Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:15:55 2013

Optimize a model with 28673 rows, 28143 columns and 112413 nonzeros
Presolve removed 1560 rows and 0 columns
Presolve time: 0.16s
Presolved: 27113 rows, 28143 columns, 109293 nonzeros
Variable types: 28090 continuous, 53 integer (53 binary)

Root relaxation: objective 5.455831e+04, 4418 iterations, 0.51 seconds

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

     0     0 54558.3071    0    3          - 54558.3071     -      -    0s
H    0     0                    54712.000000 54558.3071  0.28%     -    0s
     0     0 54558.7447    0    4 54712.0000 54558.7447  0.28%     -    0s
     0     0 54558.7556    0    4 54712.0000 54558.7556  0.28%     -    1s
     0     0 54570.0524    0    3 54712.0000 54570.0524  0.26%     -    1s
     0     0 54570.2688    0    3 54712.0000 54570.2688  0.26%     -    1s
H    0     0                    54595.000000 54570.2688  0.05%     -    1s
     0     0 54570.2688    0    2 54595.0000 54570.2688  0.05%     -    2s
     0     0 54571.3804    0    4 54595.0000 54571.3804  0.04%     -    2s
     0     0 54571.4179    0    4 54595.0000 54571.4179  0.04%     -    2s
     0     0 54573.3448    0    2 54595.0000 54573.3448  0.04%     -    2s
     0     2 54579.8182    0    2 54595.0000 54579.8182  0.03%     -    2s

Cutting planes:
  Gomory: 2
  Flow cover: 2

Explored 3 nodes (5379 simplex iterations) in 2.53 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.459500000000e+04, best bound 5.459400000000e+04, gap 0.0018%