./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_7_false-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 0cd3be1d Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_6fb3792e-46b4-4bcb-a8ca-805c7e9708c2/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_6fb3792e-46b4-4bcb-a8ca-805c7e9708c2/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_6fb3792e-46b4-4bcb-a8ca-805c7e9708c2/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_6fb3792e-46b4-4bcb-a8ca-805c7e9708c2/bin-2019/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_7_false-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_6fb3792e-46b4-4bcb-a8ca-805c7e9708c2/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_6fb3792e-46b4-4bcb-a8ca-805c7e9708c2/bin-2019/uautomizer --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 16ceff9c26892934dc007d0ff3b64a1ad7cbb0e9 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-0cd3be1 [2018-11-28 10:36:26,810 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 10:36:26,811 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 10:36:26,818 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 10:36:26,819 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 10:36:26,819 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 10:36:26,820 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 10:36:26,821 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 10:36:26,822 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 10:36:26,823 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 10:36:26,824 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 10:36:26,824 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 10:36:26,824 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 10:36:26,825 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 10:36:26,825 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 10:36:26,826 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 10:36:26,826 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 10:36:26,828 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 10:36:26,829 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 10:36:26,829 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 10:36:26,830 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 10:36:26,831 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 10:36:26,833 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 10:36:26,833 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 10:36:26,833 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 10:36:26,833 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 10:36:26,834 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 10:36:26,834 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 10:36:26,835 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 10:36:26,836 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 10:36:26,836 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 10:36:26,836 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 10:36:26,836 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 10:36:26,837 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 10:36:26,837 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 10:36:26,838 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 10:36:26,838 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_6fb3792e-46b4-4bcb-a8ca-805c7e9708c2/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2018-11-28 10:36:26,847 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 10:36:26,847 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 10:36:26,848 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 10:36:26,848 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 10:36:26,848 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 10:36:26,849 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-11-28 10:36:26,849 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-11-28 10:36:26,849 INFO L133 SettingsManager]: * Use old map elimination=false [2018-11-28 10:36:26,849 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-11-28 10:36:26,849 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-11-28 10:36:26,849 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-11-28 10:36:26,849 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 10:36:26,850 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 10:36:26,850 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-28 10:36:26,850 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 10:36:26,850 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 10:36:26,850 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 10:36:26,850 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-11-28 10:36:26,850 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-11-28 10:36:26,851 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-11-28 10:36:26,851 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 10:36:26,851 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 10:36:26,851 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-11-28 10:36:26,851 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 10:36:26,851 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-11-28 10:36:26,852 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 10:36:26,852 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 10:36:26,852 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-11-28 10:36:26,852 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 10:36:26,852 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 10:36:26,852 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-11-28 10:36:26,853 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-11-28 10:36:26,853 INFO L133 SettingsManager]: * TransformationType=MODULO_NEIGHBOR 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-vcloud-master/worker/working_dir_6fb3792e-46b4-4bcb-a8ca-805c7e9708c2/bin-2019/uautomizer 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 -> 16ceff9c26892934dc007d0ff3b64a1ad7cbb0e9 [2018-11-28 10:36:26,877 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 10:36:26,886 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 10:36:26,888 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 10:36:26,889 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 10:36:26,890 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 10:36:26,890 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_6fb3792e-46b4-4bcb-a8ca-805c7e9708c2/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_7_false-unreach-call_true-termination.c [2018-11-28 10:36:26,934 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6fb3792e-46b4-4bcb-a8ca-805c7e9708c2/bin-2019/uautomizer/data/d2a60a9b1/781c0145a53b41bf82be630c1287c2eb/FLAG426abae91 [2018-11-28 10:36:27,355 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 10:36:27,355 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_6fb3792e-46b4-4bcb-a8ca-805c7e9708c2/sv-benchmarks/c/recursive-simple/fibo_7_false-unreach-call_true-termination.c [2018-11-28 10:36:27,361 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6fb3792e-46b4-4bcb-a8ca-805c7e9708c2/bin-2019/uautomizer/data/d2a60a9b1/781c0145a53b41bf82be630c1287c2eb/FLAG426abae91 [2018-11-28 10:36:27,372 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_6fb3792e-46b4-4bcb-a8ca-805c7e9708c2/bin-2019/uautomizer/data/d2a60a9b1/781c0145a53b41bf82be630c1287c2eb [2018-11-28 10:36:27,375 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 10:36:27,376 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 10:36:27,377 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 10:36:27,377 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 10:36:27,380 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 10:36:27,380 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 10:36:27" (1/1) ... [2018-11-28 10:36:27,383 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72a65b9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:36:27, skipping insertion in model container [2018-11-28 10:36:27,383 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 10:36:27" (1/1) ... [2018-11-28 10:36:27,389 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 10:36:27,400 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 10:36:27,501 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 10:36:27,504 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 10:36:27,513 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 10:36:27,521 INFO L195 MainTranslator]: Completed translation [2018-11-28 10:36:27,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:36:27 WrapperNode [2018-11-28 10:36:27,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 10:36:27,522 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 10:36:27,522 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 10:36:27,522 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 10:36:27,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:36:27" (1/1) ... [2018-11-28 10:36:27,530 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:36:27" (1/1) ... [2018-11-28 10:36:27,540 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 10:36:27,541 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 10:36:27,541 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 10:36:27,541 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 10:36:27,549 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:36:27" (1/1) ... [2018-11-28 10:36:27,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:36:27" (1/1) ... [2018-11-28 10:36:27,549 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:36:27" (1/1) ... [2018-11-28 10:36:27,549 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:36:27" (1/1) ... [2018-11-28 10:36:27,551 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:36:27" (1/1) ... [2018-11-28 10:36:27,553 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:36:27" (1/1) ... [2018-11-28 10:36:27,553 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:36:27" (1/1) ... [2018-11-28 10:36:27,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 10:36:27,554 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 10:36:27,554 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 10:36:27,554 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 10:36:27,555 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:36:27" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6fb3792e-46b4-4bcb-a8ca-805c7e9708c2/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 10:36:27,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 10:36:27,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 10:36:27,625 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2018-11-28 10:36:27,625 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2018-11-28 10:36:27,703 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 10:36:27,704 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-11-28 10:36:27,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 10:36:27 BoogieIcfgContainer [2018-11-28 10:36:27,704 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 10:36:27,704 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-11-28 10:36:27,704 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-11-28 10:36:27,706 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-11-28 10:36:27,707 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-28 10:36:27,707 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 10:36:27" (1/3) ... [2018-11-28 10:36:27,708 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@442dc3f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 10:36:27, skipping insertion in model container [2018-11-28 10:36:27,708 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-28 10:36:27,708 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:36:27" (2/3) ... [2018-11-28 10:36:27,708 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@442dc3f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 10:36:27, skipping insertion in model container [2018-11-28 10:36:27,708 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-28 10:36:27,708 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 10:36:27" (3/3) ... [2018-11-28 10:36:27,709 INFO L375 chiAutomizerObserver]: Analyzing ICFG fibo_7_false-unreach-call_true-termination.c [2018-11-28 10:36:27,749 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 10:36:27,749 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-11-28 10:36:27,749 INFO L375 BuchiCegarLoop]: Hoare is false [2018-11-28 10:36:27,749 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-11-28 10:36:27,749 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 10:36:27,749 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 10:36:27,750 INFO L379 BuchiCegarLoop]: Difference is false [2018-11-28 10:36:27,750 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 10:36:27,750 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-11-28 10:36:27,758 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2018-11-28 10:36:27,774 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-28 10:36:27,775 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 10:36:27,775 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 10:36:27,781 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-11-28 10:36:27,782 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-28 10:36:27,782 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-11-28 10:36:27,782 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2018-11-28 10:36:27,783 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-28 10:36:27,784 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 10:36:27,784 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 10:36:27,784 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-11-28 10:36:27,784 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-28 10:36:27,791 INFO L794 eck$LassoCheckResult]: Stem: 8#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 19#L25true call main_#t~ret2 := fibo(main_~x~0);< 11#fiboENTRYtrue [2018-11-28 10:36:27,791 INFO L796 eck$LassoCheckResult]: Loop: 11#fiboENTRYtrue ~n := #in~n; 7#L6true assume !(~n < 1); 10#L8true assume !(1 == ~n); 18#L11true call #t~ret0 := fibo(~n - 1);< 11#fiboENTRYtrue [2018-11-28 10:36:27,795 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:36:27,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1021, now seen corresponding path program 1 times [2018-11-28 10:36:27,796 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:36:27,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:36:27,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:36:27,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:36:27,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:36:27,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 10:36:27,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 10:36:27,855 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:36:27,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 1 times [2018-11-28 10:36:27,856 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:36:27,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:36:27,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:36:27,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:36:27,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:36:27,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 10:36:27,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 10:36:27,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:36:27,864 INFO L82 PathProgramCache]: Analyzing trace with hash 943411592, now seen corresponding path program 1 times [2018-11-28 10:36:27,864 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:36:27,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:36:27,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:36:27,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:36:27,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:36:27,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 10:36:27,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 10:36:27,936 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 10:36:27,937 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 10:36:27,937 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 10:36:27,937 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 10:36:27,937 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 10:36:27,937 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 10:36:27,937 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 10:36:27,938 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 10:36:27,938 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration1_Loop [2018-11-28 10:36:27,938 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 10:36:27,940 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 10:36:27,953 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:27,958 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:27,963 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:27,968 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:27,970 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:28,034 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 10:36:28,035 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6fb3792e-46b4-4bcb-a8ca-805c7e9708c2/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 10:36:28,045 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 10:36:28,045 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 10:36:28,055 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 10:36:28,055 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6fb3792e-46b4-4bcb-a8ca-805c7e9708c2/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 10:36:28,073 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 10:36:28,073 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 10:36:28,079 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 10:36:28,080 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6fb3792e-46b4-4bcb-a8ca-805c7e9708c2/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 10:36:28,094 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 10:36:28,094 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 10:36:28,096 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 10:36:28,096 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret0=0} Honda state: {fibo_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6fb3792e-46b4-4bcb-a8ca-805c7e9708c2/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 10:36:28,111 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 10:36:28,111 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 10:36:28,113 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 10:36:28,113 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret1=0} Honda state: {fibo_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6fb3792e-46b4-4bcb-a8ca-805c7e9708c2/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 10:36:28,127 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 10:36:28,127 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6fb3792e-46b4-4bcb-a8ca-805c7e9708c2/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 10:36:28,145 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 10:36:28,145 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 10:36:28,162 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-28 10:36:28,163 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 10:36:28,163 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 10:36:28,163 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 10:36:28,163 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 10:36:28,163 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-28 10:36:28,163 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 10:36:28,163 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 10:36:28,164 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 10:36:28,164 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration1_Loop [2018-11-28 10:36:28,164 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 10:36:28,164 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 10:36:28,164 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:28,166 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:28,168 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:28,169 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:28,171 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:28,225 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 10:36:28,228 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-28 10:36:28,229 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 10:36:28,230 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 10:36:28,230 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 10:36:28,231 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 10:36:28,231 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 10:36:28,231 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 10:36:28,232 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 10:36:28,233 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 10:36:28,235 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 10:36:28,236 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 10:36:28,236 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 10:36:28,237 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 10:36:28,237 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 10:36:28,237 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 10:36:28,237 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 10:36:28,237 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 10:36:28,238 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 10:36:28,239 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 10:36:28,239 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 10:36:28,240 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 10:36:28,240 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 10:36:28,240 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 10:36:28,240 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 10:36:28,240 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 10:36:28,241 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 10:36:28,241 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 10:36:28,242 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 10:36:28,242 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 10:36:28,243 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 10:36:28,243 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 10:36:28,243 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 10:36:28,243 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 10:36:28,243 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 10:36:28,244 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 10:36:28,244 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 10:36:28,245 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 10:36:28,245 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 10:36:28,246 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 10:36:28,246 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 10:36:28,246 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 10:36:28,246 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 10:36:28,246 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 10:36:28,247 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 10:36:28,247 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 10:36:28,251 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-28 10:36:28,254 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-28 10:36:28,255 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-28 10:36:28,256 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-28 10:36:28,256 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-28 10:36:28,257 INFO L518 LassoAnalysis]: Proved termination. [2018-11-28 10:36:28,257 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2018-11-28 10:36:28,258 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-28 10:36:28,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:36:28,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:36:28,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:36:28,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:36:28,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:36:28,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 10:36:28,336 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 [2018-11-28 10:36:28,337 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states. Second operand 4 states. [2018-11-28 10:36:28,423 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states.. Second operand 4 states. Result 47 states and 59 transitions. Complement of second has 12 states. [2018-11-28 10:36:28,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-28 10:36:28,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-11-28 10:36:28,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2018-11-28 10:36:28,427 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 4 letters. [2018-11-28 10:36:28,428 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 10:36:28,428 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 6 letters. Loop has 4 letters. [2018-11-28 10:36:28,429 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 10:36:28,429 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 8 letters. [2018-11-28 10:36:28,429 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 10:36:28,430 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 47 states and 59 transitions. [2018-11-28 10:36:28,433 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-28 10:36:28,438 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 47 states to 24 states and 33 transitions. [2018-11-28 10:36:28,439 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2018-11-28 10:36:28,439 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2018-11-28 10:36:28,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 33 transitions. [2018-11-28 10:36:28,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 10:36:28,441 INFO L705 BuchiCegarLoop]: Abstraction has 24 states and 33 transitions. [2018-11-28 10:36:28,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 33 transitions. [2018-11-28 10:36:28,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2018-11-28 10:36:28,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-11-28 10:36:28,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2018-11-28 10:36:28,462 INFO L728 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2018-11-28 10:36:28,462 INFO L608 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2018-11-28 10:36:28,462 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-11-28 10:36:28,462 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 25 transitions. [2018-11-28 10:36:28,463 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-28 10:36:28,463 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 10:36:28,463 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 10:36:28,464 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:36:28,464 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:36:28,465 INFO L794 eck$LassoCheckResult]: Stem: 120#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 121#L25 call main_#t~ret2 := fibo(main_~x~0);< 125#fiboENTRY ~n := #in~n; 126#L6 assume !(~n < 1); 124#L8 assume !(1 == ~n); 118#L11 call #t~ret0 := fibo(~n - 1);< 127#fiboENTRY ~n := #in~n; 128#L6 assume ~n < 1;#res := 0; 123#fiboFINAL assume true; 117#fiboEXIT >#32#return; 119#L11-1 [2018-11-28 10:36:28,465 INFO L796 eck$LassoCheckResult]: Loop: 119#L11-1 call #t~ret1 := fibo(~n - 2);< 132#fiboENTRY ~n := #in~n; 135#L6 assume !(~n < 1); 134#L8 assume !(1 == ~n); 130#L11 call #t~ret0 := fibo(~n - 1);< 132#fiboENTRY ~n := #in~n; 135#L6 assume ~n < 1;#res := 0; 131#fiboFINAL assume true; 133#fiboEXIT >#32#return; 119#L11-1 [2018-11-28 10:36:28,465 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:36:28,465 INFO L82 PathProgramCache]: Analyzing trace with hash 531553871, now seen corresponding path program 1 times [2018-11-28 10:36:28,465 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:36:28,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:36:28,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:36:28,466 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:36:28,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:36:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:36:28,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-28 10:36:28,527 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 10:36:28,528 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 10:36:28,529 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-28 10:36:28,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:36:28,529 INFO L82 PathProgramCache]: Analyzing trace with hash -606345326, now seen corresponding path program 1 times [2018-11-28 10:36:28,529 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:36:28,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:36:28,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:36:28,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:36:28,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:36:28,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:36:28,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-28 10:36:28,558 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 10:36:28,558 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 10:36:28,559 INFO L811 eck$LassoCheckResult]: loop already infeasible [2018-11-28 10:36:28,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 10:36:28,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-28 10:36:28,562 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. cyclomatic complexity: 8 Second operand 6 states. [2018-11-28 10:36:28,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:36:28,634 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2018-11-28 10:36:28,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 10:36:28,636 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 31 transitions. [2018-11-28 10:36:28,637 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-28 10:36:28,638 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 23 states and 29 transitions. [2018-11-28 10:36:28,638 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2018-11-28 10:36:28,638 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2018-11-28 10:36:28,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 29 transitions. [2018-11-28 10:36:28,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 10:36:28,639 INFO L705 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2018-11-28 10:36:28,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 29 transitions. [2018-11-28 10:36:28,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-11-28 10:36:28,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-28 10:36:28,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2018-11-28 10:36:28,644 INFO L728 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2018-11-28 10:36:28,644 INFO L608 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2018-11-28 10:36:28,644 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-11-28 10:36:28,644 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 29 transitions. [2018-11-28 10:36:28,646 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-28 10:36:28,646 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 10:36:28,646 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 10:36:28,647 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:36:28,647 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-11-28 10:36:28,647 INFO L794 eck$LassoCheckResult]: Stem: 183#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 184#L25 call main_#t~ret2 := fibo(main_~x~0);< 188#fiboENTRY ~n := #in~n; 189#L6 assume !(~n < 1); 187#L8 assume !(1 == ~n); 181#L11 call #t~ret0 := fibo(~n - 1);< 190#fiboENTRY ~n := #in~n; 191#L6 assume !(~n < 1); 185#L8 assume 1 == ~n;#res := 1; 186#fiboFINAL assume true; 180#fiboEXIT >#32#return; 182#L11-1 [2018-11-28 10:36:28,647 INFO L796 eck$LassoCheckResult]: Loop: 182#L11-1 call #t~ret1 := fibo(~n - 2);< 195#fiboENTRY ~n := #in~n; 202#L6 assume !(~n < 1); 201#L8 assume !(1 == ~n); 193#L11 call #t~ret0 := fibo(~n - 1);< 195#fiboENTRY ~n := #in~n; 202#L6 assume !(~n < 1); 201#L8 assume 1 == ~n;#res := 1; 199#fiboFINAL assume true; 197#fiboEXIT >#32#return; 182#L11-1 [2018-11-28 10:36:28,647 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:36:28,648 INFO L82 PathProgramCache]: Analyzing trace with hash -701674289, now seen corresponding path program 1 times [2018-11-28 10:36:28,648 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:36:28,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:36:28,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:36:28,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:36:28,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:36:28,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:36:28,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 10:36:28,688 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 10:36:28,688 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6fb3792e-46b4-4bcb-a8ca-805c7e9708c2/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 10:36:28,697 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:36:28,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:36:28,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:36:28,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 10:36:28,731 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 10:36:28,732 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-28 10:36:28,732 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-28 10:36:28,732 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:36:28,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1616811028, now seen corresponding path program 1 times [2018-11-28 10:36:28,732 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:36:28,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:36:28,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:36:28,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:36:28,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:36:28,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 10:36:28,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 10:36:28,835 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 10:36:28,836 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 10:36:28,836 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 10:36:28,836 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 10:36:28,836 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 10:36:28,836 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 10:36:28,836 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 10:36:28,836 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 10:36:28,836 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration3_Loop [2018-11-28 10:36:28,836 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 10:36:28,837 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 10:36:28,837 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:28,844 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:28,846 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:28,848 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:28,877 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 10:36:28,877 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6fb3792e-46b4-4bcb-a8ca-805c7e9708c2/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 10:36:28,879 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 10:36:28,879 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6fb3792e-46b4-4bcb-a8ca-805c7e9708c2/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 10:36:28,896 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 10:36:28,896 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 10:36:29,391 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-28 10:36:29,392 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 10:36:29,392 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 10:36:29,392 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 10:36:29,393 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 10:36:29,393 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-28 10:36:29,393 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 10:36:29,393 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 10:36:29,393 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 10:36:29,393 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration3_Loop [2018-11-28 10:36:29,393 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 10:36:29,393 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 10:36:29,394 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:29,397 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:29,403 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:29,405 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:29,436 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 10:36:29,436 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-28 10:36:29,436 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 10:36:29,437 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 10:36:29,437 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 10:36:29,437 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 10:36:29,437 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 10:36:29,437 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 10:36:29,437 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 10:36:29,437 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 10:36:29,439 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 10:36:29,440 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 10:36:29,440 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 10:36:29,440 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 10:36:29,440 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 10:36:29,440 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 10:36:29,440 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 10:36:29,441 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 10:36:29,441 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 10:36:29,445 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-28 10:36:29,448 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-28 10:36:29,449 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-28 10:36:29,449 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-28 10:36:29,449 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-28 10:36:29,449 INFO L518 LassoAnalysis]: Proved termination. [2018-11-28 10:36:29,449 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-11-28 10:36:29,450 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-28 10:36:29,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:36:29,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:36:29,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:36:29,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:36:29,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:36:29,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 10:36:29,552 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2018-11-28 10:36:29,553 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8 Second operand 7 states. [2018-11-28 10:36:29,648 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8. Second operand 7 states. Result 134 states and 182 transitions. Complement of second has 28 states. [2018-11-28 10:36:29,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-11-28 10:36:29,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-28 10:36:29,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 34 transitions. [2018-11-28 10:36:29,652 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 10 letters. [2018-11-28 10:36:29,652 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 10:36:29,653 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 21 letters. Loop has 10 letters. [2018-11-28 10:36:29,653 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 10:36:29,653 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 20 letters. [2018-11-28 10:36:29,653 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 10:36:29,654 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 134 states and 182 transitions. [2018-11-28 10:36:29,658 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-11-28 10:36:29,661 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 134 states to 107 states and 151 transitions. [2018-11-28 10:36:29,661 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 63 [2018-11-28 10:36:29,661 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2018-11-28 10:36:29,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 151 transitions. [2018-11-28 10:36:29,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 10:36:29,662 INFO L705 BuchiCegarLoop]: Abstraction has 107 states and 151 transitions. [2018-11-28 10:36:29,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states and 151 transitions. [2018-11-28 10:36:29,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2018-11-28 10:36:29,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-11-28 10:36:29,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2018-11-28 10:36:29,670 INFO L728 BuchiCegarLoop]: Abstraction has 93 states and 125 transitions. [2018-11-28 10:36:29,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-28 10:36:29,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-28 10:36:29,670 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand 7 states. [2018-11-28 10:36:29,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:36:29,721 INFO L93 Difference]: Finished difference Result 108 states and 146 transitions. [2018-11-28 10:36:29,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 10:36:29,722 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 108 states and 146 transitions. [2018-11-28 10:36:29,726 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-11-28 10:36:29,728 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 108 states to 105 states and 143 transitions. [2018-11-28 10:36:29,728 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 68 [2018-11-28 10:36:29,729 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2018-11-28 10:36:29,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 143 transitions. [2018-11-28 10:36:29,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 10:36:29,729 INFO L705 BuchiCegarLoop]: Abstraction has 105 states and 143 transitions. [2018-11-28 10:36:29,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states and 143 transitions. [2018-11-28 10:36:29,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2018-11-28 10:36:29,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-11-28 10:36:29,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 124 transitions. [2018-11-28 10:36:29,735 INFO L728 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2018-11-28 10:36:29,736 INFO L608 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2018-11-28 10:36:29,736 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-11-28 10:36:29,736 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 93 states and 124 transitions. [2018-11-28 10:36:29,737 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-11-28 10:36:29,737 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 10:36:29,737 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 10:36:29,738 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:36:29,738 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-11-28 10:36:29,738 INFO L794 eck$LassoCheckResult]: Stem: 703#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 704#L25 call main_#t~ret2 := fibo(main_~x~0);< 726#fiboENTRY ~n := #in~n; 748#L6 assume !(~n < 1); 707#L8 assume !(1 == ~n); 708#L11 call #t~ret0 := fibo(~n - 1);< 717#fiboENTRY ~n := #in~n; 719#L6 assume !(~n < 1); 728#L8 assume !(1 == ~n); 718#L11 call #t~ret0 := fibo(~n - 1);< 717#fiboENTRY ~n := #in~n; 719#L6 assume !(~n < 1); 728#L8 assume !(1 == ~n); 718#L11 call #t~ret0 := fibo(~n - 1);< 717#fiboENTRY ~n := #in~n; 720#L6 assume !(~n < 1); 752#L8 assume 1 == ~n;#res := 1; 751#fiboFINAL assume true; 750#fiboEXIT >#32#return; 710#L11-1 call #t~ret1 := fibo(~n - 2);< 749#fiboENTRY ~n := #in~n; 777#L6 assume ~n < 1;#res := 0; 774#fiboFINAL assume true; 773#fiboEXIT >#34#return; 772#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 771#fiboFINAL assume true; 759#fiboEXIT >#32#return; 760#L11-1 [2018-11-28 10:36:29,739 INFO L796 eck$LassoCheckResult]: Loop: 760#L11-1 call #t~ret1 := fibo(~n - 2);< 766#fiboENTRY ~n := #in~n; 775#L6 assume !(~n < 1); 768#L8 assume !(1 == ~n); 763#L11 call #t~ret0 := fibo(~n - 1);< 766#fiboENTRY ~n := #in~n; 775#L6 assume !(~n < 1); 768#L8 assume 1 == ~n;#res := 1; 769#fiboFINAL assume true; 770#fiboEXIT >#32#return; 760#L11-1 [2018-11-28 10:36:29,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:36:29,739 INFO L82 PathProgramCache]: Analyzing trace with hash -240562386, now seen corresponding path program 1 times [2018-11-28 10:36:29,739 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:36:29,739 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:36:29,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:36:29,740 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:36:29,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:36:29,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:36:29,805 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-28 10:36:29,805 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 10:36:29,805 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6fb3792e-46b4-4bcb-a8ca-805c7e9708c2/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 10:36:29,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:36:29,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:36:29,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:36:29,843 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-28 10:36:29,858 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 10:36:29,859 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-28 10:36:29,859 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-28 10:36:29,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:36:29,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1616811028, now seen corresponding path program 2 times [2018-11-28 10:36:29,859 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:36:29,859 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:36:29,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:36:29,860 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:36:29,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:36:29,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 10:36:29,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 10:36:29,932 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 10:36:29,932 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 10:36:29,933 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 10:36:29,933 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 10:36:29,933 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 10:36:29,933 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 10:36:29,933 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 10:36:29,933 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 10:36:29,933 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration4_Loop [2018-11-28 10:36:29,933 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 10:36:29,933 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 10:36:29,934 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:29,938 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:29,940 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:29,941 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:29,962 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 10:36:29,963 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6fb3792e-46b4-4bcb-a8ca-805c7e9708c2/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 10:36:29,965 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 10:36:29,965 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6fb3792e-46b4-4bcb-a8ca-805c7e9708c2/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 10:36:29,987 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 10:36:29,987 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 10:36:30,481 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-28 10:36:30,483 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 10:36:30,483 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 10:36:30,483 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 10:36:30,483 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 10:36:30,483 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-28 10:36:30,483 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 10:36:30,483 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 10:36:30,483 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 10:36:30,483 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration4_Loop [2018-11-28 10:36:30,483 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 10:36:30,484 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 10:36:30,484 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:30,486 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:30,487 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:30,489 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:30,510 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 10:36:30,510 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-28 10:36:30,510 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 10:36:30,511 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 10:36:30,511 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 10:36:30,511 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 10:36:30,511 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 10:36:30,511 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 10:36:30,511 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 10:36:30,511 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 10:36:30,513 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 10:36:30,513 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 10:36:30,513 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 10:36:30,513 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 10:36:30,513 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 10:36:30,514 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 10:36:30,514 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 10:36:30,514 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 10:36:30,514 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 10:36:30,515 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 10:36:30,515 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 10:36:30,515 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 10:36:30,515 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 10:36:30,516 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 10:36:30,516 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 10:36:30,516 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 10:36:30,516 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 10:36:30,516 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 10:36:30,518 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 10:36:30,518 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 10:36:30,518 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 10:36:30,518 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 10:36:30,519 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 10:36:30,519 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 10:36:30,519 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 10:36:30,519 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 10:36:30,519 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 10:36:30,522 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-28 10:36:30,525 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-28 10:36:30,525 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-28 10:36:30,525 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-28 10:36:30,525 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-28 10:36:30,525 INFO L518 LassoAnalysis]: Proved termination. [2018-11-28 10:36:30,525 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-11-28 10:36:30,526 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-28 10:36:30,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:36:30,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:36:30,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:36:30,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:36:30,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:36:30,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 10:36:30,602 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2018-11-28 10:36:30,602 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-11-28 10:36:30,691 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36. Second operand 7 states. Result 162 states and 216 transitions. Complement of second has 25 states. [2018-11-28 10:36:30,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-11-28 10:36:30,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-28 10:36:30,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 34 transitions. [2018-11-28 10:36:30,692 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 27 letters. Loop has 10 letters. [2018-11-28 10:36:30,693 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 10:36:30,693 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-28 10:36:30,703 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:36:30,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:36:30,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:36:30,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:36:30,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:36:30,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 10:36:30,774 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 5 loop predicates [2018-11-28 10:36:30,774 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-11-28 10:36:30,850 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36. Second operand 7 states. Result 287 states and 386 transitions. Complement of second has 25 states. [2018-11-28 10:36:30,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-11-28 10:36:30,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-28 10:36:30,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 23 transitions. [2018-11-28 10:36:30,852 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 23 transitions. Stem has 27 letters. Loop has 10 letters. [2018-11-28 10:36:30,852 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 10:36:30,852 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-28 10:36:30,858 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:36:30,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:36:30,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:36:30,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:36:30,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:36:30,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 10:36:30,930 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 5 loop predicates [2018-11-28 10:36:30,930 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-11-28 10:36:31,085 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36. Second operand 7 states. Result 825 states and 1090 transitions. Complement of second has 112 states. [2018-11-28 10:36:31,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-11-28 10:36:31,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-28 10:36:31,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 39 transitions. [2018-11-28 10:36:31,087 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 39 transitions. Stem has 27 letters. Loop has 10 letters. [2018-11-28 10:36:31,088 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 10:36:31,088 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 39 transitions. Stem has 37 letters. Loop has 10 letters. [2018-11-28 10:36:31,088 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 10:36:31,088 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 39 transitions. Stem has 27 letters. Loop has 20 letters. [2018-11-28 10:36:31,089 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 10:36:31,089 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 825 states and 1090 transitions. [2018-11-28 10:36:31,100 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2018-11-28 10:36:31,108 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 825 states to 412 states and 594 transitions. [2018-11-28 10:36:31,108 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 155 [2018-11-28 10:36:31,109 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 179 [2018-11-28 10:36:31,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 412 states and 594 transitions. [2018-11-28 10:36:31,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 10:36:31,109 INFO L705 BuchiCegarLoop]: Abstraction has 412 states and 594 transitions. [2018-11-28 10:36:31,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states and 594 transitions. [2018-11-28 10:36:31,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 335. [2018-11-28 10:36:31,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2018-11-28 10:36:31,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 462 transitions. [2018-11-28 10:36:31,135 INFO L728 BuchiCegarLoop]: Abstraction has 335 states and 462 transitions. [2018-11-28 10:36:31,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-28 10:36:31,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-11-28 10:36:31,135 INFO L87 Difference]: Start difference. First operand 335 states and 462 transitions. Second operand 10 states. [2018-11-28 10:36:31,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:36:31,290 INFO L93 Difference]: Finished difference Result 497 states and 785 transitions. [2018-11-28 10:36:31,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 10:36:31,291 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 497 states and 785 transitions. [2018-11-28 10:36:31,297 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2018-11-28 10:36:31,307 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 497 states to 495 states and 782 transitions. [2018-11-28 10:36:31,307 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 242 [2018-11-28 10:36:31,308 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 242 [2018-11-28 10:36:31,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 495 states and 782 transitions. [2018-11-28 10:36:31,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 10:36:31,308 INFO L705 BuchiCegarLoop]: Abstraction has 495 states and 782 transitions. [2018-11-28 10:36:31,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states and 782 transitions. [2018-11-28 10:36:31,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 369. [2018-11-28 10:36:31,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2018-11-28 10:36:31,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 522 transitions. [2018-11-28 10:36:31,331 INFO L728 BuchiCegarLoop]: Abstraction has 369 states and 522 transitions. [2018-11-28 10:36:31,331 INFO L608 BuchiCegarLoop]: Abstraction has 369 states and 522 transitions. [2018-11-28 10:36:31,331 INFO L442 BuchiCegarLoop]: ======== Iteration 5============ [2018-11-28 10:36:31,331 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 369 states and 522 transitions. [2018-11-28 10:36:31,333 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 42 [2018-11-28 10:36:31,334 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 10:36:31,334 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 10:36:31,334 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-11-28 10:36:31,334 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-28 10:36:31,334 INFO L794 eck$LassoCheckResult]: Stem: 3543#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 3544#L25 call main_#t~ret2 := fibo(main_~x~0);< 3588#fiboENTRY ~n := #in~n; 3605#L6 assume !(~n < 1); 3604#L8 assume !(1 == ~n); 3599#L11 call #t~ret0 := fibo(~n - 1);< 3603#fiboENTRY ~n := #in~n; 3601#L6 assume !(~n < 1); 3602#L8 assume !(1 == ~n); 3557#L11 call #t~ret0 := fibo(~n - 1);< 3596#fiboENTRY ~n := #in~n; 3598#L6 assume !(~n < 1); 3600#L8 assume !(1 == ~n); 3556#L11 call #t~ret0 := fibo(~n - 1);< 3596#fiboENTRY ~n := #in~n; 3597#L6 assume !(~n < 1); 3555#L8 assume 1 == ~n;#res := 1; 3558#fiboFINAL assume true; 3677#fiboEXIT >#32#return; 3622#L11-1 call #t~ret1 := fibo(~n - 2);< 3623#fiboENTRY ~n := #in~n; 3865#L6 assume !(~n < 1); 3660#L8 assume !(1 == ~n); 3662#L11 call #t~ret0 := fibo(~n - 1);< 3873#fiboENTRY ~n := #in~n; 3888#L6 assume !(~n < 1); 3886#L8 assume !(1 == ~n); 3594#L11 call #t~ret0 := fibo(~n - 1);< 3591#fiboENTRY [2018-11-28 10:36:31,335 INFO L796 eck$LassoCheckResult]: Loop: 3591#fiboENTRY ~n := #in~n; 3595#L6 assume !(~n < 1); 3615#L8 assume !(1 == ~n); 3592#L11 call #t~ret0 := fibo(~n - 1);< 3591#fiboENTRY [2018-11-28 10:36:31,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:36:31,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1902381534, now seen corresponding path program 1 times [2018-11-28 10:36:31,335 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:36:31,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:36:31,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:36:31,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 10:36:31,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:36:31,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:36:31,364 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-28 10:36:31,364 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 10:36:31,364 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6fb3792e-46b4-4bcb-a8ca-805c7e9708c2/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 10:36:31,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:36:31,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:36:31,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:36:31,449 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-28 10:36:31,465 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 10:36:31,465 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 14 [2018-11-28 10:36:31,466 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-28 10:36:31,466 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:36:31,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 2 times [2018-11-28 10:36:31,474 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:36:31,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:36:31,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:36:31,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:36:31,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:36:31,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 10:36:31,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 10:36:31,499 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 10:36:31,499 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 10:36:31,499 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 10:36:31,499 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 10:36:31,499 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 10:36:31,500 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 10:36:31,500 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 10:36:31,500 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 10:36:31,500 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration5_Loop [2018-11-28 10:36:31,500 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 10:36:31,500 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 10:36:31,501 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:31,503 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:31,511 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:31,512 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:31,513 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:31,527 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 10:36:31,527 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6fb3792e-46b4-4bcb-a8ca-805c7e9708c2/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 10:36:31,529 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 10:36:31,529 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 10:36:31,531 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 10:36:31,531 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret0=0} Honda state: {fibo_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6fb3792e-46b4-4bcb-a8ca-805c7e9708c2/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 10:36:31,546 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 10:36:31,546 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6fb3792e-46b4-4bcb-a8ca-805c7e9708c2/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 10:36:31,563 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 10:36:31,563 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 10:36:31,578 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-28 10:36:31,579 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 10:36:31,579 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 10:36:31,580 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 10:36:31,580 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 10:36:31,580 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-28 10:36:31,580 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 10:36:31,580 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 10:36:31,580 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 10:36:31,580 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration5_Loop [2018-11-28 10:36:31,580 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 10:36:31,580 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 10:36:31,581 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:31,587 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:31,588 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:31,589 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:31,590 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:31,608 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 10:36:31,608 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-28 10:36:31,608 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 10:36:31,609 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 10:36:31,609 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 10:36:31,609 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 10:36:31,609 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 10:36:31,609 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 10:36:31,609 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 10:36:31,610 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 10:36:31,611 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-28 10:36:31,613 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-28 10:36:31,613 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-28 10:36:31,613 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-28 10:36:31,613 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-28 10:36:31,613 INFO L518 LassoAnalysis]: Proved termination. [2018-11-28 10:36:31,613 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2018-11-28 10:36:31,613 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-28 10:36:31,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:36:31,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:36:31,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:36:31,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:36:31,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:36:31,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 10:36:31,686 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-28 10:36:31,686 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 369 states and 522 transitions. cyclomatic complexity: 160 Second operand 5 states. [2018-11-28 10:36:31,725 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 369 states and 522 transitions. cyclomatic complexity: 160. Second operand 5 states. Result 379 states and 532 transitions. Complement of second has 13 states. [2018-11-28 10:36:31,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-28 10:36:31,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-28 10:36:31,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2018-11-28 10:36:31,726 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 28 letters. Loop has 4 letters. [2018-11-28 10:36:31,726 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 10:36:31,726 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-28 10:36:31,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:36:31,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:36:31,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:36:31,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:36:31,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:36:31,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 10:36:31,822 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-28 10:36:31,822 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 369 states and 522 transitions. cyclomatic complexity: 160 Second operand 5 states. [2018-11-28 10:36:31,872 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 369 states and 522 transitions. cyclomatic complexity: 160. Second operand 5 states. Result 379 states and 532 transitions. Complement of second has 13 states. [2018-11-28 10:36:31,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-28 10:36:31,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-28 10:36:31,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2018-11-28 10:36:31,873 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 28 letters. Loop has 4 letters. [2018-11-28 10:36:31,873 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 10:36:31,873 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-28 10:36:31,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:36:31,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:36:31,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:36:31,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:36:31,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:36:31,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 10:36:31,928 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-28 10:36:31,929 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 369 states and 522 transitions. cyclomatic complexity: 160 Second operand 5 states. [2018-11-28 10:36:31,980 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 369 states and 522 transitions. cyclomatic complexity: 160. Second operand 5 states. Result 494 states and 656 transitions. Complement of second has 14 states. [2018-11-28 10:36:31,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-28 10:36:31,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-28 10:36:31,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 20 transitions. [2018-11-28 10:36:31,981 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 28 letters. Loop has 4 letters. [2018-11-28 10:36:31,981 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 10:36:31,981 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 32 letters. Loop has 4 letters. [2018-11-28 10:36:31,982 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 10:36:31,982 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 28 letters. Loop has 8 letters. [2018-11-28 10:36:31,982 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 10:36:31,982 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 494 states and 656 transitions. [2018-11-28 10:36:31,985 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 42 [2018-11-28 10:36:31,987 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 494 states to 407 states and 567 transitions. [2018-11-28 10:36:31,988 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 156 [2018-11-28 10:36:31,988 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 162 [2018-11-28 10:36:31,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 407 states and 567 transitions. [2018-11-28 10:36:31,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 10:36:31,988 INFO L705 BuchiCegarLoop]: Abstraction has 407 states and 567 transitions. [2018-11-28 10:36:31,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states and 567 transitions. [2018-11-28 10:36:31,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 393. [2018-11-28 10:36:31,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2018-11-28 10:36:31,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 546 transitions. [2018-11-28 10:36:31,998 INFO L728 BuchiCegarLoop]: Abstraction has 393 states and 546 transitions. [2018-11-28 10:36:31,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-28 10:36:31,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-11-28 10:36:31,998 INFO L87 Difference]: Start difference. First operand 393 states and 546 transitions. Second operand 14 states. [2018-11-28 10:36:32,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:36:32,172 INFO L93 Difference]: Finished difference Result 274 states and 348 transitions. [2018-11-28 10:36:32,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-28 10:36:32,173 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 274 states and 348 transitions. [2018-11-28 10:36:32,175 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-28 10:36:32,176 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 274 states to 244 states and 313 transitions. [2018-11-28 10:36:32,177 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 119 [2018-11-28 10:36:32,177 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 122 [2018-11-28 10:36:32,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 244 states and 313 transitions. [2018-11-28 10:36:32,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 10:36:32,177 INFO L705 BuchiCegarLoop]: Abstraction has 244 states and 313 transitions. [2018-11-28 10:36:32,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states and 313 transitions. [2018-11-28 10:36:32,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 203. [2018-11-28 10:36:32,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-11-28 10:36:32,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 260 transitions. [2018-11-28 10:36:32,182 INFO L728 BuchiCegarLoop]: Abstraction has 203 states and 260 transitions. [2018-11-28 10:36:32,182 INFO L608 BuchiCegarLoop]: Abstraction has 203 states and 260 transitions. [2018-11-28 10:36:32,183 INFO L442 BuchiCegarLoop]: ======== Iteration 6============ [2018-11-28 10:36:32,183 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 203 states and 260 transitions. [2018-11-28 10:36:32,184 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-28 10:36:32,184 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 10:36:32,184 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 10:36:32,185 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [10, 9, 8, 7, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-11-28 10:36:32,185 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-28 10:36:32,185 INFO L794 eck$LassoCheckResult]: Stem: 6303#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 6304#L25 call main_#t~ret2 := fibo(main_~x~0);< 6333#fiboENTRY ~n := #in~n; 6400#L6 assume !(~n < 1); 6399#L8 assume !(1 == ~n); 6395#L11 call #t~ret0 := fibo(~n - 1);< 6398#fiboENTRY ~n := #in~n; 6397#L6 assume !(~n < 1); 6396#L8 assume !(1 == ~n); 6390#L11 call #t~ret0 := fibo(~n - 1);< 6394#fiboENTRY ~n := #in~n; 6392#L6 assume !(~n < 1); 6393#L8 assume !(1 == ~n); 6323#L11 call #t~ret0 := fibo(~n - 1);< 6388#fiboENTRY ~n := #in~n; 6389#L6 assume !(~n < 1); 6391#L8 assume !(1 == ~n); 6324#L11 call #t~ret0 := fibo(~n - 1);< 6388#fiboENTRY ~n := #in~n; 6389#L6 assume !(~n < 1); 6391#L8 assume !(1 == ~n); 6324#L11 call #t~ret0 := fibo(~n - 1);< 6388#fiboENTRY ~n := #in~n; 6384#L6 assume !(~n < 1); 6385#L8 assume 1 == ~n;#res := 1; 6497#fiboFINAL assume true; 6496#fiboEXIT >#32#return; 6298#L11-1 call #t~ret1 := fibo(~n - 2);< 6318#fiboENTRY ~n := #in~n; 6319#L6 assume ~n < 1;#res := 0; 6499#fiboFINAL assume true; 6297#fiboEXIT >#34#return; 6299#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 6471#fiboFINAL assume true; 6470#fiboEXIT >#32#return; 6330#L11-1 call #t~ret1 := fibo(~n - 2);< 6401#fiboENTRY ~n := #in~n; 6404#L6 assume !(~n < 1); 6484#L8 assume !(1 == ~n); 6306#L11 call #t~ret0 := fibo(~n - 1);< 6327#fiboENTRY ~n := #in~n; 6380#L6 assume !(~n < 1); 6370#L8 assume !(1 == ~n); 6352#L11 call #t~ret0 := fibo(~n - 1);< 6353#fiboENTRY ~n := #in~n; 6367#L6 assume !(~n < 1); 6365#L8 assume !(1 == ~n); 6350#L11 [2018-11-28 10:36:32,185 INFO L796 eck$LassoCheckResult]: Loop: 6350#L11 call #t~ret0 := fibo(~n - 1);< 6353#fiboENTRY ~n := #in~n; 6367#L6 assume !(~n < 1); 6365#L8 assume !(1 == ~n); 6350#L11 [2018-11-28 10:36:32,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:36:32,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1642551253, now seen corresponding path program 2 times [2018-11-28 10:36:32,185 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:36:32,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:36:32,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:36:32,186 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 10:36:32,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:36:32,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:36:32,243 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 90 proven. 19 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-11-28 10:36:32,243 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 10:36:32,243 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6fb3792e-46b4-4bcb-a8ca-805c7e9708c2/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 10:36:32,261 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 10:36:32,272 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 10:36:32,272 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 10:36:32,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:36:32,356 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 73 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-28 10:36:32,371 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 10:36:32,371 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 20 [2018-11-28 10:36:32,371 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-28 10:36:32,371 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:36:32,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 3 times [2018-11-28 10:36:32,372 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:36:32,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:36:32,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:36:32,372 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 10:36:32,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:36:32,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 10:36:32,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 10:36:32,399 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 10:36:32,399 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 10:36:32,399 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 10:36:32,399 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 10:36:32,399 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 10:36:32,400 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 10:36:32,400 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 10:36:32,400 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 10:36:32,400 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration6_Loop [2018-11-28 10:36:32,400 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 10:36:32,400 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 10:36:32,401 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:32,403 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:32,408 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:32,410 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:32,431 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 10:36:32,431 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6fb3792e-46b4-4bcb-a8ca-805c7e9708c2/bin-2019/uautomizer/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 10:36:32,437 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 10:36:32,437 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 10:36:32,452 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 10:36:32,452 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6fb3792e-46b4-4bcb-a8ca-805c7e9708c2/bin-2019/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 10:36:32,477 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 10:36:32,477 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6fb3792e-46b4-4bcb-a8ca-805c7e9708c2/bin-2019/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 10:36:32,498 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 10:36:32,498 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 10:36:38,003 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-28 10:36:38,005 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 10:36:38,005 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 10:36:38,005 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 10:36:38,005 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 10:36:38,006 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-28 10:36:38,006 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 10:36:38,006 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 10:36:38,006 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 10:36:38,006 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration6_Loop [2018-11-28 10:36:38,006 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 10:36:38,006 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 10:36:38,006 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:38,011 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:38,012 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:38,013 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:38,031 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 10:36:38,031 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-28 10:36:38,031 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 10:36:38,032 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 10:36:38,032 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 10:36:38,032 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 10:36:38,032 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 10:36:38,032 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 10:36:38,033 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 10:36:38,033 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 10:36:38,036 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-28 10:36:38,037 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-28 10:36:38,037 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-28 10:36:38,038 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-28 10:36:38,038 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-28 10:36:38,038 INFO L518 LassoAnalysis]: Proved termination. [2018-11-28 10:36:38,038 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-11-28 10:36:38,038 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-28 10:36:38,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:36:38,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:36:38,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:36:38,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:36:38,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:36:38,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 10:36:38,128 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2018-11-28 10:36:38,128 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 203 states and 260 transitions. cyclomatic complexity: 61 Second operand 6 states. [2018-11-28 10:36:38,161 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 203 states and 260 transitions. cyclomatic complexity: 61. Second operand 6 states. Result 215 states and 273 transitions. Complement of second has 18 states. [2018-11-28 10:36:38,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2018-11-28 10:36:38,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-28 10:36:38,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2018-11-28 10:36:38,162 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 47 letters. Loop has 4 letters. [2018-11-28 10:36:38,162 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 10:36:38,162 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-28 10:36:38,168 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:36:38,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:36:38,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:36:38,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:36:38,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:36:38,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 10:36:38,245 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2018-11-28 10:36:38,245 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 203 states and 260 transitions. cyclomatic complexity: 61 Second operand 6 states. [2018-11-28 10:36:38,291 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 203 states and 260 transitions. cyclomatic complexity: 61. Second operand 6 states. Result 221 states and 279 transitions. Complement of second has 17 states. [2018-11-28 10:36:38,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-11-28 10:36:38,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-28 10:36:38,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2018-11-28 10:36:38,291 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 47 letters. Loop has 4 letters. [2018-11-28 10:36:38,292 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 10:36:38,292 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-28 10:36:38,297 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:36:38,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:36:38,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:36:38,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:36:38,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:36:38,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 10:36:38,359 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2018-11-28 10:36:38,359 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 203 states and 260 transitions. cyclomatic complexity: 61 Second operand 6 states. [2018-11-28 10:36:38,395 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 203 states and 260 transitions. cyclomatic complexity: 61. Second operand 6 states. Result 271 states and 343 transitions. Complement of second has 27 states. [2018-11-28 10:36:38,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2018-11-28 10:36:38,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-28 10:36:38,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2018-11-28 10:36:38,397 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 47 letters. Loop has 4 letters. [2018-11-28 10:36:38,397 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 10:36:38,398 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 51 letters. Loop has 4 letters. [2018-11-28 10:36:38,398 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 10:36:38,398 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 47 letters. Loop has 8 letters. [2018-11-28 10:36:38,398 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 10:36:38,399 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 271 states and 343 transitions. [2018-11-28 10:36:38,401 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-28 10:36:38,403 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 271 states to 207 states and 265 transitions. [2018-11-28 10:36:38,403 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 79 [2018-11-28 10:36:38,403 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 90 [2018-11-28 10:36:38,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 207 states and 265 transitions. [2018-11-28 10:36:38,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 10:36:38,404 INFO L705 BuchiCegarLoop]: Abstraction has 207 states and 265 transitions. [2018-11-28 10:36:38,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states and 265 transitions. [2018-11-28 10:36:38,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 203. [2018-11-28 10:36:38,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-11-28 10:36:38,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 260 transitions. [2018-11-28 10:36:38,409 INFO L728 BuchiCegarLoop]: Abstraction has 203 states and 260 transitions. [2018-11-28 10:36:38,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-28 10:36:38,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2018-11-28 10:36:38,409 INFO L87 Difference]: Start difference. First operand 203 states and 260 transitions. Second operand 20 states. [2018-11-28 10:36:38,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:36:38,620 INFO L93 Difference]: Finished difference Result 344 states and 473 transitions. [2018-11-28 10:36:38,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-28 10:36:38,621 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 344 states and 473 transitions. [2018-11-28 10:36:38,623 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-28 10:36:38,626 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 344 states to 315 states and 437 transitions. [2018-11-28 10:36:38,626 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 144 [2018-11-28 10:36:38,626 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 154 [2018-11-28 10:36:38,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 315 states and 437 transitions. [2018-11-28 10:36:38,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 10:36:38,627 INFO L705 BuchiCegarLoop]: Abstraction has 315 states and 437 transitions. [2018-11-28 10:36:38,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states and 437 transitions. [2018-11-28 10:36:38,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 270. [2018-11-28 10:36:38,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2018-11-28 10:36:38,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 364 transitions. [2018-11-28 10:36:38,638 INFO L728 BuchiCegarLoop]: Abstraction has 270 states and 364 transitions. [2018-11-28 10:36:38,638 INFO L608 BuchiCegarLoop]: Abstraction has 270 states and 364 transitions. [2018-11-28 10:36:38,638 INFO L442 BuchiCegarLoop]: ======== Iteration 7============ [2018-11-28 10:36:38,638 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 270 states and 364 transitions. [2018-11-28 10:36:38,639 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-28 10:36:38,639 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 10:36:38,639 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 10:36:38,640 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [12, 11, 9, 8, 5, 3, 3, 2, 2, 2, 1, 1, 1] [2018-11-28 10:36:38,640 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-28 10:36:38,641 INFO L794 eck$LassoCheckResult]: Stem: 8504#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 8505#L25 call main_#t~ret2 := fibo(main_~x~0);< 8546#fiboENTRY ~n := #in~n; 8605#L6 assume !(~n < 1); 8603#L8 assume !(1 == ~n); 8600#L11 call #t~ret0 := fibo(~n - 1);< 8601#fiboENTRY ~n := #in~n; 8616#L6 assume !(~n < 1); 8615#L8 assume !(1 == ~n); 8610#L11 call #t~ret0 := fibo(~n - 1);< 8614#fiboENTRY ~n := #in~n; 8618#L6 assume !(~n < 1); 8612#L8 assume !(1 == ~n); 8607#L11 call #t~ret0 := fibo(~n - 1);< 8611#fiboENTRY ~n := #in~n; 8639#L6 assume !(~n < 1); 8638#L8 assume !(1 == ~n); 8536#L11 call #t~ret0 := fibo(~n - 1);< 8631#fiboENTRY ~n := #in~n; 8650#L6 assume !(~n < 1); 8649#L8 assume !(1 == ~n); 8537#L11 call #t~ret0 := fibo(~n - 1);< 8631#fiboENTRY ~n := #in~n; 8650#L6 assume !(~n < 1); 8649#L8 assume !(1 == ~n); 8537#L11 call #t~ret0 := fibo(~n - 1);< 8631#fiboENTRY ~n := #in~n; 8651#L6 assume !(~n < 1); 8699#L8 assume 1 == ~n;#res := 1; 8684#fiboFINAL assume true; 8681#fiboEXIT >#32#return; 8535#L11-1 call #t~ret1 := fibo(~n - 2);< 8538#fiboENTRY ~n := #in~n; 8677#L6 assume ~n < 1;#res := 0; 8676#fiboFINAL assume true; 8675#fiboEXIT >#34#return; 8673#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 8672#fiboFINAL assume true; 8662#fiboEXIT >#32#return; 8658#L11-1 call #t~ret1 := fibo(~n - 2);< 8659#fiboENTRY ~n := #in~n; 8668#L6 assume !(~n < 1); 8666#L8 assume 1 == ~n;#res := 1; 8554#fiboFINAL assume true; 8657#fiboEXIT >#34#return; 8621#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 8652#fiboFINAL assume true; 8626#fiboEXIT >#32#return; 8553#L11-1 call #t~ret1 := fibo(~n - 2);< 8628#fiboENTRY ~n := #in~n; 8559#L6 assume !(~n < 1); 8550#L8 assume !(1 == ~n); 8507#L11 call #t~ret0 := fibo(~n - 1);< 8540#fiboENTRY ~n := #in~n; 8755#L6 assume !(~n < 1); 8752#L8 assume !(1 == ~n); 8561#L11 call #t~ret0 := fibo(~n - 1);< 8565#fiboENTRY ~n := #in~n; 8586#L6 assume !(~n < 1); 8584#L8 assume !(1 == ~n); 8562#L11 [2018-11-28 10:36:38,641 INFO L796 eck$LassoCheckResult]: Loop: 8562#L11 call #t~ret0 := fibo(~n - 1);< 8565#fiboENTRY ~n := #in~n; 8586#L6 assume !(~n < 1); 8584#L8 assume !(1 == ~n); 8562#L11 [2018-11-28 10:36:38,641 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:36:38,641 INFO L82 PathProgramCache]: Analyzing trace with hash 272834295, now seen corresponding path program 3 times [2018-11-28 10:36:38,641 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:36:38,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:36:38,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:36:38,642 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 10:36:38,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:36:38,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:36:38,731 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 126 proven. 64 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2018-11-28 10:36:38,731 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 10:36:38,731 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6fb3792e-46b4-4bcb-a8ca-805c7e9708c2/bin-2019/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 10:36:38,743 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 10:36:38,752 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-28 10:36:38,752 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 10:36:38,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:36:38,770 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 128 proven. 21 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-11-28 10:36:38,784 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 10:36:38,784 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 19 [2018-11-28 10:36:38,785 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-28 10:36:38,785 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:36:38,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 4 times [2018-11-28 10:36:38,785 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:36:38,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:36:38,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:36:38,786 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 10:36:38,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:36:38,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 10:36:38,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 10:36:38,813 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 10:36:38,813 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 10:36:38,814 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 10:36:38,814 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 10:36:38,814 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 10:36:38,814 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 10:36:38,814 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 10:36:38,814 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 10:36:38,814 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration7_Loop [2018-11-28 10:36:38,814 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 10:36:38,814 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 10:36:38,814 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:38,815 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:38,820 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:38,821 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:38,843 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 10:36:38,843 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6fb3792e-46b4-4bcb-a8ca-805c7e9708c2/bin-2019/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 10:36:38,845 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 10:36:38,845 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 10:36:38,848 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 10:36:38,848 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6fb3792e-46b4-4bcb-a8ca-805c7e9708c2/bin-2019/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 10:36:38,863 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 10:36:38,863 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6fb3792e-46b4-4bcb-a8ca-805c7e9708c2/bin-2019/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 10:36:38,881 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 10:36:38,881 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 10:36:39,653 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-28 10:36:39,655 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 10:36:39,655 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 10:36:39,655 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 10:36:39,655 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 10:36:39,655 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-28 10:36:39,656 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 10:36:39,656 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 10:36:39,656 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 10:36:39,656 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration7_Loop [2018-11-28 10:36:39,656 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 10:36:39,656 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 10:36:39,656 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:39,657 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:39,662 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:39,663 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 10:36:39,685 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 10:36:39,685 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-28 10:36:39,686 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 10:36:39,686 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 10:36:39,686 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 10:36:39,686 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 10:36:39,686 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 10:36:39,686 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 10:36:39,686 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 10:36:39,686 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 10:36:39,687 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 10:36:39,687 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 10:36:39,687 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 10:36:39,687 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 10:36:39,687 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 10:36:39,687 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 10:36:39,687 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 10:36:39,688 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 10:36:39,688 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 10:36:39,689 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-28 10:36:39,691 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-28 10:36:39,691 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-28 10:36:39,691 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-28 10:36:39,691 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-28 10:36:39,691 INFO L518 LassoAnalysis]: Proved termination. [2018-11-28 10:36:39,691 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-11-28 10:36:39,692 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-28 10:36:39,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:36:39,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:36:39,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:36:39,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:36:39,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:36:39,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 10:36:39,775 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2018-11-28 10:36:39,775 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 270 states and 364 transitions. cyclomatic complexity: 98 Second operand 6 states. [2018-11-28 10:36:39,804 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 270 states and 364 transitions. cyclomatic complexity: 98. Second operand 6 states. Result 285 states and 380 transitions. Complement of second has 18 states. [2018-11-28 10:36:39,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2018-11-28 10:36:39,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-28 10:36:39,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2018-11-28 10:36:39,805 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 60 letters. Loop has 4 letters. [2018-11-28 10:36:39,805 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 10:36:39,805 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-28 10:36:39,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:36:39,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:36:39,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:36:39,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:36:39,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:36:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 10:36:39,886 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2018-11-28 10:36:39,886 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 270 states and 364 transitions. cyclomatic complexity: 98 Second operand 6 states. [2018-11-28 10:36:39,939 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 270 states and 364 transitions. cyclomatic complexity: 98. Second operand 6 states. Result 291 states and 386 transitions. Complement of second has 17 states. [2018-11-28 10:36:39,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-11-28 10:36:39,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-28 10:36:39,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2018-11-28 10:36:39,940 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 60 letters. Loop has 4 letters. [2018-11-28 10:36:39,940 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 10:36:39,940 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-28 10:36:39,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:36:39,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:36:39,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:36:40,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:36:40,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:36:40,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 10:36:40,022 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2018-11-28 10:36:40,022 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 270 states and 364 transitions. cyclomatic complexity: 98 Second operand 6 states. [2018-11-28 10:36:40,058 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 270 states and 364 transitions. cyclomatic complexity: 98. Second operand 6 states. Result 349 states and 462 transitions. Complement of second has 27 states. [2018-11-28 10:36:40,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2018-11-28 10:36:40,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-28 10:36:40,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2018-11-28 10:36:40,059 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 60 letters. Loop has 4 letters. [2018-11-28 10:36:40,059 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 10:36:40,059 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 64 letters. Loop has 4 letters. [2018-11-28 10:36:40,060 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 10:36:40,060 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 60 letters. Loop has 8 letters. [2018-11-28 10:36:40,060 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 10:36:40,060 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 349 states and 462 transitions. [2018-11-28 10:36:40,063 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-28 10:36:40,065 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 349 states to 274 states and 369 transitions. [2018-11-28 10:36:40,065 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 111 [2018-11-28 10:36:40,066 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 122 [2018-11-28 10:36:40,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 274 states and 369 transitions. [2018-11-28 10:36:40,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 10:36:40,066 INFO L705 BuchiCegarLoop]: Abstraction has 274 states and 369 transitions. [2018-11-28 10:36:40,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states and 369 transitions. [2018-11-28 10:36:40,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 270. [2018-11-28 10:36:40,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2018-11-28 10:36:40,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 364 transitions. [2018-11-28 10:36:40,073 INFO L728 BuchiCegarLoop]: Abstraction has 270 states and 364 transitions. [2018-11-28 10:36:40,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-28 10:36:40,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2018-11-28 10:36:40,073 INFO L87 Difference]: Start difference. First operand 270 states and 364 transitions. Second operand 19 states. [2018-11-28 10:36:40,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:36:40,320 INFO L93 Difference]: Finished difference Result 267 states and 336 transitions. [2018-11-28 10:36:40,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-28 10:36:40,321 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 267 states and 336 transitions. [2018-11-28 10:36:40,323 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-28 10:36:40,323 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 267 states to 0 states and 0 transitions. [2018-11-28 10:36:40,323 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-11-28 10:36:40,323 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-11-28 10:36:40,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-11-28 10:36:40,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-28 10:36:40,323 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 10:36:40,323 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 10:36:40,323 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 10:36:40,324 INFO L442 BuchiCegarLoop]: ======== Iteration 8============ [2018-11-28 10:36:40,324 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-11-28 10:36:40,324 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-28 10:36:40,324 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-11-28 10:36:40,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 10:36:40 BoogieIcfgContainer [2018-11-28 10:36:40,329 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-11-28 10:36:40,329 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 10:36:40,329 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 10:36:40,331 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 10:36:40,331 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 10:36:27" (3/4) ... [2018-11-28 10:36:40,333 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-28 10:36:40,333 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 10:36:40,334 INFO L168 Benchmark]: Toolchain (without parser) took 12958.77 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 196.6 MB). Free memory was 956.0 MB in the beginning and 1.1 GB in the end (delta: -131.2 MB). Peak memory consumption was 65.4 MB. Max. memory is 11.5 GB. [2018-11-28 10:36:40,335 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 10:36:40,335 INFO L168 Benchmark]: CACSL2BoogieTranslator took 144.92 ms. Allocated memory is still 1.0 GB. Free memory was 956.0 MB in the beginning and 945.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-28 10:36:40,336 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.67 ms. Allocated memory is still 1.0 GB. Free memory is still 945.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 10:36:40,336 INFO L168 Benchmark]: Boogie Preprocessor took 13.11 ms. Allocated memory is still 1.0 GB. Free memory is still 945.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 10:36:40,336 INFO L168 Benchmark]: RCFGBuilder took 150.08 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.6 MB). Free memory was 939.9 MB in the beginning and 1.1 GB in the end (delta: -177.9 MB). Peak memory consumption was 13.2 MB. Max. memory is 11.5 GB. [2018-11-28 10:36:40,337 INFO L168 Benchmark]: BuchiAutomizer took 12624.53 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 65.0 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 30.7 MB). Peak memory consumption was 95.7 MB. Max. memory is 11.5 GB. [2018-11-28 10:36:40,337 INFO L168 Benchmark]: Witness Printer took 4.47 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 10:36:40,339 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 144.92 ms. Allocated memory is still 1.0 GB. Free memory was 956.0 MB in the beginning and 945.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 18.67 ms. Allocated memory is still 1.0 GB. Free memory is still 945.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 13.11 ms. Allocated memory is still 1.0 GB. Free memory is still 945.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 150.08 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.6 MB). Free memory was 939.9 MB in the beginning and 1.1 GB in the end (delta: -177.9 MB). Peak memory consumption was 13.2 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 12624.53 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 65.0 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 30.7 MB). Peak memory consumption was 95.7 MB. Max. memory is 11.5 GB. * Witness Printer took 4.47 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 12 terminating modules (6 trivial, 2 deterministic, 4 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. 6 modules have a trivial ranking function, the largest among these consists of 20 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 12.5s and 8 iterations. TraceHistogramMax:12. Analysis of lassos took 9.3s. Construction of modules took 0.7s. Büchi inclusion checks took 2.1s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 11. Automata minimization 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 342 StatesRemovedByMinimization, 10 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 369 states and ocurred in iteration 4. Nontrivial modules had stage [2, 0, 4, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/6 HoareTripleCheckerStatistics: 239 SDtfs, 640 SDslu, 300 SDs, 0 SdLazy, 1132 SolverSat, 440 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI1 SILT5 lasso0 LassoPreprocessingBenchmarks: Lassos: inital16 mio100 ax100 hnf98 lsp93 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq187 hnf92 smp81 dnf100 smp100 tf109 neg96 sie106 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 6ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 7 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 6 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 7.4s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...