Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:01:42 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 3.878321e+04, 2456 iterations, 0.54 seconds

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

     0     0 38783.2057    0   38          - 38783.2057     -      -    0s
H    0     0                    49783.000000 38783.2057  22.1%     -    1s
     0     0 45899.0571    0    3 49783.0000 45899.0571  7.80%     -    1s
H    0     0                    47770.125000 45899.0571  3.92%     -    1s
H    0     0                    47070.000000 45899.0571  2.49%     -    1s
H    0     0                    46020.000000 45899.0571  0.26%     -    1s
     0     0 45905.8429    0    2 46020.0000 45905.8429  0.25%     -    1s
     0     0 45980.0909    0    1 46020.0000 45980.0909  0.09%     -    1s

Cutting planes:
  Implied bound: 37

Explored 0 nodes (3832 simplex iterations) in 1.97 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.602000000000e+04, best bound 4.602000000000e+04, gap 0.0%