Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:41:16 2013

Optimize a model with 54166 rows, 53436 columns and 213306 nonzeros
Presolve removed 73 rows and 0 columns
Presolve time: 0.24s
Presolved: 54093 rows, 53436 columns, 213233 nonzeros
Variable types: 53363 continuous, 73 integer (73 binary)

Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
    6962    5.8609251e+04   5.221925e+04   0.000000e+00      5s
    7125    5.8618528e+04   0.000000e+00   0.000000e+00      5s

Root relaxation: objective 5.861853e+04, 7125 iterations, 5.32 seconds

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

     0     0 58618.5278    0   60          - 58618.5278     -      -    5s
H    0     0                    94026.000000 58618.5278  37.7%     -    8s
     0     0 71205.1260    0   14 94026.0000 71205.1260  24.3%     -   15s
H    0     0                    83737.021317 71205.1260  15.0%     -   15s
H    0     0                    78737.000000 71205.1260  9.57%     -   15s
     0     0 73115.0829    0    5 78737.0000 73115.0829  7.14%     -   16s
H    0     0                    78606.000000 73115.0829  6.99%     -   17s
     0     0 73314.3642    0    5 78606.0000 73314.3642  6.73%     -   17s
H    0     0                    73491.000000 73314.3642  0.24%     -   18s
     0     0 73349.5335    0    2 73491.0000 73349.5335  0.19%     -   18s
     0     0 73371.2000    0    2 73491.0000 73371.2000  0.16%     -   18s
     0     2 73373.1887    0    2 73491.0000 73373.1887  0.16%     -   20s
*    4     2               4    73424.000000 73412.6256  0.02%  68.5   20s

Cutting planes:
  Implied bound: 69

Explored 7 nodes (14815 simplex iterations) in 20.49 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.342400000000e+04, best bound 7.342400000000e+04, gap 0.0%