----------------------------------------------------------------------------- -- | -- Module : Data.SBV.Control.Query -- Author : Levent Erkok -- License : BSD3 -- Maintainer: erkokl@gmail.com -- Stability : experimental -- -- Querying a solver interactively. ----------------------------------------------------------------------------- {-# LANGUAGE LambdaCase #-} {-# LANGUAGE NamedFieldPuns #-} {-# LANGUAGE Rank2Types #-} {-# LANGUAGE ScopedTypeVariables #-} {-# LANGUAGE TupleSections #-} {-# OPTIONS_GHC -fno-warn-orphans #-} module Data.SBV.Control.Query ( send, ask, retrieveResponse , CheckSatResult(..), checkSat, checkSatUsing, checkSatAssuming, checkSatAssumingWithUnsatisfiableSet , getUnsatCore, getProof, getInterpolant, getAssignment, getOption, freshVar, freshVar_, freshArray, freshArray_, push, pop, getAssertionStackDepth , inNewAssertionStack, echo, caseSplit, resetAssertions, exit, getAssertions, getValue, getUninterpretedValue, getModel, getSMTResult , getLexicographicOptResults, getIndependentOptResults, getParetoOptResults, getAllSatResult, getUnknownReason, getObservables, ensureSat , SMTOption(..), SMTInfoFlag(..), SMTErrorBehavior(..), SMTReasonUnknown(..), SMTInfoResponse(..), getInfo , Logic(..), Assignment(..) , ignoreExitCode, timeout , (|->) , mkSMTResult , io ) where import Control.Monad (unless, when, zipWithM) import Control.Monad.IO.Class (MonadIO) import Data.IORef (readIORef) import qualified Data.Map.Strict as M import qualified Data.IntMap.Strict as IM import Data.Char (toLower) import Data.List (unzip3, intercalate, nubBy, sortBy, sortOn) import Data.Maybe (listToMaybe, catMaybes) import Data.Function (on) import Data.SBV.Core.Data import Data.SBV.Core.Symbolic (MonadQuery(..), QueryState(..), SMTModel(..), SMTResult(..), State(..), incrementInternalCounter) import Data.SBV.Utils.SExpr import Data.SBV.Control.Types import Data.SBV.Control.Utils -- | An Assignment of a model binding data Assignment = Assign SVal CV -- Remove one pair of surrounding 'c's, if present noSurrounding :: Char -> String -> String noSurrounding c (c':cs@(_:_)) | c == c' && c == last cs = init cs noSurrounding _ s = s -- Remove a pair of surrounding quotes unQuote :: String -> String unQuote = noSurrounding '"' -- Remove a pair of surrounding bars unBar :: String -> String unBar = noSurrounding '|' -- Is this a string? If so, return it, otherwise fail in the Maybe monad. fromECon :: SExpr -> Maybe String fromECon (ECon s) = Just s fromECon _ = Nothing -- Collect strings appearing, used in 'getOption' only stringsOf :: SExpr -> [String] stringsOf (ECon s) = [s] stringsOf (ENum (i, _)) = [show i] stringsOf (EReal r) = [show r] stringsOf (EFloat f) = [show f] stringsOf (EDouble d) = [show d] stringsOf (EApp ss) = concatMap stringsOf ss -- Sort of a light-hearted show for SExprs, for better consumption at the user level. serialize :: Bool -> SExpr -> String serialize removeQuotes = go where go (ECon s) = if removeQuotes then unQuote s else s go (ENum (i, _)) = shNN i go (EReal r) = shNN r go (EFloat f) = shNN f go (EDouble d) = shNN d go (EApp [x]) = go x go (EApp ss) = "(" ++ unwords (map go ss) ++ ")" -- be careful with negative number printing in SMT-Lib.. shNN :: (Show a, Num a, Ord a) => a -> String shNN i | i < 0 = "(- " ++ show (-i) ++ ")" | True = show i -- | Generalization of 'Data.SBV.Control.getInfo' getInfo :: (MonadIO m, MonadQuery m) => SMTInfoFlag -> m SMTInfoResponse getInfo flag = do let cmd = "(get-info " ++ show flag ++ ")" bad = unexpected "getInfo" cmd "a valid get-info response" Nothing isAllStatistics AllStatistics = True isAllStatistics _ = False isAllStat = isAllStatistics flag grabAllStat k v = (render k, render v) -- we're trying to do our best to get key-value pairs here, but this -- is necessarily a half-hearted attempt. grabAllStats (EApp xs) = walk xs where walk [] = [] walk [t] = [grabAllStat t (ECon "")] walk (t : v : rest) = grabAllStat t v : walk rest grabAllStats o = [grabAllStat o (ECon "")] r <- ask cmd parse r bad $ \pe -> if isAllStat then return $ Resp_AllStatistics $ grabAllStats pe else case pe of ECon "unsupported" -> return Resp_Unsupported EApp [ECon ":assertion-stack-levels", ENum (i, _)] -> return $ Resp_AssertionStackLevels i EApp (ECon ":authors" : ns) -> return $ Resp_Authors (map render ns) EApp [ECon ":error-behavior", ECon "immediate-exit"] -> return $ Resp_Error ErrorImmediateExit EApp [ECon ":error-behavior", ECon "continued-execution"] -> return $ Resp_Error ErrorContinuedExecution EApp (ECon ":name" : o) -> return $ Resp_Name (render (EApp o)) EApp (ECon ":reason-unknown" : o) -> return $ Resp_ReasonUnknown (unk o) EApp (ECon ":version" : o) -> return $ Resp_Version (render (EApp o)) EApp (ECon s : o) -> return $ Resp_InfoKeyword s (map render o) _ -> bad r Nothing where render = serialize True unk [ECon s] | Just d <- getUR s = d unk o = UnknownOther (render (EApp o)) getUR s = map toLower (unQuote s) `lookup` [(map toLower k, d) | (k, d) <- unknownReasons] -- As specified in Section 4.1 of the SMTLib document. Note that we're adding the -- extra timeout as it is useful in this context. unknownReasons = [ ("memout", UnknownMemOut) , ("incomplete", UnknownIncomplete) , ("timeout", UnknownTimeOut) ] -- | Generalization of 'Data.SBV.Control.getInfo' getOption :: (MonadIO m, MonadQuery m) => (a -> SMTOption) -> m (Maybe SMTOption) getOption f = case f undefined of DiagnosticOutputChannel{} -> askFor "DiagnosticOutputChannel" ":diagnostic-output-channel" $ string DiagnosticOutputChannel ProduceAssertions{} -> askFor "ProduceAssertions" ":produce-assertions" $ bool ProduceAssertions ProduceAssignments{} -> askFor "ProduceAssignments" ":produce-assignments" $ bool ProduceAssignments ProduceProofs{} -> askFor "ProduceProofs" ":produce-proofs" $ bool ProduceProofs ProduceInterpolants{} -> askFor "ProduceInterpolants" ":produce-interpolants" $ bool ProduceInterpolants ProduceUnsatAssumptions{} -> askFor "ProduceUnsatAssumptions" ":produce-unsat-assumptions" $ bool ProduceUnsatAssumptions ProduceUnsatCores{} -> askFor "ProduceUnsatCores" ":produce-unsat-cores" $ bool ProduceUnsatCores RandomSeed{} -> askFor "RandomSeed" ":random-seed" $ integer RandomSeed ReproducibleResourceLimit{} -> askFor "ReproducibleResourceLimit" ":reproducible-resource-limit" $ integer ReproducibleResourceLimit SMTVerbosity{} -> askFor "SMTVerbosity" ":verbosity" $ integer SMTVerbosity OptionKeyword nm _ -> askFor ("OptionKeyword" ++ nm) nm $ stringList (OptionKeyword nm) SetLogic{} -> error "Data.SBV.Query: SMTLib does not allow querying value of the logic!" -- Not to be confused by getInfo, which is totally irrelevant! SetInfo{} -> error "Data.SBV.Query: SMTLib does not allow querying value of meta-info!" where askFor sbvName smtLibName continue = do let cmd = "(get-option " ++ smtLibName ++ ")" bad = unexpected ("getOption " ++ sbvName) cmd "a valid option value" Nothing r <- ask cmd parse r bad $ \case ECon "unsupported" -> return Nothing e -> continue e (bad r) string c (ECon s) _ = return $ Just $ c s string _ e k = k $ Just ["Expected string, but got: " ++ show (serialize False e)] bool c (ENum (0, _)) _ = return $ Just $ c False bool c (ENum (1, _)) _ = return $ Just $ c True bool _ e k = k $ Just ["Expected boolean, but got: " ++ show (serialize False e)] integer c (ENum (i, _)) _ = return $ Just $ c i integer _ e k = k $ Just ["Expected integer, but got: " ++ show (serialize False e)] -- free format, really stringList c e _ = return $ Just $ c $ stringsOf e -- | Generalization of 'Data.SBV.Control.getUnknownReason' getUnknownReason :: (MonadIO m, MonadQuery m) => m SMTReasonUnknown getUnknownReason = do ru <- getInfo ReasonUnknown case ru of Resp_Unsupported -> return $ UnknownOther "Solver responded: Unsupported." Resp_ReasonUnknown r -> return r -- Shouldn't happen, but just in case: _ -> error $ "Unexpected reason value received: " ++ show ru -- | Generalization of 'Data.SBV.Control.ensureSat' ensureSat :: (MonadIO m, MonadQuery m) => m () ensureSat = do cfg <- getConfig cs <- checkSatUsing $ satCmd cfg case cs of Sat -> return () Unk -> do s <- getUnknownReason error $ unlines [ "" , "*** Data.SBV.ensureSat: Solver reported Unknown!" , "*** Reason: " ++ show s ] Unsat -> error "Data.SBV.ensureSat: Solver reported Unsat!" -- | Generalization of 'Data.SBV.Control.getSMTResult' getSMTResult :: (MonadIO m, MonadQuery m) => m SMTResult getSMTResult = do cfg <- getConfig cs <- checkSat case cs of Unsat -> Unsatisfiable cfg <$> getUnsatCoreIfRequested Sat -> Satisfiable cfg <$> getModel Unk -> Unknown cfg <$> getUnknownReason -- | Classify a model based on whether it has unbound objectives or not. classifyModel :: SMTConfig -> SMTModel -> SMTResult classifyModel cfg m = case filter (not . isRegularCV . snd) (modelObjectives m) of [] -> Satisfiable cfg m _ -> SatExtField cfg m -- | Generalization of 'Data.SBV.Control.getLexicographicOptResults' getLexicographicOptResults :: (MonadIO m, MonadQuery m) => m SMTResult getLexicographicOptResults = do cfg <- getConfig cs <- checkSat case cs of Unsat -> Unsatisfiable cfg <$> getUnsatCoreIfRequested Sat -> classifyModel cfg <$> getModelWithObjectives Unk -> Unknown cfg <$> getUnknownReason where getModelWithObjectives = do objectiveValues <- getObjectiveValues m <- getModel return m {modelObjectives = objectiveValues} -- | Generalization of 'Data.SBV.Control.getIndependentOptResults' getIndependentOptResults :: forall m. (MonadIO m, MonadQuery m) => [String] -> m [(String, SMTResult)] getIndependentOptResults objNames = do cfg <- getConfig cs <- checkSat case cs of Unsat -> getUnsatCoreIfRequested >>= \mbUC -> return [(nm, Unsatisfiable cfg mbUC) | nm <- objNames] Sat -> continue (classifyModel cfg) Unk -> do ur <- Unknown cfg <$> getUnknownReason return [(nm, ur) | nm <- objNames] where continue classify = do objectiveValues <- getObjectiveValues nms <- zipWithM getIndependentResult [0..] objNames return [(n, classify (m {modelObjectives = objectiveValues})) | (n, m) <- nms] getIndependentResult :: Int -> String -> m (String, SMTModel) getIndependentResult i s = do m <- getModelAtIndex (Just i) return (s, m) -- | Generalization of 'Data.SBV.Control.getParetoOptResults' getParetoOptResults :: (MonadIO m, MonadQuery m) => Maybe Int -> m (Bool, [SMTResult]) getParetoOptResults (Just i) | i <= 0 = return (True, []) getParetoOptResults mbN = do cfg <- getConfig cs <- checkSat case cs of Unsat -> return (False, []) Sat -> continue (classifyModel cfg) Unk -> do ur <- getUnknownReason return (False, [ProofError cfg [show ur]]) where continue classify = do m <- getModel (limReached, fronts) <- getParetoFronts (subtract 1 <$> mbN) [m] return (limReached, reverse (map classify fronts)) getParetoFronts :: (MonadIO m, MonadQuery m) => Maybe Int -> [SMTModel] -> m (Bool, [SMTModel]) getParetoFronts (Just i) sofar | i <= 0 = return (True, sofar) getParetoFronts mbi sofar = do cs <- checkSat let more = getModel >>= \m -> getParetoFronts (subtract 1 <$> mbi) (m : sofar) case cs of Unsat -> return (False, sofar) Sat -> more Unk -> more -- | Generalization of 'Data.SBV.Control.getModel' getModel :: (MonadIO m, MonadQuery m) => m SMTModel getModel = getModelAtIndex Nothing -- | Get a model stored at an index. This is likely very Z3 specific! getModelAtIndex :: (MonadIO m, MonadQuery m) => Maybe Int -> m SMTModel getModelAtIndex mbi = do State{runMode} <- queryState cfg <- getConfig inps <- getQuantifiedInputs obsvs <- getObservables rm <- io $ readIORef runMode assocs <- case rm of m@CodeGen -> error $ "SBV.getModel: Model is not available in mode: " ++ show m m@Concrete -> error $ "SBV.getModel: Model is not available in mode: " ++ show m SMTMode _ isSAT _ -> -- for "sat", display the prefix existentials. for "proof", display the prefix universals let allModelInputs = if isSAT then takeWhile ((/= ALL) . fst) inps else takeWhile ((== ALL) . fst) inps -- are we inside a quantifier insideQuantifier = length allModelInputs < length inps -- observables are only meaningful if we're not in a quantified context prefixObservables | insideQuantifier = [] | True = obsvs sortByNodeId :: [(NamedSymVar, a)] -> [a] sortByNodeId = map snd . sortBy (compare `on` (\((SV _ nid, _), _) -> nid)) grab (sv, nm) = ((sv, nm),) <$> getValueCV mbi sv in do inputAssocs <- mapM (grab . snd) allModelInputs return $ sortOn fst prefixObservables ++ sortByNodeId [(sv, (nm, val)) | (sv@(_, nm), val) <- inputAssocs, not (isNonModelVar cfg nm)] return SMTModel { modelObjectives = [] , modelAssocs = assocs } -- | Just after a check-sat is issued, collect objective values. Used -- internally only, not exposed to the user. getObjectiveValues :: forall m. (MonadIO m, MonadQuery m) => m [(String, GeneralizedCV)] getObjectiveValues = do let cmd = "(get-objectives)" bad = unexpected "getObjectiveValues" cmd "a list of objective values" Nothing r <- ask cmd inputs <- map snd <$> getQuantifiedInputs parse r bad $ \case EApp (ECon "objectives" : es) -> catMaybes <$> mapM (getObjValue (bad r) inputs) es _ -> bad r Nothing where -- | Parse an objective value out. getObjValue :: (forall a. Maybe [String] -> m a) -> [NamedSymVar] -> SExpr -> m (Maybe (String, GeneralizedCV)) getObjValue bailOut inputs expr = case expr of EApp [_] -> return Nothing -- Happens when a soft-assertion has no associated group. EApp [ECon nm, v] -> locate nm v Nothing -- Regular case EApp [EApp [ECon "bvadd", ECon nm, ENum (a, _)], v] -> locate nm v (Just a) -- Happens when we "adjust" a signed-bounded objective _ -> dontUnderstand (show expr) where locate nm v mbAdjust = case listToMaybe [p | p@(sv, _) <- inputs, show sv == nm] of Nothing -> return Nothing -- Happens when the soft assertion has a group-id that's not one of the input names Just (sv, actualName) -> grab sv v >>= \val -> return $ Just (actualName, signAdjust mbAdjust val) dontUnderstand s = bailOut $ Just [ "Unable to understand solver output." , "While trying to process: " ++ s ] signAdjust :: Maybe Integer -> GeneralizedCV -> GeneralizedCV signAdjust Nothing v = v signAdjust (Just adj) e = goG e where goG :: GeneralizedCV -> GeneralizedCV goG (ExtendedCV ecv) = ExtendedCV $ goE ecv goG (RegularCV cv) = RegularCV $ go cv goE :: ExtCV -> ExtCV goE (Infinite k) = Infinite k goE (Epsilon k) = Epsilon k goE (Interval lo hi) = Interval (goE lo) (goE hi) goE (BoundedCV cv) = BoundedCV (go cv) goE (AddExtCV a b) = AddExtCV (goE a) (goE b) goE (MulExtCV a b) = MulExtCV (goE a) (goE b) go :: CV -> CV go cv = case (kindOf cv, cvVal cv) of (k@(KBounded True _), CInteger v) -> normCV $ CV k (CInteger (v - adj)) _ -> error $ "SBV.getObjValue: Unexpected cv received! " ++ show cv grab :: SV -> SExpr -> m GeneralizedCV grab s topExpr | Just v <- recoverKindedValue k topExpr = return $ RegularCV v | True = ExtendedCV <$> cvt (simplify topExpr) where k = kindOf s -- Convert to an extended expression. Hopefully complete! cvt :: SExpr -> m ExtCV cvt (ECon "oo") = return $ Infinite k cvt (ECon "epsilon") = return $ Epsilon k cvt (EApp [ECon "interval", x, y]) = Interval <$> cvt x <*> cvt y cvt (ENum (i, _)) = return $ BoundedCV $ mkConstCV k i cvt (EReal r) = return $ BoundedCV $ CV k $ CAlgReal r cvt (EFloat f) = return $ BoundedCV $ CV k $ CFloat f cvt (EDouble d) = return $ BoundedCV $ CV k $ CDouble d cvt (EApp [ECon "+", x, y]) = AddExtCV <$> cvt x <*> cvt y cvt (EApp [ECon "*", x, y]) = MulExtCV <$> cvt x <*> cvt y -- Nothing else should show up, hopefully! cvt e = dontUnderstand (show e) -- drop the pesky to_real's that Z3 produces.. Cool but useless. simplify :: SExpr -> SExpr simplify (EApp [ECon "to_real", n]) = n simplify (EApp xs) = EApp (map simplify xs) simplify e = e -- | Generalization of 'Data.SBV.Control.checkSatAssuming' checkSatAssuming :: (MonadIO m, MonadQuery m) => [SBool] -> m CheckSatResult checkSatAssuming sBools = fst <$> checkSatAssumingHelper False sBools -- | Generalization of 'Data.SBV.Control.checkSatAssumingWithUnsatisfiableSet' checkSatAssumingWithUnsatisfiableSet :: (MonadIO m, MonadQuery m) => [SBool] -> m (CheckSatResult, Maybe [SBool]) checkSatAssumingWithUnsatisfiableSet = checkSatAssumingHelper True -- | Helper for the two variants of checkSatAssuming we have. Internal only. checkSatAssumingHelper :: (MonadIO m, MonadQuery m) => Bool -> [SBool] -> m (CheckSatResult, Maybe [SBool]) checkSatAssumingHelper getAssumptions sBools = do -- sigh.. SMT-Lib requires the values to be literals only. So, create proxies. let mkAssumption st = do swsOriginal <- mapM (\sb -> do sv <- sbvToSV st sb return (sv, sb)) sBools -- drop duplicates and trues let swbs = [p | p@(sv, _) <- nubBy ((==) `on` fst) swsOriginal, sv /= trueSV] -- get a unique proxy name for each uniqueSWBs <- mapM (\(sv, sb) -> do unique <- incrementInternalCounter st return (sv, (unique, sb))) swbs let translate (sv, (unique, sb)) = (nm, decls, (proxy, sb)) where nm = show sv proxy = "__assumption_proxy_" ++ nm ++ "_" ++ show unique decls = [ "(declare-const " ++ proxy ++ " Bool)" , "(assert (= " ++ proxy ++ " " ++ nm ++ "))" ] return $ map translate uniqueSWBs assumptions <- inNewContext mkAssumption let (origNames, declss, proxyMap) = unzip3 assumptions let cmd = "(check-sat-assuming (" ++ unwords (map fst proxyMap) ++ "))" bad = unexpected "checkSatAssuming" cmd "one of sat/unsat/unknown" $ Just [ "Make sure you use:" , "" , " setOption $ ProduceUnsatAssumptions True" , "" , "to tell the solver to produce unsat assumptions." ] mapM_ (send True) $ concat declss r <- ask cmd let grabUnsat | getAssumptions = do as <- getUnsatAssumptions origNames proxyMap return (Unsat, Just as) | True = return (Unsat, Nothing) parse r bad $ \case ECon "sat" -> return (Sat, Nothing) ECon "unsat" -> grabUnsat ECon "unknown" -> return (Unk, Nothing) _ -> bad r Nothing -- | Generalization of 'Data.SBV.Control.getAssertionStackDepth' getAssertionStackDepth :: (MonadIO m, MonadQuery m) => m Int getAssertionStackDepth = queryAssertionStackDepth <$> getQueryState -- | Upon a pop, we need to restore all arrays and tables. See: http://github.com/LeventErkok/sbv/issues/374 restoreTablesAndArrays :: (MonadIO m, MonadQuery m) => m () restoreTablesAndArrays = do st <- queryState qs <- getQueryState case queryTblArrPreserveIndex qs of Nothing -> return () Just (tc, ac) -> do tCount <- M.size <$> (io . readIORef) (rtblMap st) aCount <- IM.size <$> (io . readIORef) (rArrayMap st) let tInits = [ "table" ++ show i ++ "_initializer" | i <- [tc .. tCount - 1]] aInits = [ "array_" ++ show i ++ "_initializer" | i <- [ac .. aCount - 1]] inits = tInits ++ aInits case inits of [] -> return () -- Nothing to do [x] -> send True $ "(assert " ++ x ++ ")" xs -> send True $ "(assert (and " ++ unwords xs ++ "))" -- | Upon a push, record the cut-off point for table and array restoration, if we haven't already recordTablesAndArrayCutOff :: (MonadIO m, MonadQuery m) => m () recordTablesAndArrayCutOff = do st <- queryState qs <- getQueryState case queryTblArrPreserveIndex qs of Just _ -> return () -- already recorded, nothing to do Nothing -> do tCount <- M.size <$> (io . readIORef) (rtblMap st) aCount <- IM.size <$> (io . readIORef) (rArrayMap st) modifyQueryState $ \s -> s {queryTblArrPreserveIndex = Just (tCount, aCount)} -- | Generalization of 'Data.SBV.Control.inNewAssertionStack' inNewAssertionStack :: (MonadIO m, MonadQuery m) => m a -> m a inNewAssertionStack q = do push 1 r <- q pop 1 return r -- | Generalization of 'Data.SBV.Control.push' push :: (MonadIO m, MonadQuery m) => Int -> m () push i | i <= 0 = error $ "Data.SBV: push requires a strictly positive level argument, received: " ++ show i | True = do depth <- getAssertionStackDepth send True $ "(push " ++ show i ++ ")" recordTablesAndArrayCutOff modifyQueryState $ \s -> s{queryAssertionStackDepth = depth + i} -- | Generalization of 'Data.SBV.Control.pop' pop :: (MonadIO m, MonadQuery m) => Int -> m () pop i | i <= 0 = error $ "Data.SBV: pop requires a strictly positive level argument, received: " ++ show i | True = do depth <- getAssertionStackDepth if i > depth then error $ "Data.SBV: Illegally trying to pop " ++ shl i ++ ", at current level: " ++ show depth else do QueryState{queryConfig} <- getQueryState if not (supportsGlobalDecls (capabilities (solver queryConfig))) then error $ unlines [ "" , "*** Data.SBV: Backend solver does not support global-declarations." , "*** Hence, calls to 'pop' are not supported." , "***" , "*** Request this as a feature for the underlying solver!" ] else do send True $ "(pop " ++ show i ++ ")" restoreTablesAndArrays modifyQueryState $ \s -> s{queryAssertionStackDepth = depth - i} where shl 1 = "one level" shl n = show n ++ " levels" -- | Generalization of 'Data.SBV.Control.caseSplit' caseSplit :: (MonadIO m, MonadQuery m) => Bool -> [(String, SBool)] -> m (Maybe (String, SMTResult)) caseSplit printCases cases = do cfg <- getConfig go cfg (cases ++ [("Coverage", sNot (sOr (map snd cases)))]) where msg = when printCases . io . putStrLn go _ [] = return Nothing go cfg ((n,c):ncs) = do let notify s = msg $ "Case " ++ n ++ ": " ++ s notify "Starting" r <- checkSatAssuming [c] case r of Unsat -> do notify "Unsatisfiable" go cfg ncs Sat -> do notify "Satisfiable" res <- Satisfiable cfg <$> getModel return $ Just (n, res) Unk -> do notify "Unknown" res <- Unknown cfg <$> getUnknownReason return $ Just (n, res) -- | Generalization of 'Data.SBV.Control.resetAssertions' resetAssertions :: (MonadIO m, MonadQuery m) => m () resetAssertions = do send True "(reset-assertions)" modifyQueryState $ \s -> s{queryAssertionStackDepth = 0} -- | Generalization of 'Data.SBV.Control.echo' echo :: (MonadIO m, MonadQuery m) => String -> m () echo s = do let cmd = "(echo \"" ++ concatMap sanitize s ++ "\")" -- we send the command, but otherwise ignore the response -- note that 'send True/False' would be incorrect here. 'send True' would -- require a success response. 'send False' would fail to consume the -- output. But 'ask' does the right thing! It gets "some" response, -- and forgets about it immediately. _ <- ask cmd return () where sanitize '"' = "\"\"" -- quotes need to be duplicated sanitize c = [c] -- | Generalization of 'Data.SBV.Control.exit' exit :: (MonadIO m, MonadQuery m) => m () exit = do send True "(exit)" modifyQueryState $ \s -> s{queryAssertionStackDepth = 0} -- | Generalization of 'Data.SBV.Control.getUnsatCore' getUnsatCore :: (MonadIO m, MonadQuery m) => m [String] getUnsatCore = do let cmd = "(get-unsat-core)" bad = unexpected "getUnsatCore" cmd "an unsat-core response" $ Just [ "Make sure you use:" , "" , " setOption $ ProduceUnsatCores True" , "" , "so the solver will be ready to compute unsat cores," , "and that there is a model by first issuing a 'checkSat' call." , "" , "If using z3, you might also optionally want to set:" , "" , " setOption $ OptionKeyword \":smt.core.minimize\" [\"true\"]" , "" , "to make sure the unsat core doesn't have irrelevant entries," , "though this might incur a performance penalty." ] r <- ask cmd parse r bad $ \case EApp es | Just xs <- mapM fromECon es -> return $ map unBar xs _ -> bad r Nothing -- | Retrieve the unsat core if it was asked for in the configuration getUnsatCoreIfRequested :: (MonadIO m, MonadQuery m) => m (Maybe [String]) getUnsatCoreIfRequested = do cfg <- getConfig if or [b | ProduceUnsatCores b <- solverSetOptions cfg] then Just <$> getUnsatCore else return Nothing -- | Generalization of 'Data.SBV.Control.getProof' getProof :: (MonadIO m, MonadQuery m) => m String getProof = do let cmd = "(get-proof)" bad = unexpected "getProof" cmd "a get-proof response" $ Just [ "Make sure you use:" , "" , " setOption $ ProduceProofs True" , "" , "to make sure the solver is ready for producing proofs," , "and that there is a proof by first issuing a 'checkSat' call." ] r <- ask cmd -- we only care about the fact that we can parse the output, so the -- result of parsing is ignored. parse r bad $ \_ -> return r -- | Generalization of 'Data.SBV.Control.getInterpolant' getInterpolant :: (MonadIO m, MonadQuery m) => [String] -> m String getInterpolant fs | null fs = error "SBV.getInterpolant requires at least one marked constraint, received none!" | True = do let bar s = '|' : s ++ "|" cmd = "(get-interpolant (" ++ unwords (map bar fs) ++ "))" bad = unexpected "getInterpolant" cmd "a get-interpolant response" $ Just [ "Make sure you use:" , "" , " setOption $ ProduceInterpolants True" , "" , "to make sure the solver is ready for producing interpolants," , "and that you have used the proper attributes using the" , "constrainWithAttribute function." ] r <- ask cmd parse r bad $ \e -> return $ serialize False e -- | Generalization of 'Data.SBV.Control.getAssertions' getAssertions :: (MonadIO m, MonadQuery m) => m [String] getAssertions = do let cmd = "(get-assertions)" bad = unexpected "getAssertions" cmd "a get-assertions response" $ Just [ "Make sure you use:" , "" , " setOption $ ProduceAssertions True" , "" , "to make sure the solver is ready for producing assertions." ] render = serialize False r <- ask cmd parse r bad $ \pe -> case pe of EApp xs -> return $ map render xs _ -> return [render pe] -- | Generalization of 'Data.SBV.Control.getAssignment' getAssignment :: (MonadIO m, MonadQuery m) => m [(String, Bool)] getAssignment = do let cmd = "(get-assignment)" bad = unexpected "getAssignment" cmd "a get-assignment response" $ Just [ "Make sure you use:" , "" , " setOption $ ProduceAssignments True" , "" , "to make sure the solver is ready for producing assignments," , "and that there is a model by first issuing a 'checkSat' call." ] -- we're expecting boolean assignment to labels, essentially grab (EApp [ECon s, ENum (0, _)]) = Just (unQuote s, False) grab (EApp [ECon s, ENum (1, _)]) = Just (unQuote s, True) grab _ = Nothing r <- ask cmd parse r bad $ \case EApp ps | Just vs <- mapM grab ps -> return vs _ -> bad r Nothing -- | Make an assignment. The type 'Assignment' is abstract, the result is typically passed -- to 'mkSMTResult': -- -- @ mkSMTResult [ a |-> 332 -- , b |-> 2.3 -- , c |-> True -- ] -- @ -- -- End users should use 'getModel' for automatically constructing models from the current solver state. -- However, an explicit 'Assignment' might be handy in complex scenarios where a model needs to be -- created manually. infix 1 |-> (|->) :: SymVal a => SBV a -> a -> Assignment SBV a |-> v = case literal v of SBV (SVal _ (Left cv)) -> Assign a cv r -> error $ "Data.SBV: Impossible happened in |->: Cannot construct a CV with literal: " ++ show r -- | Generalization of 'Data.SBV.Control.mkSMTResult' mkSMTResult :: (MonadIO m, MonadQuery m) => [Assignment] -> m SMTResult mkSMTResult asgns = do QueryState{queryConfig} <- getQueryState inps <- getQuantifiedInputs let grabValues st = do let extract (Assign s n) = sbvToSV st (SBV s) >>= \sv -> return (sv, n) modelAssignment <- mapM extract asgns -- sanity checks -- - All existentials should be given a value -- - No duplicates -- - No bindings to vars that are not inputs let userSS = map fst modelAssignment missing, extra, dup :: [String] missing = [n | (EX, (s, n)) <- inps, s `notElem` userSS] extra = [show s | s <- userSS, s `notElem` map (fst . snd) inps] dup = let walk [] = [] walk (n:ns) | n `elem` ns = show n : walk (filter (/= n) ns) | True = walk ns in walk userSS unless (null (missing ++ extra ++ dup)) $ do let misTag = "*** Missing inputs" dupTag = "*** Duplicate bindings" extTag = "*** Extra bindings" maxLen = maximum $ 0 : [length misTag | not (null missing)] ++ [length extTag | not (null extra)] ++ [length dupTag | not (null dup)] align s = s ++ replicate (maxLen - length s) ' ' ++ ": " error $ unlines $ ["" , "*** Data.SBV: Query model construction has a faulty assignment." , "***" ] ++ [ align misTag ++ intercalate ", " missing | not (null missing)] ++ [ align extTag ++ intercalate ", " extra | not (null extra) ] ++ [ align dupTag ++ intercalate ", " dup | not (null dup) ] ++ [ "***" , "*** Data.SBV: Check your query result construction!" ] let findName s = case [nm | (_, (i, nm)) <- inps, s == i] of [nm] -> nm [] -> error "*** Data.SBV: Impossible happened: Cannot find " ++ show s ++ " in the input list" nms -> error $ unlines [ "" , "*** Data.SBV: Impossible happened: Multiple matches for: " ++ show s , "*** Candidates: " ++ unwords nms ] return [(findName s, n) | (s, n) <- modelAssignment] assocs <- inNewContext grabValues let m = SMTModel { modelObjectives = [] , modelAssocs = assocs } return $ Satisfiable queryConfig m