Goal:
    A : Type  P : list A → list A → A → A → Type  Q : list A → A → Type
  ============================
   (All2_fold P [] [])


DEBUG:Going to execute:
<coq-core.plugins.ltac::constructor@0>

Goals:

DEBUG:Going to execute:
auto

Goals:

DEBUG:Going to execute:
<coq-core.plugins.ltac::auto@0> $1 $2 $3