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fix: handling BitVec.ofNat with Nat fvars in bv_decide #5484

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Sep 26, 2024
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fix: handling BitVec.ofNat with Nat fvars in bv_decide #5484

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2 changes: 1 addition & 1 deletion src/Lean/Elab/Tactic/BVDecide/Frontend/BVDecide/ReifiedBVExpr.lean
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Original file line number Diff line number Diff line change
Expand Up @@ -343,7 +343,7 @@ where
return mkApp4 congrProof (toExpr inner.width) innerExpr innerEval innerProof

goBvLit (x : Expr) : M (Option ReifiedBVExpr) := do
let some ⟨width, bvVal⟩ ← getBitVecValue? x | return none
let some ⟨width, bvVal⟩ ← getBitVecValue? x | return ← ofAtom x
let bvExpr : BVExpr width := .const bvVal
let expr := mkApp2 (mkConst ``BVExpr.const) (toExpr width) (toExpr bvVal)
let proof := do
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4 changes: 4 additions & 0 deletions tests/lean/run/bv_decide_nat.lean
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@@ -0,0 +1,4 @@
import Std.Tactic.BVDecide

theorem cex (n : Nat) (hn : BitVec.ofNat 64 n ≠ 0) : BitVec.ofNat 64 n ≠ 0#64 := by
bv_decide
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