- let rec convert_machines ((k1,e1,t1,s1 as m1),(k2,e2,t2,s2 as m2),delta) =
+ let small_delta_step
+ ((_,_,t1,_ as m1), norm1 as x1) ((_,_,t2,_ as m2), norm2 as x2)
+ =
+ assert(not (norm1 && norm2));
+ if norm1 then
+ x1, R.reduce ~delta:(height_of t2 -1) ~subst context m2
+ else if norm2 then
+ R.reduce ~delta:(height_of t1 -1) ~subst context m1, x2
+ else
+ let h1 = height_of t1 in
+ let h2 = height_of t2 in
+ let delta = if h1 = h2 then max 0 (h1 -1) else min h1 h2 in
+ R.reduce ~delta ~subst context m1,
+ R.reduce ~delta ~subst context m2
+ in
+ let rec convert_machines test_eq_only
+ ((k1,e1,t1,s1),norm1 as m1),((k2,e2,t2,s2), norm2 as m2)
+ =