./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_7-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_7-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa --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 40add90db9f8d501baba3978de407d6383e788a1a5fafc7225d7676b58d18c84 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 01:40:37,491 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 01:40:37,493 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 01:40:37,522 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 01:40:37,523 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 01:40:37,524 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 01:40:37,526 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 01:40:37,528 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 01:40:37,530 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 01:40:37,531 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 01:40:37,532 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 01:40:37,533 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 01:40:37,534 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 01:40:37,535 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 01:40:37,536 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 01:40:37,538 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 01:40:37,539 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 01:40:37,540 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 01:40:37,542 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 01:40:37,544 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 01:40:37,546 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 01:40:37,548 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 01:40:37,549 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 01:40:37,550 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 01:40:37,553 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 01:40:37,554 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 01:40:37,554 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 01:40:37,555 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 01:40:37,556 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 01:40:37,557 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 01:40:37,557 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 01:40:37,558 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 01:40:37,559 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 01:40:37,560 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 01:40:37,561 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 01:40:37,561 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 01:40:37,562 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 01:40:37,562 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 01:40:37,562 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 01:40:37,563 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 01:40:37,563 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 01:40:37,564 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-12-07 01:40:37,582 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 01:40:37,583 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 01:40:37,583 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 01:40:37,583 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 01:40:37,584 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 01:40:37,584 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 01:40:37,584 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 01:40:37,584 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-12-07 01:40:37,584 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-12-07 01:40:37,584 INFO L138 SettingsManager]: * Use old map elimination=false [2021-12-07 01:40:37,585 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-12-07 01:40:37,585 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-12-07 01:40:37,585 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-12-07 01:40:37,585 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 01:40:37,585 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 01:40:37,585 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-07 01:40:37,585 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 01:40:37,586 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 01:40:37,586 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 01:40:37,586 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-12-07 01:40:37,586 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-12-07 01:40:37,586 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-12-07 01:40:37,586 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 01:40:37,586 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 01:40:37,586 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-12-07 01:40:37,586 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 01:40:37,587 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-12-07 01:40:37,587 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 01:40:37,587 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 01:40:37,587 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 01:40:37,587 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 01:40:37,587 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 01:40:37,588 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-12-07 01:40:37,588 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_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 40add90db9f8d501baba3978de407d6383e788a1a5fafc7225d7676b58d18c84 [2021-12-07 01:40:37,776 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 01:40:37,796 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 01:40:37,798 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 01:40:37,799 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 01:40:37,800 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 01:40:37,801 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/recursive-simple/fibo_7-2.c [2021-12-07 01:40:37,844 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/data/23e8c31f7/d6a59a29deb54a299d5ff4087d027839/FLAGb1ea95f4a [2021-12-07 01:40:38,222 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 01:40:38,222 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/sv-benchmarks/c/recursive-simple/fibo_7-2.c [2021-12-07 01:40:38,227 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/data/23e8c31f7/d6a59a29deb54a299d5ff4087d027839/FLAGb1ea95f4a [2021-12-07 01:40:38,239 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/data/23e8c31f7/d6a59a29deb54a299d5ff4087d027839 [2021-12-07 01:40:38,242 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 01:40:38,243 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 01:40:38,245 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 01:40:38,245 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 01:40:38,248 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 01:40:38,248 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:40:38" (1/1) ... [2021-12-07 01:40:38,249 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@663c066 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:40:38, skipping insertion in model container [2021-12-07 01:40:38,249 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:40:38" (1/1) ... [2021-12-07 01:40:38,254 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 01:40:38,263 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 01:40:38,376 WARN L230 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_bf2c6bf3-5891-4e67-9230-326dab70b475/sv-benchmarks/c/recursive-simple/fibo_7-2.c[741,754] [2021-12-07 01:40:38,377 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:40:38,383 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 01:40:38,393 WARN L230 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_bf2c6bf3-5891-4e67-9230-326dab70b475/sv-benchmarks/c/recursive-simple/fibo_7-2.c[741,754] [2021-12-07 01:40:38,393 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:40:38,403 INFO L208 MainTranslator]: Completed translation [2021-12-07 01:40:38,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:40:38 WrapperNode [2021-12-07 01:40:38,403 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 01:40:38,404 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 01:40:38,404 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 01:40:38,404 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 01:40:38,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:40:38" (1/1) ... [2021-12-07 01:40:38,415 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:40:38" (1/1) ... [2021-12-07 01:40:38,427 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2021-12-07 01:40:38,427 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 01:40:38,427 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 01:40:38,427 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 01:40:38,428 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 01:40:38,433 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:40:38" (1/1) ... [2021-12-07 01:40:38,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:40:38" (1/1) ... [2021-12-07 01:40:38,434 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:40:38" (1/1) ... [2021-12-07 01:40:38,434 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:40:38" (1/1) ... [2021-12-07 01:40:38,436 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:40:38" (1/1) ... [2021-12-07 01:40:38,437 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:40:38" (1/1) ... [2021-12-07 01:40:38,438 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:40:38" (1/1) ... [2021-12-07 01:40:38,439 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 01:40:38,440 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 01:40:38,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 01:40:38,440 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 01:40:38,441 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:40:38" (1/1) ... [2021-12-07 01:40:38,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-07 01:40:38,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:38,465 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-07 01:40:38,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-12-07 01:40:38,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 01:40:38,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 01:40:38,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 01:40:38,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 01:40:38,495 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2021-12-07 01:40:38,495 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2021-12-07 01:40:38,540 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 01:40:38,541 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 01:40:38,601 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 01:40:38,607 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 01:40:38,607 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-07 01:40:38,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:40:38 BoogieIcfgContainer [2021-12-07 01:40:38,609 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 01:40:38,610 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-12-07 01:40:38,610 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-12-07 01:40:38,613 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-12-07 01:40:38,614 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-07 01:40:38,614 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 07.12 01:40:38" (1/3) ... [2021-12-07 01:40:38,615 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@27be44e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 07.12 01:40:38, skipping insertion in model container [2021-12-07 01:40:38,615 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-07 01:40:38,616 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:40:38" (2/3) ... [2021-12-07 01:40:38,616 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@27be44e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 07.12 01:40:38, skipping insertion in model container [2021-12-07 01:40:38,616 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-07 01:40:38,616 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:40:38" (3/3) ... [2021-12-07 01:40:38,618 INFO L388 chiAutomizerObserver]: Analyzing ICFG fibo_7-2.c [2021-12-07 01:40:38,651 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-12-07 01:40:38,651 INFO L360 BuchiCegarLoop]: Hoare is false [2021-12-07 01:40:38,651 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-12-07 01:40:38,652 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-12-07 01:40:38,652 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-12-07 01:40:38,652 INFO L364 BuchiCegarLoop]: Difference is false [2021-12-07 01:40:38,652 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-12-07 01:40:38,652 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-12-07 01:40:38,663 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) [2021-12-07 01:40:38,684 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-07 01:40:38,685 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-07 01:40:38,685 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-07 01:40:38,690 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-12-07 01:40:38,690 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-12-07 01:40:38,691 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-12-07 01:40:38,691 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) [2021-12-07 01:40:38,694 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-07 01:40:38,695 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-07 01:40:38,695 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-07 01:40:38,695 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-12-07 01:40:38,695 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-12-07 01:40:38,701 INFO L791 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(11, 2);call #Ultimate.allocInit(12, 3); 13#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 7; 6#L27true call main_#t~ret6#1 := fibo(main_~x~0#1);< 7#fiboENTRYtrue [2021-12-07 01:40:38,701 INFO L793 eck$LassoCheckResult]: Loop: 7#fiboENTRYtrue ~n := #in~n; 8#L8true assume !(~n < 1); 10#L10true assume !(1 == ~n); 15#L13true call #t~ret4 := fibo(~n - 1);< 7#fiboENTRYtrue [2021-12-07 01:40:38,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:40:38,707 INFO L85 PathProgramCache]: Analyzing trace with hash 29883, now seen corresponding path program 1 times [2021-12-07 01:40:38,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:40:38,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369679677] [2021-12-07 01:40:38,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:40:38,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:40:38,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-07 01:40:38,807 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-07 01:40:38,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-07 01:40:38,834 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-07 01:40:38,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:40:38,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1450956, now seen corresponding path program 1 times [2021-12-07 01:40:38,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:40:38,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922612916] [2021-12-07 01:40:38,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:40:38,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:40:38,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-07 01:40:38,845 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-07 01:40:38,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-07 01:40:38,851 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-07 01:40:38,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:40:38,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1828301702, now seen corresponding path program 1 times [2021-12-07 01:40:38,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:40:38,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695793548] [2021-12-07 01:40:38,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:40:38,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:40:38,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-07 01:40:38,866 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-07 01:40:38,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-07 01:40:38,878 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-07 01:40:38,976 INFO L210 LassoAnalysis]: Preferences: [2021-12-07 01:40:38,977 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-07 01:40:38,977 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-07 01:40:38,977 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-07 01:40:38,977 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-07 01:40:38,977 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-07 01:40:38,977 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-07 01:40:38,977 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-07 01:40:38,978 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration1_Loop [2021-12-07 01:40:38,978 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-07 01:40:38,978 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-07 01:40:38,991 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-07 01:40:38,996 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-07 01:40:38,998 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-07 01:40:39,000 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-07 01:40:39,007 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-07 01:40:39,048 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-07 01:40:39,049 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-07 01:40:39,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-07 01:40:39,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:39,052 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-07 01:40:39,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-12-07 01:40:39,054 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-07 01:40:39,054 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-07 01:40:39,068 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-07 01:40:39,068 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-07 01:40:39,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-12-07 01:40:39,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-07 01:40:39,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:39,089 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-07 01:40:39,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-12-07 01:40:39,091 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-07 01:40:39,091 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-07 01:40:39,099 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-07 01:40:39,100 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret5=0} Honda state: {fibo_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-07 01:40:39,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Ended with exit code 0 [2021-12-07 01:40:39,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-07 01:40:39,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:39,119 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-07 01:40:39,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-12-07 01:40:39,121 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-07 01:40:39,121 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-07 01:40:39,129 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-07 01:40:39,129 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-07 01:40:39,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-12-07 01:40:39,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-07 01:40:39,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:39,149 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-07 01:40:39,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-12-07 01:40:39,151 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-07 01:40:39,151 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-07 01:40:39,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Ended with exit code 0 [2021-12-07 01:40:39,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-07 01:40:39,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:39,180 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-07 01:40:39,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-12-07 01:40:39,181 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-07 01:40:39,181 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-07 01:40:39,245 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-07 01:40:39,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-12-07 01:40:39,248 INFO L210 LassoAnalysis]: Preferences: [2021-12-07 01:40:39,248 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-07 01:40:39,248 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-07 01:40:39,248 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-07 01:40:39,248 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-07 01:40:39,248 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-07 01:40:39,248 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-07 01:40:39,248 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-07 01:40:39,248 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration1_Loop [2021-12-07 01:40:39,248 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-07 01:40:39,249 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-07 01:40:39,250 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-07 01:40:39,252 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-07 01:40:39,254 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-07 01:40:39,256 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-07 01:40:39,261 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-07 01:40:39,285 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-07 01:40:39,288 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-07 01:40:39,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-07 01:40:39,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:39,290 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-07 01:40:39,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-12-07 01:40:39,291 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 [2021-12-07 01:40:39,299 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-07 01:40:39,299 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-07 01:40:39,299 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-07 01:40:39,300 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-07 01:40:39,300 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-07 01:40:39,301 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-07 01:40:39,301 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-07 01:40:39,303 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-07 01:40:39,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-12-07 01:40:39,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-07 01:40:39,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:39,322 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-07 01:40:39,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-12-07 01:40:39,324 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 [2021-12-07 01:40:39,332 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-07 01:40:39,332 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-07 01:40:39,332 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-07 01:40:39,332 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-07 01:40:39,332 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-07 01:40:39,333 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-07 01:40:39,333 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-07 01:40:39,334 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-07 01:40:39,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Ended with exit code 0 [2021-12-07 01:40:39,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-07 01:40:39,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:39,354 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-07 01:40:39,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-12-07 01:40:39,355 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 [2021-12-07 01:40:39,362 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-07 01:40:39,362 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-07 01:40:39,363 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-07 01:40:39,363 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-07 01:40:39,363 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-07 01:40:39,363 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-07 01:40:39,363 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-07 01:40:39,364 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-07 01:40:39,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Ended with exit code 0 [2021-12-07 01:40:39,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-07 01:40:39,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:39,384 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-07 01:40:39,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-12-07 01:40:39,390 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 [2021-12-07 01:40:39,396 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-07 01:40:39,397 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-07 01:40:39,397 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-07 01:40:39,397 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-07 01:40:39,397 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-07 01:40:39,398 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-07 01:40:39,398 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-07 01:40:39,400 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-07 01:40:39,404 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-07 01:40:39,404 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-12-07 01:40:39,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-07 01:40:39,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:39,410 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-07 01:40:39,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-12-07 01:40:39,451 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-07 01:40:39,451 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-07 01:40:39,451 INFO L513 LassoAnalysis]: Proved termination. [2021-12-07 01:40:39,452 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2021-12-07 01:40:39,474 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Ended with exit code 0 [2021-12-07 01:40:39,477 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-07 01:40:39,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:40:39,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:39,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 01:40:39,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:40:39,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:39,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 01:40:39,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:40:39,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:40:39,601 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 [2021-12-07 01:40:39,602 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) [2021-12-07 01:40:39,665 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. [2021-12-07 01:40:39,666 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 [2021-12-07 01:40:39,670 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) [2021-12-07 01:40:39,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2021-12-07 01:40:39,672 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2021-12-07 01:40:39,673 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-07 01:40:39,673 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2021-12-07 01:40:39,673 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-07 01:40:39,673 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2021-12-07 01:40:39,673 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-07 01:40:39,674 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 48 states and 60 transitions. [2021-12-07 01:40:39,677 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-07 01:40:39,682 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 48 states to 25 states and 34 transitions. [2021-12-07 01:40:39,683 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2021-12-07 01:40:39,683 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2021-12-07 01:40:39,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2021-12-07 01:40:39,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-07 01:40:39,684 INFO L681 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-12-07 01:40:39,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2021-12-07 01:40:39,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2021-12-07 01:40:39,703 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) [2021-12-07 01:40:39,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2021-12-07 01:40:39,704 INFO L704 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-12-07 01:40:39,704 INFO L587 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-12-07 01:40:39,704 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-12-07 01:40:39,704 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2021-12-07 01:40:39,705 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-07 01:40:39,705 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-07 01:40:39,705 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-07 01:40:39,706 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:40:39,706 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:40:39,706 INFO L791 eck$LassoCheckResult]: Stem: 122#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(11, 2);call #Ultimate.allocInit(12, 3); 123#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 7; 128#L27 call main_#t~ret6#1 := fibo(main_~x~0#1);< 132#fiboENTRY ~n := #in~n; 133#L8 assume !(~n < 1); 138#L10 assume !(1 == ~n); 127#L13 call #t~ret4 := 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 [2021-12-07 01:40:39,706 INFO L793 eck$LassoCheckResult]: Loop: 125#L13-1 call #t~ret5 := fibo(~n - 2);< 126#fiboENTRY ~n := #in~n; 141#L8 assume !(~n < 1); 140#L10 assume !(1 == ~n); 124#L13 call #t~ret4 := 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 [2021-12-07 01:40:39,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:40:39,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1181449843, now seen corresponding path program 1 times [2021-12-07 01:40:39,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:40:39,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228082525] [2021-12-07 01:40:39,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:40:39,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:40:39,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:39,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 01:40:39,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:39,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:40:39,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:40:39,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228082525] [2021-12-07 01:40:39,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228082525] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:40:39,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:40:39,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:40:39,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504789956] [2021-12-07 01:40:39,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:40:39,767 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-07 01:40:39,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:40:39,767 INFO L85 PathProgramCache]: Analyzing trace with hash 246097683, now seen corresponding path program 1 times [2021-12-07 01:40:39,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:40:39,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091584257] [2021-12-07 01:40:39,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:40:39,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:40:39,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:39,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-07 01:40:39,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:39,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:40:39,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:40:39,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091584257] [2021-12-07 01:40:39,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091584257] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:40:39,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:40:39,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:40:39,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143290585] [2021-12-07 01:40:39,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:40:39,800 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-07 01:40:39,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:40:39,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 01:40:39,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:40:39,803 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. cyclomatic complexity: 8 Second operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-07 01:40:39,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:40:39,848 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-12-07 01:40:39,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:40:39,850 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2021-12-07 01:40:39,851 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-07 01:40:39,852 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2021-12-07 01:40:39,852 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2021-12-07 01:40:39,852 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2021-12-07 01:40:39,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2021-12-07 01:40:39,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-07 01:40:39,853 INFO L681 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-12-07 01:40:39,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2021-12-07 01:40:39,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-07 01:40:39,855 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) [2021-12-07 01:40:39,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-12-07 01:40:39,856 INFO L704 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-12-07 01:40:39,856 INFO L587 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-12-07 01:40:39,856 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-12-07 01:40:39,856 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2021-12-07 01:40:39,857 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-07 01:40:39,857 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-07 01:40:39,857 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-07 01:40:39,858 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:40:39,858 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-12-07 01:40:39,858 INFO L791 eck$LassoCheckResult]: Stem: 195#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(11, 2);call #Ultimate.allocInit(12, 3); 196#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 7; 201#L27 call main_#t~ret6#1 := fibo(main_~x~0#1);< 205#fiboENTRY ~n := #in~n; 207#L8 assume !(~n < 1); 211#L10 assume !(1 == ~n); 200#L13 call #t~ret4 := 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 [2021-12-07 01:40:39,858 INFO L793 eck$LassoCheckResult]: Loop: 198#L13-1 call #t~ret5 := fibo(~n - 2);< 199#fiboENTRY ~n := #in~n; 217#L8 assume !(~n < 1); 215#L10 assume !(1 == ~n); 197#L13 call #t~ret4 := 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 [2021-12-07 01:40:39,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:40:39,858 INFO L85 PathProgramCache]: Analyzing trace with hash 2029785426, now seen corresponding path program 1 times [2021-12-07 01:40:39,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:40:39,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702130684] [2021-12-07 01:40:39,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:40:39,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:40:39,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:39,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 01:40:39,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:39,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:40:39,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:40:39,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702130684] [2021-12-07 01:40:39,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702130684] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:40:39,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635507804] [2021-12-07 01:40:39,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:40:39,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:40:39,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:39,900 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:40:39,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-07 01:40:39,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:39,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 01:40:39,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:40:39,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:40:39,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:40:40,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:40:40,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635507804] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:40:40,010 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:40:40,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-07 01:40:40,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412523011] [2021-12-07 01:40:40,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:40:40,010 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-07 01:40:40,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:40:40,011 INFO L85 PathProgramCache]: Analyzing trace with hash -960881524, now seen corresponding path program 1 times [2021-12-07 01:40:40,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:40:40,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368064815] [2021-12-07 01:40:40,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:40:40,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:40:40,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-07 01:40:40,015 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-07 01:40:40,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-07 01:40:40,020 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-07 01:40:40,091 INFO L210 LassoAnalysis]: Preferences: [2021-12-07 01:40:40,091 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-07 01:40:40,091 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-07 01:40:40,091 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-07 01:40:40,091 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-07 01:40:40,098 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-07 01:40:40,099 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-07 01:40:40,099 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-07 01:40:40,099 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration3_Loop [2021-12-07 01:40:40,099 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-07 01:40:40,099 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-07 01:40:40,100 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-07 01:40:40,102 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-07 01:40:40,107 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-07 01:40:40,109 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-07 01:40:40,129 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Ended with exit code 0 [2021-12-07 01:40:40,132 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-07 01:40:40,133 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-07 01:40:40,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-07 01:40:40,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:40,133 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-07 01:40:40,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-12-07 01:40:40,135 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-07 01:40:40,135 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-07 01:40:40,143 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-07 01:40:40,143 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-07 01:40:40,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Ended with exit code 0 [2021-12-07 01:40:40,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-07 01:40:40,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:40,162 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-07 01:40:40,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-12-07 01:40:40,163 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-07 01:40:40,163 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-07 01:40:40,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Ended with exit code 0 [2021-12-07 01:40:40,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-07 01:40:40,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:40,190 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-07 01:40:40,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-12-07 01:40:40,191 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-07 01:40:40,192 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-07 01:40:41,176 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-07 01:40:41,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-12-07 01:40:41,179 INFO L210 LassoAnalysis]: Preferences: [2021-12-07 01:40:41,179 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-07 01:40:41,179 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-07 01:40:41,179 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-07 01:40:41,179 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-07 01:40:41,179 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-07 01:40:41,179 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-07 01:40:41,180 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-07 01:40:41,180 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration3_Loop [2021-12-07 01:40:41,180 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-07 01:40:41,180 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-07 01:40:41,180 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-07 01:40:41,182 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-07 01:40:41,183 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-07 01:40:41,185 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-07 01:40:41,202 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-07 01:40:41,202 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-07 01:40:41,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-07 01:40:41,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:41,203 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-07 01:40:41,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-12-07 01:40:41,205 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 [2021-12-07 01:40:41,212 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-07 01:40:41,212 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-07 01:40:41,212 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-07 01:40:41,212 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-07 01:40:41,212 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-07 01:40:41,213 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-07 01:40:41,213 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-07 01:40:41,214 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-07 01:40:41,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-12-07 01:40:41,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-07 01:40:41,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:41,233 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-07 01:40:41,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-12-07 01:40:41,234 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 [2021-12-07 01:40:41,241 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-07 01:40:41,241 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-07 01:40:41,241 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-07 01:40:41,241 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-07 01:40:41,241 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-07 01:40:41,242 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-07 01:40:41,242 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-07 01:40:41,243 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-07 01:40:41,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Ended with exit code 0 [2021-12-07 01:40:41,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-07 01:40:41,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:41,262 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-07 01:40:41,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-12-07 01:40:41,263 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 [2021-12-07 01:40:41,271 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-07 01:40:41,271 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-07 01:40:41,271 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-07 01:40:41,271 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-07 01:40:41,271 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-07 01:40:41,272 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-07 01:40:41,272 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-07 01:40:41,274 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-07 01:40:41,277 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-12-07 01:40:41,277 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-12-07 01:40:41,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-07 01:40:41,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:41,278 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-07 01:40:41,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-12-07 01:40:41,279 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-07 01:40:41,279 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-07 01:40:41,279 INFO L513 LassoAnalysis]: Proved termination. [2021-12-07 01:40:41,280 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2021-12-07 01:40:41,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Ended with exit code 0 [2021-12-07 01:40:41,298 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-07 01:40:41,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:40:41,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:41,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 01:40:41,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:40:41,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:41,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-07 01:40:41,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:40:41,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:40:41,427 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 [2021-12-07 01:40:41,428 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) [2021-12-07 01:40:41,545 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. [2021-12-07 01:40:41,546 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 [2021-12-07 01:40:41,546 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) [2021-12-07 01:40:41,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2021-12-07 01:40:41,547 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 10 letters. [2021-12-07 01:40:41,547 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-07 01:40:41,548 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 22 letters. Loop has 10 letters. [2021-12-07 01:40:41,548 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-07 01:40:41,548 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 20 letters. [2021-12-07 01:40:41,549 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-07 01:40:41,549 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 183 transitions. [2021-12-07 01:40:41,554 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-12-07 01:40:41,558 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 108 states and 152 transitions. [2021-12-07 01:40:41,558 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 64 [2021-12-07 01:40:41,559 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2021-12-07 01:40:41,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 152 transitions. [2021-12-07 01:40:41,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-07 01:40:41,559 INFO L681 BuchiCegarLoop]: Abstraction has 108 states and 152 transitions. [2021-12-07 01:40:41,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states and 152 transitions. [2021-12-07 01:40:41,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2021-12-07 01:40:41,568 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) [2021-12-07 01:40:41,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2021-12-07 01:40:41,570 INFO L704 BuchiCegarLoop]: Abstraction has 94 states and 126 transitions. [2021-12-07 01:40:41,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:40:41,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-07 01:40:41,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-07 01:40:41,571 INFO L87 Difference]: Start difference. First operand 94 states and 126 transitions. Second operand has 12 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 01:40:41,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:40:41,644 INFO L93 Difference]: Finished difference Result 123 states and 165 transitions. [2021-12-07 01:40:41,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 01:40:41,645 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 123 states and 165 transitions. [2021-12-07 01:40:41,648 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-12-07 01:40:41,651 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 123 states to 118 states and 160 transitions. [2021-12-07 01:40:41,651 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2021-12-07 01:40:41,652 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2021-12-07 01:40:41,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 118 states and 160 transitions. [2021-12-07 01:40:41,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-07 01:40:41,652 INFO L681 BuchiCegarLoop]: Abstraction has 118 states and 160 transitions. [2021-12-07 01:40:41,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states and 160 transitions. [2021-12-07 01:40:41,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 106. [2021-12-07 01:40:41,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 66 states have (on average 1.196969696969697) internal successors, (79), 72 states have internal predecessors, (79), 24 states have call successors, (25), 13 states have call predecessors, (25), 16 states have return successors, (37), 20 states have call predecessors, (37), 22 states have call successors, (37) [2021-12-07 01:40:41,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 141 transitions. [2021-12-07 01:40:41,661 INFO L704 BuchiCegarLoop]: Abstraction has 106 states and 141 transitions. [2021-12-07 01:40:41,661 INFO L587 BuchiCegarLoop]: Abstraction has 106 states and 141 transitions. [2021-12-07 01:40:41,661 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-12-07 01:40:41,661 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 106 states and 141 transitions. [2021-12-07 01:40:41,663 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-12-07 01:40:41,663 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-07 01:40:41,663 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-07 01:40:41,665 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:40:41,665 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2021-12-07 01:40:41,665 INFO L791 eck$LassoCheckResult]: Stem: 789#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(11, 2);call #Ultimate.allocInit(12, 3); 790#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 7; 804#L27 call main_#t~ret6#1 := fibo(main_~x~0#1);< 806#fiboENTRY ~n := #in~n; 854#L8 assume !(~n < 1); 853#L10 assume !(1 == ~n); 803#L13 call #t~ret4 := fibo(~n - 1);< 805#fiboENTRY ~n := #in~n; 815#L8 assume !(~n < 1); 820#L10 assume !(1 == ~n); 826#L13 call #t~ret4 := fibo(~n - 1);< 847#fiboENTRY ~n := #in~n; 851#L8 assume !(~n < 1); 849#L10 assume !(1 == ~n); 843#L13 call #t~ret4 := fibo(~n - 1);< 847#fiboENTRY ~n := #in~n; 851#L8 assume !(~n < 1); 849#L10 assume !(1 == ~n); 843#L13 call #t~ret4 := fibo(~n - 1);< 847#fiboENTRY ~n := #in~n; 852#L8 assume !(~n < 1); 850#L10 assume 1 == ~n;#res := 1; 848#fiboFINAL assume true; 846#fiboEXIT >#33#return; 792#L13-1 call #t~ret5 := fibo(~n - 2);< 844#fiboENTRY ~n := #in~n; 892#L8 assume ~n < 1;#res := 0; 891#fiboFINAL assume true; 890#fiboEXIT >#35#return; 889#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 887#fiboFINAL assume true; 879#fiboEXIT >#33#return; 824#L13-1 [2021-12-07 01:40:41,665 INFO L793 eck$LassoCheckResult]: Loop: 824#L13-1 call #t~ret5 := fibo(~n - 2);< 802#fiboENTRY ~n := #in~n; 884#L8 assume !(~n < 1); 821#L10 assume !(1 == ~n); 822#L13 call #t~ret4 := fibo(~n - 1);< 802#fiboENTRY ~n := #in~n; 884#L8 assume !(~n < 1); 821#L10 assume !(1 == ~n); 822#L13 call #t~ret4 := fibo(~n - 1);< 802#fiboENTRY ~n := #in~n; 884#L8 assume !(~n < 1); 821#L10 assume 1 == ~n;#res := 1; 825#fiboFINAL assume true; 876#fiboEXIT >#33#return; 824#L13-1 call #t~ret5 := fibo(~n - 2);< 802#fiboENTRY ~n := #in~n; 884#L8 assume !(~n < 1); 821#L10 assume !(1 == ~n); 822#L13 call #t~ret4 := fibo(~n - 1);< 802#fiboENTRY ~n := #in~n; 884#L8 assume !(~n < 1); 821#L10 assume 1 == ~n;#res := 1; 825#fiboFINAL assume true; 876#fiboEXIT >#33#return; 824#L13-1 call #t~ret5 := fibo(~n - 2);< 802#fiboENTRY ~n := #in~n; 884#L8 assume ~n < 1;#res := 0; 885#fiboFINAL assume true; 883#fiboEXIT >#35#return; 878#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 886#fiboFINAL assume true; 880#fiboEXIT >#35#return; 878#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 886#fiboFINAL assume true; 880#fiboEXIT >#33#return; 824#L13-1 [2021-12-07 01:40:41,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:40:41,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1730264506, now seen corresponding path program 1 times [2021-12-07 01:40:41,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:40:41,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779648159] [2021-12-07 01:40:41,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:40:41,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:40:41,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:41,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Ended with exit code 0 [2021-12-07 01:40:41,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-07 01:40:41,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:41,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:40:41,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:41,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:40:41,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:41,763 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-07 01:40:41,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:40:41,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779648159] [2021-12-07 01:40:41,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779648159] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:40:41,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297338241] [2021-12-07 01:40:41,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:40:41,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:40:41,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:41,764 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:40:41,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-07 01:40:41,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:41,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-07 01:40:41,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:40:41,841 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-07 01:40:41,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:40:41,972 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-07 01:40:41,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297338241] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:40:41,973 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:40:41,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 18 [2021-12-07 01:40:41,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226470282] [2021-12-07 01:40:41,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:40:41,973 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-07 01:40:41,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:40:41,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1616897917, now seen corresponding path program 1 times [2021-12-07 01:40:41,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:40:41,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461723174] [2021-12-07 01:40:41,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:40:41,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:40:41,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:41,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-07 01:40:41,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:42,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:40:42,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:42,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:40:42,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:42,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:40:42,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:42,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:40:42,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:42,038 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 26 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-07 01:40:42,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:40:42,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461723174] [2021-12-07 01:40:42,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461723174] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:40:42,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972087583] [2021-12-07 01:40:42,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:40:42,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:40:42,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:42,040 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:40:42,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-07 01:40:42,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:42,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 01:40:42,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:40:42,105 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-07 01:40:42,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:40:42,210 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-07 01:40:42,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972087583] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:40:42,210 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:40:42,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-07 01:40:42,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781780887] [2021-12-07 01:40:42,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:40:42,211 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-07 01:40:42,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:40:42,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-07 01:40:42,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-12-07 01:40:42,211 INFO L87 Difference]: Start difference. First operand 106 states and 141 transitions. cyclomatic complexity: 40 Second operand has 19 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 11 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-07 01:40:42,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:40:42,394 INFO L93 Difference]: Finished difference Result 146 states and 193 transitions. [2021-12-07 01:40:42,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-07 01:40:42,395 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 146 states and 193 transitions. [2021-12-07 01:40:42,398 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2021-12-07 01:40:42,400 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 146 states to 139 states and 186 transitions. [2021-12-07 01:40:42,401 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 94 [2021-12-07 01:40:42,401 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 94 [2021-12-07 01:40:42,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 139 states and 186 transitions. [2021-12-07 01:40:42,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-07 01:40:42,401 INFO L681 BuchiCegarLoop]: Abstraction has 139 states and 186 transitions. [2021-12-07 01:40:42,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states and 186 transitions. [2021-12-07 01:40:42,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-12-07 01:40:42,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 86 states have (on average 1.1744186046511629) internal successors, (101), 92 states have internal predecessors, (101), 33 states have call successors, (34), 17 states have call predecessors, (34), 20 states have return successors, (51), 29 states have call predecessors, (51), 30 states have call successors, (51) [2021-12-07 01:40:42,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 186 transitions. [2021-12-07 01:40:42,411 INFO L704 BuchiCegarLoop]: Abstraction has 139 states and 186 transitions. [2021-12-07 01:40:42,411 INFO L587 BuchiCegarLoop]: Abstraction has 139 states and 186 transitions. [2021-12-07 01:40:42,411 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-12-07 01:40:42,411 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 139 states and 186 transitions. [2021-12-07 01:40:42,413 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2021-12-07 01:40:42,413 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-07 01:40:42,413 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-07 01:40:42,414 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [8, 7, 6, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:40:42,414 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-12-07 01:40:42,414 INFO L791 eck$LassoCheckResult]: Stem: 1564#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(11, 2);call #Ultimate.allocInit(12, 3); 1565#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 7; 1579#L27 call main_#t~ret6#1 := fibo(main_~x~0#1);< 1580#fiboENTRY ~n := #in~n; 1640#L8 assume !(~n < 1); 1600#L10 assume !(1 == ~n); 1577#L13 call #t~ret4 := fibo(~n - 1);< 1589#fiboENTRY ~n := #in~n; 1590#L8 assume !(~n < 1); 1597#L10 assume !(1 == ~n); 1576#L13 call #t~ret4 := fibo(~n - 1);< 1578#fiboENTRY ~n := #in~n; 1639#L8 assume !(~n < 1); 1638#L10 assume !(1 == ~n); 1634#L13 call #t~ret4 := fibo(~n - 1);< 1637#fiboENTRY ~n := #in~n; 1636#L8 assume !(~n < 1); 1635#L10 assume !(1 == ~n); 1621#L13 call #t~ret4 := fibo(~n - 1);< 1627#fiboENTRY ~n := #in~n; 1633#L8 assume !(~n < 1); 1632#L10 assume !(1 == ~n); 1622#L13 call #t~ret4 := fibo(~n - 1);< 1627#fiboENTRY ~n := #in~n; 1633#L8 assume !(~n < 1); 1632#L10 assume !(1 == ~n); 1622#L13 call #t~ret4 := fibo(~n - 1);< 1627#fiboENTRY ~n := #in~n; 1631#L8 assume !(~n < 1); 1630#L10 assume 1 == ~n;#res := 1; 1628#fiboFINAL assume true; 1626#fiboEXIT >#33#return; 1567#L13-1 call #t~ret5 := fibo(~n - 2);< 1623#fiboENTRY ~n := #in~n; 1642#L8 assume ~n < 1;#res := 0; 1688#fiboFINAL assume true; 1686#fiboEXIT >#35#return; 1682#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 1680#fiboFINAL assume true; 1663#fiboEXIT >#33#return; 1583#L13-1 [2021-12-07 01:40:42,414 INFO L793 eck$LassoCheckResult]: Loop: 1583#L13-1 call #t~ret5 := fibo(~n - 2);< 1575#fiboENTRY ~n := #in~n; 1588#L8 assume !(~n < 1); 1598#L10 assume !(1 == ~n); 1587#L13 call #t~ret4 := fibo(~n - 1);< 1575#fiboENTRY ~n := #in~n; 1588#L8 assume !(~n < 1); 1598#L10 assume !(1 == ~n); 1587#L13 call #t~ret4 := fibo(~n - 1);< 1575#fiboENTRY ~n := #in~n; 1588#L8 assume !(~n < 1); 1598#L10 assume 1 == ~n;#res := 1; 1599#fiboFINAL assume true; 1693#fiboEXIT >#33#return; 1668#L13-1 call #t~ret5 := fibo(~n - 2);< 1678#fiboENTRY ~n := #in~n; 1702#L8 assume ~n < 1;#res := 0; 1641#fiboFINAL assume true; 1694#fiboEXIT >#35#return; 1591#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 1699#fiboFINAL assume true; 1664#fiboEXIT >#33#return; 1583#L13-1 [2021-12-07 01:40:42,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:40:42,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1856310800, now seen corresponding path program 2 times [2021-12-07 01:40:42,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:40:42,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589214981] [2021-12-07 01:40:42,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:40:42,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:40:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-07 01:40:42,424 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-07 01:40:42,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-07 01:40:42,435 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-07 01:40:42,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:40:42,436 INFO L85 PathProgramCache]: Analyzing trace with hash 780094678, now seen corresponding path program 2 times [2021-12-07 01:40:42,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:40:42,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649555039] [2021-12-07 01:40:42,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:40:42,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:40:42,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-07 01:40:42,440 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-07 01:40:42,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-07 01:40:42,445 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-07 01:40:42,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:40:42,445 INFO L85 PathProgramCache]: Analyzing trace with hash -705851003, now seen corresponding path program 3 times [2021-12-07 01:40:42,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:40:42,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746494266] [2021-12-07 01:40:42,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:40:42,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:40:42,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:42,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-07 01:40:42,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:42,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:40:42,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:42,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:40:42,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:42,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-07 01:40:42,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:42,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:40:42,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:42,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 01:40:42,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:42,564 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 70 proven. 100 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-07 01:40:42,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:40:42,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746494266] [2021-12-07 01:40:42,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746494266] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:40:42,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173224862] [2021-12-07 01:40:42,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:40:42,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:40:42,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:42,566 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:40:42,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-07 01:40:42,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-07 01:40:42,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:40:42,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-07 01:40:42,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:40:42,707 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 87 proven. 47 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-12-07 01:40:42,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:40:42,917 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 87 proven. 49 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-07 01:40:42,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173224862] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:40:42,918 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:40:42,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 12] total 27 [2021-12-07 01:40:42,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418914057] [2021-12-07 01:40:42,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:40:43,086 INFO L210 LassoAnalysis]: Preferences: [2021-12-07 01:40:43,086 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-07 01:40:43,086 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-07 01:40:43,086 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-07 01:40:43,086 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-07 01:40:43,086 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-07 01:40:43,086 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-07 01:40:43,087 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-07 01:40:43,087 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration5_Loop [2021-12-07 01:40:43,087 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-07 01:40:43,087 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-07 01:40:43,088 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-07 01:40:43,089 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-07 01:40:43,095 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-07 01:40:43,096 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-07 01:40:43,130 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-07 01:40:43,130 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-07 01:40:43,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-07 01:40:43,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:43,131 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-07 01:40:43,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2021-12-07 01:40:43,133 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-07 01:40:43,133 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-07 01:40:43,141 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-07 01:40:43,141 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret5=0} Honda state: {fibo_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-07 01:40:43,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Ended with exit code 0 [2021-12-07 01:40:43,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-07 01:40:43,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:43,161 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-07 01:40:43,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2021-12-07 01:40:43,162 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-07 01:40:43,163 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-07 01:40:43,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Ended with exit code 0 [2021-12-07 01:40:43,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-07 01:40:43,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:43,195 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-07 01:40:43,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2021-12-07 01:40:43,196 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-07 01:40:43,196 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-07 01:40:44,358 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-07 01:40:44,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2021-12-07 01:40:44,362 INFO L210 LassoAnalysis]: Preferences: [2021-12-07 01:40:44,362 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-07 01:40:44,362 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-07 01:40:44,362 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-07 01:40:44,362 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-07 01:40:44,362 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-07 01:40:44,362 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-07 01:40:44,362 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-07 01:40:44,362 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration5_Loop [2021-12-07 01:40:44,362 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-07 01:40:44,362 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-07 01:40:44,363 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-07 01:40:44,364 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-07 01:40:44,369 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-07 01:40:44,371 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-07 01:40:44,400 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-07 01:40:44,400 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-07 01:40:44,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-07 01:40:44,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:44,401 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-07 01:40:44,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2021-12-07 01:40:44,403 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 [2021-12-07 01:40:44,410 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-07 01:40:44,410 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-07 01:40:44,410 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-07 01:40:44,410 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-07 01:40:44,410 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-07 01:40:44,411 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-07 01:40:44,411 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-07 01:40:44,412 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-07 01:40:44,430 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Ended with exit code 0 [2021-12-07 01:40:44,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-07 01:40:44,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:44,431 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-07 01:40:44,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-12-07 01:40:44,432 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 [2021-12-07 01:40:44,440 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-07 01:40:44,440 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-07 01:40:44,440 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-07 01:40:44,440 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-07 01:40:44,440 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-07 01:40:44,441 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-07 01:40:44,441 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-07 01:40:44,443 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-07 01:40:44,445 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-07 01:40:44,445 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-12-07 01:40:44,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-07 01:40:44,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:44,446 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-07 01:40:44,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-12-07 01:40:44,447 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-07 01:40:44,447 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-07 01:40:44,447 INFO L513 LassoAnalysis]: Proved termination. [2021-12-07 01:40:44,447 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2021-12-07 01:40:44,465 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Ended with exit code 0 [2021-12-07 01:40:44,466 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-07 01:40:44,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:40:44,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:44,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-07 01:40:44,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:40:44,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:44,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-07 01:40:44,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:40:44,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Ended with exit code 0 [2021-12-07 01:40:44,775 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 01:40:44,776 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 [2021-12-07 01:40:44,776 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 139 states and 186 transitions. cyclomatic complexity: 53 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) [2021-12-07 01:40:44,910 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 139 states and 186 transitions. cyclomatic complexity: 53. 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 272 states and 374 transitions. Complement of second has 45 states. [2021-12-07 01:40:44,910 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 [2021-12-07 01:40:44,911 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) [2021-12-07 01:40:44,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 41 transitions. [2021-12-07 01:40:44,911 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 40 letters. Loop has 22 letters. [2021-12-07 01:40:44,912 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-07 01:40:44,912 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-07 01:40:44,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:40:44,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:44,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-07 01:40:44,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:40:45,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:45,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-07 01:40:45,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:40:45,170 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 01:40:45,170 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 [2021-12-07 01:40:45,170 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 139 states and 186 transitions. cyclomatic complexity: 53 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) [2021-12-07 01:40:45,256 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 139 states and 186 transitions. cyclomatic complexity: 53. 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 333 states and 447 transitions. Complement of second has 25 states. [2021-12-07 01:40:45,256 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 [2021-12-07 01:40:45,257 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) [2021-12-07 01:40:45,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 24 transitions. [2021-12-07 01:40:45,257 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 40 letters. Loop has 22 letters. [2021-12-07 01:40:45,258 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-07 01:40:45,258 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-07 01:40:45,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:40:45,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:45,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-07 01:40:45,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:40:45,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:45,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-07 01:40:45,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:40:45,535 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 01:40:45,536 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 [2021-12-07 01:40:45,536 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 139 states and 186 transitions. cyclomatic complexity: 53 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) [2021-12-07 01:40:45,694 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 139 states and 186 transitions. cyclomatic complexity: 53. 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 1179 states and 1649 transitions. Complement of second has 138 states. [2021-12-07 01:40:45,695 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 [2021-12-07 01:40:45,696 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) [2021-12-07 01:40:45,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 46 transitions. [2021-12-07 01:40:45,696 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 40 letters. Loop has 22 letters. [2021-12-07 01:40:45,698 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-07 01:40:45,698 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 62 letters. Loop has 22 letters. [2021-12-07 01:40:45,699 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-07 01:40:45,699 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 40 letters. Loop has 44 letters. [2021-12-07 01:40:45,701 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-07 01:40:45,702 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1179 states and 1649 transitions. [2021-12-07 01:40:45,719 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 58 [2021-12-07 01:40:45,735 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1179 states to 679 states and 1031 transitions. [2021-12-07 01:40:45,736 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 271 [2021-12-07 01:40:45,736 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 302 [2021-12-07 01:40:45,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 679 states and 1031 transitions. [2021-12-07 01:40:45,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-07 01:40:45,737 INFO L681 BuchiCegarLoop]: Abstraction has 679 states and 1031 transitions. [2021-12-07 01:40:45,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states and 1031 transitions. [2021-12-07 01:40:45,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 521. [2021-12-07 01:40:45,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 317 states have (on average 1.1892744479495267) internal successors, (377), 340 states have internal predecessors, (377), 121 states have call successors, (135), 62 states have call predecessors, (135), 83 states have return successors, (236), 118 states have call predecessors, (236), 115 states have call successors, (236) [2021-12-07 01:40:45,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 748 transitions. [2021-12-07 01:40:45,769 INFO L704 BuchiCegarLoop]: Abstraction has 521 states and 748 transitions. [2021-12-07 01:40:45,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:40:45,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-07 01:40:45,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-12-07 01:40:45,770 INFO L87 Difference]: Start difference. First operand 521 states and 748 transitions. Second operand has 27 states, 25 states have (on average 2.4) internal successors, (60), 22 states have internal predecessors, (60), 15 states have call successors, (21), 8 states have call predecessors, (21), 6 states have return successors, (15), 9 states have call predecessors, (15), 10 states have call successors, (15) [2021-12-07 01:40:46,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:40:46,167 INFO L93 Difference]: Finished difference Result 319 states and 372 transitions. [2021-12-07 01:40:46,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-07 01:40:46,168 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 319 states and 372 transitions. [2021-12-07 01:40:46,172 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-12-07 01:40:46,172 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 319 states to 0 states and 0 transitions. [2021-12-07 01:40:46,172 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-12-07 01:40:46,173 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-12-07 01:40:46,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-12-07 01:40:46,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 01:40:46,173 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-07 01:40:46,173 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-07 01:40:46,173 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-07 01:40:46,173 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-12-07 01:40:46,173 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-12-07 01:40:46,173 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-12-07 01:40:46,173 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-12-07 01:40:46,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 07.12 01:40:46 BoogieIcfgContainer [2021-12-07 01:40:46,180 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-12-07 01:40:46,180 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-07 01:40:46,181 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-07 01:40:46,181 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-07 01:40:46,181 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:40:38" (3/4) ... [2021-12-07 01:40:46,184 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-07 01:40:46,184 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-07 01:40:46,185 INFO L158 Benchmark]: Toolchain (without parser) took 7941.84ms. Allocated memory was 109.1MB in the beginning and 132.1MB in the end (delta: 23.1MB). Free memory was 73.1MB in the beginning and 51.3MB in the end (delta: 21.8MB). Peak memory consumption was 45.1MB. Max. memory is 16.1GB. [2021-12-07 01:40:46,185 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 109.1MB. Free memory was 89.4MB in the beginning and 89.2MB in the end (delta: 137.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-07 01:40:46,186 INFO L158 Benchmark]: CACSL2BoogieTranslator took 159.12ms. Allocated memory is still 109.1MB. Free memory was 72.8MB in the beginning and 86.4MB in the end (delta: -13.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-07 01:40:46,186 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.77ms. Allocated memory is still 109.1MB. Free memory was 85.8MB in the beginning and 84.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-07 01:40:46,186 INFO L158 Benchmark]: Boogie Preprocessor took 11.68ms. Allocated memory is still 109.1MB. Free memory was 84.7MB in the beginning and 83.6MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-07 01:40:46,187 INFO L158 Benchmark]: RCFGBuilder took 169.79ms. Allocated memory is still 109.1MB. Free memory was 83.6MB in the beginning and 75.4MB in the end (delta: 8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-07 01:40:46,187 INFO L158 Benchmark]: BuchiAutomizer took 7569.87ms. Allocated memory was 109.1MB in the beginning and 132.1MB in the end (delta: 23.1MB). Free memory was 74.8MB in the beginning and 52.4MB in the end (delta: 22.5MB). Peak memory consumption was 47.6MB. Max. memory is 16.1GB. [2021-12-07 01:40:46,187 INFO L158 Benchmark]: Witness Printer took 3.79ms. Allocated memory is still 132.1MB. Free memory was 52.4MB in the beginning and 51.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-07 01:40:46,189 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 109.1MB. Free memory was 89.4MB in the beginning and 89.2MB in the end (delta: 137.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 159.12ms. Allocated memory is still 109.1MB. Free memory was 72.8MB in the beginning and 86.4MB in the end (delta: -13.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.77ms. Allocated memory is still 109.1MB. Free memory was 85.8MB in the beginning and 84.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 11.68ms. Allocated memory is still 109.1MB. Free memory was 84.7MB in the beginning and 83.6MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 169.79ms. Allocated memory is still 109.1MB. Free memory was 83.6MB in the beginning and 75.4MB in the end (delta: 8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 7569.87ms. Allocated memory was 109.1MB in the beginning and 132.1MB in the end (delta: 23.1MB). Free memory was 74.8MB in the beginning and 52.4MB in the end (delta: 22.5MB). Peak memory consumption was 47.6MB. Max. memory is 16.1GB. * Witness Printer took 3.79ms. Allocated memory is still 132.1MB. Free memory was 52.4MB in the beginning and 51.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 7 terminating modules (4 trivial, 2 deterministic, 1 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. 4 modules have a trivial ranking function, the largest among these consists of 27 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 7.5s and 6 iterations. TraceHistogramMax:8. Analysis of lassos took 4.9s. Construction of modules took 0.4s. Büchi inclusion checks took 1.9s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 6. Automata minimization 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 189 StatesRemovedByMinimization, 4 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 139 states and ocurred in iteration 4. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 8/26 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 453 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 437 mSDsluCounter, 442 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 304 mSDsCounter, 336 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1133 IncrementalHoareTripleChecker+Invalid, 1469 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 336 mSolverCounterUnsat, 138 mSDtfsCounter, 1133 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT1 SILN0 SILU0 SILI2 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital18 mio100 ax100 hnf95 lsp89 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq183 hnf92 smp82 dnf100 smp100 tf109 neg96 sie109 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 13ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 5 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 2.3s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-12-07 01:40:46,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-07 01:40:46,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-07 01:40:46,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-07 01:40:46,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-07 01:40:47,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2c6bf3-5891-4e67-9230-326dab70b475/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE