Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:51:56 2013

Optimize a model with 4641 rows, 4431 columns and 17661 nonzeros
Presolve removed 276 rows and 0 columns
Presolve time: 0.03s
Presolved: 4365 rows, 4431 columns, 17109 nonzeros
Variable types: 4410 continuous, 21 integer (21 binary)

Root relaxation: objective 1.799827e+04, 437 iterations, 0.02 seconds

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

     0     0 17998.2745    0    4          - 17998.2745     -      -    0s
H    0     0                    18091.000000 17998.2745  0.51%     -    0s
H    0     0                    18047.000000 17998.2745  0.27%     -    0s
     0     0 18014.0899    0    4 18047.0000 18014.0899  0.18%     -    0s
H    0     0                    18016.000000 18014.0899  0.01%     -    0s
     0     0     cutoff    0      18016.0000 18016.0000   0.0%     -    0s

Cutting planes:
  Gomory: 2

Explored 0 nodes (501 simplex iterations) in 0.10 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.801600000000e+04, best bound 1.801600000000e+04, gap 0.0%