FisSal2011: Keep only active cuts at the end

src/Cuts/tableau/gmi_dual.jl

@@ -744,6 +744,17 @@ function collect_gmi_FisSal2011(
     end
 
     @info "Best gap closure: $(gapcl_best)"
+    
+    @timeit "Keep only active cuts" begin
+        positive_idx = findall(multipliers_best .> 1e-6)
+        @info "Keeping $(length(positive_idx)) active cuts"
+        pool.lhs = pool.lhs[:, positive_idx]
+        pool.lb = pool.lb[positive_idx]
+        pool.ub = pool.ub[positive_idx]
+        pool.hash = pool.hash[positive_idx]
+        multipliers_best = multipliers_best[positive_idx]
+        multipliers_curr = multipliers_curr[positive_idx]
+    end
 
     to = TimerOutputs.get_defaulttimer()
     stats_time = TimerOutputs.tottime(to) / 1e9