Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:18:08 2013

Optimize a model with 49770 rows, 49070 columns and 196070 nonzeros
Presolve removed 1929 rows and 0 columns
Presolve time: 0.30s
Presolved: 47841 rows, 49070 columns, 192212 nonzeros
Variable types: 49000 continuous, 70 integer (70 binary)

Root relaxation: objective 6.291676e+04, 8209 iterations, 1.59 seconds

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

     0     0 62916.7619    0    1          - 62916.7619     -      -    2s
H    0     0                    63382.000000 62916.7619  0.73%     -    2s
     0     2 62916.7712    0    1 63382.0000 62916.7712  0.73%     -    3s
H    5     2                    62982.000000 62930.0000  0.08%  38.6    3s
*    9     2               7    62953.000000 62948.0000  0.01%  68.4    4s

Explored 10 nodes (8825 simplex iterations) in 4.28 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.295300000000e+04, best bound 6.294800000000e+04, gap 0.0079%