Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:11:29 2013

Optimize a model with 25600 rows, 25100 columns and 100100 nonzeros
Presolve removed 50 rows and 0 columns
Presolve time: 0.11s
Presolved: 25550 rows, 25100 columns, 100050 nonzeros
Variable types: 25050 continuous, 50 integer (50 binary)

Root relaxation: objective 4.351638e+04, 3413 iterations, 1.10 seconds

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

     0     0 43516.3829    0   42          - 43516.3829     -      -    1s
H    0     0                    59352.000000 43516.3829  26.7%     -    1s
     0     0 50278.9502    0   12 59352.0000 50278.9502  15.3%     -    2s
H    0     0                    55577.085616 50278.9502  9.53%     -    2s
H    0     0                    52664.000000 50278.9502  4.53%     -    3s
     0     0 50681.3396    0    5 52664.0000 50681.3396  3.76%     -    3s
H    0     0                    52302.000000 50681.3396  3.10%     -    3s
     0     2 50681.5360    0    5 52302.0000 50681.5360  3.10%     -    3s
H    6     6                    52144.206897 50759.1955  2.66%  67.7    4s
*    7     6               6    50780.000000 50759.1955  0.04%  63.9    4s

Cutting planes:
  Implied bound: 42

Explored 19 nodes (6358 simplex iterations) in 4.55 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.078000000000e+04, best bound 5.077628403546e+04, gap 0.0073%