Goal:
    A : Type  l' : list A  v : nat  H : v < 0
  ============================
   (nth_error l' v = nth_error [] v)


DEBUG:Going to execute:
inversion H

Goals:

DEBUG:Going to execute:
do_ccl

Goals:

DEBUG:Going to execute:
try do_atom; repeat (do_intro; try do_atom); try arith_congr;
            (solve [ split; do_ccl ])

Goals:

DEBUG:Going to execute:
try do_atom; repeat (do_intro; try do_atom); try arith_congr;
            (solve [ split; do_ccl ])

Goals:

DEBUG:Going to execute:
try do_atom; repeat (do_intro; try do_atom); try arith_congr

Goals:

DEBUG:Going to execute:
try do_atom; repeat (do_intro; try do_atom)

Goals:

DEBUG:Going to execute:
try do_atom

Goals:

DEBUG:Going to execute:
repeat (do_intro; try do_atom)

Goals:

DEBUG:Going to execute:
try arith_congr

Goals:

DEBUG:Going to execute:
solve [ split; do_ccl ]