Gurobi 5.0.1 (linux64) logging started Sat Dec  8 03:30:35 2012

Optimize a model with 1635 rows, 1620 columns and 5902 nonzeros
Presolve removed 224 rows and 68 columns
Presolve time: 0.01s
Presolved: 1411 rows, 1552 columns, 5409 nonzeros
Variable types: 1383 continuous, 169 integer (169 binary)

Root relaxation: objective 5.762367e+04, 235 iterations, 0.00 seconds

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

     0     0 57623.6724    0    4          - 57623.6724     -      -    0s
H    0     0                    58245.000000 57623.6724  1.07%     -    0s
H    0     0                    57989.000000 57623.6724  0.63%     -    0s
     0     0 57627.4831    0    9 57989.0000 57627.4831  0.62%     -    0s
     0     0 57627.7099    0   10 57989.0000 57627.7099  0.62%     -    0s
     0     0 57628.4267    0   10 57989.0000 57628.4267  0.62%     -    0s
     0     0 57628.5917    0   11 57989.0000 57628.5917  0.62%     -    0s
     0     0 57628.7107    0    9 57989.0000 57628.7107  0.62%     -    0s
H    0     0                    57755.000000 57628.7107  0.22%     -    0s
     0     0 57628.7107    0    4 57755.0000 57628.7107  0.22%     -    0s
     0     0 57628.7107    0    9 57755.0000 57628.7107  0.22%     -    0s
     0     0 57628.7107    0    9 57755.0000 57628.7107  0.22%     -    0s
     0     2 57639.6661    0    9 57755.0000 57639.6661  0.20%     -    0s
*   13     5              12    57679.000000 57643.4535  0.06%   3.3    0s
*   15     0               2    57657.000000 57657.0000   0.0%   3.1    0s

Cutting planes:
  Gomory: 2
  Flow cover: 4

Explored 16 nodes (464 simplex iterations) in 0.09 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.765700000000e+04, best bound 5.765700000000e+04, gap 0.0%