Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:34:24 2013

Optimize a model with 36720 rows, 36120 columns and 144120 nonzeros
Presolve removed 60 rows and 0 columns
Presolve time: 0.16s
Presolved: 36660 rows, 36120 columns, 144060 nonzeros
Variable types: 36060 continuous, 60 integer (60 binary)

Root relaxation: objective 4.923558e+04, 4203 iterations, 1.93 seconds

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

     0     0 49235.5761    0   49          - 49235.5761     -      -    2s
H    0     0                    70040.000000 49235.5761  29.7%     -    3s
     0     0 58723.7572    0   12 70040.0000 58723.7572  16.2%     -    6s
H    0     0                    63460.000000 58723.7572  7.46%     -    6s
     0     0 59606.6456    0    4 63460.0000 59606.6456  6.07%     -    7s
H    0     0                    63010.110389 59606.6456  5.40%     -    7s
H    0     0                    61982.000000 59606.6456  3.83%     -    7s
     0     0 59636.2586    0    3 61982.0000 59636.2586  3.78%     -    7s
H    0     0                    61641.367868 59636.2586  3.25%     -    7s
H    0     0                    60917.000000 59636.2586  2.10%     -    7s
     0     0 59636.2586    0    3 60917.0000 59636.2586  2.10%     -    8s
     0     2 59640.5694    0    3 60917.0000 59640.5694  2.10%     -    8s
H    2     2                    59774.146253 59716.1545  0.10%   108    8s
H    4     1                    59769.194444 59755.2778  0.02%   135    8s
*    5     1               4    59757.000000 59757.0000   0.0%   115    8s

Cutting planes:
  Implied bound: 57

Explored 6 nodes (8867 simplex iterations) in 8.97 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.975700000000e+04, best bound 5.975700000000e+04, gap 0.0%