Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:02:50 2013

Optimize a model with 28 rows, 446 columns and 1288 nonzeros
Presolve removed 22 rows and 24 columns
Presolve time: 0.00s
Presolved: 6 rows, 422 columns, 842 nonzeros
Variable types: 422 continuous, 0 integer (0 binary)

Root relaxation: objective 3.881594e+03, 7 iterations, 0.00 seconds

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

     0     0 3881.59364    0    1          - 3881.59364     -      -    0s
     0     2 3881.59364    0    1          - 3881.59364     -      -    0s
*   15     3               8    3893.8998644 3893.89904  0.00%   1.1    0s

Explored 16 nodes (23 simplex iterations) in 0.01 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.893899864364e+03, best bound 3.893899044453e+03, gap 0.0000%