Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:09:00 2013

Optimize a model with 539 rows, 24059 columns and 48069 nonzeros
Presolve time: 0.03s
Presolved: 539 rows, 24059 columns, 48069 nonzeros
Variable types: 24010 continuous, 49 integer (49 binary)

Root relaxation: objective 5.673892e+04, 1221 iterations, 0.03 seconds

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

     0     0 56738.9245    0    5          - 56738.9245     -      -    0s
H    0     0                    57544.000000 56738.9245  1.40%     -    0s
H    0     0                    57072.000000 56738.9245  0.58%     -    0s
     0     0 56966.1128    0    3 57072.0000 56966.1128  0.19%     -    0s
     0     0 56974.2458    0    2 57072.0000 56974.2458  0.17%     -    0s
     0     0 56974.2458    0    5 57072.0000 56974.2458  0.17%     -    0s
     0     0 56974.2458    0    3 57072.0000 56974.2458  0.17%     -    0s
     0     0 56974.2458    0    2 57072.0000 56974.2458  0.17%     -    0s
     0     0 56976.9818    0    2 57072.0000 56976.9818  0.17%     -    0s
     0     0 56982.2402    0    2 57072.0000 56982.2402  0.16%     -    0s
     0     0 56982.2402    0    2 57072.0000 56982.2402  0.16%     -    0s
     0     0 56982.2402    0    2 57072.0000 56982.2402  0.16%     -    0s
     0     0 56993.0084    0    2 57072.0000 56993.0084  0.14%     -    0s
     0     0 56999.9256    0    1 57072.0000 56999.9256  0.13%     -    0s
     0     2 57003.0503    0    1 57072.0000 57003.0503  0.12%     -    0s
*    5     1               4    57032.000000 57032.0000   0.0%  31.2    0s

Cutting planes:
  Implied bound: 44
  Flow cover: 2

Explored 6 nodes (2447 simplex iterations) in 0.61 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.703200000000e+04, best bound 5.703200000000e+04, gap 0.0%