Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:10:16 2013

Optimize a model with 25550 rows, 25050 columns and 100050 nonzeros
Presolve removed 2479 rows and 0 columns
Presolve time: 0.14s
Presolved: 23071 rows, 25050 columns, 95092 nonzeros
Variable types: 25000 continuous, 50 integer (50 binary)

Root relaxation: objective 5.401460e+04, 4367 iterations, 0.42 seconds

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

     0     0 54014.6035    0    2          - 54014.6035     -      -    0s
H    0     0                    54245.000000 54014.6035  0.42%     -    0s
H    0     0                    54081.000000 54014.6035  0.12%     -    0s
     0     0 54018.9634    0    4 54081.0000 54018.9634  0.11%     -    0s
     0     0 54018.9634    0    2 54081.0000 54018.9634  0.11%     -    1s
     0     0 54019.4335    0    5 54081.0000 54019.4335  0.11%     -    1s
     0     0 54020.2754    0    5 54081.0000 54020.2754  0.11%     -    1s
     0     0 54052.8723    0    1 54081.0000 54052.8723  0.05%     -    1s
     0     2 54055.5567    0    1 54081.0000 54055.5567  0.05%     -    1s

Cutting planes:
  Gomory: 2
  Flow cover: 1

Explored 3 nodes (6331 simplex iterations) in 1.77 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.408100000000e+04, best bound 5.408100000000e+04, gap 0.0%