Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:44:51 2013

Optimize a model with 40446 rows, 39816 columns and 158886 nonzeros
Presolve removed 63 rows and 0 columns
Presolve time: 0.18s
Presolved: 40383 rows, 39816 columns, 158823 nonzeros
Variable types: 39753 continuous, 63 integer (63 binary)

Root relaxation: objective 5.151686e+04, 5175 iterations, 2.90 seconds

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

     0     0 51516.8573    0   54          - 51516.8573     -      -    3s
H    0     0                    79837.000000 51516.8573  35.5%     -    5s
     0     0 62044.1542    0   12 79837.0000 62044.1542  22.3%     -    9s
H    0     0                    76307.287705 62044.1542  18.7%     -    9s
H    0     0                    67660.000000 62044.1542  8.30%     -    9s
     0     0 63280.6512    0    4 67660.0000 63280.6512  6.47%     -   10s
H    0     0                    67291.295286 63280.6512  5.96%     -   10s
H    0     0                    66147.000000 63280.6512  4.33%     -   10s
H    0     0                    63359.000000 63280.6512  0.12%     -   10s
     0     0 63345.2703    0    2 63359.0000 63345.2703  0.02%     -   10s
     0     0 63346.9032    0    1 63359.0000 63346.9032  0.02%     -   11s
     0     0 63346.9032    0   41 63359.0000 63346.9032  0.02%     -   13s
     0     0 63346.9032    0    7 63359.0000 63346.9032  0.02%     -   16s
     0     0 63346.9032    0    2 63359.0000 63346.9032  0.02%     -   17s
     0     0 63346.9032    0    1 63359.0000 63346.9032  0.02%     -   17s

Cutting planes:
  Gomory: 2
  Implied bound: 43

Explored 0 nodes (16040 simplex iterations) in 17.31 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.335900000000e+04, best bound 6.335900000000e+04, gap 0.0%