeout for monitored process [2021-10-13 00:00:34,547 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:00:34,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:34,580 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:34,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:34,588 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:34,592 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-13 00:00:34,601 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:00:34,601 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:00:34,601 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:00:34,601 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:00:34,601 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:00:34,602 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:00:34,602 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:00:34,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Waiting until timeout for monitored process [2021-10-13 00:00:34,623 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:00:34,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:34,660 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:34,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:34,664 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:34,671 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 [2021-10-13 00:00:34,680 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:00:34,680 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:00:34,680 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:00:34,680 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:00:34,681 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:00:34,681 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:00:34,682 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:00:34,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Waiting until timeout for monitored process [2021-10-13 00:00:34,691 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:00:34,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Ended with exit code 0 [2021-10-13 00:00:34,721 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:34,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:34,722 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:34,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Waiting until timeout for monitored process [2021-10-13 00:00:34,724 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 [2021-10-13 00:00:34,731 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:00:34,731 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:00:34,731 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:00:34,731 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:00:34,731 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:00:34,731 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:00:34,732 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:00:34,733 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:00:34,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:34,753 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:34,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:34,754 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:34,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Waiting until timeout for monitored process [2021-10-13 00:00:34,755 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 [2021-10-13 00:00:34,762 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:00:34,762 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:00:34,763 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:00:34,763 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:00:34,763 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:00:34,763 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:00:34,763 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:00:34,767 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-13 00:00:34,769 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-10-13 00:00:34,769 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-10-13 00:00:34,769 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:34,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:34,779 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:34,781 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-13 00:00:34,781 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-13 00:00:34,781 INFO L513 LassoAnalysis]: Proved termination. [2021-10-13 00:00:34,781 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2021-10-13 00:00:34,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Waiting until timeout for monitored process [2021-10-13 00:00:34,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:34,803 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-13 00:00:34,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:34,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:34,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 00:00:34,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:35,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:35,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 00:00:35,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:35,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:35,317 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 [2021-10-13 00:00:35,317 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 229 states and 293 transitions. cyclomatic complexity: 68 Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 00:00:35,374 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 229 states and 293 transitions. cyclomatic complexity: 68. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 245 states and 309 transitions. Complement of second has 13 states. [2021-10-13 00:00:35,375 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 [2021-10-13 00:00:35,375 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) [2021-10-13 00:00:35,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2021-10-13 00:00:35,376 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 49 letters. Loop has 4 letters. [2021-10-13 00:00:35,376 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:00:35,376 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-13 00:00:35,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:35,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:35,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 00:00:35,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:35,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:35,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:35,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 00:00:35,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:35,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:35,888 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 [2021-10-13 00:00:35,888 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 229 states and 293 transitions. cyclomatic complexity: 68 Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 00:00:35,947 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 229 states and 293 transitions. cyclomatic complexity: 68. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 245 states and 309 transitions. Complement of second has 13 states. [2021-10-13 00:00:35,947 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 [2021-10-13 00:00:35,947 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) [2021-10-13 00:00:35,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2021-10-13 00:00:35,948 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 49 letters. Loop has 4 letters. [2021-10-13 00:00:35,948 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:00:35,948 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-13 00:00:35,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:36,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:36,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 00:00:36,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:36,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:36,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 00:00:36,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:36,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:36,464 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 [2021-10-13 00:00:36,465 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 229 states and 293 transitions. cyclomatic complexity: 68 Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 00:00:36,533 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 229 states and 293 transitions. cyclomatic complexity: 68. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 306 states and 372 transitions. Complement of second has 14 states. [2021-10-13 00:00:36,534 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 [2021-10-13 00:00:36,534 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) [2021-10-13 00:00:36,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2021-10-13 00:00:36,535 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 49 letters. Loop has 4 letters. [2021-10-13 00:00:36,535 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:00:36,535 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 53 letters. Loop has 4 letters. [2021-10-13 00:00:36,536 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:00:36,536 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 49 letters. Loop has 8 letters. [2021-10-13 00:00:36,537 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:00:36,537 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 306 states and 372 transitions. [2021-10-13 00:00:36,542 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-13 00:00:36,546 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 306 states to 243 states and 308 transitions. [2021-10-13 00:00:36,547 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 100 [2021-10-13 00:00:36,547 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 103 [2021-10-13 00:00:36,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 243 states and 308 transitions. [2021-10-13 00:00:36,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 00:00:36,547 INFO L681 BuchiCegarLoop]: Abstraction has 243 states and 308 transitions. [2021-10-13 00:00:36,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states and 308 transitions. [2021-10-13 00:00:36,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 237. [2021-10-13 00:00:36,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 149 states have (on average 1.1140939597315436) internal successors, (166), 156 states have internal predecessors, (166), 54 states have call successors, (58), 30 states have call predecessors, (58), 34 states have return successors, (77), 50 states have call predecessors, (77), 48 states have call successors, (77) [2021-10-13 00:00:36,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 301 transitions. [2021-10-13 00:00:36,558 INFO L704 BuchiCegarLoop]: Abstraction has 237 states and 301 transitions. [2021-10-13 00:00:36,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:36,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 00:00:36,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-10-13 00:00:36,559 INFO L87 Difference]: Start difference. First operand 237 states and 301 transitions. Second operand has 18 states, 16 states have (on average 2.125) internal successors, (34), 12 states have internal predecessors, (34), 11 states have call successors, (12), 7 states have call predecessors, (12), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-13 00:00:36,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:36,858 INFO L93 Difference]: Finished difference Result 350 states and 452 transitions. [2021-10-13 00:00:36,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 00:00:36,859 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 350 states and 452 transitions. [2021-10-13 00:00:36,864 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-13 00:00:36,870 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 350 states to 337 states and 434 transitions. [2021-10-13 00:00:36,870 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 151 [2021-10-13 00:00:36,870 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 151 [2021-10-13 00:00:36,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 337 states and 434 transitions. [2021-10-13 00:00:36,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 00:00:36,875 INFO L681 BuchiCegarLoop]: Abstraction has 337 states and 434 transitions. [2021-10-13 00:00:36,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states and 434 transitions. [2021-10-13 00:00:36,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 298. [2021-10-13 00:00:36,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 185 states have (on average 1.0972972972972972) internal successors, (203), 195 states have internal predecessors, (203), 69 states have call successors, (73), 36 states have call predecessors, (73), 44 states have return successors, (103), 66 states have call predecessors, (103), 62 states have call successors, (103) [2021-10-13 00:00:36,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 379 transitions. [2021-10-13 00:00:36,893 INFO L704 BuchiCegarLoop]: Abstraction has 298 states and 379 transitions. [2021-10-13 00:00:36,893 INFO L587 BuchiCegarLoop]: Abstraction has 298 states and 379 transitions. [2021-10-13 00:00:36,893 INFO L425 BuchiCegarLoop]: ======== Iteration 8============ [2021-10-13 00:00:36,893 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 298 states and 379 transitions. [2021-10-13 00:00:36,896 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-13 00:00:36,896 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:00:36,896 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:00:36,898 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [12, 11, 10, 9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:36,898 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-13 00:00:36,899 INFO L791 eck$LassoCheckResult]: Stem: 7841#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 7842#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 7860#L27 call main_#t~ret9 := fibo(main_~x~0);< 7861#fiboENTRY ~n := #in~n; 8035#L8 assume !(~n < 1); 7919#L10 assume !(1 == ~n); 7915#L13 call #t~ret7 := fibo(~n - 1);< 7938#fiboENTRY ~n := #in~n; 7922#L8 assume !(~n < 1); 7923#L10 assume !(1 == ~n); 7914#L13 call #t~ret7 := fibo(~n - 1);< 7916#fiboENTRY ~n := #in~n; 8034#L8 assume !(~n < 1); 8033#L10 assume !(1 == ~n); 7930#L13 call #t~ret7 := fibo(~n - 1);< 7937#fiboENTRY ~n := #in~n; 7962#L8 assume !(~n < 1); 7954#L10 assume !(1 == ~n); 7926#L13 call #t~ret7 := fibo(~n - 1);< 7935#fiboENTRY ~n := #in~n; 7983#L8 assume !(~n < 1); 7982#L10 assume !(1 == ~n); 7944#L13 call #t~ret7 := fibo(~n - 1);< 7957#fiboENTRY ~n := #in~n; 7978#L8 assume !(~n < 1); 7976#L10 assume !(1 == ~n); 7947#L13 call #t~ret7 := fibo(~n - 1);< 7957#fiboENTRY ~n := #in~n; 7978#L8 assume !(~n < 1); 7976#L10 assume !(1 == ~n); 7947#L13 call #t~ret7 := fibo(~n - 1);< 7957#fiboENTRY ~n := #in~n; 7981#L8 assume !(~n < 1); 8032#L10 assume 1 == ~n;#res := 1; 8031#fiboFINAL assume true; 8029#fiboEXIT >#33#return; 8026#L13-1 call #t~ret8 := fibo(~n - 2);< 8027#fiboENTRY ~n := #in~n; 8030#L8 assume ~n < 1;#res := 0; 8028#fiboFINAL assume true; 8025#fiboEXIT >#35#return; 8024#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 8023#fiboFINAL assume true; 8020#fiboEXIT >#33#return; 7946#L13-1 call #t~ret8 := fibo(~n - 2);< 7951#fiboENTRY ~n := #in~n; 8019#L8 assume !(~n < 1); 8015#L10 assume !(1 == ~n); 7897#L13 call #t~ret7 := fibo(~n - 1);< 7988#fiboENTRY ~n := #in~n; 8072#L8 assume !(~n < 1); 8069#L10 assume !(1 == ~n); 7850#L13 call #t~ret7 := fibo(~n - 1);< 7903#fiboENTRY ~n := #in~n; 7881#L8 assume !(~n < 1); 7882#L10 assume !(1 == ~n); 7852#L13 [2021-10-13 00:00:36,900 INFO L793 eck$LassoCheckResult]: Loop: 7852#L13 call #t~ret7 := fibo(~n - 1);< 7903#fiboENTRY ~n := #in~n; 7881#L8 assume !(~n < 1); 7882#L10 assume !(1 == ~n); 7852#L13 [2021-10-13 00:00:36,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:36,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1933126850, now seen corresponding path program 5 times [2021-10-13 00:00:36,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:36,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603639143] [2021-10-13 00:00:36,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:36,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:36,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:37,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-10-13 00:00:37,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:37,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:00:37,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:37,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 00:00:37,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:37,119 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 95 proven. 120 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 00:00:37,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:37,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603639143] [2021-10-13 00:00:37,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603639143] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:37,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306260582] [2021-10-13 00:00:37,120 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 00:00:37,121 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:37,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:37,122 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:00:37,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-10-13 00:00:37,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-10-13 00:00:37,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:00:37,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 00:00:37,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:37,733 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 127 proven. 11 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-10-13 00:00:37,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306260582] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:37,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:00:37,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 8] total 24 [2021-10-13 00:00:37,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789716697] [2021-10-13 00:00:37,735 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-13 00:00:37,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:37,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1893846, now seen corresponding path program 3 times [2021-10-13 00:00:37,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:37,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729689037] [2021-10-13 00:00:37,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:37,736 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:37,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:00:37,745 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:00:37,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:00:37,748 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:00:37,825 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:00:37,826 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:00:37,826 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:00:37,826 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:00:37,826 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-13 00:00:37,826 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:37,826 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:00:37,826 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:00:37,826 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration8_Loop [2021-10-13 00:00:37,826 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:00:37,827 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:00:37,827 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:37,829 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:37,831 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:37,839 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:37,885 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:00:37,885 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-13 00:00:37,885 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:37,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:37,887 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:37,895 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:00:37,895 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:00:37,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Waiting until timeout for monitored process [2021-10-13 00:00:37,919 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:00:37,919 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:00:37,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:37,938 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:37,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:37,939 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:37,949 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:00:37,949 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:00:37,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Waiting until timeout for monitored process [2021-10-13 00:00:37,979 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:00:37,980 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:00:38,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:38,013 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:38,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:38,016 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:38,018 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:00:38,018 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:00:38,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Waiting until timeout for monitored process [2021-10-13 00:00:38,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:38,084 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:38,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:38,085 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:38,088 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-13 00:00:38,088 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:00:38,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Waiting until timeout for monitored process [2021-10-13 00:00:40,502 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-13 00:00:40,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:40,506 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:00:40,506 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:00:40,506 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:00:40,506 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:00:40,506 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-13 00:00:40,506 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:40,506 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:00:40,506 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:00:40,506 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration8_Loop [2021-10-13 00:00:40,506 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:00:40,506 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:00:40,507 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:40,509 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:40,510 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:40,516 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:40,559 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:00:40,559 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-13 00:00:40,559 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:40,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:40,561 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:40,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Waiting until timeout for monitored process [2021-10-13 00:00:40,564 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 [2021-10-13 00:00:40,571 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:00:40,571 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:00:40,571 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:00:40,572 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:00:40,572 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:00:40,572 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:00:40,572 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:00:40,573 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:00:40,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:40,594 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:40,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:40,595 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:40,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Waiting until timeout for monitored process [2021-10-13 00:00:40,598 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 [2021-10-13 00:00:40,606 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:00:40,606 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:00:40,606 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:00:40,607 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:00:40,607 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:00:40,607 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:00:40,607 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:00:40,608 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:00:40,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:40,628 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:40,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:40,629 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:40,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Waiting until timeout for monitored process [2021-10-13 00:00:40,631 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 [2021-10-13 00:00:40,639 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:00:40,639 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:00:40,639 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:00:40,639 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:00:40,639 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:00:40,641 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:00:40,641 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:00:40,643 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-13 00:00:40,646 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-13 00:00:40,646 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-13 00:00:40,647 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:40,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:40,648 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:40,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Waiting until timeout for monitored process [2021-10-13 00:00:40,649 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-13 00:00:40,649 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-13 00:00:40,649 INFO L513 LassoAnalysis]: Proved termination. [2021-10-13 00:00:40,649 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2021-10-13 00:00:40,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Ended with exit code 0 [2021-10-13 00:00:40,669 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-13 00:00:40,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:40,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:40,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-13 00:00:40,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:41,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:41,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 00:00:41,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:41,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:41,205 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2021-10-13 00:00:41,205 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 298 states and 379 transitions. cyclomatic complexity: 85 Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 00:00:41,256 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 298 states and 379 transitions. cyclomatic complexity: 85. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 316 states and 398 transitions. Complement of second has 18 states. [2021-10-13 00:00:41,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2021-10-13 00:00:41,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 00:00:41,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2021-10-13 00:00:41,258 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 56 letters. Loop has 4 letters. [2021-10-13 00:00:41,259 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:00:41,259 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-13 00:00:41,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:41,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:41,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-13 00:00:41,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:41,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:41,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:41,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 00:00:41,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:41,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:41,857 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2021-10-13 00:00:41,857 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 298 states and 379 transitions. cyclomatic complexity: 85 Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 00:00:41,935 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 298 states and 379 transitions. cyclomatic complexity: 85. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 322 states and 404 transitions. Complement of second has 17 states. [2021-10-13 00:00:41,936 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 [2021-10-13 00:00:41,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 00:00:41,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2021-10-13 00:00:41,937 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 56 letters. Loop has 4 letters. [2021-10-13 00:00:41,937 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:00:41,937 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-13 00:00:41,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:42,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:42,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-13 00:00:42,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:42,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:42,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 00:00:42,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:42,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:42,514 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2021-10-13 00:00:42,515 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 298 states and 379 transitions. cyclomatic complexity: 85 Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 00:00:42,579 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 298 states and 379 transitions. cyclomatic complexity: 85. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 394 states and 497 transitions. Complement of second has 27 states. [2021-10-13 00:00:42,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2021-10-13 00:00:42,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 00:00:42,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2021-10-13 00:00:42,581 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 56 letters. Loop has 4 letters. [2021-10-13 00:00:42,582 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:00:42,582 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 60 letters. Loop has 4 letters. [2021-10-13 00:00:42,582 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:00:42,583 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 56 letters. Loop has 8 letters. [2021-10-13 00:00:42,585 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:00:42,585 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 394 states and 497 transitions. [2021-10-13 00:00:42,591 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-13 00:00:42,596 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 394 states to 298 states and 379 transitions. [2021-10-13 00:00:42,597 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 113 [2021-10-13 00:00:42,597 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 124 [2021-10-13 00:00:42,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 298 states and 379 transitions. [2021-10-13 00:00:42,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 00:00:42,597 INFO L681 BuchiCegarLoop]: Abstraction has 298 states and 379 transitions. [2021-10-13 00:00:42,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states and 379 transitions. [2021-10-13 00:00:42,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2021-10-13 00:00:42,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 185 states have (on average 1.0972972972972972) internal successors, (203), 195 states have internal predecessors, (203), 69 states have call successors, (73), 36 states have call predecessors, (73), 44 states have return successors, (103), 66 states have call predecessors, (103), 62 states have call successors, (103) [2021-10-13 00:00:42,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 379 transitions. [2021-10-13 00:00:42,609 INFO L704 BuchiCegarLoop]: Abstraction has 298 states and 379 transitions. [2021-10-13 00:00:42,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:42,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 00:00:42,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-10-13 00:00:42,611 INFO L87 Difference]: Start difference. First operand 298 states and 379 transitions. Second operand has 24 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 16 states have internal predecessors, (44), 13 states have call successors, (15), 9 states have call predecessors, (15), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-13 00:00:43,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:43,416 INFO L93 Difference]: Finished difference Result 827 states and 1538 transitions. [2021-10-13 00:00:43,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 00:00:43,417 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 827 states and 1538 transitions. [2021-10-13 00:00:43,451 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-13 00:00:43,472 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 827 states to 748 states and 1441 transitions. [2021-10-13 00:00:43,472 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 244 [2021-10-13 00:00:43,472 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 254 [2021-10-13 00:00:43,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 748 states and 1441 transitions. [2021-10-13 00:00:43,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 00:00:43,473 INFO L681 BuchiCegarLoop]: Abstraction has 748 states and 1441 transitions. [2021-10-13 00:00:43,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states and 1441 transitions. [2021-10-13 00:00:43,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 637. [2021-10-13 00:00:43,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 372 states have (on average 1.0672043010752688) internal successors, (397), 383 states have internal predecessors, (397), 170 states have call successors, (174), 66 states have call predecessors, (174), 95 states have return successors, (587), 187 states have call predecessors, (587), 158 states have call successors, (587) [2021-10-13 00:00:43,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1158 transitions. [2021-10-13 00:00:43,510 INFO L704 BuchiCegarLoop]: Abstraction has 637 states and 1158 transitions. [2021-10-13 00:00:43,510 INFO L587 BuchiCegarLoop]: Abstraction has 637 states and 1158 transitions. [2021-10-13 00:00:43,510 INFO L425 BuchiCegarLoop]: ======== Iteration 9============ [2021-10-13 00:00:43,510 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 637 states and 1158 transitions. [2021-10-13 00:00:43,516 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-13 00:00:43,516 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:00:43,516 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:00:43,517 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [15, 14, 12, 11, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2021-10-13 00:00:43,518 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-13 00:00:43,518 INFO L791 eck$LassoCheckResult]: Stem: 11182#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 11183#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 11246#L27 call main_#t~ret9 := fibo(main_~x~0);< 11247#fiboENTRY ~n := #in~n; 11521#L8 assume !(~n < 1); 11509#L10 assume !(1 == ~n); 11505#L13 call #t~ret7 := fibo(~n - 1);< 11506#fiboENTRY ~n := #in~n; 11612#L8 assume !(~n < 1); 11608#L10 assume !(1 == ~n); 11350#L13 call #t~ret7 := fibo(~n - 1);< 11606#fiboENTRY ~n := #in~n; 11626#L8 assume !(~n < 1); 11625#L10 assume !(1 == ~n); 11207#L13 call #t~ret7 := fibo(~n - 1);< 11355#fiboENTRY ~n := #in~n; 11473#L8 assume !(~n < 1); 11352#L10 assume !(1 == ~n); 11334#L13 call #t~ret7 := fibo(~n - 1);< 11346#fiboENTRY ~n := #in~n; 11358#L8 assume !(~n < 1); 11356#L10 assume !(1 == ~n); 11279#L13 call #t~ret7 := fibo(~n - 1);< 11348#fiboENTRY ~n := #in~n; 11405#L8 assume !(~n < 1); 11403#L10 assume !(1 == ~n); 11284#L13 call #t~ret7 := fibo(~n - 1);< 11347#fiboENTRY ~n := #in~n; 11603#L8 assume !(~n < 1); 11602#L10 assume !(1 == ~n); 11256#L13 call #t~ret7 := fibo(~n - 1);< 11347#fiboENTRY ~n := #in~n; 11603#L8 assume !(~n < 1); 11602#L10 assume !(1 == ~n); 11256#L13 call #t~ret7 := fibo(~n - 1);< 11347#fiboENTRY ~n := #in~n; 11603#L8 assume !(~n < 1); 11602#L10 assume !(1 == ~n); 11256#L13 call #t~ret7 := fibo(~n - 1);< 11347#fiboENTRY ~n := #in~n; 11604#L8 assume !(~n < 1); 11628#L10 assume 1 == ~n;#res := 1; 11627#fiboFINAL assume true; 11624#fiboEXIT >#33#return; 11618#L13-1 call #t~ret8 := fibo(~n - 2);< 11619#fiboENTRY ~n := #in~n; 11622#L8 assume ~n < 1;#res := 0; 11620#fiboFINAL assume true; 11617#fiboEXIT >#35#return; 11616#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 11611#fiboFINAL assume true; 11607#fiboEXIT >#33#return; 11417#L13-1 call #t~ret8 := fibo(~n - 2);< 11420#fiboENTRY ~n := #in~n; 11601#L8 assume !(~n < 1); 11600#L10 assume 1 == ~n;#res := 1; 11407#fiboFINAL assume true; 11416#fiboEXIT >#35#return; 11414#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 11413#fiboFINAL assume true; 11341#fiboEXIT >#33#return; 11271#L13-1 call #t~ret8 := fibo(~n - 2);< 11364#fiboENTRY ~n := #in~n; 11409#L8 assume !(~n < 1); 11406#L10 assume !(1 == ~n); 11397#L13 call #t~ret7 := fibo(~n - 1);< 11398#fiboENTRY ~n := #in~n; 11476#L8 assume !(~n < 1); 11688#L10 assume !(1 == ~n); 11306#L13 call #t~ret7 := fibo(~n - 1);< 11302#fiboENTRY ~n := #in~n; 11309#L8 assume !(~n < 1); 11701#L10 assume !(1 == ~n); 11303#L13 [2021-10-13 00:00:43,518 INFO L793 eck$LassoCheckResult]: Loop: 11303#L13 call #t~ret7 := fibo(~n - 1);< 11302#fiboENTRY ~n := #in~n; 11309#L8 assume !(~n < 1); 11701#L10 assume !(1 == ~n); 11303#L13 [2021-10-13 00:00:43,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:43,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1085253002, now seen corresponding path program 6 times [2021-10-13 00:00:43,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:43,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815411138] [2021-10-13 00:00:43,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:43,520 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:43,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:43,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-10-13 00:00:43,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:43,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:00:43,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:43,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:00:43,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:43,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 00:00:43,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:43,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-10-13 00:00:43,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 219 proven. 112 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-13 00:00:43,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:43,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815411138] [2021-10-13 00:00:43,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815411138] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:43,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039247319] [2021-10-13 00:00:43,786 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 00:00:43,786 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:43,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:43,787 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:00:43,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-10-13 00:00:44,360 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-10-13 00:00:44,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:00:44,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 00:00:44,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:44,645 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 219 proven. 112 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-13 00:00:44,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039247319] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:44,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:00:44,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 24 [2021-10-13 00:00:44,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001392007] [2021-10-13 00:00:44,647 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-13 00:00:44,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:44,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1893846, now seen corresponding path program 4 times [2021-10-13 00:00:44,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:44,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088629746] [2021-10-13 00:00:44,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:44,648 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:44,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:00:44,660 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:00:44,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:00:44,662 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:00:44,713 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:00:44,713 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:00:44,713 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:00:44,713 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:00:44,713 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-13 00:00:44,713 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:44,713 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:00:44,714 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:00:44,714 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration9_Loop [2021-10-13 00:00:44,714 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:00:44,714 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:00:44,715 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:44,722 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:44,724 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:44,726 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:44,762 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:00:44,763 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-13 00:00:44,763 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:44,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:44,764 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:44,772 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:00:44,772 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:00:44,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Waiting until timeout for monitored process [2021-10-13 00:00:44,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:44,832 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:44,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:44,833 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:44,835 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-13 00:00:44,835 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:00:44,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Waiting until timeout for monitored process [2021-10-13 00:00:47,346 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-13 00:00:47,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Ended with exit code 0 [2021-10-13 00:00:47,349 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:00:47,349 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:00:47,349 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:00:47,349 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:00:47,349 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-13 00:00:47,349 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:47,349 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:00:47,350 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:00:47,350 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration9_Loop [2021-10-13 00:00:47,350 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:00:47,350 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:00:47,350 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:47,352 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:47,357 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:47,358 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:00:47,396 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:00:47,396 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-13 00:00:47,396 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:47,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:47,397 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:47,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (56)] Waiting until timeout for monitored process [2021-10-13 00:00:47,398 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 [2021-10-13 00:00:47,405 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:00:47,405 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:00:47,405 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:00:47,405 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:00:47,405 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:00:47,406 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:00:47,406 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:00:47,407 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:00:47,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (56)] Ended with exit code 0 [2021-10-13 00:00:47,427 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:47,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:47,428 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:47,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (57)] Waiting until timeout for monitored process [2021-10-13 00:00:47,434 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 [2021-10-13 00:00:47,441 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:00:47,442 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:00:47,442 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:00:47,442 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:00:47,442 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:00:47,442 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:00:47,442 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:00:47,443 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:00:47,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (57)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:47,464 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:47,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:47,465 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:47,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (58)] Waiting until timeout for monitored process [2021-10-13 00:00:47,480 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 [2021-10-13 00:00:47,487 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:00:47,487 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:00:47,487 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:00:47,487 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:00:47,488 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:00:47,488 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:00:47,488 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:00:47,489 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:00:47,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (58)] Ended with exit code 0 [2021-10-13 00:00:47,509 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:47,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:47,510 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:47,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (59)] Waiting until timeout for monitored process [2021-10-13 00:00:47,511 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 [2021-10-13 00:00:47,518 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:00:47,518 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:00:47,519 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:00:47,519 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:00:47,519 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:00:47,520 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:00:47,520 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:00:47,522 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-13 00:00:47,526 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-13 00:00:47,526 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-13 00:00:47,526 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:00:47,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:47,527 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:00:47,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (60)] Waiting until timeout for monitored process [2021-10-13 00:00:47,528 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-13 00:00:47,528 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-13 00:00:47,528 INFO L513 LassoAnalysis]: Proved termination. [2021-10-13 00:00:47,528 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2021-10-13 00:00:47,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (59)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:47,549 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-13 00:00:47,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:47,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:47,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-13 00:00:47,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:48,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (60)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:48,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:48,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 00:00:48,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:48,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:48,370 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2021-10-13 00:00:48,371 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 637 states and 1158 transitions. cyclomatic complexity: 525 Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 00:00:48,433 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 637 states and 1158 transitions. cyclomatic complexity: 525. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 658 states and 1180 transitions. Complement of second has 18 states. [2021-10-13 00:00:48,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2021-10-13 00:00:48,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 00:00:48,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2021-10-13 00:00:48,435 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 73 letters. Loop has 4 letters. [2021-10-13 00:00:48,435 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:00:48,435 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-13 00:00:48,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:48,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:48,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-13 00:00:48,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:49,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:49,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 00:00:49,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:49,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:49,264 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2021-10-13 00:00:49,265 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 637 states and 1158 transitions. cyclomatic complexity: 525 Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 00:00:49,348 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 637 states and 1158 transitions. cyclomatic complexity: 525. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 664 states and 1186 transitions. Complement of second has 17 states. [2021-10-13 00:00:49,348 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 [2021-10-13 00:00:49,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 00:00:49,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2021-10-13 00:00:49,349 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 73 letters. Loop has 4 letters. [2021-10-13 00:00:49,350 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:00:49,350 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-13 00:00:49,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:49,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:49,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-13 00:00:49,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:50,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:50,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 00:00:50,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:50,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:50,173 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2021-10-13 00:00:50,173 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 637 states and 1158 transitions. cyclomatic complexity: 525 Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 00:00:50,240 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 637 states and 1158 transitions. cyclomatic complexity: 525. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 777 states and 1342 transitions. Complement of second has 27 states. [2021-10-13 00:00:50,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2021-10-13 00:00:50,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 00:00:50,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2021-10-13 00:00:50,242 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 73 letters. Loop has 4 letters. [2021-10-13 00:00:50,243 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:00:50,243 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 77 letters. Loop has 4 letters. [2021-10-13 00:00:50,243 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:00:50,243 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 73 letters. Loop has 8 letters. [2021-10-13 00:00:50,244 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:00:50,244 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 777 states and 1342 transitions. [2021-10-13 00:00:50,257 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-13 00:00:50,272 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 777 states to 637 states and 1158 transitions. [2021-10-13 00:00:50,272 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 199 [2021-10-13 00:00:50,272 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 210 [2021-10-13 00:00:50,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 637 states and 1158 transitions. [2021-10-13 00:00:50,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 00:00:50,273 INFO L681 BuchiCegarLoop]: Abstraction has 637 states and 1158 transitions. [2021-10-13 00:00:50,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states and 1158 transitions. [2021-10-13 00:00:50,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 637. [2021-10-13 00:00:50,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 372 states have (on average 1.0672043010752688) internal successors, (397), 383 states have internal predecessors, (397), 170 states have call successors, (174), 66 states have call predecessors, (174), 95 states have return successors, (587), 187 states have call predecessors, (587), 158 states have call successors, (587) [2021-10-13 00:00:50,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1158 transitions. [2021-10-13 00:00:50,304 INFO L704 BuchiCegarLoop]: Abstraction has 637 states and 1158 transitions. [2021-10-13 00:00:50,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:50,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 00:00:50,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2021-10-13 00:00:50,306 INFO L87 Difference]: Start difference. First operand 637 states and 1158 transitions. Second operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 14 states have internal predecessors, (43), 12 states have call successors, (14), 12 states have call predecessors, (14), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 00:00:50,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:50,724 INFO L93 Difference]: Finished difference Result 507 states and 606 transitions. [2021-10-13 00:00:50,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-13 00:00:50,725 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 507 states and 606 transitions. [2021-10-13 00:00:50,752 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-13 00:00:50,753 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 507 states to 0 states and 0 transitions. [2021-10-13 00:00:50,753 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-10-13 00:00:50,753 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-10-13 00:00:50,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-10-13 00:00:50,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 00:00:50,753 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 00:00:50,753 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 00:00:50,753 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 00:00:50,754 INFO L425 BuchiCegarLoop]: ======== Iteration 10============ [2021-10-13 00:00:50,754 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-10-13 00:00:50,754 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-13 00:00:50,754 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-10-13 00:00:50,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 13.10 12:00:50 BoogieIcfgContainer [2021-10-13 00:00:50,760 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-10-13 00:00:50,760 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 00:00:50,760 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 00:00:50,761 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 00:00:50,761 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:00:20" (3/4) ... [2021-10-13 00:00:50,764 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 00:00:50,764 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 00:00:50,766 INFO L168 Benchmark]: Toolchain (without parser) took 30383.53 ms. Allocated memory was 102.8 MB in the beginning and 218.1 MB in the end (delta: 115.3 MB). Free memory was 62.4 MB in the beginning and 127.1 MB in the end (delta: -64.7 MB). Peak memory consumption was 51.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:00:50,766 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 102.8 MB. Free memory is still 78.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:00:50,767 INFO L168 Benchmark]: CACSL2BoogieTranslator took 236.42 ms. Allocated memory is still 102.8 MB. Free memory was 62.2 MB in the beginning and 78.3 MB in the end (delta: -16.1 MB). Peak memory consumption was 10.3 MB. Max. memory is 16.1 GB. [2021-10-13 00:00:50,767 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.26 ms. Allocated memory is still 102.8 MB. Free memory was 78.3 MB in the beginning and 76.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:00:50,767 INFO L168 Benchmark]: Boogie Preprocessor took 18.96 ms. Allocated memory is still 102.8 MB. Free memory was 76.8 MB in the beginning and 76.0 MB in the end (delta: 857.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:00:50,768 INFO L168 Benchmark]: RCFGBuilder took 317.68 ms. Allocated memory is still 102.8 MB. Free memory was 76.0 MB in the beginning and 67.2 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 00:00:50,768 INFO L168 Benchmark]: BuchiAutomizer took 29766.72 ms. Allocated memory was 102.8 MB in the beginning and 218.1 MB in the end (delta: 115.3 MB). Free memory was 67.0 MB in the beginning and 128.2 MB in the end (delta: -61.1 MB). Peak memory consumption was 57.4 MB. Max. memory is 16.1 GB. [2021-10-13 00:00:50,768 INFO L168 Benchmark]: Witness Printer took 3.86 ms. Allocated memory is still 218.1 MB. Free memory was 128.2 MB in the beginning and 127.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:00:50,770 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 102.8 MB. Free memory is still 78.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 236.42 ms. Allocated memory is still 102.8 MB. Free memory was 62.2 MB in the beginning and 78.3 MB in the end (delta: -16.1 MB). Peak memory consumption was 10.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.26 ms. Allocated memory is still 102.8 MB. Free memory was 78.3 MB in the beginning and 76.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.96 ms. Allocated memory is still 102.8 MB. Free memory was 76.8 MB in the beginning and 76.0 MB in the end (delta: 857.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 317.68 ms. Allocated memory is still 102.8 MB. Free memory was 76.0 MB in the beginning and 67.2 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 29766.72 ms. Allocated memory was 102.8 MB in the beginning and 218.1 MB in the end (delta: 115.3 MB). Free memory was 67.0 MB in the beginning and 128.2 MB in the end (delta: -61.1 MB). Peak memory consumption was 57.4 MB. Max. memory is 16.1 GB. * Witness Printer took 3.86 ms. Allocated memory is still 218.1 MB. Free memory was 128.2 MB in the beginning and 127.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 14 terminating modules (8 trivial, 2 deterministic, 4 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 9 locations. One nondeterministic module has affine ranking function n and consists of 10 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. 8 modules have a trivial ranking function, the largest among these consists of 24 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 29.7s and 10 iterations. TraceHistogramMax:15. Analysis of lassos took 16.5s. Construction of modules took 1.7s. Büchi inclusion checks took 10.5s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 13. Automata minimization 274.4ms AutomataMinimizationTime, 13 MinimizatonAttempts, 394 StatesRemovedByMinimization, 8 NontrivialMinimizations. Non-live state removal took 0.2s Buchi closure took 0.0s. Biggest automaton had 637 states and ocurred in iteration 8. Nontrivial modules had stage [2, 0, 4, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 8/26 HoareTripleCheckerStatistics: 314 SDtfs, 757 SDslu, 649 SDs, 0 SdLazy, 2480 SolverSat, 748 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1779.6ms Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI3 SILT5 lasso0 LassoPreprocessingBenchmarks: Lassos: inital17 mio100 ax100 hnf97 lsp95 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq181 hnf93 smp75 dnf100 smp100 tf109 neg96 sie109 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 51ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 11 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 6 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 8.2s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-10-13 00:00:50,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:51,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-10-13 00:00:51,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-10-13 00:00:51,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:51,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:51,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:52,025 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-10-13 00:00:52,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-10-13 00:00:52,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-10-13 00:00:52,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88baf1f9-4b9d-48b4-984c-a693f0e8c46c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...