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Fix lexicographic search #969

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Merged
rapids-bot merged 2 commits into from
Mar 19, 2026
Merged

Fix lexicographic search #969

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b91f70e
fix
rgsl888prabhu Mar 17, 2026
27f087a
fix
rgsl888prabhu Mar 18, 2026
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15 changes: 8 additions & 7 deletions cpp/src/routing/ges/lexicographic_search/lexicographic_search.cu
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Original file line number Diff line number Diff line change
Expand Up @@ -685,13 +685,6 @@ bool guided_ejection_search_t<i_t, f_t, REQUEST>::run_lexicographic_search(
k_max = 4;
}

// As we fix the insertion we don't need to try k_max permutations of insertion for cvrptw
i_t n_blocks_lexico = (solution_ptr->get_num_orders() + solution_ptr->get_n_routes() -
solution_ptr->problem_ptr->order_info.depot_included_);
if constexpr (REQUEST == request_t::PDP) {
n_blocks_lexico *= max_neighbors<i_t, REQUEST>(k_max);
}

size_t sh_size = 0;
bool is_set = false;
while (k_max > 1) {
Expand All @@ -705,6 +698,14 @@ bool guided_ejection_search_t<i_t, f_t, REQUEST>::run_lexicographic_search(
}

if (k_max == 1 || !is_set) { return false; }

// Compute n_blocks_lexico after k_max is finalized by the while-loop above
i_t n_blocks_lexico = (solution_ptr->get_num_orders() + solution_ptr->get_n_routes() -
solution_ptr->problem_ptr->order_info.depot_included_);
if constexpr (REQUEST == request_t::PDP) {
n_blocks_lexico *= max_neighbors<i_t, REQUEST>(k_max);
}

// Init global min before call to lexicographic
const auto max = std::numeric_limits<typename decltype(global_min_p_)::value_type>::max();
const i_t zero = 0;
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