author | wenzelm |
Sun, 18 May 2008 15:04:09 +0200 | |
changeset 26939 | 1035c89b4c02 |
parent 26328 | b2d6f520172c |
child 27330 | 1af2598b5f7d |
permissions | -rw-r--r-- |
11522 | 1 |
(* Title: Pure/Proof/reconstruct.ML |
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ID: $Id$ |
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Author: Stefan Berghofer, TU Muenchen |
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Reconstruction of partial proof terms. |
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*) |
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signature RECONSTRUCT = |
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sig |
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val quiet_mode : bool ref |
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val reconstruct_proof : theory -> term -> Proofterm.proof -> Proofterm.proof |
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val prop_of' : term list -> Proofterm.proof -> term |
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val prop_of : Proofterm.proof -> term |
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val expand_proof : theory -> (string * term option) list -> |
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Proofterm.proof -> Proofterm.proof |
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end; |
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structure Reconstruct : RECONSTRUCT = |
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struct |
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open Proofterm; |
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val quiet_mode = ref true; |
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fun message s = if !quiet_mode then () else writeln s; |
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||
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fun vars_of t = rev (fold_aterms |
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(fn v as Var _ => insert (op =) v | _ => I) t []); |
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fun forall_intr t prop = |
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let val (a, T) = (case t of Var ((a, _), T) => (a, T) | Free p => p) |
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in all T $ Abs (a, T, abstract_over (t, prop)) end; |
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fun forall_intr_vfs prop = fold_rev forall_intr |
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(vars_of prop @ sort Term.term_ord (term_frees prop)) prop; |
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fun forall_intr_prf t prf = |
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let val (a, T) = (case t of Var ((a, _), T) => (a, T) | Free p => p) |
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in Abst (a, SOME T, prf_abstract_over t prf) end; |
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|
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fun forall_intr_vfs_prf prop prf = fold_rev forall_intr_prf |
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(vars_of prop @ sort Term.term_ord (term_frees prop)) prf; |
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fun merge_envs (Envir.Envir {asol=asol1, iTs=iTs1, maxidx=maxidx1}) |
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(Envir.Envir {asol=asol2, iTs=iTs2, maxidx=maxidx2}) = |
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Envir.Envir {asol=Vartab.merge (op =) (asol1, asol2), |
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iTs=Vartab.merge (op =) (iTs1, iTs2), |
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maxidx=Int.max (maxidx1, maxidx2)}; |
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(**** generate constraints for proof term ****) |
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|
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fun mk_var env Ts T = |
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let val (env', v) = Envir.genvar "a" (env, rev Ts ---> T) |
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in (env', list_comb (v, map Bound (length Ts - 1 downto 0))) end; |
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fun mk_tvar (Envir.Envir {iTs, asol, maxidx}, s) = |
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(Envir.Envir {iTs = iTs, asol = asol, maxidx = maxidx+1}, |
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TVar (("'t", maxidx+1), s)); |
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val mk_abs = fold (fn T => fn u => Abs ("", T, u)); |
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fun unifyT thy env T U = |
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let |
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val Envir.Envir {asol, iTs, maxidx} = env; |
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val (iTs', maxidx') = Sign.typ_unify thy (T, U) (iTs, maxidx) |
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in Envir.Envir {asol=asol, iTs=iTs', maxidx=maxidx'} end |
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handle Type.TUNIFY => error ("Non-unifiable types:\n" ^ |
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Syntax.string_of_typ_global thy T ^ "\n\n" ^ Syntax.string_of_typ_global thy U); |
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fun chaseT (env as Envir.Envir {iTs, ...}) (T as TVar ixnS) = |
26328 | 71 |
(case Type.lookup iTs ixnS of NONE => T | SOME T' => chaseT env T') |
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| chaseT _ T = T; |
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fun infer_type thy (env as Envir.Envir {maxidx, asol, iTs}) Ts vTs |
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(t as Const (s, T)) = if T = dummyT then (case Sign.const_type thy s of |
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NONE => error ("reconstruct_proof: No such constant: " ^ quote s) |
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| SOME T => |
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let val T' = Type.strip_sorts (Logic.incr_tvar (maxidx + 1) T) |
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in (Const (s, T'), T', vTs, |
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Envir.Envir {maxidx = maxidx + 1, asol = asol, iTs = iTs}) |
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end) |
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else (t, T, vTs, env) |
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| infer_type thy env Ts vTs (t as Free (s, T)) = |
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if T = dummyT then (case Symtab.lookup vTs s of |
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NONE => |
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let val (env', T) = mk_tvar (env, []) |
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in (Free (s, T), T, Symtab.update_new (s, T) vTs, env') end |
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| SOME T => (Free (s, T), T, vTs, env)) |
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else (t, T, vTs, env) |
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| infer_type thy env Ts vTs (Var _) = error "reconstruct_proof: internal error" |
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| infer_type thy env Ts vTs (Abs (s, T, t)) = |
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let |
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val (env', T') = if T = dummyT then mk_tvar (env, []) else (env, T); |
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val (t', U, vTs', env'') = infer_type thy env' (T' :: Ts) vTs t |
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in (Abs (s, T', t'), T' --> U, vTs', env'') end |
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| infer_type thy env Ts vTs (t $ u) = |
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let |
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val (t', T, vTs1, env1) = infer_type thy env Ts vTs t; |
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val (u', U, vTs2, env2) = infer_type thy env1 Ts vTs1 u; |
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in (case chaseT env2 T of |
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Type ("fun", [U', V]) => (t' $ u', V, vTs2, unifyT thy env2 U U') |
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| _ => |
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let val (env3, V) = mk_tvar (env2, []) |
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in (t' $ u', V, vTs2, unifyT thy env3 T (U --> V)) end) |
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end |
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| infer_type thy env Ts vTs (t as Bound i) = ((t, List.nth (Ts, i), vTs, env) |
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handle Subscript => error ("infer_type: bad variable index " ^ string_of_int i)); |
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fun cantunify thy (t, u) = error ("Non-unifiable terms:\n" ^ |
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Syntax.string_of_term_global thy t ^ "\n\n" ^ Syntax.string_of_term_global thy u); |
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fun decompose thy Ts (env, p as (t, u)) = |
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let fun rigrig (a, T) (b, U) uT ts us = if a <> b then cantunify thy p |
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else apsnd flat (foldl_map (decompose thy Ts) (uT env T U, ts ~~ us)) |
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in case pairself (strip_comb o Envir.head_norm env) p of |
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((Const c, ts), (Const d, us)) => rigrig c d (unifyT thy) ts us |
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| ((Free c, ts), (Free d, us)) => rigrig c d (unifyT thy) ts us |
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| ((Bound i, ts), (Bound j, us)) => |
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rigrig (i, dummyT) (j, dummyT) (K o K) ts us |
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| ((Abs (_, T, t), []), (Abs (_, U, u), [])) => |
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decompose thy (T::Ts) (unifyT thy env T U, (t, u)) |
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| ((Abs (_, T, t), []), _) => |
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decompose thy (T::Ts) (env, (t, incr_boundvars 1 u $ Bound 0)) |
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| (_, (Abs (_, T, u), [])) => |
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decompose thy (T::Ts) (env, (incr_boundvars 1 t $ Bound 0, u)) |
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| _ => (env, [(mk_abs Ts t, mk_abs Ts u)]) |
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end; |
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|
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fun make_constraints_cprf thy env cprf = |
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let |
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fun add_cnstrt Ts prop prf cs env vTs (t, u) = |
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let |
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val t' = mk_abs Ts t; |
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val u' = mk_abs Ts u |
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in |
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(prop, prf, cs, Pattern.unify thy (t', u') env, vTs) |
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handle Pattern.Pattern => |
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let val (env', cs') = decompose thy [] (env, (t', u')) |
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in (prop, prf, cs @ cs', env', vTs) end |
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| Pattern.Unif => |
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cantunify thy (Envir.norm_term env t', Envir.norm_term env u') |
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end; |
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fun mk_cnstrts_atom env vTs prop opTs prf = |
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let |
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val tvars = term_tvars prop; |
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val tfrees = term_tfrees prop; |
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val (fmap, prop') = Type.varify [] prop; |
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val (env', Ts) = (case opTs of |
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NONE => foldl_map mk_tvar (env, map snd tvars @ map snd tfrees) |
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| SOME Ts => (env, Ts)); |
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val prop'' = subst_TVars (map fst tvars @ map snd fmap ~~ Ts) |
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(forall_intr_vfs prop') handle Library.UnequalLengths => |
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error ("Wrong number of type arguments for " ^ |
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quote (get_name [] prop prf)) |
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in (prop'', change_type (SOME Ts) prf, [], env', vTs) end; |
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fun head_norm (prop, prf, cnstrts, env, vTs) = |
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(Envir.head_norm env prop, prf, cnstrts, env, vTs); |
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fun mk_cnstrts env _ Hs vTs (PBound i) = ((List.nth (Hs, i), PBound i, [], env, vTs) |
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handle Subscript => error ("mk_cnstrts: bad variable index " ^ string_of_int i)) |
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| mk_cnstrts env Ts Hs vTs (Abst (s, opT, cprf)) = |
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let |
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val (env', T) = (case opT of |
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NONE => mk_tvar (env, []) | SOME T => (env, T)); |
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val (t, prf, cnstrts, env'', vTs') = |
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mk_cnstrts env' (T::Ts) (map (incr_boundvars 1) Hs) vTs cprf; |
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in (Const ("all", (T --> propT) --> propT) $ Abs (s, T, t), Abst (s, SOME T, prf), |
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170 |
cnstrts, env'', vTs') |
11522 | 171 |
end |
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| mk_cnstrts env Ts Hs vTs (AbsP (s, SOME t, cprf)) = |
11522 | 173 |
let |
20312 | 174 |
val (t', _, vTs', env') = infer_type thy env Ts vTs t; |
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val (u, prf, cnstrts, env'', vTs'') = mk_cnstrts env' Ts (t'::Hs) vTs' cprf; |
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in (Logic.mk_implies (t', u), AbsP (s, SOME t', prf), cnstrts, env'', vTs'') |
11522 | 177 |
end |
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| mk_cnstrts env Ts Hs vTs (AbsP (s, NONE, cprf)) = |
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let |
180 |
val (env', t) = mk_var env Ts propT; |
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val (u, prf, cnstrts, env'', vTs') = mk_cnstrts env' Ts (t::Hs) vTs cprf; |
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in (Logic.mk_implies (t, u), AbsP (s, SOME t, prf), cnstrts, env'', vTs') |
11522 | 183 |
end |
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184 |
| mk_cnstrts env Ts Hs vTs (cprf1 %% cprf2) = |
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let val (u, prf2, cnstrts, env', vTs') = mk_cnstrts env Ts Hs vTs cprf2 |
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in (case head_norm (mk_cnstrts env' Ts Hs vTs' cprf1) of |
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(Const ("==>", _) $ u' $ t', prf1, cnstrts', env'', vTs'') => |
11613 | 188 |
add_cnstrt Ts t' (prf1 %% prf2) (cnstrts' @ cnstrts) |
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env'' vTs'' (u, u') |
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190 |
| (t, prf1, cnstrts', env'', vTs'') => |
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let val (env''', v) = mk_var env'' Ts propT |
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in add_cnstrt Ts v (prf1 %% prf2) (cnstrts' @ cnstrts) |
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193 |
env''' vTs'' (t, Logic.mk_implies (u, v)) |
11522 | 194 |
end) |
195 |
end |
|
15531 | 196 |
| mk_cnstrts env Ts Hs vTs (cprf % SOME t) = |
20312 | 197 |
let val (t', U, vTs1, env1) = infer_type thy env Ts vTs t |
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in (case head_norm (mk_cnstrts env1 Ts Hs vTs1 cprf) of |
11522 | 199 |
(Const ("all", Type ("fun", [Type ("fun", [T, _]), _])) $ f, |
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200 |
prf, cnstrts, env2, vTs2) => |
20312 | 201 |
let val env3 = unifyT thy env2 T U |
15531 | 202 |
in (betapply (f, t'), prf % SOME t', cnstrts, env3, vTs2) |
11522 | 203 |
end |
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| (u, prf, cnstrts, env2, vTs2) => |
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205 |
let val (env3, v) = mk_var env2 Ts (U --> propT); |
11522 | 206 |
in |
15531 | 207 |
add_cnstrt Ts (v $ t') (prf % SOME t') cnstrts env3 vTs2 |
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208 |
(u, Const ("all", (U --> propT) --> propT) $ v) |
11522 | 209 |
end) |
210 |
end |
|
15531 | 211 |
| mk_cnstrts env Ts Hs vTs (cprf % NONE) = |
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|
212 |
(case head_norm (mk_cnstrts env Ts Hs vTs cprf) of |
11522 | 213 |
(Const ("all", Type ("fun", [Type ("fun", [T, _]), _])) $ f, |
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|
214 |
prf, cnstrts, env', vTs') => |
11522 | 215 |
let val (env'', t) = mk_var env' Ts T |
15531 | 216 |
in (betapply (f, t), prf % SOME t, cnstrts, env'', vTs') |
11522 | 217 |
end |
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|
218 |
| (u, prf, cnstrts, env', vTs') => |
11522 | 219 |
let |
14854 | 220 |
val (env1, T) = mk_tvar (env', []); |
11522 | 221 |
val (env2, v) = mk_var env1 Ts (T --> propT); |
222 |
val (env3, t) = mk_var env2 Ts T |
|
223 |
in |
|
15531 | 224 |
add_cnstrt Ts (v $ t) (prf % SOME t) cnstrts env3 vTs' |
11522 | 225 |
(u, Const ("all", (T --> propT) --> propT) $ v) |
226 |
end) |
|
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|
227 |
| mk_cnstrts env _ _ vTs (prf as PThm (_, _, prop, opTs)) = |
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|
228 |
mk_cnstrts_atom env vTs prop opTs prf |
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|
229 |
| mk_cnstrts env _ _ vTs (prf as PAxm (_, prop, opTs)) = |
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230 |
mk_cnstrts_atom env vTs prop opTs prf |
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|
231 |
| mk_cnstrts env _ _ vTs (prf as Oracle (_, prop, opTs)) = |
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|
232 |
mk_cnstrts_atom env vTs prop opTs prf |
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|
233 |
| mk_cnstrts env _ _ vTs (Hyp t) = (t, Hyp t, [], env, vTs) |
11613 | 234 |
| mk_cnstrts _ _ _ _ _ = error "reconstruct_proof: minimal proof object" |
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|
235 |
in mk_cnstrts env [] [] Symtab.empty cprf end; |
11522 | 236 |
|
237 |
||
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|
238 |
(**** update list of free variables of constraints ****) |
11522 | 239 |
|
20675 | 240 |
val add_term_ixns = fold_aterms (fn Var (xi, _) => insert (op =) xi | _ => I); |
241 |
val add_typ_ixns = fold_atyps (fn TVar (ai, _) => insert (op =) ai | _ => I); |
|
242 |
||
11522 | 243 |
fun upd_constrs env cs = |
244 |
let |
|
245 |
val Envir.Envir {asol, iTs, ...} = env; |
|
20675 | 246 |
val dom = [] |
247 |
|> Vartab.fold (cons o #1) asol |
|
248 |
|> Vartab.fold (cons o #1) iTs; |
|
249 |
val vran = [] |
|
250 |
|> Vartab.fold (add_term_ixns o #2 o #2) asol |
|
251 |
|> Vartab.fold (add_typ_ixns o #2 o #2) iTs; |
|
11522 | 252 |
fun check_cs [] = [] |
253 |
| check_cs ((u, p, vs)::ps) = |
|
19305 | 254 |
let val vs' = subtract (op =) dom vs; |
11522 | 255 |
in if vs = vs' then (u, p, vs)::check_cs ps |
20675 | 256 |
else (true, p, fold (insert (op =)) vs' vran)::check_cs ps |
11522 | 257 |
end |
258 |
in check_cs cs end; |
|
259 |
||
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|
260 |
(**** solution of constraints ****) |
11522 | 261 |
|
262 |
fun solve _ [] bigenv = bigenv |
|
20312 | 263 |
| solve thy cs bigenv = |
11522 | 264 |
let |
11660 | 265 |
fun search env [] = error ("Unsolvable constraints:\n" ^ |
266 |
Pretty.string_of (Pretty.chunks (map (fn (_, p, _) => |
|
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moved global pretty/string_of functions from Sign to Syntax;
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changeset
|
267 |
Display.pretty_flexpair (Syntax.pp_global thy) (pairself |
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|
268 |
(Envir.norm_term bigenv) p)) cs))) |
11522 | 269 |
| search env ((u, p as (t1, t2), vs)::ps) = |
270 |
if u then |
|
271 |
let |
|
272 |
val tn1 = Envir.norm_term bigenv t1; |
|
273 |
val tn2 = Envir.norm_term bigenv t2 |
|
274 |
in |
|
275 |
if Pattern.pattern tn1 andalso Pattern.pattern tn2 then |
|
20312 | 276 |
(Pattern.unify thy (tn1, tn2) env, ps) handle Pattern.Unif => |
277 |
cantunify thy (tn1, tn2) |
|
11522 | 278 |
else |
20312 | 279 |
let val (env', cs') = decompose thy [] (env, (tn1, tn2)) |
11522 | 280 |
in if cs' = [(tn1, tn2)] then |
281 |
apsnd (cons (false, (tn1, tn2), vs)) (search env ps) |
|
282 |
else search env' (map (fn q => (true, q, vs)) cs' @ ps) |
|
283 |
end |
|
284 |
end |
|
285 |
else apsnd (cons (false, p, vs)) (search env ps); |
|
286 |
val Envir.Envir {maxidx, ...} = bigenv; |
|
287 |
val (env, cs') = search (Envir.empty maxidx) cs; |
|
288 |
in |
|
20312 | 289 |
solve thy (upd_constrs env cs') (merge_envs bigenv env) |
11522 | 290 |
end; |
291 |
||
292 |
||
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changeset
|
293 |
(**** reconstruction of proofs ****) |
11522 | 294 |
|
20312 | 295 |
fun reconstruct_proof thy prop cprf = |
11522 | 296 |
let |
15531 | 297 |
val (cprf' % SOME prop', thawf) = freeze_thaw_prf (cprf % SOME prop); |
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changeset
|
298 |
val _ = message "Collecting constraints..."; |
20312 | 299 |
val (t, prf, cs, env, _) = make_constraints_cprf thy |
300 |
(Envir.empty (maxidx_proof cprf ~1)) cprf'; |
|
11522 | 301 |
val cs' = map (fn p => (true, p, op union |
20312 | 302 |
(pairself (map (fst o dest_Var) o term_vars) p))) |
303 |
(map (pairself (Envir.norm_term env)) ((t, prop')::cs)); |
|
11522 | 304 |
val _ = message ("Solving remaining constraints (" ^ string_of_int (length cs') ^ ") ..."); |
20312 | 305 |
val env' = solve thy cs' env |
11522 | 306 |
in |
307 |
thawf (norm_proof env' prf) |
|
308 |
end; |
|
309 |
||
13256
cf85c4f7dcf2
Added function prop_of' taking assumption context as an argument.
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parents:
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diff
changeset
|
310 |
fun prop_of_atom prop Ts = |
21116 | 311 |
let val (fmap, prop') = Type.varify [] prop; |
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changeset
|
312 |
in subst_TVars (map fst (term_tvars prop) @ map snd fmap ~~ Ts) |
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- reconstruct_proof no longer relies on TypeInfer.infer_types
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changeset
|
313 |
(forall_intr_vfs prop') |
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- reconstruct_proof no longer relies on TypeInfer.infer_types
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changeset
|
314 |
end; |
13138 | 315 |
|
13734
50dcee1c509e
prop_of now returns proposition in beta-eta normal form.
berghofe
parents:
13715
diff
changeset
|
316 |
val head_norm = Envir.head_norm (Envir.empty 0); |
50dcee1c509e
prop_of now returns proposition in beta-eta normal form.
berghofe
parents:
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diff
changeset
|
317 |
|
15570 | 318 |
fun prop_of0 Hs (PBound i) = List.nth (Hs, i) |
15531 | 319 |
| prop_of0 Hs (Abst (s, SOME T, prf)) = |
13734
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prop_of now returns proposition in beta-eta normal form.
berghofe
parents:
13715
diff
changeset
|
320 |
all T $ (Abs (s, T, prop_of0 Hs prf)) |
15531 | 321 |
| prop_of0 Hs (AbsP (s, SOME t, prf)) = |
13734
50dcee1c509e
prop_of now returns proposition in beta-eta normal form.
berghofe
parents:
13715
diff
changeset
|
322 |
Logic.mk_implies (t, prop_of0 (t :: Hs) prf) |
15531 | 323 |
| prop_of0 Hs (prf % SOME t) = (case head_norm (prop_of0 Hs prf) of |
13734
50dcee1c509e
prop_of now returns proposition in beta-eta normal form.
berghofe
parents:
13715
diff
changeset
|
324 |
Const ("all", _) $ f => f $ t |
13256
cf85c4f7dcf2
Added function prop_of' taking assumption context as an argument.
berghofe
parents:
13138
diff
changeset
|
325 |
| _ => error "prop_of: all expected") |
13734
50dcee1c509e
prop_of now returns proposition in beta-eta normal form.
berghofe
parents:
13715
diff
changeset
|
326 |
| prop_of0 Hs (prf1 %% prf2) = (case head_norm (prop_of0 Hs prf1) of |
13256
cf85c4f7dcf2
Added function prop_of' taking assumption context as an argument.
berghofe
parents:
13138
diff
changeset
|
327 |
Const ("==>", _) $ P $ Q => Q |
cf85c4f7dcf2
Added function prop_of' taking assumption context as an argument.
berghofe
parents:
13138
diff
changeset
|
328 |
| _ => error "prop_of: ==> expected") |
13734
50dcee1c509e
prop_of now returns proposition in beta-eta normal form.
berghofe
parents:
13715
diff
changeset
|
329 |
| prop_of0 Hs (Hyp t) = t |
15531 | 330 |
| prop_of0 Hs (PThm (_, _, prop, SOME Ts)) = prop_of_atom prop Ts |
331 |
| prop_of0 Hs (PAxm (_, prop, SOME Ts)) = prop_of_atom prop Ts |
|
332 |
| prop_of0 Hs (Oracle (_, prop, SOME Ts)) = prop_of_atom prop Ts |
|
13734
50dcee1c509e
prop_of now returns proposition in beta-eta normal form.
berghofe
parents:
13715
diff
changeset
|
333 |
| prop_of0 _ _ = error "prop_of: partial proof object"; |
13138 | 334 |
|
18929 | 335 |
val prop_of' = Envir.beta_eta_contract oo prop_of0; |
13256
cf85c4f7dcf2
Added function prop_of' taking assumption context as an argument.
berghofe
parents:
13138
diff
changeset
|
336 |
val prop_of = prop_of' []; |
13138 | 337 |
|
11522 | 338 |
|
13669
a9f229eafba7
- reconstruct_proof no longer relies on TypeInfer.infer_types
berghofe
parents:
13610
diff
changeset
|
339 |
(**** expand and reconstruct subproofs ****) |
11522 | 340 |
|
20312 | 341 |
fun expand_proof thy thms prf = |
11522 | 342 |
let |
23178 | 343 |
fun expand maxidx prfs (AbsP (s, t, prf)) = |
12870
3905bc0e9002
Indexes of variables in expanded proofs are now incremented to avoid clashes.
berghofe
parents:
12527
diff
changeset
|
344 |
let val (maxidx', prfs', prf') = expand maxidx prfs prf |
3905bc0e9002
Indexes of variables in expanded proofs are now incremented to avoid clashes.
berghofe
parents:
12527
diff
changeset
|
345 |
in (maxidx', prfs', AbsP (s, t, prf')) end |
23178 | 346 |
| expand maxidx prfs (Abst (s, T, prf)) = |
12870
3905bc0e9002
Indexes of variables in expanded proofs are now incremented to avoid clashes.
berghofe
parents:
12527
diff
changeset
|
347 |
let val (maxidx', prfs', prf') = expand maxidx prfs prf |
3905bc0e9002
Indexes of variables in expanded proofs are now incremented to avoid clashes.
berghofe
parents:
12527
diff
changeset
|
348 |
in (maxidx', prfs', Abst (s, T, prf')) end |
3905bc0e9002
Indexes of variables in expanded proofs are now incremented to avoid clashes.
berghofe
parents:
12527
diff
changeset
|
349 |
| expand maxidx prfs (prf1 %% prf2) = |
11522 | 350 |
let |
12870
3905bc0e9002
Indexes of variables in expanded proofs are now incremented to avoid clashes.
berghofe
parents:
12527
diff
changeset
|
351 |
val (maxidx', prfs', prf1') = expand maxidx prfs prf1; |
3905bc0e9002
Indexes of variables in expanded proofs are now incremented to avoid clashes.
berghofe
parents:
12527
diff
changeset
|
352 |
val (maxidx'', prfs'', prf2') = expand maxidx' prfs' prf2; |
3905bc0e9002
Indexes of variables in expanded proofs are now incremented to avoid clashes.
berghofe
parents:
12527
diff
changeset
|
353 |
in (maxidx'', prfs'', prf1' %% prf2') end |
3905bc0e9002
Indexes of variables in expanded proofs are now incremented to avoid clashes.
berghofe
parents:
12527
diff
changeset
|
354 |
| expand maxidx prfs (prf % t) = |
3905bc0e9002
Indexes of variables in expanded proofs are now incremented to avoid clashes.
berghofe
parents:
12527
diff
changeset
|
355 |
let val (maxidx', prfs', prf') = expand maxidx prfs prf |
3905bc0e9002
Indexes of variables in expanded proofs are now incremented to avoid clashes.
berghofe
parents:
12527
diff
changeset
|
356 |
in (maxidx', prfs', prf' % t) end |
21646
c07b5b0e8492
thm/prf: separate official name vs. additional tags;
wenzelm
parents:
21116
diff
changeset
|
357 |
| expand maxidx prfs (prf as PThm (a, cprf, prop, SOME Ts)) = |
13342
915d4d004643
expand_proof now also takes an optional term describing the proposition
berghofe
parents:
13256
diff
changeset
|
358 |
if not (exists |
15531 | 359 |
(fn (b, NONE) => a = b |
360 |
| (b, SOME prop') => a = b andalso prop = prop') thms) |
|
13342
915d4d004643
expand_proof now also takes an optional term describing the proposition
berghofe
parents:
13256
diff
changeset
|
361 |
then (maxidx, prfs, prf) else |
11522 | 362 |
let |
13610
d4a2ac255447
Fixed bug in expand_proof which caused indexes to be incremented incorrectly.
berghofe
parents:
13342
diff
changeset
|
363 |
fun inc i = |
16876 | 364 |
map_proof_terms (Logic.incr_indexes ([], i)) (Logic.incr_tvar i); |
16862 | 365 |
val (maxidx', prf, prfs') = |
17232 | 366 |
(case AList.lookup (op =) prfs (a, prop) of |
15531 | 367 |
NONE => |
11522 | 368 |
let |
369 |
val _ = message ("Reconstructing proof of " ^ a); |
|
26939
1035c89b4c02
moved global pretty/string_of functions from Sign to Syntax;
wenzelm
parents:
26328
diff
changeset
|
370 |
val _ = message (Syntax.string_of_term_global thy prop); |
13610
d4a2ac255447
Fixed bug in expand_proof which caused indexes to be incremented incorrectly.
berghofe
parents:
13342
diff
changeset
|
371 |
val prf' = forall_intr_vfs_prf prop |
20312 | 372 |
(reconstruct_proof thy prop cprf); |
12870
3905bc0e9002
Indexes of variables in expanded proofs are now incremented to avoid clashes.
berghofe
parents:
12527
diff
changeset
|
373 |
val (maxidx', prfs', prf) = expand |
20312 | 374 |
(maxidx_proof prf' ~1) prfs prf' |
13669
a9f229eafba7
- reconstruct_proof no longer relies on TypeInfer.infer_types
berghofe
parents:
13610
diff
changeset
|
375 |
in (maxidx' + maxidx + 1, inc (maxidx + 1) prf, |
13610
d4a2ac255447
Fixed bug in expand_proof which caused indexes to be incremented incorrectly.
berghofe
parents:
13342
diff
changeset
|
376 |
((a, prop), (maxidx', prf)) :: prfs') |
d4a2ac255447
Fixed bug in expand_proof which caused indexes to be incremented incorrectly.
berghofe
parents:
13342
diff
changeset
|
377 |
end |
15531 | 378 |
| SOME (maxidx', prf) => (maxidx' + maxidx + 1, |
13669
a9f229eafba7
- reconstruct_proof no longer relies on TypeInfer.infer_types
berghofe
parents:
13610
diff
changeset
|
379 |
inc (maxidx + 1) prf, prfs)); |
a9f229eafba7
- reconstruct_proof no longer relies on TypeInfer.infer_types
berghofe
parents:
13610
diff
changeset
|
380 |
val tfrees = term_tfrees prop; |
a9f229eafba7
- reconstruct_proof no longer relies on TypeInfer.infer_types
berghofe
parents:
13610
diff
changeset
|
381 |
val tye = map (fn ((s, j), _) => (s, maxidx + 1 + j)) |
a9f229eafba7
- reconstruct_proof no longer relies on TypeInfer.infer_types
berghofe
parents:
13610
diff
changeset
|
382 |
(term_tvars prop) @ map (rpair ~1 o fst) tfrees ~~ Ts; |
a9f229eafba7
- reconstruct_proof no longer relies on TypeInfer.infer_types
berghofe
parents:
13610
diff
changeset
|
383 |
val varify = map_type_tfree (fn p as (a, S) => |
20675 | 384 |
if member (op =) tfrees p then TVar ((a, ~1), S) else TFree p) |
11522 | 385 |
in |
13669
a9f229eafba7
- reconstruct_proof no longer relies on TypeInfer.infer_types
berghofe
parents:
13610
diff
changeset
|
386 |
(maxidx', prfs', map_proof_terms (subst_TVars tye o |
20548
8ef25fe585a8
renamed Term.map_term_types to Term.map_types (cf. Term.fold_types);
wenzelm
parents:
20312
diff
changeset
|
387 |
map_types varify) (typ_subst_TVars tye o varify) prf) |
11522 | 388 |
end |
12870
3905bc0e9002
Indexes of variables in expanded proofs are now incremented to avoid clashes.
berghofe
parents:
12527
diff
changeset
|
389 |
| expand maxidx prfs prf = (maxidx, prfs, prf); |
11522 | 390 |
|
20312 | 391 |
in #3 (expand (maxidx_proof prf ~1) [] prf) end; |
11522 | 392 |
|
393 |
end; |