Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:10:44 2013

Optimize a model with 550 rows, 25050 columns and 50050 nonzeros
Presolve time: 0.03s
Presolved: 550 rows, 25050 columns, 50050 nonzeros
Variable types: 25000 continuous, 50 integer (50 binary)

Root relaxation: objective 5.275654e+04, 835 iterations, 0.02 seconds

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

     0     0 52756.5367    0    7          - 52756.5367     -      -    0s
H    0     0                    55369.000000 52756.5367  4.72%     -    0s
H    0     0                    53215.000000 52756.5367  0.86%     -    0s
     0     0 53141.4492    0    4 53215.0000 53141.4492  0.14%     -    0s
     0     0 53173.1588    0    3 53215.0000 53173.1588  0.08%     -    0s
     0     0 53173.1588    0    7 53215.0000 53173.1588  0.08%     -    0s
     0     0 53173.1588    0    4 53215.0000 53173.1588  0.08%     -    0s
     0     0 53173.3565    0    3 53215.0000 53173.3565  0.08%     -    0s
     0     0 53179.3983    0    3 53215.0000 53179.3983  0.07%     -    0s
     0     0 53179.4742    0    3 53215.0000 53179.4742  0.07%     -    0s
     0     0 53179.4763    0    3 53215.0000 53179.4763  0.07%     -    0s
     0     0     cutoff    0      53215.0000 53215.0000   0.0%     -    0s

Cutting planes:
  Implied bound: 76
  Flow cover: 3

Explored 0 nodes (1999 simplex iterations) in 0.46 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.321500000000e+04, best bound 5.321500000000e+04, gap 0.0%