Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:27:20 2013

Optimize a model with 34278 rows, 33698 columns and 134618 nonzeros
Presolve removed 1446 rows and 0 columns
Presolve time: 0.20s
Presolved: 32832 rows, 33698 columns, 131726 nonzeros
Variable types: 33640 continuous, 58 integer (58 binary)

Root relaxation: objective 7.022882e+04, 6367 iterations, 0.82 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

     0     0 70228.8169    0    3          - 70228.8169     -      -    1s
H    0     0                    70780.000000 70228.8169  0.78%     -    1s
H    0     0                    70274.000000 70228.8169  0.06%     -    1s
     0     0 70230.7388    0    5 70274.0000 70230.7388  0.06%     -    1s
     0     0 70230.7427    0    6 70274.0000 70230.7427  0.06%     -    1s
     0     0 70230.7427    0    6 70274.0000 70230.7427  0.06%     -    1s
     0     0 70272.1086    0    2 70274.0000 70272.1086  0.00%     -    2s

Cutting planes:
  Gomory: 2
  Flow cover: 7

Explored 0 nodes (6579 simplex iterations) in 2.30 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.027400000000e+04, best bound 7.027210856221e+04, gap 0.0027%