Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:23:35 2013

Optimize a model with 32032 rows, 31472 columns and 125552 nonzeros
Presolve removed 56 rows and 0 columns
Presolve time: 0.14s
Presolved: 31976 rows, 31472 columns, 125496 nonzeros
Variable types: 31416 continuous, 56 integer (56 binary)

Root relaxation: objective 4.927796e+04, 4718 iterations, 2.27 seconds

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

     0     0 49277.9564    0   50          - 49277.9564     -      -    2s
H    0     0                    66923.000000 49277.9564  26.4%     -    3s
     0     0 59652.9893    0    7 66923.0000 59652.9893  10.9%     -    5s
H    0     0                    64325.993057 59652.9893  7.26%     -    5s
H    0     0                    62142.000000 59652.9893  4.01%     -    5s
     0     0 60299.0835    0    5 62142.0000 60299.0835  2.97%     -    6s
H    0     0                    61097.000000 60299.0835  1.31%     -    6s
H    0     0                    60389.000000 60299.0835  0.15%     -    6s
     0     0 60309.3423    0    2 60389.0000 60309.3423  0.13%     -    6s
     0     2 60314.3799    0    2 60389.0000 60314.3799  0.12%     -    6s

Cutting planes:
  Implied bound: 52

Explored 3 nodes (8045 simplex iterations) in 7.03 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.038900000000e+04, best bound 6.038900000000e+04, gap 0.0%