Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:03:44 2013

Optimize a model with 20790 rows, 20340 columns and 81090 nonzeros
Presolve removed 45 rows and 0 columns
Presolve time: 0.09s
Presolved: 20745 rows, 20340 columns, 81045 nonzeros
Variable types: 20295 continuous, 45 integer (45 binary)

Root relaxation: objective 3.955192e+04, 2332 iterations, 0.63 seconds

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

     0     0 39551.9207    0   35          - 39551.9207     -      -    0s
H    0     0                    51247.000000 39551.9207  22.8%     -    1s
     0     0 47363.0409    0    7 51247.0000 47363.0409  7.58%     -    2s
H    0     0                    49198.000000 47363.0409  3.73%     -    2s
H    0     0                    47798.000000 47363.0409  0.91%     -    2s
     0     0 47687.5336    0    3 47798.0000 47687.5336  0.23%     -    2s
     0     0 47795.3066    0    2 47798.0000 47795.3066  0.01%     -    2s

Cutting planes:
  Implied bound: 38

Explored 0 nodes (4473 simplex iterations) in 2.68 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.779800000000e+04, best bound 4.779530655462e+04, gap 0.0056%