Thm* M1,M2:MsgA.
Thm* M1 M2
Thm* 
Thm* ( k:Knd, l:IdLnk, s:M2.state, v:M2.da(k), i:Id, ms:(tg:Id
Thm* ( k:Knd, l:IdLnk, s:M2.state, v:M2.da(k), i:Id, ms:( if source(l) = i
Thm* ( k:Knd, l:IdLnk, s:M2.state, v:M2.da(k), i:Id, ms:( if M2.da(rcv(l; tg))
Thm* ( k:Knd, l:IdLnk, s:M2.state, v:M2.da(k), i:Id, ms:( else Top fi) List.
Thm* (M2.send(k;l;s;v;ms;i)  M1.send(k;l;s;v;ms;i)) | [ma-send-sub] |
Thm* M1,M2:MsgA.
Thm* M1 M2
Thm* 
Thm* ( k:Knd, x:Id, s:M2.state, v:M2.da(k), w:M2.ds(x).
Thm* (M2.ef(k,x,s,v,w)  M1.ef(k,x,s,v,w)) | [ma-ef-sub] |
Thm* M1,M2:MsgA.
Thm* M1 M2
Thm* 
Thm* ( a:Id, s:M2.state, v:M2.da(locl(a)). M2.pre(a,s,v)  M1.pre(a,s,v)) | [ma-pre-sub] |
Thm* M1,M2:MsgA, k:Knd. M1 M2  (M2.da(k) r M1.da(k)) | [ma-da-sub] |
Thm* M:MsgA, k:Knd, l:IdLnk, s:M.state, v:M.V(k), i:Id, ms:(tg:Id
Thm* M:MsgA, k:Knd, l:IdLnk, s:M.state, v:M.V(k), i:Id, ms:( if source(l) = i
Thm* M:MsgA, k:Knd, l:IdLnk, s:M.state, v:M.V(k), i:Id, ms:( if M.da(rcv
Thm* M:MsgA, k:Knd, l:IdLnk, s:M.state, v:M.V(k), i:Id, ms:( if (l; tg))
Thm* M:MsgA, k:Knd, l:IdLnk, s:M.state, v:M.V(k), i:Id, ms:( else Top fi) List.
Thm* M.send(k;l;s;v;ms;i) Prop | [ma-send_wf] |
Thm* M:MsgA, k:Knd, s:M.state, v:M.da(k), x:Id, w:M.ds(x).
Thm* M.ef(k,x,s,v,w) Prop | [ma-ef_wf] |
Thm* M:MsgA, a:Id, s:M.state, v:M.da(locl(a)). M.pre(a,s,v) Prop | [ma-pre_wf] |
Def PossibleWorld(D;w)
Def == FairFifo
Def == & ( i,x:Id. vartype(i;x) r M(i).ds(x))
Def == & & ( i:Id, a:Action(i).
Def == & & ( isnull(a)  (valtype(i;a) r M(i).da(kind(a))))
Def == & & ( l:IdLnk, tg:Id. (w.M(l,tg)) r M(source(l)).da(rcv(l; tg)))
Def == & & ( i,x:Id. M(i).init(x,s(i;0).x))
Def == & & ( i:Id, t: .
Def == & & ( isnull(a(i;t))
Def == & & (
Def == & & (( islocal(kind(a(i;t)))
Def == & & ((
Def == & & ((M(i).pre(act(kind(a(i;t))), x.s(i;t).x,val(a(i;t))))
Def == & & (& ( x:Id.
Def == & & (& (M(i).ef(kind(a(i;t)),x, x.s(i;t).x,val(a(i;t)),s(i;t+1).x))
Def == & & (& ( l:IdLnk.
Def == & & (& (M(i).send(kind(a(i;t));l; x.
Def == & & (& (s(i;t).x;val(a(i;t));withlnk(l;m(i;t));i))
Def == & & (& ( x:Id.
Def == & & (& ( M(i).frame(kind(a(i;t)) affects x)
Def == & & (& (
Def == & & (& (s(i;t).x = s(i;t+1).x M(i).ds(x))
Def == & & (& ( l:IdLnk, tg:Id.
Def == & & (& ( M(i).sframe(kind(a(i;t)) sends <l,tg>)
Def == & & (& (
Def == & & (& (w-tagged(tg; onlnk(l;m(i;t))) = nil Msg List))
Def == & & ( i,a:Id, t: .
Def == & & ( t': .
Def == & & (t t'
Def == & & (&  isnull(a(i;t')) & kind(a(i;t')) = locl(a)
Def == & & (& a declared in M(i)
Def == & & (& unsolvable M(i).pre(a, x.s(i;t').x)) | [possible-world] |