Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:17:13 2013

Optimize a model with 28726 rows, 28196 columns and 112466 nonzeros
Presolve removed 53 rows and 0 columns
Presolve time: 0.13s
Presolved: 28673 rows, 28196 columns, 112413 nonzeros
Variable types: 28143 continuous, 53 integer (53 binary)

Root relaxation: objective 4.634532e+04, 3798 iterations, 1.17 seconds

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

     0     0 46345.3243    0   46          - 46345.3243     -      -    1s
H    0     0                    66981.000000 46345.3243  30.8%     -    1s
     0     0 54590.6858    0    9 66981.0000 54590.6858  18.5%     -    4s
H    0     0                    60208.931454 54590.6858  9.33%     -    4s
H    0     0                    58952.000000 54590.6858  7.40%     -    4s
     0     0 55399.2438    0    4 58952.0000 55399.2438  6.03%     -    4s
H    0     0                    57781.215745 55399.2438  4.12%     -    4s
H    0     0                    57063.000000 55399.2438  2.92%     -    4s
H    0     0                    55406.000000 55399.2438  0.01%     -    4s
     0     0     cutoff    0      55406.0000 55406.0000   0.0%     -    5s

Cutting planes:
  Implied bound: 48

Explored 0 nodes (6952 simplex iterations) in 5.01 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.540600000000e+04, best bound 5.540600000000e+04, gap 0.0%