author | wenzelm |
Tue, 31 May 2005 11:53:43 +0200 | |
changeset 16152 | 7294283b0c45 |
parent 15570 | 8d8c70b41bab |
child 16429 | e871f4b1a4f0 |
permissions | -rw-r--r-- |
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(* $Id$ *) |
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(* search_mu t searches for Mu terms in term t. In the case of nested Mu's, |
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it yields innermost one. If no Mu term is present, search_mu yields NONE |
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*) |
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(* extended for treatment of nu (TH) *) |
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fun search_mu ((Const("MuCalculus.mu",tp)) $ t2) = |
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(case (search_mu t2) of |
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SOME t => SOME t |
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| NONE => SOME ((Const("MuCalculus.mu",tp)) $ t2)) |
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| search_mu ((Const("MuCalculus.nu",tp)) $ t2) = |
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(case (search_mu t2) of |
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SOME t => SOME t |
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| NONE => SOME ((Const("MuCalculus.nu",tp)) $ t2)) |
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| search_mu (t1 $ t2) = |
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(case (search_mu t1) of |
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SOME t => SOME t |
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| NONE => search_mu t2) |
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| search_mu (Abs(_,_,t)) = search_mu t |
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| search_mu _ = NONE; |
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(* seraching a variable in a term. Used in move_mus to extract the |
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term-rep of var b in hthm *) |
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fun search_var s t = |
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case t of |
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t1 $ t2 => (case (search_var s t1) of |
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SOME tt => SOME tt | |
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NONE => search_var s t2) | |
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Abs(_,_,t) => search_var s t | |
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Var((s1,_),_) => if s = s1 then SOME t else NONE | |
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_ => NONE; |
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(* function move_mus: |
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Mucke can't deal with nested Mu terms. move_mus i searches for |
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Mu terms in the subgoal i and replaces Mu terms in the conclusion |
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by constants and definitions in the premises recursively. |
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move_thm is the theorem the performs the replacement. To create NEW |
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names for the Mu terms, the indizes of move_thm are incremented by |
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max_idx of the subgoal. |
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*) |
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local |
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val move_thm = prove_goal MuckeSyn.thy "[| a = b ==> P a; a = b |] ==> P b" |
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(fn prems => [cut_facts_tac prems 1, dtac sym 1, hyp_subst_tac 1, |
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REPEAT (resolve_tac prems 1)]); |
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val sig_move_thm = #sign (rep_thm move_thm); |
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val bCterm = cterm_of sig_move_thm (valOf (search_var "b" (concl_of move_thm))); |
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val aCterm = cterm_of sig_move_thm (valOf (search_var "a" (hd(prems_of move_thm)))); |
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in |
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fun move_mus i state = |
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let val sign = #sign (rep_thm state); |
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val (subgoal::_) = Library.drop(i-1,prems_of state); |
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val concl = Logic.strip_imp_concl subgoal; (* recursive mu's in prems? *) |
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val redex = search_mu concl; |
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val idx = let val t = #maxidx (rep_thm state) in |
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if t < 0 then 1 else t+1 end; |
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in |
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case redex of |
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NONE => all_tac state | |
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SOME redexterm => |
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let val Credex = cterm_of sign redexterm; |
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val aiCterm = |
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cterm_of sig_move_thm (Logic.incr_indexes ([],idx) (term_of aCterm)); |
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val inst_move_thm = cterm_instantiate |
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[(bCterm,Credex),(aCterm,aiCterm)] move_thm; |
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in |
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((rtac inst_move_thm i) THEN (dtac eq_reflection i) |
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THEN (move_mus i)) state |
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end |
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end; (* outer let *) |
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end; (* local *) |
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(* Type of call_mucke_tac has changed: an argument t of type thy was inserted (TH); *) |
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(* Normally t can be user-instantiated by the value thy of the Isabelle context *) |
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fun call_mucke_tac i state = |
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let val sign = #sign (rep_thm state); |
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val (subgoal::_) = Library.drop(i-1,prems_of state); |
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val OraAss = invoke_oracle MuckeSyn.thy "Mucke" (sign,MuckeOracleExn (subgoal)); |
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in |
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(cut_facts_tac [OraAss] i) state |
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end; |
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(* transforming fun-defs into lambda-defs *) |
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val [eq] = goal CPure.thy "(!! x. f x == g x) ==> f == g"; |
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by (rtac (extensional eq) 1); |
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qed "ext_rl"; |
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infix cc; |
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fun NONE cc xl = xl |
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| (SOME x) cc xl = x::xl; |
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fun getargs ((x $ y) $ (Var ((z,_),_))) = getargs (x $ y) ^ " " ^z |
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| getargs (x $ (Var ((y,_),_))) = y; |
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fun getfun ((x $ y) $ z) = getfun (x $ y) |
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| getfun (x $ _) = x; |
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local |
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fun is_prefix [] s = true |
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| is_prefix (p::ps) [] = false |
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| is_prefix (p::ps) (x::xs) = (p=x) andalso (is_prefix ps xs); |
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fun delete_bold [] = [] |
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| delete_bold (x::xs) = if (is_prefix ("\^["::"["::"0"::"m"::[]) (x::xs)) |
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then (let val (_::_::_::s) = xs in delete_bold s end) |
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else (if (is_prefix ("\^["::"["::"1"::"m"::[]) (x::xs)) |
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then (let val (_::_::_::s) = xs in delete_bold s end) |
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else (x::delete_bold xs)); |
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fun delete_bold_string s = implode(delete_bold (explode s)); |
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in |
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(* extension with removing bold font (TH) *) |
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fun mk_lam_def (_::_) _ _ = NONE |
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| mk_lam_def [] ((Const("==",_) $ (Const _)) $ RHS) t = SOME t |
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| mk_lam_def [] ((Const("==",_) $ LHS) $ RHS) t = |
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let val tsig = #sign (rep_thm t); |
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val fnam = Sign.string_of_term tsig (getfun LHS); |
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val rhs = Sign.string_of_term tsig (freeze_thaw RHS) |
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val gl = delete_bold_string (fnam ^" == % " ^ (getargs LHS) ^" . " ^ rhs); |
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in |
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SOME (prove_goal (theory_of_sign tsig) gl (fn prems => |
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[(REPEAT (rtac ext_rl 1)), (rtac t 1) ])) |
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end |
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| mk_lam_def [] _ t= NONE; |
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fun mk_lam_defs ([]:thm list) = ([]: thm list) |
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| mk_lam_defs (t::l) = |
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(mk_lam_def (prems_of t) (concl_of t) t) cc (mk_lam_defs l); |
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end; |
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(* first simplification, then model checking *) |
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11025
a70b796d9af8
converted to Isar therory, adding attributes complete_split and split_format
oheimb
parents:
10212
diff
changeset
|
153 |
goalw (theory "Product_Type") [split_def] "(f::'a*'b=>'c) = (%(x, y). f (x, y))"; |
7322 | 154 |
by (rtac ext 1); |
6466
2eba94dc5951
added modelchecker mucke besides modelchecker eindhoven;
mueller
parents:
diff
changeset
|
155 |
by (stac (surjective_pairing RS sym) 1); |
7322 | 156 |
by (rtac refl 1); |
6466
2eba94dc5951
added modelchecker mucke besides modelchecker eindhoven;
mueller
parents:
diff
changeset
|
157 |
qed "pair_eta_expand"; |
2eba94dc5951
added modelchecker mucke besides modelchecker eindhoven;
mueller
parents:
diff
changeset
|
158 |
|
13462 | 159 |
val pair_eta_expand_proc = |
13480
bb72bd43c6c3
use Tactic.prove instead of prove_goalw_cterm in internal proofs!
wenzelm
parents:
13462
diff
changeset
|
160 |
Simplifier.simproc (Theory.sign_of (the_context ())) |
bb72bd43c6c3
use Tactic.prove instead of prove_goalw_cterm in internal proofs!
wenzelm
parents:
13462
diff
changeset
|
161 |
"pair_eta_expand" ["f::'a*'b=>'c"] |
bb72bd43c6c3
use Tactic.prove instead of prove_goalw_cterm in internal proofs!
wenzelm
parents:
13462
diff
changeset
|
162 |
(fn _ => fn _ => fn t => |
15531 | 163 |
case t of Abs _ => SOME (mk_meta_eq pair_eta_expand) |
164 |
| _ => NONE); |
|
6466
2eba94dc5951
added modelchecker mucke besides modelchecker eindhoven;
mueller
parents:
diff
changeset
|
165 |
|
7295 | 166 |
val Mucke_ss = simpset() addsimprocs [pair_eta_expand_proc] addsimps [Let_def]; |
6466
2eba94dc5951
added modelchecker mucke besides modelchecker eindhoven;
mueller
parents:
diff
changeset
|
167 |
|
7295 | 168 |
|
169 |
(* the interface *) |
|
6466
2eba94dc5951
added modelchecker mucke besides modelchecker eindhoven;
mueller
parents:
diff
changeset
|
170 |
|
7295 | 171 |
fun mc_mucke_tac defs i state = |
15570 | 172 |
(case Library.drop (i - 1, Thm.prems_of state) of |
16152 | 173 |
[] => no_tac state |
7295 | 174 |
| subgoal :: _ => |
175 |
EVERY [ |
|
176 |
REPEAT (etac thin_rl i), |
|
177 |
cut_facts_tac (mk_lam_defs defs) i, |
|
178 |
full_simp_tac (Mucke_ss delsimps [not_iff,split_part]) i, |
|
179 |
move_mus i, call_mucke_tac i,atac i, |
|
180 |
REPEAT (rtac refl i)] state); |
|
6466
2eba94dc5951
added modelchecker mucke besides modelchecker eindhoven;
mueller
parents:
diff
changeset
|
181 |
|
7295 | 182 |
(*check if user has mucke installed*) |
183 |
fun mucke_enabled () = getenv "MUCKE_HOME" <> ""; |
|
184 |
fun if_mucke_enabled f x = if mucke_enabled () then f x else (); |