Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:03:22 2013

Optimize a model with 20745 rows, 20295 columns and 81045 nonzeros
Presolve removed 2602 rows and 0 columns
Presolve time: 0.12s
Presolved: 18143 rows, 20295 columns, 75841 nonzeros
Variable types: 20250 continuous, 45 integer (45 binary)

Root relaxation: objective 3.888720e+04, 2019 iterations, 0.16 seconds

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

     0     0 38887.1968    0    5          - 38887.1968     -      -    0s
H    0     0                    39770.000000 38887.1968  2.22%     -    0s
H    0     0                    38890.000000 38887.1968  0.01%     -    0s

Explored 0 nodes (2019 simplex iterations) in 0.47 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.889000000000e+04, best bound 3.888719675553e+04, gap 0.0072%