Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:11:54 2013

Optimize a model with 26571 rows, 26061 columns and 104091 nonzeros
Presolve removed 3466 rows and 0 columns
Presolve time: 0.15s
Presolved: 23105 rows, 26061 columns, 97159 nonzeros
Variable types: 26010 continuous, 51 integer (51 binary)

Root relaxation: objective 5.144480e+04, 4116 iterations, 0.47 seconds

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

     0     0 51444.8045    0    4          - 51444.8045     -      -    0s
H    0     0                    53482.000000 51444.8045  3.81%     -    0s
H    0     0                    51604.000000 51444.8045  0.31%     -    0s
     0     0 51445.1948    0    6 51604.0000 51445.1948  0.31%     -    0s
     0     0 51445.1948    0    6 51604.0000 51445.1948  0.31%     -    1s
     0     0 51524.3049    0    2 51604.0000 51524.3049  0.15%     -    1s
     0     0     cutoff    0      51604.0000 51604.0000   0.0%     -    1s

Cutting planes:
  Gomory: 1
  Flow cover: 3

Explored 0 nodes (4290 simplex iterations) in 1.42 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.160400000000e+04, best bound 5.160400000000e+04, gap 0.0%