Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:51:52 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 1.781651e+04, 589 iterations, 0.02 seconds

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

     0     0 17816.5141    0   14          - 17816.5141     -      -    0s
H    0     0                    18605.000000 17816.5141  4.24%     -    0s
     0     0 18387.3750    0    1 18605.0000 18387.3750  1.17%     -    0s
H    0     0                    18408.180556 18387.3750  0.11%     -    0s
H    0     0                    18390.000000 18387.3750  0.01%     -    0s
*    0     0               0    18389.000000 18389.0000   0.0%     -    0s

Cutting planes:
  Implied bound: 11

Explored 0 nodes (704 simplex iterations) in 0.12 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.838900000000e+04, best bound 1.838900000000e+04, gap 0.0%