Gurobi 5.0.1 (linux64) logging started Mon Feb  4 16:55:52 2013

Optimize a model with 4089 rows, 841 columns and 12615 nonzeros
Presolve removed 709 rows and 434 columns
Presolve time: 0.04s
Presolved: 3380 rows, 407 columns, 10449 nonzeros
Variable types: 12 continuous, 395 integer (395 binary)
Found heuristic solution: objective 18505.000000
Found heuristic solution: objective 16603.000000

Root relaxation: objective 1.343088e+04, 1859 iterations, 0.04 seconds

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

     0     0 13430.8800    0    8 16603.0000 13430.8800  19.1%     -    0s
H    0     0                    13457.000000 13430.8800  0.19%     -    0s
H    0     0                    13447.000000 13430.8800  0.12%     -    0s
H    0     0                    13442.000000 13430.8800  0.08%     -    0s
     0     0 13431.0000    0   17 13442.0000 13431.0000  0.08%     -    0s
     0     0 13431.0000    0   10 13442.0000 13431.0000  0.08%     -    0s
     0     0 13431.0126    0   20 13442.0000 13431.0126  0.08%     -    0s
     0     1 13431.0344    0   20 13442.0000 13431.0344  0.08%     -    0s
H    9     7                    13441.000000 13433.5120  0.06%   0.0    0s
H   37     8                    13440.000000 13434.4654  0.04%  10.6    0s
*   80     8              27    13438.000000 13435.2836  0.02%   7.3    0s

Cutting planes:
  Gomory: 5
  Cover: 1
  MIR: 24
  Zero half: 3
  Mod-K: 1

Explored 104 nodes (2857 simplex iterations) in 0.21 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.343800000000e+04, best bound 1.343700000000e+04, gap 0.0074%