Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:51:51 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 1.954964e+04, 521 iterations, 0.02 seconds

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

     0     0 19549.6434    0   15          - 19549.6434     -      -    0s
H    0     0                    20332.000000 19549.6434  3.85%     -    0s
     0     0 19927.7143    0    1 20332.0000 19927.7143  1.99%     -    0s
H    0     0                    19945.571429 19927.7143  0.09%     -    0s
H    0     0                    19930.000000 19927.7143  0.01%     -    0s

Cutting planes:
  Implied bound: 13

Explored 0 nodes (606 simplex iterations) in 0.12 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.993000000000e+04, best bound 1.993000000000e+04, gap 0.0%