Challenge 4: Verify memory safety of BTreeMap node module#577
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Samuelsills wants to merge 2 commits intomodel-checking:mainfrom
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Challenge 4: Verify memory safety of BTreeMap node module#577Samuelsills wants to merge 2 commits intomodel-checking:mainfrom
Samuelsills wants to merge 2 commits intomodel-checking:mainfrom
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Add Kani proof harnesses for BTreeMap node functions specified in Challenge model-checking#4. Covers LeafNode::new, NodeRef methods (len, ascend, first_edge, last_edge, first_kv, last_kv, into_leaf, keys, as_leaf_mut, into_leaf_mut, as_leaf_dying, push, as_internal_mut), Handle methods (left_edge, right_edge, left_kv, right_kv, into_kv, key_mut, into_val_mut, into_kv_mut, into_kv_valmut, kv_mut, descend), and new_internal. Resolves model-checking#77 Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>
Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>
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Verification Coverage ReportBounded Functions (25/26 ✅)
Note: Unbounded Functions (2/8)
UBs Checked (automatic via Kani/CBMC)
Verification Approach
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Summary
Add Kani proof harnesses for BTreeMap node functions specified in Challenge #4:
Bounded functions (25):
LeafNode::new,NodeRef::len,NodeRef::ascend,NodeRef::first_edge,NodeRef::last_edge,NodeRef::first_kv,NodeRef::last_kv,NodeRef::into_leaf,NodeRef::keys,NodeRef::as_leaf_mut,NodeRef::into_leaf_mut,NodeRef::as_leaf_dying,NodeRef::push,NodeRef::as_internal_mutHandle::left_edge,Handle::right_edge,Handle::left_kv,Handle::right_kv,Handle::into_kv,Handle::key_mut,Handle::into_val_mut,Handle::into_kv_mut,Handle::into_kv_valmut,Handle::kv_mut,Handle::descendUnbounded functions (2):
NodeRef::new_internal(allocation + child link)Handle::descend(traversal to child)All harnesses verified locally with Kani.
Resolves #77