Gurobi 5.0.1 (linux64) logging started Sat Dec  8 03:30:36 2012

Optimize a model with 1635 rows, 1620 columns and 5927 nonzeros
Presolve removed 171 rows and 41 columns
Presolve time: 0.02s
Presolved: 1464 rows, 1579 columns, 5555 nonzeros
Variable types: 1408 continuous, 171 integer (171 binary)

Root relaxation: objective 6.237429e+04, 257 iterations, 0.00 seconds

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

     0     0 62374.2876    0    2          - 62374.2876     -      -    0s
H    0     0                    62722.000000 62374.2876  0.55%     -    0s
H    0     0                    62689.000000 62374.2876  0.50%     -    0s
     0     0 62390.1249    0    5 62689.0000 62390.1249  0.48%     -    0s
     0     0 62401.1401    0    8 62689.0000 62401.1401  0.46%     -    0s
     0     0 62408.4215    0    7 62689.0000 62408.4215  0.45%     -    0s
     0     0 62408.7765    0    9 62689.0000 62408.7765  0.45%     -    0s
     0     0 62408.7765    0    2 62689.0000 62408.7765  0.45%     -    0s
     0     0 62408.7765    0    7 62689.0000 62408.7765  0.45%     -    0s
     0     0 62410.8384    0   13 62689.0000 62410.8384  0.44%     -    0s
     0     0 62410.8448    0   13 62689.0000 62410.8448  0.44%     -    0s
H    0     0                    62411.000000 62410.8448  0.00%     -    0s

Cutting planes:
  Gomory: 4
  Flow cover: 1

Explored 0 nodes (484 simplex iterations) in 0.09 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.241100000000e+04, best bound 6.241084477440e+04, gap 0.0002%