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Sound dual bounds for large conv nets (part 2/3 of #115) - #118
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Part 2 of 3 of SVF-tools#115. - Forward bounds keep explicit linear terms only for the perturbed input dimensions (DualConfig.forward_lin_max_perturbed, default 100, mirrored in backend.yaml); above the cap the forward pass is interval-only. - MaxPool gets a linear relaxation; conv bounds use centre-radius numerics with lane chunking. Fixes the lb > ub crash on VGG16.
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## main #118 +/- ##
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- Coverage 76.91% 76.90% -0.02%
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Files 91 91
Lines 22143 22367 +224
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+ Hits 17031 17201 +170
- Misses 5112 5166 +54
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Part 3 of 3 of SVF-tools#115 (parts 1 and 2 merged as SVF-tools#116 and SVF-tools#118). - CLIMB certificate reuse (opt-in): certified dual certificates are replayed as ReLU phase cores and propagated to prune BaB subproblems early (bab/climb.py). - BaB restructuring: split, violation-check and multi-split logic move out of bab.py into node.py, violation.py and branching/multi_split.py (bab.py 2191 -> 1151 lines, branching.py 1217 -> 1094). - BaB config: reuse_root_bounds becomes the root_bounds_reuse tri-state; CLIMB preset; every backend.yaml option documented; input splits can no longer pick a zero-width dimension. - CI: act-bab.yml grep checks replaced by in-source invariants and exit-status checks.
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Part 2 of 3 of #115.
DualConfig.forward_lin_max_perturbed, mirrored inbackend.yaml); interval-only above the cap.