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

Optimize a model with 34278 rows, 33698 columns and 134618 nonzeros
Presolve removed 2748 rows and 0 columns
Presolve time: 0.20s
Presolved: 31530 rows, 33698 columns, 129122 nonzeros
Variable types: 33640 continuous, 58 integer (58 binary)

Root relaxation: objective 6.279762e+04, 6337 iterations, 0.78 seconds

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

     0     0 62797.6177    0    6          - 62797.6177     -      -    1s
H    0     0                    65970.000000 62797.6177  4.81%     -    1s
H    0     0                    65195.000000 62797.6177  3.68%     -    1s
     0     0 62797.9883    0    8 65195.0000 62797.9883  3.68%     -    1s
     0     0 62798.1715    0    7 65195.0000 62798.1715  3.68%     -    1s
     0     0 62798.3357    0    7 65195.0000 62798.3357  3.68%     -    1s
H    0     0                    64713.000000 62798.3357  2.96%     -    2s
H    0     0                    62989.000000 62798.3357  0.30%     -    2s
     0     0 62798.3357    0    5 62989.0000 62798.3357  0.30%     -    3s
     0     0 62799.1683    0    6 62989.0000 62799.1683  0.30%     -    3s
     0     2 62803.1733    0    6 62989.0000 62803.1733  0.30%     -    3s
*    8     6               6    62964.000000 62858.6786  0.17%  60.4    3s
*   19     4               7    62925.000000 62880.3750  0.07%  63.8    3s

Cutting planes:
  Gomory: 1
  Flow cover: 3

Explored 26 nodes (9774 simplex iterations) in 4.02 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.292500000000e+04, best bound 6.292500000000e+04, gap 0.0%