Gurobi 5.0.1 (linux64) logging started Fri Jan 18 05:51:06 2013 Optimize a model with 640 rows, 24700 columns and 248380 nonzeros Presolve removed 20 rows and 500 columns Presolve time: 0.43s Presolved: 620 rows, 24200 columns, 228380 nonzeros Variable types: 24020 continuous, 180 integer (180 binary) Root relaxation: objective 4.642213e+04, 668 iterations, 0.03 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 46422.1265 0 21 - 46422.1265 - - 0s 0 0 46422.6092 0 21 - 46422.6092 - - 0s 0 0 46422.6092 0 21 - 46422.6092 - - 0s 0 0 46422.6092 0 21 - 46422.6092 - - 1s 0 0 46422.6092 0 21 - 46422.6092 - - 1s 0 0 46422.6092 0 21 - 46422.6092 - - 1s 0 2 46423.8606 0 21 - 46423.8606 - - 3s * 187 182 155 48648.255021 46423.9782 4.57% 6.9 4s * 191 180 154 48612.958676 46423.9782 4.50% 6.8 4s * 200 179 154 48605.456316 46423.9782 4.49% 6.5 4s * 230 38 29 46812.946031 46430.8076 0.82% 6.7 4s * 252 41 19 46812.801779 46430.8076 0.82% 7.1 4s * 277 49 24 46812.404877 46442.5459 0.79% 7.4 4s 302 59 cutoff 15 46812.4049 46443.5880 0.79% 7.7 5s * 313 47 14 46793.695489 46449.2491 0.74% 8.1 5s * 356 59 28 46793.680536 46466.2351 0.70% 7.8 5s * 359 56 25 46793.559382 46466.2351 0.70% 7.8 5s * 372 28 14 46747.257409 46468.1614 0.60% 7.9 5s * 472 17 19 46745.506383 46735.9996 0.02% 8.5 5s * 480 16 9 46743.816100 46735.9996 0.02% 8.4 5s Cutting planes: Flow cover: 5 Explored 514 nodes (5615 simplex iterations) in 5.92 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.674381610004e+04, best bound 4.673917139058e+04, gap 0.0099%