Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:53:20 2013

Optimize a model with 57075 rows, 56325 columns and 225075 nonzeros
Presolve removed 3574 rows and 0 columns
Presolve time: 0.35s
Presolved: 53501 rows, 56325 columns, 217927 nonzeros
Variable types: 56250 continuous, 75 integer (75 binary)

Root relaxation: objective 7.461369e+04, 9905 iterations, 2.01 seconds

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

     0     0 74613.6883    0    1          - 74613.6883     -      -    2s
H    0     0                    74764.000000 74613.6883  0.20%     -    2s
H    0     0                    74685.000000 74613.6883  0.10%     -    2s
     0     0 74614.5381    0    2 74685.0000 74614.5381  0.09%     -    3s
     0     0 74614.5381    0    1 74685.0000 74614.5381  0.09%     -    4s
     0     0 74614.6110    0    2 74685.0000 74614.6110  0.09%     -    4s
     0     0 74616.3750    0    2 74685.0000 74616.3750  0.09%     -    4s
     0     0 74616.5461    0    2 74685.0000 74616.5461  0.09%     -    4s
     0     0 74671.8766    0    2 74685.0000 74671.8766  0.02%     -    4s
     0     0 74672.2302    0    1 74685.0000 74672.2302  0.02%     -    4s
     0     2 74676.6244    0    1 74685.0000 74676.6244  0.01%     -    5s

Cutting planes:
  Gomory: 1

Explored 2 nodes (12437 simplex iterations) in 5.51 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.468500000000e+04, best bound 7.468423015873e+04, gap 0.0010%