Gurobi 5.0.1 (linux64) logging started Fri Jan 18 08:19:14 2013 Optimize a model with 1700 rows, 75650 columns and 651700 nonzeros Presolve removed 50 rows and 50 columns Presolve time: 1.08s Presolved: 1650 rows, 75600 columns, 601650 nonzeros Variable types: 75100 continuous, 500 integer (500 binary) Root relaxation: objective 1.749223e+05, 2553 iterations, 0.23 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 174922.321 0 6 - 174922.321 - - 1s 0 0 174923.238 0 6 - 174923.238 - - 2s 0 0 174923.413 0 6 - 174923.413 - - 2s 0 0 174923.501 0 6 - 174923.501 - - 3s 0 0 174923.530 0 6 - 174923.530 - - 3s 0 0 174923.544 0 6 - 174923.544 - - 4s 0 0 174923.588 0 6 - 174923.588 - - 4s 0 0 174923.588 0 6 - 174923.588 - - 5s 0 0 174923.588 0 6 - 174923.588 - - 5s 0 2 174929.170 0 6 - 174929.170 - - 13s 16 18 175755.141 15 4 - 174948.710 - 29.6 15s * 117 58 116 176978.02721 174948.710 1.15% 7.5 19s 120 56 175095.640 3 3 176978.027 175095.640 1.06% 8.2 20s H 281 178 176823.08654 175133.057 0.96% 8.4 23s 325 211 175673.154 2 6 176823.087 175432.922 0.79% 7.9 25s * 399 36 20 176245.18528 175550.124 0.39% 10.1 27s * 459 10 28 176244.25923 176200.052 0.03% 12.8 29s * 471 6 26 176210.47446 176202.647 0.00% 12.6 29s Cutting planes: Flow cover: 8 Explored 472 nodes (9030 simplex iterations) in 29.91 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.762104744630e+05, best bound 1.762026472825e+05, gap 0.0044%