./Ultimate.py --spec ../../sv-benchmarks/c/NoOverflows.prp --file ../../sv-benchmarks/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_37a6f07a-f520-4caf-b6a6-7f1bcaec51e6/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_37a6f07a-f520-4caf-b6a6-7f1bcaec51e6/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_37a6f07a-f520-4caf-b6a6-7f1bcaec51e6/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_37a6f07a-f520-4caf-b6a6-7f1bcaec51e6/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_37a6f07a-f520-4caf-b6a6-7f1bcaec51e6/bin-2019/uautomizer/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_37a6f07a-f520-4caf-b6a6-7f1bcaec51e6/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7e40a98558d0111ea95f3ee60a44cc14c7768182 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-11-10 10:06:04,965 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 10:06:04,967 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 10:06:04,975 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 10:06:04,975 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 10:06:04,976 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 10:06:04,977 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 10:06:04,978 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 10:06:04,979 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 10:06:04,979 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 10:06:04,980 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 10:06:04,980 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 10:06:04,981 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 10:06:04,981 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 10:06:04,983 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 10:06:04,983 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 10:06:04,984 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 10:06:04,985 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 10:06:04,986 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 10:06:04,987 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 10:06:04,988 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 10:06:04,989 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 10:06:04,991 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 10:06:04,991 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 10:06:04,991 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 10:06:04,992 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 10:06:04,993 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 10:06:04,993 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 10:06:04,994 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 10:06:04,994 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 10:06:04,995 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 10:06:04,995 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 10:06:04,995 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 10:06:04,995 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 10:06:04,996 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 10:06:04,996 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 10:06:04,997 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_37a6f07a-f520-4caf-b6a6-7f1bcaec51e6/bin-2019/uautomizer/config/svcomp-Overflow-32bit-Automizer_Default.epf [2018-11-10 10:06:05,006 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 10:06:05,006 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 10:06:05,007 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 10:06:05,007 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-10 10:06:05,007 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-10 10:06:05,008 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-10 10:06:05,008 INFO L133 SettingsManager]: * Use SBE=true [2018-11-10 10:06:05,008 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 10:06:05,008 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 10:06:05,008 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-10 10:06:05,008 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 10:06:05,008 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 10:06:05,008 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 10:06:05,009 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 10:06:05,009 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 10:06:05,009 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 10:06:05,009 INFO L133 SettingsManager]: * Check absence of signed integer overflows=true [2018-11-10 10:06:05,009 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 10:06:05,009 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 10:06:05,009 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 10:06:05,009 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 10:06:05,010 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 10:06:05,012 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 10:06:05,012 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 10:06:05,012 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 10:06:05,012 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 10:06:05,012 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 10:06:05,012 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 10:06:05,012 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-10 10:06:05,012 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 10:06:05,013 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 10:06:05,013 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true 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_37a6f07a-f520-4caf-b6a6-7f1bcaec51e6/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(G ! overflow) ) 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 -> 7e40a98558d0111ea95f3ee60a44cc14c7768182 [2018-11-10 10:06:05,036 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 10:06:05,045 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 10:06:05,048 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 10:06:05,049 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 10:06:05,049 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 10:06:05,050 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_37a6f07a-f520-4caf-b6a6-7f1bcaec51e6/bin-2019/uautomizer/../../sv-benchmarks/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c [2018-11-10 10:06:05,092 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_37a6f07a-f520-4caf-b6a6-7f1bcaec51e6/bin-2019/uautomizer/data/8746e550b/47d73c228c6848ad98e67aa3d6ae11f5/FLAGcdf057c57 [2018-11-10 10:06:05,420 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 10:06:05,421 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_37a6f07a-f520-4caf-b6a6-7f1bcaec51e6/sv-benchmarks/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c [2018-11-10 10:06:05,426 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_37a6f07a-f520-4caf-b6a6-7f1bcaec51e6/bin-2019/uautomizer/data/8746e550b/47d73c228c6848ad98e67aa3d6ae11f5/FLAGcdf057c57 [2018-11-10 10:06:05,437 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_37a6f07a-f520-4caf-b6a6-7f1bcaec51e6/bin-2019/uautomizer/data/8746e550b/47d73c228c6848ad98e67aa3d6ae11f5 [2018-11-10 10:06:05,440 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 10:06:05,441 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-10 10:06:05,442 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 10:06:05,442 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 10:06:05,445 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 10:06:05,446 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:06:05" (1/1) ... [2018-11-10 10:06:05,448 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ce791db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:06:05, skipping insertion in model container [2018-11-10 10:06:05,448 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:06:05" (1/1) ... [2018-11-10 10:06:05,456 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 10:06:05,469 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 10:06:05,580 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 10:06:05,582 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 10:06:05,590 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 10:06:05,600 INFO L193 MainTranslator]: Completed translation [2018-11-10 10:06:05,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:06:05 WrapperNode [2018-11-10 10:06:05,601 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 10:06:05,601 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 10:06:05,601 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 10:06:05,601 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 10:06:05,609 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:06:05" (1/1) ... [2018-11-10 10:06:05,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:06:05" (1/1) ... [2018-11-10 10:06:05,611 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:06:05" (1/1) ... [2018-11-10 10:06:05,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:06:05" (1/1) ... [2018-11-10 10:06:05,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:06:05" (1/1) ... [2018-11-10 10:06:05,615 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:06:05" (1/1) ... [2018-11-10 10:06:05,615 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:06:05" (1/1) ... [2018-11-10 10:06:05,616 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 10:06:05,617 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 10:06:05,617 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 10:06:05,617 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 10:06:05,617 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:06:05" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37a6f07a-f520-4caf-b6a6-7f1bcaec51e6/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 10:06:05,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 10:06:05,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 10:06:05,685 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2018-11-10 10:06:05,685 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 10:06:05,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-10 10:06:05,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-11-10 10:06:05,685 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2018-11-10 10:06:05,685 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 10:06:05,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 10:06:05,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 10:06:05,795 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 10:06:05,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 10:06:05 BoogieIcfgContainer [2018-11-10 10:06:05,796 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 10:06:05,796 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 10:06:05,796 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 10:06:05,799 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 10:06:05,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 10:06:05" (1/3) ... [2018-11-10 10:06:05,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@227053ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:06:05, skipping insertion in model container [2018-11-10 10:06:05,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:06:05" (2/3) ... [2018-11-10 10:06:05,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@227053ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:06:05, skipping insertion in model container [2018-11-10 10:06:05,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 10:06:05" (3/3) ... [2018-11-10 10:06:05,801 INFO L112 eAbstractionObserver]: Analyzing ICFG Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c [2018-11-10 10:06:05,806 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 10:06:05,810 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2018-11-10 10:06:05,819 INFO L257 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2018-11-10 10:06:05,837 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 10:06:05,838 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 10:06:05,838 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 10:06:05,838 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 10:06:05,838 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 10:06:05,838 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 10:06:05,838 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 10:06:05,839 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 10:06:05,839 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 10:06:05,849 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2018-11-10 10:06:05,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-10 10:06:05,852 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:06:05,853 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:06:05,854 INFO L424 AbstractCegarLoop]: === Iteration 1 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 10:06:05,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:06:05,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1707029017, now seen corresponding path program 1 times [2018-11-10 10:06:05,861 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:06:05,861 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:06:05,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:06:05,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:06:05,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:06:05,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:06:05,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 10:06:05,976 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:06:05,976 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 10:06:05,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 10:06:05,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 10:06:05,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 10:06:05,988 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 5 states. [2018-11-10 10:06:06,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:06:06,078 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2018-11-10 10:06:06,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 10:06:06,079 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2018-11-10 10:06:06,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:06:06,085 INFO L225 Difference]: With dead ends: 38 [2018-11-10 10:06:06,085 INFO L226 Difference]: Without dead ends: 25 [2018-11-10 10:06:06,087 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-10 10:06:06,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-11-10 10:06:06,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-11-10 10:06:06,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-11-10 10:06:06,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2018-11-10 10:06:06,110 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 10 [2018-11-10 10:06:06,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:06:06,111 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2018-11-10 10:06:06,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 10:06:06,111 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2018-11-10 10:06:06,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-10 10:06:06,112 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:06:06,112 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:06:06,112 INFO L424 AbstractCegarLoop]: === Iteration 2 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 10:06:06,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:06:06,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1378291933, now seen corresponding path program 1 times [2018-11-10 10:06:06,113 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:06:06,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:06:06,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:06:06,114 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:06:06,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:06:06,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:06:06,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 10:06:06,147 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:06:06,147 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-10 10:06:06,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-10 10:06:06,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-10 10:06:06,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-10 10:06:06,149 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 3 states. [2018-11-10 10:06:06,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:06:06,165 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2018-11-10 10:06:06,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-10 10:06:06,165 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-11-10 10:06:06,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:06:06,167 INFO L225 Difference]: With dead ends: 27 [2018-11-10 10:06:06,168 INFO L226 Difference]: Without dead ends: 25 [2018-11-10 10:06:06,168 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-10 10:06:06,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-11-10 10:06:06,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2018-11-10 10:06:06,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-10 10:06:06,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2018-11-10 10:06:06,175 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 11 [2018-11-10 10:06:06,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:06:06,175 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2018-11-10 10:06:06,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-10 10:06:06,175 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2018-11-10 10:06:06,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-11-10 10:06:06,176 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:06:06,176 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:06:06,176 INFO L424 AbstractCegarLoop]: === Iteration 3 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 10:06:06,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:06:06,177 INFO L82 PathProgramCache]: Analyzing trace with hash -995069271, now seen corresponding path program 1 times [2018-11-10 10:06:06,177 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:06:06,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:06:06,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:06:06,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:06:06,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:06:06,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:06:06,264 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 10:06:06,264 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:06:06,264 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37a6f07a-f520-4caf-b6a6-7f1bcaec51e6/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 10:06:06,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:06:06,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:06:06,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:06:06,382 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 10:06:06,399 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:06:06,399 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 11 [2018-11-10 10:06:06,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-10 10:06:06,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-10 10:06:06,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2018-11-10 10:06:06,400 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 11 states. [2018-11-10 10:06:06,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:06:06,580 INFO L93 Difference]: Finished difference Result 78 states and 104 transitions. [2018-11-10 10:06:06,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 10:06:06,580 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2018-11-10 10:06:06,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:06:06,581 INFO L225 Difference]: With dead ends: 78 [2018-11-10 10:06:06,581 INFO L226 Difference]: Without dead ends: 59 [2018-11-10 10:06:06,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2018-11-10 10:06:06,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-11-10 10:06:06,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2018-11-10 10:06:06,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-11-10 10:06:06,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2018-11-10 10:06:06,590 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 32 [2018-11-10 10:06:06,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:06:06,590 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2018-11-10 10:06:06,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-10 10:06:06,590 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2018-11-10 10:06:06,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-11-10 10:06:06,591 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:06:06,591 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:06:06,592 INFO L424 AbstractCegarLoop]: === Iteration 4 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 10:06:06,592 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:06:06,592 INFO L82 PathProgramCache]: Analyzing trace with hash 131544367, now seen corresponding path program 1 times [2018-11-10 10:06:06,592 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:06:06,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:06:06,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:06:06,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:06:06,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:06:06,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:06:06,639 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-11-10 10:06:06,639 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:06:06,639 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 10:06:06,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 10:06:06,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 10:06:06,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 10:06:06,640 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand 5 states. [2018-11-10 10:06:06,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:06:06,693 INFO L93 Difference]: Finished difference Result 78 states and 101 transitions. [2018-11-10 10:06:06,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 10:06:06,693 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2018-11-10 10:06:06,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:06:06,695 INFO L225 Difference]: With dead ends: 78 [2018-11-10 10:06:06,696 INFO L226 Difference]: Without dead ends: 77 [2018-11-10 10:06:06,696 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-10 10:06:06,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-11-10 10:06:06,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2018-11-10 10:06:06,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-11-10 10:06:06,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2018-11-10 10:06:06,707 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 34 [2018-11-10 10:06:06,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:06:06,707 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2018-11-10 10:06:06,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 10:06:06,707 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2018-11-10 10:06:06,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-11-10 10:06:06,708 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:06:06,708 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:06:06,709 INFO L424 AbstractCegarLoop]: === Iteration 5 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 10:06:06,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:06:06,709 INFO L82 PathProgramCache]: Analyzing trace with hash -217091865, now seen corresponding path program 1 times [2018-11-10 10:06:06,709 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:06:06,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:06:06,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:06:06,710 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:06:06,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:06:06,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:06:06,752 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-10 10:06:06,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:06:06,753 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37a6f07a-f520-4caf-b6a6-7f1bcaec51e6/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 10:06:06,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:06:06,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:06:06,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:06:06,845 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 10:06:06,861 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:06:06,861 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9] total 12 [2018-11-10 10:06:06,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 10:06:06,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 10:06:06,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-11-10 10:06:06,862 INFO L87 Difference]: Start difference. First operand 67 states and 85 transitions. Second operand 12 states. [2018-11-10 10:06:07,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:06:07,129 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2018-11-10 10:06:07,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-10 10:06:07,129 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2018-11-10 10:06:07,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:06:07,130 INFO L225 Difference]: With dead ends: 115 [2018-11-10 10:06:07,130 INFO L226 Difference]: Without dead ends: 70 [2018-11-10 10:06:07,131 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2018-11-10 10:06:07,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-11-10 10:06:07,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2018-11-10 10:06:07,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-11-10 10:06:07,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2018-11-10 10:06:07,139 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 35 [2018-11-10 10:06:07,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:06:07,139 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2018-11-10 10:06:07,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 10:06:07,140 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2018-11-10 10:06:07,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-11-10 10:06:07,141 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:06:07,141 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:06:07,142 INFO L424 AbstractCegarLoop]: === Iteration 6 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 10:06:07,142 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:06:07,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1444124818, now seen corresponding path program 1 times [2018-11-10 10:06:07,142 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:06:07,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:06:07,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:06:07,143 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:06:07,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:06:07,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:06:07,193 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 27 proven. 18 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2018-11-10 10:06:07,193 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:06:07,193 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37a6f07a-f520-4caf-b6a6-7f1bcaec51e6/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 10:06:07,202 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:06:07,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:06:07,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:06:07,305 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 47 proven. 27 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-10 10:06:07,320 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:06:07,320 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 14 [2018-11-10 10:06:07,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-10 10:06:07,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-10 10:06:07,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2018-11-10 10:06:07,321 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand 14 states. [2018-11-10 10:06:07,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:06:07,529 INFO L93 Difference]: Finished difference Result 136 states and 178 transitions. [2018-11-10 10:06:07,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-10 10:06:07,532 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 59 [2018-11-10 10:06:07,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:06:07,533 INFO L225 Difference]: With dead ends: 136 [2018-11-10 10:06:07,533 INFO L226 Difference]: Without dead ends: 89 [2018-11-10 10:06:07,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2018-11-10 10:06:07,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-11-10 10:06:07,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2018-11-10 10:06:07,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-11-10 10:06:07,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 98 transitions. [2018-11-10 10:06:07,544 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 98 transitions. Word has length 59 [2018-11-10 10:06:07,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:06:07,544 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 98 transitions. [2018-11-10 10:06:07,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-10 10:06:07,545 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 98 transitions. [2018-11-10 10:06:07,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-11-10 10:06:07,546 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:06:07,546 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 6, 6, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:06:07,547 INFO L424 AbstractCegarLoop]: === Iteration 7 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 10:06:07,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:06:07,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1675070914, now seen corresponding path program 2 times [2018-11-10 10:06:07,548 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:06:07,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:06:07,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:06:07,549 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:06:07,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:06:07,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:06:07,590 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-11-10 10:06:07,590 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:06:07,590 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 10:06:07,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 10:06:07,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 10:06:07,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 10:06:07,591 INFO L87 Difference]: Start difference. First operand 83 states and 98 transitions. Second operand 5 states. [2018-11-10 10:06:07,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:06:07,608 INFO L93 Difference]: Finished difference Result 86 states and 101 transitions. [2018-11-10 10:06:07,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 10:06:07,609 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2018-11-10 10:06:07,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:06:07,610 INFO L225 Difference]: With dead ends: 86 [2018-11-10 10:06:07,610 INFO L226 Difference]: Without dead ends: 85 [2018-11-10 10:06:07,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-10 10:06:07,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-11-10 10:06:07,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-11-10 10:06:07,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-11-10 10:06:07,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 100 transitions. [2018-11-10 10:06:07,616 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 100 transitions. Word has length 70 [2018-11-10 10:06:07,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:06:07,617 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 100 transitions. [2018-11-10 10:06:07,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 10:06:07,617 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 100 transitions. [2018-11-10 10:06:07,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-11-10 10:06:07,617 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:06:07,617 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:06:07,618 INFO L424 AbstractCegarLoop]: === Iteration 8 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 10:06:07,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:06:07,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1909772650, now seen corresponding path program 1 times [2018-11-10 10:06:07,618 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:06:07,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:06:07,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:06:07,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 10:06:07,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:06:07,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:06:07,650 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2018-11-10 10:06:07,650 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:06:07,650 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 10:06:07,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 10:06:07,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 10:06:07,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 10:06:07,651 INFO L87 Difference]: Start difference. First operand 85 states and 100 transitions. Second operand 5 states. [2018-11-10 10:06:07,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:06:07,688 INFO L93 Difference]: Finished difference Result 89 states and 105 transitions. [2018-11-10 10:06:07,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 10:06:07,688 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2018-11-10 10:06:07,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:06:07,689 INFO L225 Difference]: With dead ends: 89 [2018-11-10 10:06:07,689 INFO L226 Difference]: Without dead ends: 88 [2018-11-10 10:06:07,689 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-10 10:06:07,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-11-10 10:06:07,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-11-10 10:06:07,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-11-10 10:06:07,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2018-11-10 10:06:07,697 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 65 [2018-11-10 10:06:07,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:06:07,697 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2018-11-10 10:06:07,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 10:06:07,698 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2018-11-10 10:06:07,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-11-10 10:06:07,698 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:06:07,699 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:06:07,699 INFO L424 AbstractCegarLoop]: === Iteration 9 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 10:06:07,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:06:07,699 INFO L82 PathProgramCache]: Analyzing trace with hash 399082410, now seen corresponding path program 3 times [2018-11-10 10:06:07,699 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:06:07,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:06:07,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:06:07,700 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:06:07,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:06:07,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:06:07,763 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-10 10:06:07,763 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:06:07,763 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37a6f07a-f520-4caf-b6a6-7f1bcaec51e6/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 10:06:07,768 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 10:06:07,778 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-10 10:06:07,778 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 10:06:07,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:06:07,798 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-10 10:06:07,815 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:06:07,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-11-10 10:06:07,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-10 10:06:07,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-10 10:06:07,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-11-10 10:06:07,816 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand 9 states. [2018-11-10 10:06:07,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:06:07,850 INFO L93 Difference]: Finished difference Result 120 states and 152 transitions. [2018-11-10 10:06:07,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-10 10:06:07,850 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 71 [2018-11-10 10:06:07,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:06:07,851 INFO L225 Difference]: With dead ends: 120 [2018-11-10 10:06:07,851 INFO L226 Difference]: Without dead ends: 119 [2018-11-10 10:06:07,852 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-11-10 10:06:07,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-11-10 10:06:07,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 105. [2018-11-10 10:06:07,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-11-10 10:06:07,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 132 transitions. [2018-11-10 10:06:07,861 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 132 transitions. Word has length 71 [2018-11-10 10:06:07,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:06:07,861 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 132 transitions. [2018-11-10 10:06:07,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-10 10:06:07,861 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 132 transitions. [2018-11-10 10:06:07,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-11-10 10:06:07,862 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:06:07,863 INFO L375 BasicCegarLoop]: trace histogram [12, 10, 8, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:06:07,863 INFO L424 AbstractCegarLoop]: === Iteration 10 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 10:06:07,863 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:06:07,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1150834304, now seen corresponding path program 4 times [2018-11-10 10:06:07,863 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:06:07,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:06:07,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:06:07,864 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 10:06:07,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:06:07,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:06:07,932 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 101 proven. 92 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2018-11-10 10:06:07,932 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:06:07,932 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37a6f07a-f520-4caf-b6a6-7f1bcaec51e6/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 10:06:07,937 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 10:06:07,958 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 10:06:07,958 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 10:06:07,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:06:08,044 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 176 proven. 86 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-11-10 10:06:08,061 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:06:08,061 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 18 [2018-11-10 10:06:08,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-10 10:06:08,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-10 10:06:08,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2018-11-10 10:06:08,062 INFO L87 Difference]: Start difference. First operand 105 states and 132 transitions. Second operand 18 states. [2018-11-10 10:06:08,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:06:08,387 INFO L93 Difference]: Finished difference Result 224 states and 302 transitions. [2018-11-10 10:06:08,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-10 10:06:08,387 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 104 [2018-11-10 10:06:08,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:06:08,388 INFO L225 Difference]: With dead ends: 224 [2018-11-10 10:06:08,388 INFO L226 Difference]: Without dead ends: 137 [2018-11-10 10:06:08,389 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2018-11-10 10:06:08,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-11-10 10:06:08,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 126. [2018-11-10 10:06:08,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-11-10 10:06:08,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 156 transitions. [2018-11-10 10:06:08,397 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 156 transitions. Word has length 104 [2018-11-10 10:06:08,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:06:08,398 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 156 transitions. [2018-11-10 10:06:08,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-10 10:06:08,398 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 156 transitions. [2018-11-10 10:06:08,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-10 10:06:08,400 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:06:08,400 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 8, 8, 8, 8, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:06:08,400 INFO L424 AbstractCegarLoop]: === Iteration 11 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 10:06:08,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:06:08,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1659895493, now seen corresponding path program 5 times [2018-11-10 10:06:08,400 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:06:08,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:06:08,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:06:08,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 10:06:08,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:06:08,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:06:08,529 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 105 proven. 34 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2018-11-10 10:06:08,529 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:06:08,529 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37a6f07a-f520-4caf-b6a6-7f1bcaec51e6/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 10:06:08,538 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 10:06:08,566 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2018-11-10 10:06:08,566 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 10:06:08,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:06:08,585 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 114 proven. 37 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2018-11-10 10:06:08,605 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:06:08,605 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2018-11-10 10:06:08,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 10:06:08,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 10:06:08,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-11-10 10:06:08,606 INFO L87 Difference]: Start difference. First operand 126 states and 156 transitions. Second operand 12 states. [2018-11-10 10:06:08,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:06:08,739 INFO L93 Difference]: Finished difference Result 231 states and 296 transitions. [2018-11-10 10:06:08,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 10:06:08,740 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 97 [2018-11-10 10:06:08,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:06:08,741 INFO L225 Difference]: With dead ends: 231 [2018-11-10 10:06:08,741 INFO L226 Difference]: Without dead ends: 123 [2018-11-10 10:06:08,743 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2018-11-10 10:06:08,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-11-10 10:06:08,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 111. [2018-11-10 10:06:08,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-11-10 10:06:08,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 128 transitions. [2018-11-10 10:06:08,751 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 128 transitions. Word has length 97 [2018-11-10 10:06:08,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:06:08,752 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 128 transitions. [2018-11-10 10:06:08,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 10:06:08,752 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 128 transitions. [2018-11-10 10:06:08,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-11-10 10:06:08,753 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:06:08,753 INFO L375 BasicCegarLoop]: trace histogram [19, 16, 13, 11, 11, 11, 11, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:06:08,754 INFO L424 AbstractCegarLoop]: === Iteration 12 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 10:06:08,754 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:06:08,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1038703409, now seen corresponding path program 6 times [2018-11-10 10:06:08,754 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:06:08,754 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:06:08,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:06:08,755 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 10:06:08,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:06:08,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:06:08,983 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 244 proven. 362 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-11-10 10:06:08,984 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:06:08,984 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37a6f07a-f520-4caf-b6a6-7f1bcaec51e6/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 [2018-11-10 10:06:08,996 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 10:06:09,058 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2018-11-10 10:06:09,058 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 10:06:09,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:06:09,198 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 173 proven. 35 refuted. 0 times theorem prover too weak. 699 trivial. 0 not checked. [2018-11-10 10:06:09,214 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:06:09,214 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 29 [2018-11-10 10:06:09,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-10 10:06:09,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-10 10:06:09,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2018-11-10 10:06:09,214 INFO L87 Difference]: Start difference. First operand 111 states and 128 transitions. Second operand 29 states. [2018-11-10 10:06:10,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:06:10,171 INFO L93 Difference]: Finished difference Result 254 states and 295 transitions. [2018-11-10 10:06:10,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-11-10 10:06:10,172 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 164 [2018-11-10 10:06:10,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:06:10,173 INFO L225 Difference]: With dead ends: 254 [2018-11-10 10:06:10,173 INFO L226 Difference]: Without dead ends: 161 [2018-11-10 10:06:10,175 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1232, Invalid=3460, Unknown=0, NotChecked=0, Total=4692 [2018-11-10 10:06:10,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-11-10 10:06:10,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 146. [2018-11-10 10:06:10,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-11-10 10:06:10,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 166 transitions. [2018-11-10 10:06:10,183 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 166 transitions. Word has length 164 [2018-11-10 10:06:10,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:06:10,183 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 166 transitions. [2018-11-10 10:06:10,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-10 10:06:10,184 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 166 transitions. [2018-11-10 10:06:10,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-11-10 10:06:10,184 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:06:10,185 INFO L375 BasicCegarLoop]: trace histogram [13, 11, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:06:10,185 INFO L424 AbstractCegarLoop]: === Iteration 13 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 10:06:10,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:06:10,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1066732972, now seen corresponding path program 2 times [2018-11-10 10:06:10,185 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:06:10,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:06:10,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:06:10,186 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 10:06:10,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:06:10,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:06:10,255 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 62 proven. 5 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2018-11-10 10:06:10,255 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:06:10,255 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37a6f07a-f520-4caf-b6a6-7f1bcaec51e6/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 10:06:10,264 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 10:06:10,286 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 10:06:10,286 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 10:06:10,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:06:10,464 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 163 proven. 188 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-11-10 10:06:10,487 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:06:10,487 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 17] total 23 [2018-11-10 10:06:10,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-10 10:06:10,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-10 10:06:10,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2018-11-10 10:06:10,488 INFO L87 Difference]: Start difference. First operand 146 states and 166 transitions. Second operand 23 states. [2018-11-10 10:06:11,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:06:11,090 INFO L93 Difference]: Finished difference Result 293 states and 341 transitions. [2018-11-10 10:06:11,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-10 10:06:11,091 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 111 [2018-11-10 10:06:11,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:06:11,091 INFO L225 Difference]: With dead ends: 293 [2018-11-10 10:06:11,091 INFO L226 Difference]: Without dead ends: 164 [2018-11-10 10:06:11,092 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=478, Invalid=2278, Unknown=0, NotChecked=0, Total=2756 [2018-11-10 10:06:11,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-11-10 10:06:11,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 159. [2018-11-10 10:06:11,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-11-10 10:06:11,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 177 transitions. [2018-11-10 10:06:11,099 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 177 transitions. Word has length 111 [2018-11-10 10:06:11,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:06:11,099 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 177 transitions. [2018-11-10 10:06:11,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-10 10:06:11,099 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 177 transitions. [2018-11-10 10:06:11,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-11-10 10:06:11,100 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:06:11,101 INFO L375 BasicCegarLoop]: trace histogram [17, 15, 11, 11, 11, 11, 10, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:06:11,101 INFO L424 AbstractCegarLoop]: === Iteration 14 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 10:06:11,101 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:06:11,101 INFO L82 PathProgramCache]: Analyzing trace with hash -301830381, now seen corresponding path program 7 times [2018-11-10 10:06:11,101 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:06:11,101 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:06:11,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:06:11,102 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 10:06:11,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:06:11,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:06:11,281 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 160 proven. 384 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2018-11-10 10:06:11,281 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:06:11,281 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37a6f07a-f520-4caf-b6a6-7f1bcaec51e6/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 10:06:11,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:06:11,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:06:11,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:06:11,339 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 454 proven. 155 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2018-11-10 10:06:11,356 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:06:11,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 24 [2018-11-10 10:06:11,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-10 10:06:11,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-10 10:06:11,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2018-11-10 10:06:11,357 INFO L87 Difference]: Start difference. First operand 159 states and 177 transitions. Second operand 24 states. [2018-11-10 10:06:11,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:06:11,844 INFO L93 Difference]: Finished difference Result 324 states and 364 transitions. [2018-11-10 10:06:11,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-10 10:06:11,845 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 142 [2018-11-10 10:06:11,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:06:11,846 INFO L225 Difference]: With dead ends: 324 [2018-11-10 10:06:11,846 INFO L226 Difference]: Without dead ends: 163 [2018-11-10 10:06:11,847 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=797, Invalid=1959, Unknown=0, NotChecked=0, Total=2756 [2018-11-10 10:06:11,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-11-10 10:06:11,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 156. [2018-11-10 10:06:11,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-11-10 10:06:11,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 169 transitions. [2018-11-10 10:06:11,853 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 169 transitions. Word has length 142 [2018-11-10 10:06:11,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:06:11,853 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 169 transitions. [2018-11-10 10:06:11,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-10 10:06:11,853 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 169 transitions. [2018-11-10 10:06:11,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-11-10 10:06:11,855 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:06:11,855 INFO L375 BasicCegarLoop]: trace histogram [19, 16, 14, 11, 11, 11, 11, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:06:11,855 INFO L424 AbstractCegarLoop]: === Iteration 15 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 10:06:11,855 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:06:11,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1226786477, now seen corresponding path program 8 times [2018-11-10 10:06:11,855 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:06:11,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:06:11,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:06:11,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:06:11,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:06:11,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:06:11,955 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 78 proven. 129 refuted. 0 times theorem prover too weak. 743 trivial. 0 not checked. [2018-11-10 10:06:11,955 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:06:11,956 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37a6f07a-f520-4caf-b6a6-7f1bcaec51e6/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 [2018-11-10 10:06:11,962 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 10:06:11,990 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 10:06:11,990 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 10:06:11,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:06:12,061 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 78 proven. 129 refuted. 0 times theorem prover too weak. 743 trivial. 0 not checked. [2018-11-10 10:06:12,078 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:06:12,078 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2018-11-10 10:06:12,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-10 10:06:12,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-10 10:06:12,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2018-11-10 10:06:12,079 INFO L87 Difference]: Start difference. First operand 156 states and 169 transitions. Second operand 17 states. [2018-11-10 10:06:12,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:06:12,125 INFO L93 Difference]: Finished difference Result 157 states and 169 transitions. [2018-11-10 10:06:12,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-10 10:06:12,125 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 169 [2018-11-10 10:06:12,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:06:12,126 INFO L225 Difference]: With dead ends: 157 [2018-11-10 10:06:12,126 INFO L226 Difference]: Without dead ends: 156 [2018-11-10 10:06:12,126 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2018-11-10 10:06:12,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-11-10 10:06:12,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-11-10 10:06:12,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-11-10 10:06:12,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 168 transitions. [2018-11-10 10:06:12,132 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 168 transitions. Word has length 169 [2018-11-10 10:06:12,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:06:12,132 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 168 transitions. [2018-11-10 10:06:12,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-10 10:06:12,133 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 168 transitions. [2018-11-10 10:06:12,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2018-11-10 10:06:12,138 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:06:12,139 INFO L375 BasicCegarLoop]: trace histogram [28, 24, 23, 15, 15, 15, 15, 12, 12, 12, 12, 12, 12, 12, 11, 11, 8, 5, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:06:12,139 INFO L424 AbstractCegarLoop]: === Iteration 16 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 10:06:12,139 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:06:12,139 INFO L82 PathProgramCache]: Analyzing trace with hash -333231388, now seen corresponding path program 9 times [2018-11-10 10:06:12,139 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:06:12,139 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:06:12,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:06:12,140 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 10:06:12,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:06:12,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:06:12,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2327 backedges. 272 proven. 389 refuted. 0 times theorem prover too weak. 1666 trivial. 0 not checked. [2018-11-10 10:06:12,279 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:06:12,279 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37a6f07a-f520-4caf-b6a6-7f1bcaec51e6/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 10:06:12,286 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 10:06:12,328 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-11-10 10:06:12,328 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 10:06:12,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:06:12,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2327 backedges. 272 proven. 389 refuted. 0 times theorem prover too weak. 1666 trivial. 0 not checked. [2018-11-10 10:06:12,446 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:06:12,447 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 20 [2018-11-10 10:06:12,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-10 10:06:12,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-10 10:06:12,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2018-11-10 10:06:12,448 INFO L87 Difference]: Start difference. First operand 156 states and 168 transitions. Second operand 21 states. [2018-11-10 10:06:12,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:06:12,551 INFO L93 Difference]: Finished difference Result 157 states and 168 transitions. [2018-11-10 10:06:12,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-10 10:06:12,552 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 261 [2018-11-10 10:06:12,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:06:12,554 INFO L225 Difference]: With dead ends: 157 [2018-11-10 10:06:12,554 INFO L226 Difference]: Without dead ends: 156 [2018-11-10 10:06:12,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2018-11-10 10:06:12,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-11-10 10:06:12,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-11-10 10:06:12,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-11-10 10:06:12,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 167 transitions. [2018-11-10 10:06:12,562 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 167 transitions. Word has length 261 [2018-11-10 10:06:12,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:06:12,563 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 167 transitions. [2018-11-10 10:06:12,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-10 10:06:12,563 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 167 transitions. [2018-11-10 10:06:12,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2018-11-10 10:06:12,565 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:06:12,565 INFO L375 BasicCegarLoop]: trace histogram [43, 40, 35, 22, 22, 22, 22, 20, 20, 20, 20, 20, 20, 20, 19, 19, 13, 8, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:06:12,565 INFO L424 AbstractCegarLoop]: === Iteration 17 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 10:06:12,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:06:12,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1881532310, now seen corresponding path program 10 times [2018-11-10 10:06:12,566 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:06:12,566 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:06:12,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:06:12,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 10:06:12,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:06:12,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:06:12,822 INFO L134 CoverageAnalysis]: Checked inductivity of 5965 backedges. 820 proven. 1093 refuted. 0 times theorem prover too weak. 4052 trivial. 0 not checked. [2018-11-10 10:06:12,823 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:06:12,823 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37a6f07a-f520-4caf-b6a6-7f1bcaec51e6/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 10:06:12,828 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 10:06:12,878 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 10:06:12,878 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 10:06:12,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:06:13,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5965 backedges. 820 proven. 1093 refuted. 0 times theorem prover too weak. 4052 trivial. 0 not checked. [2018-11-10 10:06:13,056 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:06:13,056 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 24 [2018-11-10 10:06:13,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-10 10:06:13,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-10 10:06:13,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2018-11-10 10:06:13,057 INFO L87 Difference]: Start difference. First operand 156 states and 167 transitions. Second operand 25 states. [2018-11-10 10:06:13,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:06:13,110 INFO L93 Difference]: Finished difference Result 157 states and 167 transitions. [2018-11-10 10:06:13,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-10 10:06:13,111 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 412 [2018-11-10 10:06:13,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:06:13,111 INFO L225 Difference]: With dead ends: 157 [2018-11-10 10:06:13,111 INFO L226 Difference]: Without dead ends: 156 [2018-11-10 10:06:13,112 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 469 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2018-11-10 10:06:13,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-11-10 10:06:13,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-11-10 10:06:13,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-11-10 10:06:13,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 166 transitions. [2018-11-10 10:06:13,117 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 166 transitions. Word has length 412 [2018-11-10 10:06:13,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:06:13,117 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 166 transitions. [2018-11-10 10:06:13,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-10 10:06:13,118 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 166 transitions. [2018-11-10 10:06:13,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 662 [2018-11-10 10:06:13,120 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:06:13,121 INFO L375 BasicCegarLoop]: trace histogram [68, 66, 55, 34, 34, 34, 34, 33, 33, 33, 33, 33, 33, 33, 32, 32, 21, 13, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:06:13,121 INFO L424 AbstractCegarLoop]: === Iteration 18 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 10:06:13,121 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:06:13,121 INFO L82 PathProgramCache]: Analyzing trace with hash 355145621, now seen corresponding path program 11 times [2018-11-10 10:06:13,121 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:06:13,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:06:13,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:06:13,122 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 10:06:13,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:06:13,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:06:13,509 INFO L134 CoverageAnalysis]: Checked inductivity of 15678 backedges. 2390 proven. 2946 refuted. 0 times theorem prover too weak. 10342 trivial. 0 not checked. [2018-11-10 10:06:13,510 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:06:13,510 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37a6f07a-f520-4caf-b6a6-7f1bcaec51e6/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 [2018-11-10 10:06:13,517 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 10:06:13,695 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2018-11-10 10:06:13,695 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 10:06:13,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:06:14,007 INFO L134 CoverageAnalysis]: Checked inductivity of 15678 backedges. 2390 proven. 2946 refuted. 0 times theorem prover too weak. 10342 trivial. 0 not checked. [2018-11-10 10:06:14,024 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:06:14,024 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 28 [2018-11-10 10:06:14,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-10 10:06:14,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-10 10:06:14,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2018-11-10 10:06:14,026 INFO L87 Difference]: Start difference. First operand 156 states and 166 transitions. Second operand 29 states. [2018-11-10 10:06:14,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:06:14,096 INFO L93 Difference]: Finished difference Result 157 states and 166 transitions. [2018-11-10 10:06:14,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-10 10:06:14,096 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 661 [2018-11-10 10:06:14,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:06:14,098 INFO L225 Difference]: With dead ends: 157 [2018-11-10 10:06:14,098 INFO L226 Difference]: Without dead ends: 156 [2018-11-10 10:06:14,098 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 793 GetRequests, 766 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2018-11-10 10:06:14,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-11-10 10:06:14,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-11-10 10:06:14,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-11-10 10:06:14,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 165 transitions. [2018-11-10 10:06:14,104 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 165 transitions. Word has length 661 [2018-11-10 10:06:14,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:06:14,105 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 165 transitions. [2018-11-10 10:06:14,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-10 10:06:14,105 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 165 transitions. [2018-11-10 10:06:14,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1068 [2018-11-10 10:06:14,109 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:06:14,110 INFO L375 BasicCegarLoop]: trace histogram [109, 108, 88, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 53, 53, 34, 21, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:06:14,110 INFO L424 AbstractCegarLoop]: === Iteration 19 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 10:06:14,110 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:06:14,110 INFO L82 PathProgramCache]: Analyzing trace with hash -642383590, now seen corresponding path program 12 times [2018-11-10 10:06:14,110 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:06:14,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:06:14,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:06:14,111 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 10:06:14,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:06:14,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:06:14,883 INFO L134 CoverageAnalysis]: Checked inductivity of 41413 backedges. 6686 proven. 7802 refuted. 0 times theorem prover too weak. 26925 trivial. 0 not checked. [2018-11-10 10:06:14,884 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:06:14,884 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37a6f07a-f520-4caf-b6a6-7f1bcaec51e6/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 10:06:14,889 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 10:06:15,184 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 83 check-sat command(s) [2018-11-10 10:06:15,185 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 10:06:15,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:06:15,936 INFO L134 CoverageAnalysis]: Checked inductivity of 41413 backedges. 6686 proven. 7802 refuted. 0 times theorem prover too weak. 26925 trivial. 0 not checked. [2018-11-10 10:06:15,964 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:06:15,964 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 32 [2018-11-10 10:06:15,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-11-10 10:06:15,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-11-10 10:06:15,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=817, Unknown=0, NotChecked=0, Total=1056 [2018-11-10 10:06:15,966 INFO L87 Difference]: Start difference. First operand 156 states and 165 transitions. Second operand 33 states. [2018-11-10 10:06:16,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:06:16,133 INFO L93 Difference]: Finished difference Result 156 states and 165 transitions. [2018-11-10 10:06:16,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-10 10:06:16,134 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 1067 [2018-11-10 10:06:16,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:06:16,135 INFO L225 Difference]: With dead ends: 156 [2018-11-10 10:06:16,135 INFO L226 Difference]: Without dead ends: 0 [2018-11-10 10:06:16,136 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1283 GetRequests, 1252 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=817, Unknown=0, NotChecked=0, Total=1056 [2018-11-10 10:06:16,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-10 10:06:16,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-10 10:06:16,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-10 10:06:16,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-10 10:06:16,136 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1067 [2018-11-10 10:06:16,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:06:16,137 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-10 10:06:16,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-11-10 10:06:16,137 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-10 10:06:16,137 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-10 10:06:16,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-10 10:06:16,960 WARN L179 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 48 [2018-11-10 10:06:17,109 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 13 [2018-11-10 10:06:17,111 INFO L425 ceAbstractionStarter]: For program point fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-11-10 10:06:17,111 INFO L425 ceAbstractionStarter]: For program point fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-11-10 10:06:17,111 INFO L425 ceAbstractionStarter]: For program point fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-11-10 10:06:17,111 INFO L425 ceAbstractionStarter]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2018-11-10 10:06:17,111 INFO L425 ceAbstractionStarter]: For program point L17(lines 17 21) no Hoare annotation was computed. [2018-11-10 10:06:17,111 INFO L425 ceAbstractionStarter]: For program point L15(lines 15 21) no Hoare annotation was computed. [2018-11-10 10:06:17,111 INFO L425 ceAbstractionStarter]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2018-11-10 10:06:17,112 INFO L425 ceAbstractionStarter]: For program point fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-11-10 10:06:17,112 INFO L425 ceAbstractionStarter]: For program point fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-11-10 10:06:17,112 INFO L428 ceAbstractionStarter]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2018-11-10 10:06:17,112 INFO L425 ceAbstractionStarter]: For program point L20(line 20) no Hoare annotation was computed. [2018-11-10 10:06:17,112 INFO L425 ceAbstractionStarter]: For program point L20-1(line 20) no Hoare annotation was computed. [2018-11-10 10:06:17,112 INFO L425 ceAbstractionStarter]: For program point fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-11-10 10:06:17,112 INFO L421 ceAbstractionStarter]: At program point L20-2(line 20) the Hoare annotation is: (and (< 1 |fibonacci_#in~n|) (or (and (<= |fibonacci_#in~n| fibonacci_~n) (<= fibonacci_~n |fibonacci_#in~n|)) (< 9 |fibonacci_#in~n|))) [2018-11-10 10:06:17,112 INFO L425 ceAbstractionStarter]: For program point L20-3(line 20) no Hoare annotation was computed. [2018-11-10 10:06:17,112 INFO L425 ceAbstractionStarter]: For program point L20-4(line 20) no Hoare annotation was computed. [2018-11-10 10:06:17,112 INFO L425 ceAbstractionStarter]: For program point L20-5(line 20) no Hoare annotation was computed. [2018-11-10 10:06:17,113 INFO L421 ceAbstractionStarter]: At program point L20-6(line 20) the Hoare annotation is: (and (or (and (<= |fibonacci_#t~ret0| 21) (<= |fibonacci_#in~n| fibonacci_~n) (<= 1 |fibonacci_#t~ret0|) (<= fibonacci_~n |fibonacci_#in~n|)) (< 9 |fibonacci_#in~n|)) (or (<= |fibonacci_#t~ret0| 5) (< 6 |fibonacci_#in~n|)) (or (< 8 |fibonacci_#in~n|) (<= |fibonacci_#t~ret0| 13)) (or (<= |fibonacci_#t~ret0| 1) (< 4 |fibonacci_#in~n|) (and (<= 4 fibonacci_~n) (<= |fibonacci_#t~ret0| 2))) (or (<= |fibonacci_#t~ret0| 3) (< 5 |fibonacci_#in~n|)) (< 1 |fibonacci_#in~n|) (or (<= |fibonacci_#t~ret0| 8) (< 7 |fibonacci_#in~n|))) [2018-11-10 10:06:17,113 INFO L425 ceAbstractionStarter]: For program point L20-7(line 20) no Hoare annotation was computed. [2018-11-10 10:06:17,113 INFO L425 ceAbstractionStarter]: For program point L20-8(line 20) no Hoare annotation was computed. [2018-11-10 10:06:17,113 INFO L425 ceAbstractionStarter]: For program point L20-9(line 20) no Hoare annotation was computed. [2018-11-10 10:06:17,113 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-10 10:06:17,113 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-10 10:06:17,113 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-10 10:06:17,113 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-10 10:06:17,113 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-10 10:06:17,113 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-10 10:06:17,113 INFO L425 ceAbstractionStarter]: For program point L31(line 31) no Hoare annotation was computed. [2018-11-10 10:06:17,113 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 25 33) the Hoare annotation is: true [2018-11-10 10:06:17,113 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 25 33) no Hoare annotation was computed. [2018-11-10 10:06:17,113 INFO L425 ceAbstractionStarter]: For program point L28(lines 28 32) no Hoare annotation was computed. [2018-11-10 10:06:17,113 INFO L421 ceAbstractionStarter]: At program point L27(line 27) the Hoare annotation is: (and (<= 9 main_~x~0) (<= main_~x~0 9)) [2018-11-10 10:06:17,114 INFO L425 ceAbstractionStarter]: For program point L27-1(line 27) no Hoare annotation was computed. [2018-11-10 10:06:17,114 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 25 33) no Hoare annotation was computed. [2018-11-10 10:06:17,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 10:06:17 BoogieIcfgContainer [2018-11-10 10:06:17,116 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 10:06:17,116 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 10:06:17,116 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 10:06:17,116 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 10:06:17,117 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 10:06:05" (3/4) ... [2018-11-10 10:06:17,120 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-10 10:06:17,126 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure fibonacci [2018-11-10 10:06:17,126 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-10 10:06:17,126 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-10 10:06:17,129 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-10 10:06:17,129 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-10 10:06:17,130 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-10 10:06:17,161 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_37a6f07a-f520-4caf-b6a6-7f1bcaec51e6/bin-2019/uautomizer/witness.graphml [2018-11-10 10:06:17,161 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 10:06:17,162 INFO L168 Benchmark]: Toolchain (without parser) took 11721.54 ms. Allocated memory was 1.0 GB in the beginning and 1.7 GB in the end (delta: 703.1 MB). Free memory was 953.8 MB in the beginning and 1.3 GB in the end (delta: -360.4 MB). Peak memory consumption was 342.6 MB. Max. memory is 11.5 GB. [2018-11-10 10:06:17,162 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 10:06:17,163 INFO L168 Benchmark]: CACSL2BoogieTranslator took 159.11 ms. Allocated memory is still 1.0 GB. Free memory was 953.8 MB in the beginning and 943.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-10 10:06:17,163 INFO L168 Benchmark]: Boogie Preprocessor took 15.32 ms. Allocated memory is still 1.0 GB. Free memory is still 943.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 10:06:17,163 INFO L168 Benchmark]: RCFGBuilder took 179.06 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.1 MB). Free memory was 943.0 MB in the beginning and 1.1 GB in the end (delta: -196.9 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. [2018-11-10 10:06:17,163 INFO L168 Benchmark]: TraceAbstraction took 11319.87 ms. Allocated memory was 1.2 GB in the beginning and 1.7 GB in the end (delta: 550.0 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -174.3 MB). Peak memory consumption was 375.7 MB. Max. memory is 11.5 GB. [2018-11-10 10:06:17,164 INFO L168 Benchmark]: Witness Printer took 45.04 ms. Allocated memory is still 1.7 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 24 B). Peak memory consumption was 24 B. Max. memory is 11.5 GB. [2018-11-10 10:06:17,165 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 159.11 ms. Allocated memory is still 1.0 GB. Free memory was 953.8 MB in the beginning and 943.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.32 ms. Allocated memory is still 1.0 GB. Free memory is still 943.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 179.06 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.1 MB). Free memory was 943.0 MB in the beginning and 1.1 GB in the end (delta: -196.9 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 11319.87 ms. Allocated memory was 1.2 GB in the beginning and 1.7 GB in the end (delta: 550.0 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -174.3 MB). Peak memory consumption was 375.7 MB. Max. memory is 11.5 GB. * Witness Printer took 45.04 ms. Allocated memory is still 1.7 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 24 B). Peak memory consumption was 24 B. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 6 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 34 locations, 6 error locations. SAFE Result, 11.2s OverallTime, 19 OverallIterations, 109 TraceHistogramMax, 3.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.9s HoareAnnotationTime, HoareTripleCheckerStatistics: 509 SDtfs, 2231 SDslu, 2714 SDs, 0 SdLazy, 3916 SolverSat, 923 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4187 GetRequests, 3778 SyntacticMatches, 2 SemanticMatches, 407 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3115 ImplicationChecksByTransitivity, 3.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=159occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 19 MinimizatonAttempts, 94 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 284 PreInvPairs, 436 NumberOfFragments, 99 HoareAnnotationTreeSize, 284 FomulaSimplifications, 3684 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 2601 FormulaSimplificationTreeSizeReductionInter, 0.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 3.8s InterpolantComputationTime, 6960 NumberOfCodeBlocks, 6863 NumberOfCodeBlocksAsserted, 206 NumberOfCheckSat, 6927 ConstructedInterpolants, 0 QuantifiedInterpolants, 9705869 SizeOfPredicates, 44 NumberOfNonLiveVariables, 6129 ConjunctsInSsa, 624 ConjunctsInUnsatCore, 33 InterpolantComputations, 5 PerfectInterpolantSequences, 112685/138865 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...