Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:23:13 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 4.499202e+04, 3419 iterations, 1.13 seconds

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

     0     0 44992.0203    0   44          - 44992.0203     -      -    1s
H    0     0                    60243.000000 44992.0203  25.3%     -    1s
     0     0 53177.9906    0    7 60243.0000 53177.9906  11.7%     -    4s
H    0     0                    59396.344583 53177.9906  10.5%     -    4s
H    0     0                    57611.000000 53177.9906  7.69%     -    4s
H    0     0                    53548.000000 53177.9906  0.69%     -    4s
     0     0 53497.1426    0    2 53548.0000 53497.1426  0.09%     -    4s
     0     0 53508.4658    0    1 53548.0000 53508.4658  0.07%     -    4s
     0     2 53517.1852    0    1 53548.0000 53517.1852  0.06%     -    5s

Cutting planes:
  Implied bound: 44

Explored 2 nodes (6151 simplex iterations) in 5.08 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.354800000000e+04, best bound 5.354434782609e+04, gap 0.0068%