Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:15:37 2013

Optimize a model with 28 rows, 66 columns and 148 nonzeros
Presolve removed 22 rows and 24 columns
Presolve time: 0.00s
Presolved: 6 rows, 42 columns, 82 nonzeros
Variable types: 42 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
H    0     0                    3893.6704832 3881.59364  0.31%     -    0s
     0     2 3881.59364    0    1 3893.67048 3881.59364  0.31%     -    0s

Explored 7 nodes (9 simplex iterations) in 0.00 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.893670483195e+03, best bound 3.893305894864e+03, gap 0.0094%