{- |

Module : $Header$

Description : interface to the Isabelle theorem prover

Copyright : (c) University of Cambridge, Cambridge, England

adaption (c) Till Mossakowski, Uni Bremen 2002-2005

License : similar to LGPL, see HetCATS/LICENSE.txt or LIZENZ.txt

Maintainer : Christian.Maeder@dfki.de

Stability : provisional

Portability : portable

Interface for Isabelle theorem prover.

-}

{-

Interface between Isabelle and Hets:

Hets writes Isabelle .thy file and starts Isabelle

User extends .thy file with proofs

User finishes Isabelle

Hets reads in created *.deps files

-}

module Isabelle.IsaProve where

import Logic.Prover

import Isabelle.IsaSign

import Isabelle.IsaConsts

import Isabelle.IsaPrint

import Isabelle.IsaParse

import Isabelle.Translate

import Isabelle.MarkSimp

import Common.AS_Annotation

import Common.DocUtils

import Common.DefaultMorphism

import Common.ProofUtils

import Common.Utils (getEnvDef)

import qualified Data.Map as Map

import qualified Data.Set as Set

import Text.ParserCombinators.Parsec

import Data.Char

import Data.List (isSuffixOf)

import Control.Monad

import Data.Time (midnight)

import System.Directory

import System.Exit

import System.Cmd

isabelleS :: String

isabelleS = "Isabelle"

openIsaProofStatus :: String -> ProofStatus ()

openIsaProofStatus n = openProofStatus n isabelleS ()

isabelleProver :: Prover Sign Sentence (DefaultMorphism Sign) () ()

isabelleProver = mkProverTemplate isabelleS () isaProve

isabelleConsChecker :: ConsChecker Sign Sentence () (DefaultMorphism Sign) ()

isabelleConsChecker = ConsChecker "Isabelle-refute" () consCheck

-- | the name of the inconsistent lemma for consistency checks

inconsistentS :: String

inconsistentS = "inconsistent"

metaToTerm :: MetaTerm -> Term

metaToTerm mt = case mt of

Term t -> t

Conditional ts t -> case ts of

[] -> t

_ -> binImpl (foldr1 binConj ts) t

consCheck :: String -> b

-> TheoryMorphism Sign Sentence (DefaultMorphism Sign) () -> a

-> IO (CCStatus ())

consCheck thName _tac tm freedefs = case tTarget tm of

Theory sig nSens -> do

let (axs, _) = getAxioms $ toNamedList nSens

l <- isaProve (thName ++ "_c")

(Theory sig

$ markAsGoal $ toThSens $ if null axs then [] else

[ makeNamed inconsistentS $ mkRefuteSen $ termAppl notOp

$ foldr1 binConj

$ map (metaToTerm . metaTerm . sentence) axs ])

freedefs

return $ CCStatus () midnight $ case l of

[_] -> Just False -- inconsistency was proven

_ -> Nothing -- consistency cannot be recorded automatically

prepareTheory :: Theory Sign Sentence ()

-> (Sign, [Named Sentence], [Named Sentence], Map.Map String String)

prepareTheory (Theory sig nSens) = let

oSens = toNamedList nSens

nSens' = prepareSenNames transString oSens

(disAxs, disGoals) = getAxioms nSens'

in (sig, map markSimp disAxs, map markThSimp disGoals,

Map.fromList $ zip (map senAttr nSens') $ map senAttr oSens)

-- return a reverse mapping for renamed sentences

removeDepFiles :: String -> [String] -> IO ()

removeDepFiles thName = mapM_ $ \ thm -> do

let depFile = getDepsFileName thName thm

ex <- doesFileExist depFile

when ex $ removeFile depFile

getDepsFileName :: String -> String -> String

getDepsFileName thName thm = thName ++ "_" ++ thm ++ ".deps"

getProofDeps :: Map.Map String String -> String -> String

-> IO (ProofStatus ())

getProofDeps m thName thm = do

let file = getDepsFileName thName thm

mapN n = Map.findWithDefault n n m

strip = takeWhile (not . isSpace) . dropWhile isSpace

b <- doesFileExist file

if b then do

s <- readFile file

return $ mkProved (mapN thm) $ map mapN $

Set.toList $ Set.filter (not . null) $

Set.fromList $ map strip $ lines s

else return $ openIsaProofStatus $ mapN thm

getAllProofDeps :: Map.Map String String -> String -> [String]

-> IO([ProofStatus ()])

getAllProofDeps m = mapM . getProofDeps m

checkFinalThyFile :: (TheoryHead, Body) -> String -> IO Bool

checkFinalThyFile (ho, bo) thyFile = do

s <- readFile thyFile

case parse parseTheory thyFile s of

Right (hb, b) -> do

let ds = compatibleBodies bo b

mapM_ (\ d -> putStrLn $ showDoc d "") $ ds ++ warnSimpAttr b

if hb /= ho then do

putStrLn "illegal change of theory header"

return False

else return $ null ds

Left err -> print err >> return False

mkProved :: String -> [String] -> ProofStatus ()

mkProved thm used = (openIsaProofStatus thm)

{ goalStatus = Proved Nothing

, usedAxioms = used

, tacticScript = TacticScript "unknown isabelle user input"

}

prepareThyFiles :: (TheoryHead, Body) -> String -> String -> IO ()

prepareThyFiles ast thyFile thy = do

let origFile = thyFile ++ ".orig"

exOrig <- doesFileExist origFile

exThyFile <- doesFileExist thyFile

unless exOrig $ writeFile origFile thy

unless exThyFile $ writeFile thyFile thy

thy_time <- getModificationTime thyFile

orig_time <- getModificationTime origFile

s <- readFile origFile

unless (thy_time >= orig_time && s == thy)

$ patchThyFile ast origFile thyFile thy

patchThyFile :: (TheoryHead, Body) -> FilePath -> FilePath -> String -> IO ()

patchThyFile (ho, bo) origFile thyFile thy = do

let patchFile = thyFile ++ ".patch"

oldFile = thyFile ++ ".old"

diffCall = "diff -u " ++ origFile ++ " " ++ thyFile

++ " > " ++ patchFile

patchCall = "patch -bfu " ++ thyFile ++ " " ++ patchFile

callSystem diffCall

renameFile thyFile oldFile

removeFile origFile

writeFile origFile thy

writeFile thyFile thy

callSystem patchCall

s <- readFile thyFile

case parse parseTheory thyFile s of

Right (hb, b) -> do

let ds = compatibleBodies bo b

h = hb == ho

mapM_ (\ d -> putStrLn $ showDoc d "") ds

unless h $ putStrLn "theory header is corrupt"

unless (h && null ds) $ revertThyFile thyFile thy

Left err -> do

print err

revertThyFile thyFile thy

revertThyFile :: String -> String -> IO ()

revertThyFile thyFile thy = do

putStrLn $ "replacing corrupt file " ++ show thyFile

removeFile thyFile

writeFile thyFile thy

callSystem :: String -> IO ExitCode

callSystem s = putStrLn s >> system s

isaProve :: String -> Theory Sign Sentence () -> a -> IO([ProofStatus ()])

isaProve thName th _freedefs = do

let (sig, axs, ths, m) = prepareTheory th

thms = map senAttr ths

thBaseName = reverse . takeWhile (/= '/') $ reverse thName

useaxs = filter (\ s ->

sentence s /= mkSen true && (isDef s ||

isSuffixOf "def" (senAttr s))) axs

defaultProof = Just $ IsaProof

(if null useaxs then [] else [Using $ map senAttr useaxs])

$ By Auto

thy = shows (printIsaTheory thBaseName sig

$ axs ++ map (mapNamed $ \ t -> case t of

Sentence { thmProof = Nothing } -> t { thmProof = defaultProof }

_ -> t) ths)

"\n"

thyFile = thBaseName ++ ".thy"

case parse parseTheory thyFile thy of

Right (ho, bo) -> do

prepareThyFiles (ho, bo) thyFile thy

removeDepFiles thBaseName thms

isabelle <- getEnvDef "HETS_ISABELLE" "Isabelle"

callSystem $ isabelle ++ " " ++ thyFile

ok <- checkFinalThyFile (ho, bo) thyFile

if ok then getAllProofDeps m thBaseName thms

else return []

Left err -> do

print err

putStrLn $ "Sorry, generated theory cannot be parsed, see: " ++ thyFile

writeFile thyFile thy

putStrLn "aborting Isabelle proof attempt"

return []