Goal:
    x : V.t  y : V.t  p : VSet.t  a : V.t  H0 : x = a
  ============================
   (y = a)


DEBUG:Going to execute:
t_solver
Level 3: Backtrace:

Failed to progress.
Level 3: Backtrace:

Failed to progress.
Level 3: Backtrace:

Failed to progress.
Level 4: Backtrace:

Failed to progress.
Level 3: Backtrace:

Failed to progress.
Level 3: Backtrace:

Failed to progress.
Level 3: Backtrace:

Failed to progress.
Level 3: Backtrace:

Failed to progress.
Level 3: Backtrace:

Failed to progress.
Level 2: Backtrace:

Failed to progress.