Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:02:00 2013

Optimize a model with 19006 rows, 18576 columns and 74046 nonzeros
Presolve removed 43 rows and 0 columns
Presolve time: 0.08s
Presolved: 18963 rows, 18576 columns, 74003 nonzeros
Variable types: 18533 continuous, 43 integer (43 binary)

Root relaxation: objective 4.006382e+04, 2361 iterations, 0.60 seconds

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

     0     0 40063.8227    0   36          - 40063.8227     -      -    0s
H    0     0                    49483.000000 40063.8227  19.0%     -    0s
     0     0 45412.0957    0    8 49483.0000 45412.0957  8.23%     -    1s
H    0     0                    48679.000000 45412.0957  6.71%     -    1s
H    0     0                    45923.000000 45412.0957  1.11%     -    1s
     0     0 45655.8402    0    3 45923.0000 45655.8402  0.58%     -    1s
H    0     0                    45736.000000 45655.8402  0.18%     -    1s
     0     0 45694.3671    0    4 45736.0000 45694.3671  0.09%     -    2s
     0     0 45694.4538    0    3 45736.0000 45694.4538  0.09%     -    2s
H    0     0                    45715.000000 45694.4538  0.04%     -    2s
     0     1 45709.1111    0    2 45715.0000 45709.1111  0.01%     -    2s

Cutting planes:
  Implied bound: 34

Explored 2 nodes (4004 simplex iterations) in 2.38 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.571500000000e+04, best bound 4.571183333333e+04, gap 0.0069%