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feat: add adjustRef/mapOffset simplifications #850

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Merged
merged 1 commit into from
Nov 18, 2025
Merged

feat: add adjustRef/mapOffset simplifications #850

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14 changes: 13 additions & 1 deletion kmir/src/kmir/kdist/mir-semantics/lemmas/kmir-lemmas.md
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Original file line number Diff line number Diff line change
Expand Up @@ -60,6 +60,18 @@ Definedness of the list and list elements is also guaranteed.
rule #Ceil(#mapOffset(L, _)[I]) => #Ceil(L) #And {true #Equals 0 <=Int I} #And {true #Equals I <Int size(L)} [simplification]
rule #Ceil(#mapOffset(L, _)) => #Ceil(L) [simplification]
rule #adjustRef(VAL:Value, 0) => VAL [simplification]
rule #adjustRef(#adjustRef(VAL, OFFSET1), OFFSET2)
=> #adjustRef(VAL, OFFSET1 +Int OFFSET2)
[simplification]
rule #mapOffset(L, 0) => L [simplification]
rule #mapOffset(#mapOffset(L, OFFSET1), OFFSET2)
=> #mapOffset(L, OFFSET1 +Int OFFSET2)
[simplification]
```

## Simplifications for Int
Expand Down Expand Up @@ -196,4 +208,4 @@ Finally, the magnitude of a value converted from bytes is known to be within the

```k
endmodule
```
```
6 changes: 3 additions & 3 deletions ...sts/integration/data/prove-rs/show/pointer-cast-length-test-fail.array_cast_test.expected
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Expand Up @@ -41,14 +41,14 @@
┃ │
┃ │ (6 steps)
┃ ├─ 10
┃ │ #traverseProjection ( toStack ( 1 , local ( 2 ) ) , Range ( #mapOffset ( #mapOff
┃ │ #traverseProjection ( toStack ( 1 , local ( 2 ) ) , Range ( range ( #mapOffset (
┃ │ span: 87
┃ ┃
┃ ┃ (1 step)
┃ ┣━━┓
┃ ┃ │
┃ ┃ ├─ 11
┃ ┃ │ #traverseProjection ( toStack ( 1 , local ( 2 ) ) , Range ( range ( #mapOffset (
┃ ┃ │ #traverseProjection ( toStack ( 1 , local ( 2 ) ) , Range ( range ( range ( #map
┃ ┃ │ span: 87
┃ ┃ │
┃ ┃ │ (113 steps)
Expand All @@ -59,7 +59,7 @@
┃ ┗━━┓
┃ │
┃ └─ 12 (stuck, leaf)
┃ #traverseProjection ( toStack ( 1 , local ( 2 ) ) , Range ( #mapOffset ( #mapOff
┃ #traverseProjection ( toStack ( 1 , local ( 2 ) ) , Range ( range ( #mapOffset (
┃ span: 87
┃
┗━━┓
Expand Down