mengj@17998
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(* ID: $Id$
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mengj@17998
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Author: Jia Meng, NICTA
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FOL clauses translated from HOL formulae. Combinators are used to represent lambda terms.
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*)
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structure ResHolClause =
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struct
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val include_combS = ref false;
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val include_min_comb = ref false;
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val const_typargs = ref (Library.K [] : (string*typ -> typ list));
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fun init thy = (include_combS:=false;include_min_comb:=false;const_typargs := Sign.const_typargs thy);
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(**********************************************************************)
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(* convert a Term.term with lambdas into a Term.term with combinators *)
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(**********************************************************************)
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fun is_free (Bound(a)) n = (a = n)
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| is_free (Abs(x,_,b)) n = (is_free b (n+1))
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| is_free (P $ Q) n = ((is_free P n) orelse (is_free Q n))
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| is_free _ _ = false;
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exception LAM2COMB of term;
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exception BND of term;
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fun decre_bndVar (Bound n) = Bound (n-1)
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| decre_bndVar (P $ Q) = (decre_bndVar P) $ (decre_bndVar Q)
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| decre_bndVar t =
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case t of Const(_,_) => t
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| Free(_,_) => t
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| Var(_,_) => t
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| Abs(_,_,_) => raise BND(t); (*should not occur*)
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(*******************************************)
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fun lam2comb (Abs(x,tp,Bound 0)) _ =
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let val tpI = Type("fun",[tp,tp])
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in
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include_min_comb:=true;
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Const("COMBI",tpI)
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end
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| lam2comb (Abs(x,tp,Bound n)) Bnds =
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let val (Bound n') = decre_bndVar (Bound n)
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val tb = List.nth(Bnds,n')
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val tK = Type("fun",[tb,Type("fun",[tp,tb])])
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in
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include_min_comb:=true;
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Const("COMBK",tK) $ (Bound n')
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end
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| lam2comb (Abs(x,t1,Const(c,t2))) _ =
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let val tK = Type("fun",[t2,Type("fun",[t1,t2])])
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in
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include_min_comb:=true;
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Const("COMBK",tK) $ Const(c,t2)
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end
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| lam2comb (Abs(x,t1,Free(v,t2))) _ =
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let val tK = Type("fun",[t2,Type("fun",[t1,t2])])
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in
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include_min_comb:=true;
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Const("COMBK",tK) $ Free(v,t2)
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end
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| lam2comb (Abs(x,t1,Var(ind,t2))) _=
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let val tK = Type("fun",[t2,Type("fun",[t1,t2])])
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in
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include_min_comb:=true;
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Const("COMBK",tK) $ Var(ind,t2)
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end
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| lam2comb (t as (Abs(x,t1,P$(Bound 0)))) Bnds =
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let val nfreeP = not(is_free P 0)
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val tr = Term.type_of1(t1::Bnds,P)
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in
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if nfreeP then (decre_bndVar P)
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else (
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let val tI = Type("fun",[t1,t1])
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val P' = lam2comb (Abs(x,t1,P)) Bnds
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val tp' = Term.type_of1(Bnds,P')
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val tS = Type("fun",[tp',Type("fun",[tI,tr])])
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in
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include_min_comb:=true;
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include_combS:=true;
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Const("COMBS",tS) $ P' $ Const("COMBI",tI)
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end)
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end
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| lam2comb (t as (Abs(x,t1,P$Q))) Bnds =
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let val (nfreeP,nfreeQ) = (not(is_free P 0),not(is_free Q 0))
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val tpq = Term.type_of1(t1::Bnds, P$Q)
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in
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if(nfreeP andalso nfreeQ) then (
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let val tK = Type("fun",[tpq,Type("fun",[t1,tpq])])
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val PQ' = decre_bndVar(P $ Q)
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in
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include_min_comb:=true;
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Const("COMBK",tK) $ PQ'
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end)
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else (
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if nfreeP then (
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let val Q' = lam2comb (Abs(x,t1,Q)) Bnds
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val P' = decre_bndVar P
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val tp = Term.type_of1(Bnds,P')
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val tq' = Term.type_of1(Bnds, Q')
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val tB = Type("fun",[tp,Type("fun",[tq',Type("fun",[t1,tpq])])])
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in
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include_min_comb:=true;
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Const("COMBB",tB) $ P' $ Q'
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end)
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else (
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if nfreeQ then (
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let val P' = lam2comb (Abs(x,t1,P)) Bnds
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val Q' = decre_bndVar Q
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val tq = Term.type_of1(Bnds,Q')
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val tp' = Term.type_of1(Bnds, P')
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val tC = Type("fun",[tp',Type("fun",[tq,Type("fun",[t1,tpq])])])
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in
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include_min_comb:=true;
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Const("COMBC",tC) $ P' $ Q'
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end)
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else(
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let val P' = lam2comb (Abs(x,t1,P)) Bnds
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val Q' = lam2comb (Abs(x,t1,Q)) Bnds
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val tp' = Term.type_of1(Bnds,P')
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val tq' = Term.type_of1(Bnds,Q')
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val tS = Type("fun",[tp',Type("fun",[tq',Type("fun",[t1,tpq])])])
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in
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include_min_comb:=true;
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include_combS:=true;
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Const("COMBS",tS) $ P' $ Q'
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end)))
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end
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| lam2comb (t as (Abs(x,t1,_))) _ = raise LAM2COMB (t);
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(*********************)
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fun to_comb (Abs(x,tp,b)) Bnds =
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let val b' = to_comb b (tp::Bnds)
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in lam2comb (Abs(x,tp,b')) Bnds end
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| to_comb (P $ Q) Bnds = ((to_comb P Bnds) $ (to_comb Q Bnds))
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| to_comb t _ = t;
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fun comb_of t = to_comb t [];
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(* print a term containing combinators, used for debugging *)
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exception TERM_COMB of term;
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fun string_of_term (Const(c,t)) = c
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| string_of_term (Free(v,t)) = v
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| string_of_term (Var((x,n),t)) =
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let val xn = x ^ "_" ^ (string_of_int n)
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in xn end
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| string_of_term (P $ Q) =
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let val P' = string_of_term P
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val Q' = string_of_term Q
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in
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"(" ^ P' ^ " " ^ Q' ^ ")" end
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| string_of_term t = raise TERM_COMB (t);
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(******************************************************)
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(* data types for typed combinator expressions *)
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(******************************************************)
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type axiom_name = string;
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datatype kind = Axiom | Conjecture;
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fun name_of_kind Axiom = "axiom"
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| name_of_kind Conjecture = "conjecture";
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type polarity = bool;
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type indexname = Term.indexname;
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type clause_id = int;
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type csort = Term.sort;
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type ctyp = ResClause.fol_type;
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val string_of_ctyp = ResClause.string_of_fol_type;
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type ctyp_var = ResClause.typ_var;
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type ctype_literal = ResClause.type_literal;
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datatype combterm = CombConst of string * ctyp * ctyp list
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| CombFree of string * ctyp
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| CombVar of string * ctyp
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| CombApp of combterm * combterm * ctyp
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| Bool of combterm
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| Equal of combterm * combterm;
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datatype literal = Literal of polarity * combterm;
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datatype clause =
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Clause of {clause_id: clause_id,
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axiom_name: axiom_name,
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kind: kind,
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literals: literal list,
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ctypes_sorts: (ctyp_var * csort) list,
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ctvar_type_literals: ctype_literal list,
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ctfree_type_literals: ctype_literal list};
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fun string_of_kind (Clause cls) = name_of_kind (#kind cls);
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fun get_axiomName (Clause cls) = #axiom_name cls;
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fun get_clause_id (Clause cls) = #clause_id cls;
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fun get_literals (c as Clause(cls)) = #literals cls;
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exception TERM_ORD of string
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fun term_ord (CombVar(_,_),CombVar(_,_)) = EQUAL
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| term_ord (CombVar(_,_),_) = LESS
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| term_ord (CombFree(_,_),CombVar(_,_)) = GREATER
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| term_ord (CombFree(f1,tp1),CombFree(f2,tp2)) =
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let val ord1 = string_ord(f1,f2)
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in
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case ord1 of EQUAL => ResClause.types_ord ([tp1],[tp2])
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| _ => ord1
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end
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| term_ord (CombFree(_,_),_) = LESS
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| term_ord (CombConst(_,_,_),CombVar(_,_)) = GREATER
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| term_ord (CombConst(_,_,_),CombFree(_,_)) = GREATER
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| term_ord (CombConst(c1,tp1,_),CombConst(c2,tp2,_)) =
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let val ord1 = string_ord (c1,c2)
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in
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case ord1 of EQUAL => ResClause.types_ord ([tp1],[tp2])
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| _ => ord1
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end
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| term_ord (CombConst(_,_,_),_) = LESS
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| term_ord (CombApp(_,_,_),Bool(_)) = raise TERM_ORD("bool")
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| term_ord (CombApp(_,_,_),Equal(_,_)) = LESS
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| term_ord (CombApp(f1,arg1,tp1),CombApp(f2,arg2,tp2)) =
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let val ord1 = term_ord (f1,f2)
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val ord2 = case ord1 of EQUAL => term_ord (arg1,arg2)
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| _ => ord1
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in
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case ord2 of EQUAL => ResClause.types_ord ([tp1],[tp2])
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| _ => ord2
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end
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| term_ord (CombApp(_,_,_),_) = GREATER
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| term_ord (Bool(_),_) = raise TERM_ORD("bool")
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| term_ord (Equal(t1,t2),Equal(t3,t4)) = ResClause.list_ord term_ord ([t1,t2],[t3,t4])
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| term_ord (Equal(_,_),_) = GREATER;
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fun predicate_ord (Equal(_,_),Bool(_)) = LESS
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| predicate_ord (Equal(t1,t2),Equal(t3,t4)) =
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ResClause.list_ord term_ord ([t1,t2],[t3,t4])
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| predicate_ord (Bool(_),Equal(_,_)) = GREATER
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| predicate_ord (Bool(t1),Bool(t2)) = term_ord (t1,t2)
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fun literal_ord (Literal(false,_),Literal(true,_)) = LESS
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| literal_ord (Literal(true,_),Literal(false,_)) = GREATER
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| literal_ord (Literal(_,pred1),Literal(_,pred2)) = predicate_ord(pred1,pred2);
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fun sort_lits lits = sort literal_ord lits;
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(*********************************************************************)
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|
274 |
(* convert a clause with type Term.term to a clause with type clause *)
|
mengj@17998
|
275 |
(*********************************************************************)
|
mengj@17998
|
276 |
|
mengj@18356
|
277 |
fun isFalse (Literal(pol,Bool(CombConst(c,_,_)))) =
|
mengj@17998
|
278 |
(pol andalso c = "c_False") orelse
|
mengj@17998
|
279 |
(not pol andalso c = "c_True")
|
mengj@17998
|
280 |
| isFalse _ = false;
|
mengj@17998
|
281 |
|
mengj@17998
|
282 |
|
mengj@18356
|
283 |
fun isTrue (Literal (pol,Bool(CombConst(c,_,_)))) =
|
mengj@17998
|
284 |
(pol andalso c = "c_True") orelse
|
mengj@17998
|
285 |
(not pol andalso c = "c_False")
|
mengj@17998
|
286 |
| isTrue _ = false;
|
mengj@17998
|
287 |
|
mengj@17998
|
288 |
fun isTaut (Clause {literals,...}) = exists isTrue literals;
|
mengj@17998
|
289 |
|
mengj@17998
|
290 |
|
mengj@17998
|
291 |
|
mengj@17998
|
292 |
fun make_clause(clause_id,axiom_name,kind,literals,ctypes_sorts,ctvar_type_literals,ctfree_type_literals) =
|
mengj@17998
|
293 |
if forall isFalse literals
|
mengj@17998
|
294 |
then error "Problem too trivial for resolution (empty clause)"
|
mengj@17998
|
295 |
else
|
mengj@17998
|
296 |
Clause {clause_id = clause_id, axiom_name = axiom_name, kind = kind,
|
mengj@17998
|
297 |
literals = literals, ctypes_sorts = ctypes_sorts,
|
mengj@17998
|
298 |
ctvar_type_literals = ctvar_type_literals,
|
mengj@17998
|
299 |
ctfree_type_literals = ctfree_type_literals};
|
mengj@17998
|
300 |
|
mengj@18440
|
301 |
fun type_of (Type (a, Ts)) =
|
mengj@18440
|
302 |
let val (folTypes,ts) = types_of Ts
|
mengj@17998
|
303 |
val t = ResClause.make_fixed_type_const a
|
mengj@17998
|
304 |
in
|
mengj@18440
|
305 |
(ResClause.mk_fol_type("Comp",t,folTypes),ts)
|
mengj@17998
|
306 |
end
|
mengj@18440
|
307 |
| type_of (tp as (TFree(a,s))) =
|
mengj@18440
|
308 |
let val t = ResClause.make_fixed_type_var a
|
mengj@18440
|
309 |
in
|
mengj@18440
|
310 |
(ResClause.mk_fol_type("Fixed",t,[]),[ResClause.mk_typ_var_sort tp])
|
mengj@18440
|
311 |
end
|
mengj@18440
|
312 |
| type_of (tp as (TVar(v,s))) =
|
mengj@18440
|
313 |
let val t = ResClause.make_schematic_type_var v
|
mengj@18440
|
314 |
in
|
mengj@18440
|
315 |
(ResClause.mk_fol_type("Var",t,[]),[ResClause.mk_typ_var_sort tp])
|
mengj@18440
|
316 |
end
|
mengj@18356
|
317 |
|
mengj@18440
|
318 |
and types_of Ts =
|
mengj@18440
|
319 |
let val foltyps_ts = map type_of Ts
|
mengj@18440
|
320 |
val (folTyps,ts) = ListPair.unzip foltyps_ts
|
mengj@18440
|
321 |
in
|
mengj@18440
|
322 |
(folTyps,ResClause.union_all ts)
|
mengj@18440
|
323 |
end;
|
mengj@17998
|
324 |
|
mengj@17998
|
325 |
(* same as above, but no gathering of sort information *)
|
mengj@18440
|
326 |
fun simp_type_of (Type (a, Ts)) =
|
mengj@18356
|
327 |
let val typs = map simp_type_of Ts
|
mengj@17998
|
328 |
val t = ResClause.make_fixed_type_const a
|
mengj@17998
|
329 |
in
|
mengj@18440
|
330 |
ResClause.mk_fol_type("Comp",t,typs)
|
mengj@17998
|
331 |
end
|
mengj@18440
|
332 |
| simp_type_of (TFree (a,s)) = ResClause.mk_fol_type("Fixed",ResClause.make_fixed_type_var a,[])
|
mengj@18440
|
333 |
| simp_type_of (TVar (v,s)) = ResClause.mk_fol_type("Var",ResClause.make_schematic_type_var v,[]);
|
mengj@18440
|
334 |
|
mengj@18356
|
335 |
fun comb_typ ("COMBI",t) =
|
mengj@18356
|
336 |
let val t' = domain_type t
|
mengj@18356
|
337 |
in
|
mengj@18356
|
338 |
[simp_type_of t']
|
mengj@18356
|
339 |
end
|
mengj@18356
|
340 |
| comb_typ ("COMBK",t) =
|
mengj@18725
|
341 |
let val a = domain_type t
|
mengj@18725
|
342 |
val b = domain_type (range_type t)
|
mengj@18356
|
343 |
in
|
mengj@18725
|
344 |
map simp_type_of [a,b]
|
mengj@18356
|
345 |
end
|
mengj@18356
|
346 |
| comb_typ ("COMBS",t) =
|
mengj@18356
|
347 |
let val t' = domain_type t
|
mengj@18725
|
348 |
val a = domain_type t'
|
mengj@18725
|
349 |
val b = domain_type (range_type t')
|
mengj@18725
|
350 |
val c = range_type (range_type t')
|
mengj@18356
|
351 |
in
|
mengj@18356
|
352 |
map simp_type_of [a,b,c]
|
mengj@18356
|
353 |
end
|
mengj@18356
|
354 |
| comb_typ ("COMBB",t) =
|
mengj@18725
|
355 |
let val ab = domain_type t
|
mengj@18725
|
356 |
val ca = domain_type (range_type t)
|
mengj@18356
|
357 |
val a = domain_type ab
|
mengj@18725
|
358 |
val b = range_type ab
|
mengj@18725
|
359 |
val c = domain_type ca
|
mengj@18356
|
360 |
in
|
mengj@18356
|
361 |
map simp_type_of [a,b,c]
|
mengj@18356
|
362 |
end
|
mengj@18356
|
363 |
| comb_typ ("COMBC",t) =
|
mengj@18356
|
364 |
let val t1 = domain_type t
|
mengj@18725
|
365 |
val a = domain_type t1
|
mengj@18725
|
366 |
val b = domain_type (range_type t1)
|
mengj@18725
|
367 |
val c = range_type (range_type t1)
|
mengj@18356
|
368 |
in
|
mengj@18356
|
369 |
map simp_type_of [a,b,c]
|
mengj@18356
|
370 |
end;
|
mengj@18356
|
371 |
|
mengj@18356
|
372 |
fun const_type_of ("COMBI",t) =
|
mengj@18356
|
373 |
let val (tp,ts) = type_of t
|
mengj@18356
|
374 |
val I_var = comb_typ ("COMBI",t)
|
mengj@18356
|
375 |
in
|
mengj@18356
|
376 |
(tp,ts,I_var)
|
mengj@18356
|
377 |
end
|
mengj@18356
|
378 |
| const_type_of ("COMBK",t) =
|
mengj@18356
|
379 |
let val (tp,ts) = type_of t
|
mengj@18356
|
380 |
val K_var = comb_typ ("COMBK",t)
|
mengj@18356
|
381 |
in
|
mengj@18356
|
382 |
(tp,ts,K_var)
|
mengj@18356
|
383 |
end
|
mengj@18356
|
384 |
| const_type_of ("COMBS",t) =
|
mengj@18356
|
385 |
let val (tp,ts) = type_of t
|
mengj@18356
|
386 |
val S_var = comb_typ ("COMBS",t)
|
mengj@18356
|
387 |
in
|
mengj@18356
|
388 |
(tp,ts,S_var)
|
mengj@18356
|
389 |
end
|
mengj@18356
|
390 |
| const_type_of ("COMBB",t) =
|
mengj@18356
|
391 |
let val (tp,ts) = type_of t
|
mengj@18356
|
392 |
val B_var = comb_typ ("COMBB",t)
|
mengj@18356
|
393 |
in
|
mengj@18356
|
394 |
(tp,ts,B_var)
|
mengj@18356
|
395 |
end
|
mengj@18356
|
396 |
| const_type_of ("COMBC",t) =
|
mengj@18356
|
397 |
let val (tp,ts) = type_of t
|
mengj@18356
|
398 |
val C_var = comb_typ ("COMBC",t)
|
mengj@18356
|
399 |
in
|
mengj@18356
|
400 |
(tp,ts,C_var)
|
mengj@18356
|
401 |
end
|
mengj@18356
|
402 |
| const_type_of (c,t) =
|
mengj@18356
|
403 |
let val (tp,ts) = type_of t
|
mengj@18356
|
404 |
val tvars = !const_typargs(c,t)
|
mengj@18356
|
405 |
val tvars' = map simp_type_of tvars
|
mengj@18356
|
406 |
in
|
mengj@18356
|
407 |
(tp,ts,tvars')
|
mengj@18356
|
408 |
end;
|
mengj@18356
|
409 |
|
mengj@18356
|
410 |
fun is_bool_type (Type("bool",[])) = true
|
mengj@18356
|
411 |
| is_bool_type _ = false;
|
mengj@17998
|
412 |
|
mengj@17998
|
413 |
|
mengj@17998
|
414 |
(* convert a Term.term (with combinators) into a combterm, also accummulate sort info *)
|
mengj@17998
|
415 |
fun combterm_of (Const(c,t)) =
|
mengj@18356
|
416 |
let val (tp,ts,tvar_list) = const_type_of (c,t)
|
mengj@18356
|
417 |
val is_bool = is_bool_type t
|
mengj@18356
|
418 |
val c' = CombConst(ResClause.make_fixed_const c,tp,tvar_list)
|
mengj@17998
|
419 |
val c'' = if is_bool then Bool(c') else c'
|
mengj@17998
|
420 |
in
|
mengj@17998
|
421 |
(c'',ts)
|
mengj@17998
|
422 |
end
|
mengj@17998
|
423 |
| combterm_of (Free(v,t)) =
|
mengj@18356
|
424 |
let val (tp,ts) = type_of t
|
mengj@18356
|
425 |
val is_bool = is_bool_type t
|
mengj@17998
|
426 |
val v' = if ResClause.isMeta v then CombVar(ResClause.make_schematic_var(v,0),tp)
|
mengj@17998
|
427 |
else CombFree(ResClause.make_fixed_var v,tp)
|
mengj@17998
|
428 |
val v'' = if is_bool then Bool(v') else v'
|
mengj@17998
|
429 |
in
|
mengj@17998
|
430 |
(v'',ts)
|
mengj@17998
|
431 |
end
|
mengj@17998
|
432 |
| combterm_of (Var(v,t)) =
|
mengj@18356
|
433 |
let val (tp,ts) = type_of t
|
mengj@18356
|
434 |
val is_bool = is_bool_type t
|
mengj@17998
|
435 |
val v' = CombVar(ResClause.make_schematic_var v,tp)
|
mengj@17998
|
436 |
val v'' = if is_bool then Bool(v') else v'
|
mengj@17998
|
437 |
in
|
mengj@17998
|
438 |
(v'',ts)
|
mengj@17998
|
439 |
end
|
mengj@17998
|
440 |
| combterm_of (Const("op =",T) $ P $ Q) = (*FIXME: allow equal between bools?*)
|
mengj@17998
|
441 |
let val (P',tsP) = combterm_of P
|
mengj@17998
|
442 |
val (Q',tsQ) = combterm_of Q
|
mengj@17998
|
443 |
in
|
mengj@17998
|
444 |
(Equal(P',Q'),tsP union tsQ)
|
mengj@17998
|
445 |
end
|
mengj@17998
|
446 |
| combterm_of (t as (P $ Q)) =
|
mengj@17998
|
447 |
let val (P',tsP) = combterm_of P
|
mengj@17998
|
448 |
val (Q',tsQ) = combterm_of Q
|
mengj@17998
|
449 |
val tp = Term.type_of t
|
mengj@18356
|
450 |
val tp' = simp_type_of tp
|
mengj@18356
|
451 |
val is_bool = is_bool_type tp
|
mengj@17998
|
452 |
val t' = CombApp(P',Q',tp')
|
mengj@17998
|
453 |
val t'' = if is_bool then Bool(t') else t'
|
mengj@17998
|
454 |
in
|
mengj@17998
|
455 |
(t'',tsP union tsQ)
|
mengj@17998
|
456 |
end;
|
mengj@17998
|
457 |
|
mengj@17998
|
458 |
fun predicate_of ((Const("Not",_) $ P), polarity) =
|
mengj@17998
|
459 |
predicate_of (P, not polarity)
|
mengj@17998
|
460 |
| predicate_of (term,polarity) = (combterm_of term,polarity);
|
mengj@17998
|
461 |
|
mengj@17998
|
462 |
|
mengj@17998
|
463 |
fun literals_of_term1 args (Const("Trueprop",_) $ P) = literals_of_term1 args P
|
mengj@17998
|
464 |
| literals_of_term1 args (Const("op |",_) $ P $ Q) =
|
mengj@17998
|
465 |
let val args' = literals_of_term1 args P
|
mengj@17998
|
466 |
in
|
mengj@17998
|
467 |
literals_of_term1 args' Q
|
mengj@17998
|
468 |
end
|
mengj@17998
|
469 |
| literals_of_term1 (lits,ts) P =
|
mengj@17998
|
470 |
let val ((pred,ts'),pol) = predicate_of (P,true)
|
mengj@17998
|
471 |
val lits' = Literal(pol,pred)::lits
|
mengj@17998
|
472 |
in
|
mengj@17998
|
473 |
(lits',ts union ts')
|
mengj@17998
|
474 |
end;
|
mengj@17998
|
475 |
|
mengj@17998
|
476 |
|
mengj@17998
|
477 |
fun literals_of_term P = literals_of_term1 ([],[]) P;
|
mengj@17998
|
478 |
|
mengj@17998
|
479 |
|
mengj@17998
|
480 |
(* making axiom and conjecture clauses *)
|
mengj@19444
|
481 |
fun make_axiom_clause thm (ax_name,cls_id) =
|
mengj@19444
|
482 |
let val term = prop_of thm
|
mengj@19444
|
483 |
val term' = comb_of term
|
mengj@17998
|
484 |
val (lits,ctypes_sorts) = literals_of_term term'
|
mengj@18440
|
485 |
val lits' = sort_lits lits
|
paulson@18856
|
486 |
val (ctvar_lits,ctfree_lits) = ResClause.add_typs_aux ctypes_sorts
|
mengj@17998
|
487 |
in
|
mengj@17998
|
488 |
make_clause(cls_id,ax_name,Axiom,
|
mengj@18440
|
489 |
lits',ctypes_sorts,ctvar_lits,ctfree_lits)
|
mengj@17998
|
490 |
end;
|
mengj@17998
|
491 |
|
mengj@19444
|
492 |
fun make_axiom_clauses [] = []
|
mengj@19444
|
493 |
| make_axiom_clauses ((thm,(name,id))::thms) =
|
mengj@19444
|
494 |
let val cls = make_axiom_clause thm (name,id)
|
mengj@19444
|
495 |
val clss = make_axiom_clauses thms
|
mengj@19198
|
496 |
in
|
mengj@19198
|
497 |
if isTaut cls then clss else (cls::clss)
|
mengj@19198
|
498 |
end;
|
mengj@17998
|
499 |
|
mengj@19354
|
500 |
|
mengj@19444
|
501 |
fun make_conjecture_clause n thm =
|
mengj@19444
|
502 |
let val t = prop_of thm
|
mengj@19444
|
503 |
val t' = comb_of t
|
mengj@17998
|
504 |
val (lits,ctypes_sorts) = literals_of_term t'
|
paulson@18856
|
505 |
val (ctvar_lits,ctfree_lits) = ResClause.add_typs_aux ctypes_sorts
|
mengj@17998
|
506 |
in
|
mengj@17998
|
507 |
make_clause(n,"conjecture",Conjecture,lits,ctypes_sorts,ctvar_lits,ctfree_lits)
|
mengj@17998
|
508 |
end;
|
mengj@17998
|
509 |
|
mengj@17998
|
510 |
|
mengj@17998
|
511 |
|
mengj@17998
|
512 |
fun make_conjecture_clauses_aux _ [] = []
|
mengj@17998
|
513 |
| make_conjecture_clauses_aux n (t::ts) =
|
mengj@17998
|
514 |
make_conjecture_clause n t :: make_conjecture_clauses_aux (n+1) ts;
|
mengj@17998
|
515 |
|
mengj@17998
|
516 |
val make_conjecture_clauses = make_conjecture_clauses_aux 0;
|
mengj@17998
|
517 |
|
mengj@17998
|
518 |
|
mengj@17998
|
519 |
(**********************************************************************)
|
mengj@17998
|
520 |
(* convert clause into ATP specific formats: *)
|
mengj@17998
|
521 |
(* TPTP used by Vampire and E *)
|
mengj@17998
|
522 |
(**********************************************************************)
|
mengj@17998
|
523 |
|
mengj@17998
|
524 |
val type_wrapper = "typeinfo";
|
mengj@17998
|
525 |
|
mengj@18356
|
526 |
datatype type_level = T_FULL | T_PARTIAL | T_CONST | T_NONE;
|
mengj@17998
|
527 |
|
mengj@19130
|
528 |
val typ_level = ref T_FULL;
|
mengj@18356
|
529 |
|
mengj@18356
|
530 |
fun full_types () = (typ_level:=T_FULL);
|
mengj@18356
|
531 |
fun partial_types () = (typ_level:=T_PARTIAL);
|
mengj@18356
|
532 |
fun const_types_only () = (typ_level:=T_CONST);
|
mengj@18356
|
533 |
fun no_types () = (typ_level:=T_NONE);
|
mengj@18356
|
534 |
|
mengj@18356
|
535 |
|
mengj@18356
|
536 |
fun find_typ_level () = !typ_level;
|
mengj@18356
|
537 |
|
mengj@18356
|
538 |
fun wrap_type (c,t) =
|
mengj@18356
|
539 |
case !typ_level of T_FULL => type_wrapper ^ (ResClause.paren_pack [c,t])
|
mengj@18356
|
540 |
| _ => c;
|
mengj@18356
|
541 |
|
mengj@17998
|
542 |
|
mengj@17998
|
543 |
val bool_tp = ResClause.make_fixed_type_const "bool";
|
mengj@17998
|
544 |
|
mengj@17998
|
545 |
val app_str = "hAPP";
|
mengj@17998
|
546 |
|
mengj@17998
|
547 |
val bool_str = "hBOOL";
|
mengj@17998
|
548 |
|
mengj@18356
|
549 |
exception STRING_OF_COMBTERM of int;
|
mengj@17998
|
550 |
|
mengj@17998
|
551 |
(* convert literals of clauses into strings *)
|
mengj@18440
|
552 |
fun string_of_combterm1_aux _ (CombConst(c,tp,_)) =
|
mengj@18440
|
553 |
let val tp' = string_of_ctyp tp
|
mengj@18440
|
554 |
in
|
mengj@18440
|
555 |
(wrap_type (c,tp'),tp')
|
mengj@18440
|
556 |
end
|
mengj@18440
|
557 |
| string_of_combterm1_aux _ (CombFree(v,tp)) =
|
mengj@18440
|
558 |
let val tp' = string_of_ctyp tp
|
mengj@18440
|
559 |
in
|
mengj@18440
|
560 |
(wrap_type (v,tp'),tp')
|
mengj@18440
|
561 |
end
|
mengj@18440
|
562 |
| string_of_combterm1_aux _ (CombVar(v,tp)) =
|
mengj@18440
|
563 |
let val tp' = string_of_ctyp tp
|
mengj@18440
|
564 |
in
|
mengj@18440
|
565 |
(wrap_type (v,tp'),tp')
|
mengj@18440
|
566 |
end
|
mengj@18356
|
567 |
| string_of_combterm1_aux is_pred (CombApp(t1,t2,tp)) =
|
mengj@18356
|
568 |
let val (s1,tp1) = string_of_combterm1_aux is_pred t1
|
mengj@18356
|
569 |
val (s2,tp2) = string_of_combterm1_aux is_pred t2
|
mengj@18440
|
570 |
val tp' = ResClause.string_of_fol_type tp
|
mengj@18440
|
571 |
val r = case !typ_level of T_FULL => type_wrapper ^ (ResClause.paren_pack [(app_str ^ (ResClause.paren_pack [s1,s2])),tp'])
|
mengj@18356
|
572 |
| T_PARTIAL => app_str ^ (ResClause.paren_pack [s1,s2,tp1])
|
mengj@18356
|
573 |
| T_NONE => app_str ^ (ResClause.paren_pack [s1,s2])
|
mengj@18356
|
574 |
| T_CONST => raise STRING_OF_COMBTERM (1) (*should not happen, if happened may be a bug*)
|
mengj@18440
|
575 |
in (r,tp')
|
mengj@18356
|
576 |
|
mengj@17998
|
577 |
end
|
mengj@18356
|
578 |
| string_of_combterm1_aux is_pred (Bool(t)) =
|
mengj@18356
|
579 |
let val (t',_) = string_of_combterm1_aux false t
|
mengj@18356
|
580 |
val r = if is_pred then bool_str ^ (ResClause.paren_pack [t'])
|
mengj@18356
|
581 |
else t'
|
mengj@18356
|
582 |
in
|
mengj@18356
|
583 |
(r,bool_tp)
|
mengj@18356
|
584 |
end
|
mengj@18356
|
585 |
| string_of_combterm1_aux _ (Equal(t1,t2)) =
|
mengj@18356
|
586 |
let val (s1,_) = string_of_combterm1_aux false t1
|
mengj@18356
|
587 |
val (s2,_) = string_of_combterm1_aux false t2
|
mengj@18356
|
588 |
in
|
mengj@18356
|
589 |
("equal" ^ (ResClause.paren_pack [s1,s2]),bool_tp)
|
mengj@18356
|
590 |
end;
|
mengj@18356
|
591 |
|
mengj@18356
|
592 |
fun string_of_combterm1 is_pred term = fst (string_of_combterm1_aux is_pred term);
|
mengj@18356
|
593 |
|
mengj@18440
|
594 |
fun string_of_combterm2 _ (CombConst(c,tp,tvars)) =
|
mengj@18440
|
595 |
let val tvars' = map string_of_ctyp tvars
|
mengj@18440
|
596 |
in
|
mengj@18440
|
597 |
c ^ (ResClause.paren_pack tvars')
|
mengj@18440
|
598 |
end
|
mengj@18356
|
599 |
| string_of_combterm2 _ (CombFree(v,tp)) = v
|
mengj@18356
|
600 |
| string_of_combterm2 _ (CombVar(v,tp)) = v
|
mengj@18356
|
601 |
| string_of_combterm2 is_pred (CombApp(t1,t2,tp)) =
|
mengj@18356
|
602 |
let val s1 = string_of_combterm2 is_pred t1
|
mengj@18356
|
603 |
val s2 = string_of_combterm2 is_pred t2
|
mengj@18356
|
604 |
in
|
mengj@18356
|
605 |
app_str ^ (ResClause.paren_pack [s1,s2])
|
mengj@18356
|
606 |
end
|
mengj@18356
|
607 |
| string_of_combterm2 is_pred (Bool(t)) =
|
mengj@18356
|
608 |
let val t' = string_of_combterm2 false t
|
mengj@17998
|
609 |
in
|
mengj@18200
|
610 |
if is_pred then bool_str ^ (ResClause.paren_pack [t'])
|
mengj@18200
|
611 |
else t'
|
mengj@17998
|
612 |
end
|
mengj@18356
|
613 |
| string_of_combterm2 _ (Equal(t1,t2)) =
|
mengj@18356
|
614 |
let val s1 = string_of_combterm2 false t1
|
mengj@18356
|
615 |
val s2 = string_of_combterm2 false t2
|
mengj@17998
|
616 |
in
|
mengj@18356
|
617 |
("equal" ^ (ResClause.paren_pack [s1,s2]))
|
mengj@17998
|
618 |
end;
|
mengj@17998
|
619 |
|
mengj@18356
|
620 |
|
mengj@18356
|
621 |
|
mengj@18356
|
622 |
fun string_of_combterm is_pred term =
|
mengj@18356
|
623 |
case !typ_level of T_CONST => string_of_combterm2 is_pred term
|
mengj@18356
|
624 |
| _ => string_of_combterm1 is_pred term;
|
mengj@18356
|
625 |
|
mengj@18356
|
626 |
|
mengj@17998
|
627 |
fun string_of_clausename (cls_id,ax_name) =
|
mengj@17998
|
628 |
ResClause.clause_prefix ^ ResClause.ascii_of ax_name ^ "_" ^ Int.toString cls_id;
|
mengj@17998
|
629 |
|
mengj@17998
|
630 |
fun string_of_type_clsname (cls_id,ax_name,idx) =
|
mengj@17998
|
631 |
string_of_clausename (cls_id,ax_name) ^ "_tcs" ^ (Int.toString idx);
|
mengj@17998
|
632 |
|
mengj@17998
|
633 |
|
mengj@17998
|
634 |
fun tptp_literal (Literal(pol,pred)) =
|
mengj@18200
|
635 |
let val pred_string = string_of_combterm true pred
|
mengj@17998
|
636 |
val pol_str = if pol then "++" else "--"
|
mengj@17998
|
637 |
in
|
mengj@17998
|
638 |
pol_str ^ pred_string
|
mengj@17998
|
639 |
end;
|
mengj@17998
|
640 |
|
mengj@17998
|
641 |
|
mengj@17998
|
642 |
fun tptp_type_lits (Clause cls) =
|
mengj@17998
|
643 |
let val lits = map tptp_literal (#literals cls)
|
mengj@17998
|
644 |
val ctvar_lits_strs =
|
mengj@18356
|
645 |
case !typ_level of T_NONE => []
|
mengj@18356
|
646 |
| _ => (map ResClause.tptp_of_typeLit (#ctvar_type_literals cls))
|
mengj@17998
|
647 |
val ctfree_lits =
|
mengj@18356
|
648 |
case !typ_level of T_NONE => []
|
mengj@18356
|
649 |
| _ => (map ResClause.tptp_of_typeLit (#ctfree_type_literals cls))
|
mengj@17998
|
650 |
in
|
mengj@17998
|
651 |
(ctvar_lits_strs @ lits, ctfree_lits)
|
mengj@17998
|
652 |
end;
|
mengj@18356
|
653 |
|
mengj@18356
|
654 |
|
mengj@17998
|
655 |
fun clause2tptp cls =
|
mengj@17998
|
656 |
let val (lits,ctfree_lits) = tptp_type_lits cls
|
mengj@17998
|
657 |
val cls_id = get_clause_id cls
|
mengj@17998
|
658 |
val ax_name = get_axiomName cls
|
mengj@17998
|
659 |
val knd = string_of_kind cls
|
mengj@17998
|
660 |
val lits_str = ResClause.bracket_pack lits
|
mengj@17998
|
661 |
val cls_str = ResClause.gen_tptp_cls(cls_id,ax_name,knd,lits_str)
|
mengj@17998
|
662 |
in
|
mengj@17998
|
663 |
(cls_str,ctfree_lits)
|
mengj@17998
|
664 |
end;
|
mengj@17998
|
665 |
|
mengj@17998
|
666 |
|
mengj@18440
|
667 |
|
mengj@18440
|
668 |
(**********************************************************************)
|
mengj@18440
|
669 |
(* clause equalities and hashing functions *)
|
mengj@18440
|
670 |
(**********************************************************************)
|
mengj@18440
|
671 |
|
mengj@18440
|
672 |
|
mengj@18440
|
673 |
fun combterm_eq (CombConst(c1,tp1,tps1),CombConst(c2,tp2,tps2)) vtvars =
|
mengj@18440
|
674 |
let val (eq1,vtvars1) = if c1 = c2 then ResClause.types_eq (tps1,tps2) vtvars
|
mengj@18440
|
675 |
else (false,vtvars)
|
mengj@18440
|
676 |
in
|
mengj@18440
|
677 |
(eq1,vtvars1)
|
mengj@18440
|
678 |
end
|
mengj@18440
|
679 |
| combterm_eq (CombConst(_,_,_),_) vtvars = (false,vtvars)
|
mengj@18440
|
680 |
| combterm_eq (CombFree(a1,tp1),CombFree(a2,tp2)) vtvars =
|
mengj@18440
|
681 |
if a1 = a2 then ResClause.types_eq ([tp1],[tp2]) vtvars
|
mengj@18440
|
682 |
else (false,vtvars)
|
mengj@18440
|
683 |
| combterm_eq (CombFree(_,_),_) vtvars = (false,vtvars)
|
mengj@18440
|
684 |
| combterm_eq (CombVar(v1,tp1),CombVar(v2,tp2)) (vars,tvars) =
|
mengj@18440
|
685 |
(case ResClause.check_var_pairs(v1,v2) vars of 0 => ResClause.types_eq ([tp1],[tp2]) ((v1,v2)::vars,tvars)
|
mengj@18440
|
686 |
| 1 => ResClause.types_eq ([tp1],[tp2]) (vars,tvars)
|
mengj@18440
|
687 |
| 2 => (false,(vars,tvars)))
|
mengj@18440
|
688 |
| combterm_eq (CombVar(_,_),_) vtvars = (false,vtvars)
|
mengj@18440
|
689 |
| combterm_eq (CombApp(f1,arg1,tp1),CombApp(f2,arg2,tp2)) vtvars =
|
mengj@18440
|
690 |
let val (eq1,vtvars1) = combterm_eq (f1,f2) vtvars
|
mengj@18440
|
691 |
val (eq2,vtvars2) = if eq1 then combterm_eq (arg1,arg2) vtvars1
|
mengj@18440
|
692 |
else (eq1,vtvars1)
|
mengj@18440
|
693 |
in
|
mengj@18440
|
694 |
if eq2 then ResClause.types_eq ([tp1],[tp2]) vtvars2
|
mengj@18440
|
695 |
else (eq2,vtvars2)
|
mengj@18440
|
696 |
end
|
mengj@18440
|
697 |
| combterm_eq (CombApp(_,_,_),_) vtvars = (false,vtvars)
|
mengj@18440
|
698 |
| combterm_eq (Bool(t1),Bool(t2)) vtvars = combterm_eq (t1,t2) vtvars
|
mengj@18440
|
699 |
| combterm_eq (Bool(_),_) vtvars = (false,vtvars)
|
mengj@18440
|
700 |
| combterm_eq (Equal(t1,t2),Equal(t3,t4)) vtvars =
|
mengj@18440
|
701 |
let val (eq1,vtvars1) = combterm_eq (t1,t3) vtvars
|
mengj@18440
|
702 |
in
|
mengj@18440
|
703 |
if eq1 then combterm_eq (t2,t4) vtvars1
|
mengj@18440
|
704 |
else (eq1,vtvars1)
|
mengj@18440
|
705 |
end
|
mengj@18440
|
706 |
| combterm_eq (Equal(t1,t2),_) vtvars = (false,vtvars);
|
mengj@18440
|
707 |
|
mengj@18440
|
708 |
fun lit_eq (Literal(pol1,pred1),Literal(pol2,pred2)) vtvars =
|
mengj@18440
|
709 |
if (pol1 = pol2) then combterm_eq (pred1,pred2) vtvars
|
mengj@18440
|
710 |
else (false,vtvars);
|
mengj@18440
|
711 |
|
mengj@18440
|
712 |
fun lits_eq ([],[]) vtvars = (true,vtvars)
|
mengj@18440
|
713 |
| lits_eq (l1::ls1,l2::ls2) vtvars =
|
mengj@18440
|
714 |
let val (eq1,vtvars1) = lit_eq (l1,l2) vtvars
|
mengj@18440
|
715 |
in
|
mengj@18440
|
716 |
if eq1 then lits_eq (ls1,ls2) vtvars1
|
mengj@18440
|
717 |
else (false,vtvars1)
|
mengj@18440
|
718 |
end;
|
mengj@18440
|
719 |
|
mengj@18440
|
720 |
fun clause_eq (cls1,cls2) =
|
mengj@18440
|
721 |
let val lits1 = get_literals cls1
|
mengj@18440
|
722 |
val lits2 = get_literals cls2
|
mengj@18440
|
723 |
in
|
mengj@18440
|
724 |
length lits1 = length lits2 andalso #1 (lits_eq (lits1,lits2) ([],[]))
|
mengj@18440
|
725 |
end;
|
mengj@18440
|
726 |
|
mengj@18440
|
727 |
val xor_words = List.foldl Word.xorb 0w0;
|
mengj@18440
|
728 |
|
mengj@18440
|
729 |
fun hash_combterm (CombVar(_,_),w) = w
|
paulson@18449
|
730 |
| hash_combterm (CombFree(f,_),w) = Polyhash.hashw_string(f,w)
|
paulson@18449
|
731 |
| hash_combterm (CombConst(c,tp,tps),w) = Polyhash.hashw_string(c,w)
|
paulson@18449
|
732 |
| hash_combterm (CombApp(f,arg,tp),w) = hash_combterm (arg, hash_combterm (f,w))
|
mengj@18440
|
733 |
| hash_combterm (Bool(t),w) = hash_combterm (t,w)
|
mengj@18440
|
734 |
| hash_combterm (Equal(t1,t2),w) =
|
paulson@18449
|
735 |
List.foldl hash_combterm (Polyhash.hashw_string ("equal",w)) [t1,t2]
|
mengj@18440
|
736 |
|
mengj@18440
|
737 |
fun hash_literal (Literal(true,pred)) = hash_combterm(pred,0w0)
|
mengj@18440
|
738 |
| hash_literal (Literal(false,pred)) = Word.notb(hash_combterm(pred,0w0));
|
mengj@18440
|
739 |
|
mengj@18440
|
740 |
fun hash_clause clause = xor_words (map hash_literal (get_literals clause));
|
mengj@18440
|
741 |
|
mengj@19198
|
742 |
(**********************************************************************)
|
mengj@19198
|
743 |
(* write clauses to files *)
|
mengj@19198
|
744 |
(**********************************************************************)
|
mengj@19198
|
745 |
|
mengj@19198
|
746 |
fun read_in [] = []
|
mengj@19198
|
747 |
| read_in (f1::fs) =
|
mengj@19198
|
748 |
let val lines = read_in fs
|
mengj@19198
|
749 |
val input = TextIO.openIn f1
|
mengj@19198
|
750 |
fun reading () =
|
mengj@19198
|
751 |
let val nextline = TextIO.inputLine input
|
mengj@19198
|
752 |
in
|
mengj@19198
|
753 |
if nextline = "" then (TextIO.closeIn input; [])
|
mengj@19198
|
754 |
else nextline::(reading ())
|
mengj@19198
|
755 |
end
|
mengj@19198
|
756 |
in
|
mengj@19198
|
757 |
((reading ()) @ lines)
|
mengj@19198
|
758 |
end;
|
mengj@19198
|
759 |
|
mengj@19198
|
760 |
|
mengj@19198
|
761 |
fun get_helper_clauses (full,partial,const,untyped) =
|
mengj@19198
|
762 |
let val (helper1,noS,inclS) = case !typ_level of T_FULL => (warning "Fully-typed HOL"; full)
|
mengj@19198
|
763 |
| T_PARTIAL => (warning "Partially-typed HOL"; partial)
|
mengj@19198
|
764 |
| T_CONST => (warning "Const-only-typed HOL"; const)
|
mengj@19198
|
765 |
| T_NONE => (warning "Untyped HOL"; untyped)
|
mengj@19198
|
766 |
val needed_helpers = if !include_combS then (warning "Include combinator S"; [helper1,inclS]) else
|
mengj@19198
|
767 |
if !include_min_comb then (warning "Include min combinators"; [helper1,noS])
|
mengj@19198
|
768 |
else (warning "No combinator is used"; [helper1])
|
mengj@19198
|
769 |
in
|
mengj@19198
|
770 |
read_in needed_helpers
|
mengj@19198
|
771 |
end;
|
mengj@19198
|
772 |
|
mengj@19198
|
773 |
|
mengj@19198
|
774 |
(* write TPTP format to a single file *)
|
mengj@19198
|
775 |
(* when "get_helper_clauses" is called, "include_combS" and "include_min_comb" should have correct values already *)
|
mengj@19444
|
776 |
fun tptp_write_file thms filename (axclauses,classrel_clauses,arity_clauses) helpers =
|
mengj@19444
|
777 |
let val clss = make_conjecture_clauses thms
|
mengj@19444
|
778 |
val axclauses' = make_axiom_clauses axclauses
|
mengj@19198
|
779 |
val (tptp_clss,tfree_litss) = ListPair.unzip (map clause2tptp clss)
|
mengj@19198
|
780 |
val tfree_clss = map ResClause.tptp_tfree_clause (foldl (op union_string) [] tfree_litss)
|
mengj@19198
|
781 |
val out = TextIO.openOut filename
|
mengj@19198
|
782 |
val helper_clauses = get_helper_clauses helpers
|
mengj@19198
|
783 |
in
|
mengj@19198
|
784 |
List.app (curry TextIO.output out o #1 o clause2tptp) axclauses';
|
mengj@19198
|
785 |
ResClause.writeln_strs out tfree_clss;
|
mengj@19198
|
786 |
ResClause.writeln_strs out tptp_clss;
|
mengj@19198
|
787 |
List.app (curry TextIO.output out o ResClause.tptp_classrelClause) classrel_clauses;
|
mengj@19198
|
788 |
List.app (curry TextIO.output out o ResClause.tptp_arity_clause) arity_clauses;
|
mengj@19198
|
789 |
List.app (curry TextIO.output out) helper_clauses;
|
mengj@19198
|
790 |
TextIO.closeOut out
|
mengj@19198
|
791 |
end;
|
mengj@19198
|
792 |
|
mengj@17998
|
793 |
end |