Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:09:29 2013

Optimize a model with 24598 rows, 24108 columns and 96138 nonzeros
Presolve removed 49 rows and 0 columns
Presolve time: 0.10s
Presolved: 24549 rows, 24108 columns, 96089 nonzeros
Variable types: 24059 continuous, 49 integer (49 binary)

Root relaxation: objective 4.514083e+04, 3891 iterations, 1.40 seconds

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

     0     0 45140.8311    0   43          - 45140.8311     -      -    1s
H    0     0                    57915.000000 45140.8311  22.1%     -    2s
     0     0 52536.8502    0    3 57915.0000 52536.8502  9.29%     -    3s
H    0     0                    54539.853210 52536.8502  3.67%     -    3s
H    0     0                    52726.000000 52536.8502  0.36%     -    3s
     0     0 52587.7674    0    3 52726.0000 52587.7674  0.26%     -    3s
H    0     0                    52660.000000 52587.7674  0.14%     -    3s
     0     0 52620.2469    0    2 52660.0000 52620.2469  0.08%     -    4s
     0     0 52624.4348    0    1 52660.0000 52624.4348  0.07%     -    4s
     0     2 52627.4561    0    1 52660.0000 52627.4561  0.06%     -    4s
*    2     1               1    52651.000000 52634.0000  0.03%  61.5    4s
*    3     0               2    52634.000000 52634.0000   0.0%  42.0    4s

Cutting planes:
  Gomory: 1
  Implied bound: 43

Explored 4 nodes (5610 simplex iterations) in 4.53 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.263400000000e+04, best bound 5.263400000000e+04, gap 0.0%