Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:20:35 2013

Optimize a model with 605 rows, 30305 columns and 60555 nonzeros
Presolve time: 0.04s
Presolved: 605 rows, 30305 columns, 60555 nonzeros
Variable types: 30250 continuous, 55 integer (55 binary)

Root relaxation: objective 5.214733e+04, 1110 iterations, 0.03 seconds

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

     0     0 52147.3349    0    7          - 52147.3349     -      -    0s
H    0     0                    54317.000000 52147.3349  3.99%     -    0s
H    0     0                    52514.000000 52147.3349  0.70%     -    0s
     0     0 52398.1918    0    1 52514.0000 52398.1918  0.22%     -    0s
     0     0 52398.1918    0    1 52514.0000 52398.1918  0.22%     -    0s
     0     0 52398.1918    0    5 52514.0000 52398.1918  0.22%     -    0s
     0     0 52398.1918    0    2 52514.0000 52398.1918  0.22%     -    0s
     0     0 52398.1918    0    2 52514.0000 52398.1918  0.22%     -    0s
     0     0 52398.2634    0    2 52514.0000 52398.2634  0.22%     -    0s
     0     0 52399.2942    0    2 52514.0000 52399.2942  0.22%     -    0s
     0     0 52399.4412    0    1 52514.0000 52399.4412  0.22%     -    0s
     0     0 52399.4412    0    1 52514.0000 52399.4412  0.22%     -    0s
     0     2 52401.2258    0    1 52514.0000 52401.2258  0.21%     -    0s
*    4     0               3    52507.000000 52507.0000   0.0%  75.2    0s

Cutting planes:
  Implied bound: 51
  Flow cover: 3

Explored 5 nodes (2739 simplex iterations) in 0.69 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.250700000000e+04, best bound 5.250700000000e+04, gap 0.0%