Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:51:53 2013

Optimize a model with 4240 rows, 4040 columns and 16040 nonzeros
Presolve removed 20 rows and 0 columns
Presolve time: 0.02s
Presolved: 4220 rows, 4040 columns, 16020 nonzeros
Variable types: 4020 continuous, 20 integer (20 binary)

Root relaxation: objective 1.864284e+04, 690 iterations, 0.03 seconds

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

     0     0 18642.8409    0   14          - 18642.8409     -      -    0s
H    0     0                    19902.000000 18642.8409  6.33%     -    0s
*    0     0               0    19465.000000 19465.0000   0.0%     -    0s

Cutting planes:
  Gomory: 10
  Implied bound: 14

Explored 0 nodes (825 simplex iterations) in 0.13 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.946500000000e+04, best bound 1.946500000000e+04, gap 0.0%