Goal:
  
  A : Type
  Aeq : ReflectEq A
  x : A
  y : A
  H : reflectProp (x = y) true
  H0 : x = y
  ============================
   (x = y)


DEBUG:Going to execute:
solve
[ trivial
with eq_true
| Init.reflexivity
| Init.symmetry; trivial
| contradiction
| congruence ]