Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:24:10 2013

Optimize a model with 32032 rows, 31472 columns and 125552 nonzeros
Presolve removed 56 rows and 0 columns
Presolve time: 0.14s
Presolved: 31976 rows, 31472 columns, 125496 nonzeros
Variable types: 31416 continuous, 56 integer (56 binary)

Root relaxation: objective 5.077085e+04, 5582 iterations, 2.50 seconds

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

     0     0 50770.8502    0   50          - 50770.8502     -      -    2s
H    0     0                    73566.000000 50770.8502  31.0%     -    4s
     0     0 61008.2238    0    7 73566.0000 61008.2238  17.1%     -    6s
H    0     0                    65499.361447 61008.2238  6.86%     -    6s
H    0     0                    63663.000000 61008.2238  4.17%     -    6s
     0     0 61679.3600    0    5 63663.0000 61679.3600  3.12%     -    7s
H    0     0                    63606.513121 61679.3600  3.03%     -    7s
H    0     0                    62731.000000 61679.3600  1.68%     -    7s
     0     0 61698.9521    0    4 62731.0000 61698.9521  1.65%     -    7s
     0     2 61700.0021    0    4 62731.0000 61700.0021  1.64%     -    7s
H    2     2                    62270.000000 61769.1733  0.80%  39.0    8s
H    4     4                    62147.405229 61784.7213  0.58%   190    8s
H    8     7                    62052.217822 61811.3376  0.39%   171    8s
H   10     9                    61982.000000 61811.3376  0.28%   157    8s
*   12     8               9    61962.000000 61811.3376  0.24%   135    8s
*   17     2               4    61889.000000 61844.0000  0.07%   126    8s

Cutting planes:
  Implied bound: 49

Explored 19 nodes (11494 simplex iterations) in 8.92 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.188900000000e+04, best bound 6.188900000000e+04, gap 0.0%