Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:20:06 2013

Optimize a model with 49840 rows, 49140 columns and 196140 nonzeros
Presolve removed 70 rows and 0 columns
Presolve time: 0.22s
Presolved: 49770 rows, 49140 columns, 196070 nonzeros
Variable types: 49070 continuous, 70 integer (70 binary)

Root relaxation: objective 5.200239e+04, 5253 iterations, 2.49 seconds

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

     0     0 52002.3918    0   50          - 52002.3918     -      -    2s
H    0     0                    76271.000000 52002.3918  31.8%     -    3s
H    0     0                    64460.000000 52002.3918  19.3%     -   12s
     0     0 61505.7724    0   16 64460.0000 61505.7724  4.58%     -   17s
     0     0 62671.5643    0    7 64460.0000 62671.5643  2.77%     -   18s
     0     0 62909.7676    0    3 64460.0000 62909.7676  2.40%     -   19s
     0     0 62916.7619    0    1 64460.0000 62916.7619  2.39%     -   19s
     0     2 62917.0222    0    1 64460.0000 62917.0222  2.39%     -   20s
H    2     2                    63681.944954 62919.2477  1.20%  33.0   20s
H    7     2                    62982.000000 62928.0000  0.09%  31.7   21s
H   18     0                    62951.853211 62943.1927  0.01%  77.3   22s

Cutting planes:
  Implied bound: 66

Explored 20 nodes (12194 simplex iterations) in 22.13 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.295185321101e+04, best bound 6.294800000000e+04, gap 0.0061%