Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:10:10 2013

Optimize a model with 47056 rows, 46376 columns and 185096 nonzeros
Presolve removed 68 rows and 0 columns
Presolve time: 0.21s
Presolved: 46988 rows, 46376 columns, 185028 nonzeros
Variable types: 46308 continuous, 68 integer (68 binary)

Root relaxation: objective 5.738523e+04, 5690 iterations, 3.42 seconds

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

     0     0 57385.2282    0   54          - 57385.2282     -      -    3s
H    0     0                    93297.000000 57385.2282  38.5%     -    6s
     0     0 70537.7357    0   18 93297.0000 70537.7357  24.4%     -   12s
H    0     0                    86336.475335 70537.7357  18.3%     -   12s
H    0     0                    78207.000000 70537.7357  9.81%     -   12s
     0     0 72911.9066    0    8 78207.0000 72911.9066  6.77%     -   13s
H    0     0                    77848.000000 72911.9066  6.34%     -   14s
H    0     0                    73037.000000 72911.9066  0.17%     -   14s
     0     0 72918.9745    0    4 73037.0000 72918.9745  0.16%     -   14s
     0     2 72921.6544    0    4 73037.0000 72921.6544  0.16%     -   15s

Cutting planes:
  Implied bound: 64

Explored 10 nodes (13455 simplex iterations) in 16.24 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.303700000000e+04, best bound 7.303700000000e+04, gap 0.0%