rename_i lw rw
case append
w : Nat
assign : Assignment
l✝ r✝ : Nat
lhs : BVExpr l✝
rhs : BVExpr r✝
lih :
  ∀ (aig : AIG BVBit) (idx : Nat) (hidx : idx < l✝),
    ⟦{ aig := (go aig lhs).val.aig, ref := (go aig lhs).val.stream.getRef idx hidx }, assign.toAIGAssignment⟧ =
      (eval assign lhs).getLsb idx
rih :
  ∀ (aig : AIG BVBit) (idx : Nat) (hidx : idx < r✝),
    ⟦{ aig := (go aig rhs).val.aig, ref := (go aig rhs).val.stream.getRef idx hidx }, assign.toAIGAssignment⟧ =
      (eval assign rhs).getLsb idx
aig : AIG BVBit
idx : Nat
hidx : idx < l✝ + r✝
⊢ ⟦{ aig := (go aig (lhs.append rhs)).val.aig, ref := (go aig (lhs.append rhs)).val.stream.getRef idx hidx },
      assign.toAIGAssignment⟧ =
    (eval assign (lhs.append rhs)).getLsb idx
case append
w : Nat
assign : Assignment
lw rw : Nat
lhs : BVExpr lw
rhs : BVExpr rw
lih :
  ∀ (aig : AIG BVBit) (idx : Nat) (hidx : idx < lw),
    ⟦{ aig := (go aig lhs).val.aig, ref := (go aig lhs).val.stream.getRef idx hidx }, assign.toAIGAssignment⟧ =
      (eval assign lhs).getLsb idx
rih :
  ∀ (aig : AIG BVBit) (idx : Nat) (hidx : idx < rw),
    ⟦{ aig := (go aig rhs).val.aig, ref := (go aig rhs).val.stream.getRef idx hidx }, assign.toAIGAssignment⟧ =
      (eval assign rhs).getLsb idx
aig : AIG BVBit
idx : Nat
hidx : idx < lw + rw
⊢ ⟦{ aig := (go aig (lhs.append rhs)).val.aig, ref := (go aig (lhs.append rhs)).val.stream.getRef idx hidx },
      assign.toAIGAssignment⟧ =
    (eval assign (lhs.append rhs)).getLsb idx