simp only [performRupAdd_success, ite_true] at incrementalChecker_success
case pos
α : Type u_1
β : Type u_2
σ : Type u_3
inst✝² : DecidableEq α
inst✝¹ : Clause α β
inst✝ : Formula α β σ
f : σ
f_readyForRupAdd : readyForRupAdd f
f_readyForRatAdd : readyForRatAdd f
p : α → Bool
pf : p ⊨ f
action✝ : Action β α
id✝ : Nat
c : β
rupHints : Array Nat
aWellFormed : wellFormedAction (Action.addRup id✝ c rupHints)
incrementalChecker_success :
  (if (performRupAdd f c rupHints).snd = true then ((performRupAdd f c rupHints).fst, out_of_proof)
      else ((performRupAdd f c rupHints).fst, rup_failure)).snd =
    success
performRupAdd_success : (performRupAdd f c rupHints).snd = true
⊢ False
no goals