{- |

Module : ./GUI/GtkDisprove.hs

Description : Gtk Module to enable disproving Theorems

Copyright : (c) Simon Ulbricht, Uni Bremen 2010

License : GPLv2 or higher, see LICENSE.txt

Maintainer : tekknix@informatik.uni-bremen.de

Stability : provisional

Portability : portable

This module provides a disproving module that checks consistency of inverted

theorems.

-}

module GUI.GtkDisprove (disproveAtNode) where

import Graphics.UI.Gtk

import Graphics.UI.Gtk.Glade

import GUI.GtkUtils

import qualified GUI.Glade.NodeChecker as ConsistencyChecker

import GUI.GraphTypes

import GUI.GraphLogic hiding (openProofStatus)

import GUI.GtkConsistencyChecker

import Proofs.ConsistencyCheck

import Interfaces.GenericATPState (guiDefaultTimeLimit)

import Interfaces.DataTypes

import Interfaces.Utils (updateNodeProof)

import Logic.Logic

import Logic.Prover

import Static.DevGraph

import Static.GTheory

import Static.ComputeTheory

import qualified Common.OrderedMap as OMap

import Common.AS_Annotation

import Common.LibName (LibName)

import Common.Result

import Common.ExtSign

import Control.Concurrent (forkIO, killThread)

import Control.Concurrent.MVar

import Control.Monad (unless)

import Data.Graph.Inductive.Graph (LNode)

import Data.IORef

import qualified Data.Map as Map

import Data.List

import Data.Maybe

{- | this method holds the functionality to convert the nodes goals to the

FNode datatype from GUI.GtkConsistencyChecker. The goals are being negated

by negate_th and this theory is stored in FNodes DGNodeLab local and global

theory. -}

showDisproveGUI :: GInfo -> LibEnv -> DGraph -> LNode DGNodeLab -> IO ()

showDisproveGUI gi le dg (i, lbl) = case globalTheory lbl of

Nothing -> error "GtkDisprove.showDisproveGUI(no global theory found)"

Just gt@(G_theory _ _ _ _ sens _) -> let

fg g th = let

l = lbl { dgn_theory = th }

l' = l { globalTheory = computeLabelTheory le dg (i, l) }

no_cs = ConsistencyStatus CSUnchecked ""

stat = case OMap.lookup g sens of

Nothing -> no_cs

Just tm -> case thmStatus tm of

[] -> no_cs

ts -> basicProofToConStatus $ maximum $ map snd ts

in FNode { name = g, node = (i, l'), sublogic = sublogicOfTh th,

cStatus = stat }

fgoals = foldr (\ (g, _) t -> case negate_th gt g of

Nothing -> t

Just nt -> fg g nt : t) []

$ getThGoals gt

in if null fgoals

then

errorDialogExt "Error (disprove)" "found no goals suitable for disprove function"

else do

wait <- newEmptyMVar

showDisproveWindow wait (libName gi) le dg gt fgoals

res <- takeMVar wait

runDisproveAtNode gi (i, lbl) res

{- | negates a single sentence within a G_theory and returns a theory

containing all axioms in addition to the one negated sentence. -}

negate_th :: G_theory -> String -> Maybe G_theory

negate_th g_th goal = case g_th of

G_theory lid1 syn (ExtSign sign symb) i1 sens _ ->

case OMap.lookup goal sens of

Nothing -> Nothing

Just sen ->

case negation lid1 $ sentence sen of

Nothing -> Nothing

Just sen' -> let

negSen = sen { sentence = sen', isAxiom = True }

sens' = OMap.insert goal negSen $ OMap.filter isAxiom sens

in Just $ G_theory lid1 syn (ExtSign sign symb) i1 sens' startThId

{- | this function is being called from outside and manages the locking-

mechanism of the node being called upon. -}

disproveAtNode :: GInfo -> Int -> DGraph -> IO ()

disproveAtNode gInfo descr dgraph = do

lockedEnv <- ensureLockAtNode gInfo descr dgraph

case lockedEnv of

Nothing -> return ()

Just (dg, lbl, le) -> do

acquired <- tryLockLocal lbl

if acquired then do

showDisproveGUI gInfo le dg (descr, lbl)

unlockLocal lbl

else errorDialogExt "Error" "Proof or disproof window already open"

{- | after results have been collected, this function is called to store

the results for this node within the dgraphs history. -}

runDisproveAtNode :: GInfo -> LNode DGNodeLab -> Result G_theory -> IO ()

runDisproveAtNode gInfo (v, dgnode) (Result ds mres) = case mres of

Just rTh ->

let oldTh = dgn_theory dgnode in

unless (rTh == oldTh) $ do

showDiagMessAux 2 ds

lockGlobal gInfo

let ln = libName gInfo

iSt = intState gInfo

ost <- readIORef iSt

let (ost', hist) = updateNodeProof ln ost (v, dgnode) rTh

case i_state ost' of

Nothing -> return ()

Just _ -> do

writeIORef iSt ost'

runAndLock gInfo $ updateGraph gInfo hist

unlockGlobal gInfo

_ -> return ()

{- | Displays a GUI to set TimeoutLimit and select the ConsistencyChecker

and holds the functionality to call the ConsistencyChecker for the

(previously negated) selected Theorems. -}

showDisproveWindow :: MVar (Result G_theory) -> LibName -> LibEnv

-> DGraph -> G_theory -> [FNode] -> IO ()

showDisproveWindow res ln le dg g_th fgoals = postGUIAsync $ do

xml <- getGladeXML ConsistencyChecker.get

-- get objects

window <- xmlGetWidget xml castToWindow "NodeChecker"

btnClose <- xmlGetWidget xml castToButton "btnClose"

btnResults <- xmlGetWidget xml castToButton "btnResults"

-- get goals view and buttons

trvGoals <- xmlGetWidget xml castToTreeView "trvNodes"

btnNodesAll <- xmlGetWidget xml castToButton "btnNodesAll"

btnNodesNone <- xmlGetWidget xml castToButton "btnNodesNone"

btnNodesInvert <- xmlGetWidget xml castToButton "btnNodesInvert"

btnNodesUnchecked <- xmlGetWidget xml castToButton "btnNodesUnchecked"

btnNodesTimeout <- xmlGetWidget xml castToButton "btnNodesTimeout"

cbInclThms <- xmlGetWidget xml castToCheckButton "cbInclThms"

-- get checker view and buttons

cbComorphism <- xmlGetWidget xml castToComboBox "cbComorphism"

lblSublogic <- xmlGetWidget xml castToLabel "lblSublogic"

sbTimeout <- xmlGetWidget xml castToSpinButton "sbTimeout"

btnCheck <- xmlGetWidget xml castToButton "btnCheck"

btnStop <- xmlGetWidget xml castToButton "btnStop"

trvFinder <- xmlGetWidget xml castToTreeView "trvFinder"

toolLabel <- xmlGetWidget xml castToLabel "label1"

labelSetLabel toolLabel "Pick disprover"

windowSetTitle window "Disprove"

spinButtonSetValue sbTimeout $ fromIntegral guiDefaultTimeLimit

let widgets = [ toWidget sbTimeout

, toWidget cbComorphism

, toWidget lblSublogic ]

checkWidgets = widgets ++ [ toWidget btnClose

, toWidget btnNodesAll

, toWidget btnNodesNone

, toWidget btnNodesInvert

, toWidget btnNodesUnchecked

, toWidget btnNodesTimeout

, toWidget btnResults ]

switch b = do

widgetSetSensitive btnStop $ not b

widgetSetSensitive btnCheck b

widgetSetSensitive btnStop False

widgetSetSensitive btnCheck False

threadId <- newEmptyMVar

wait <- newEmptyMVar

mView <- newEmptyMVar

-- setup data

listGoals <- setListData trvGoals show $ sort fgoals

listFinder <- setListData trvFinder fName []

-- setup comorphism combobox

comboBoxSetModelText cbComorphism

shC <- after cbComorphism changed

$ setSelectedComorphism trvFinder listFinder cbComorphism

-- setup view selection actions

let update = do

mf <- getSelectedSingle trvFinder listFinder

updateComorphism trvFinder listFinder cbComorphism shC

widgetSetSensitive btnCheck $ isJust mf

setListSelectorSingle trvFinder update

let upd = updateNodes trvGoals listGoals

(\ b s -> do

labelSetLabel lblSublogic $ show s

updateFinder trvFinder listFinder b s)

(do

labelSetLabel lblSublogic "No sublogic"

listStoreClear listFinder

activate widgets False

widgetSetSensitive btnCheck False)

(activate widgets True >> widgetSetSensitive btnCheck True)

shN <- setListSelectorMultiple trvGoals btnNodesAll btnNodesNone

btnNodesInvert upd

-- bindings

let selectWithAux f u = do

signalBlock shN

sel <- treeViewGetSelection trvGoals

treeSelectionSelectAll sel

rs <- treeSelectionGetSelectedRows sel

mapM_ ( \ ~p@(row : []) -> do

fn <- listStoreGetValue listGoals row

(if f fn then treeSelectionSelectPath else treeSelectionUnselectPath)

sel p) rs

signalUnblock shN

u

selectWith f = selectWithAux $ f . cStatus

onClicked btnNodesUnchecked

$ selectWith (== ConsistencyStatus CSUnchecked "") upd

onClicked btnNodesTimeout $ selectWith (== ConsistencyStatus CSTimeout "") upd

onClicked btnResults $ showModelView mView "Models" listGoals []

onClicked btnClose $ widgetDestroy window

onClicked btnStop $ takeMVar threadId >>= killThread >>= putMVar wait

onClicked btnCheck $ do

activate checkWidgets False

timeout <- spinButtonGetValueAsInt sbTimeout

inclThms <- toggleButtonGetActive cbInclThms

(updat, pexit) <- progressBar "Checking consistency" "please wait..."

goals' <- getSelectedMultiple trvGoals listGoals

mf <- getSelectedSingle trvFinder listFinder

f <- case mf of

Nothing -> error "Disprove: internal error"

Just (_, f) -> return f

switch False

tid <- forkIO $ do

{- call the check function from GUI.GtkConsistencyChecker.

first argument means disprove-mode and leads the ConsistencyChecker

to mark consistent sentences as disproved (since consistent with

negated sentence) -}

check True inclThms ln le dg f timeout listGoals updat goals'

putMVar wait ()

putMVar threadId tid

forkIO_ $ do

takeMVar wait

postGUIAsync $ do

switch True

tryTakeMVar threadId

showModelView mView "Results of disproving" listGoals []

signalBlock shN

sortNodes trvGoals listGoals

signalUnblock shN

upd

activate checkWidgets True

pexit

{- after window closes a new G_theory is created containing the results.

only successful disprove attempts are returned; for each one, a new

BasicProof is created and set to disproved. -}

onDestroy window $ do

fnodes' <- listStoreToList listGoals

maybe_F <- getSelectedSingle trvFinder listFinder

case maybe_F of

Just (_, f) -> case g_th of

G_theory lid syn sig i1 sens _ -> let

sens' = foldr (\ fg t -> if (sType . cStatus) fg == CSInconsistent

then let

n' = name fg

es = Map.findWithDefault (error

"GtkDisprove.showDisproveWindow") n' t

s = OMap.ele es

ps = openProofStatus n' (fName f) (empty_proof_tree lid)

bp = BasicProof lid ps { goalStatus = Disproved }

c = comorphism f !! selected f

s' = s { senAttr = ThmStatus $ (c, bp) : thmStatus s } in

Map.insert n' es { OMap.ele = s' } t

else t ) sens fnodes'

in putMVar res $ return (G_theory lid syn sig i1 sens' startThId)

_ -> putMVar res $ return g_th

selectWith (== ConsistencyStatus CSUnchecked "") upd

widgetShow window