Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:54:19 2013

Optimize a model with 18472 rows, 2304 columns and 56448 nonzeros
Presolve removed 2275 rows and 1182 columns
Presolve time: 0.14s
Presolved: 16197 rows, 1122 columns, 49446 nonzeros
Variable types: 19 continuous, 1103 integer (1103 binary)
Found heuristic solution: objective 55683.000000

Root relaxation: objective 4.467442e+04, 4367 iterations, 0.24 seconds

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

     0     0 44674.4231    0    7 55683.0000 44674.4231  19.8%     -    0s
H    0     0                    44694.000000 44674.4231  0.04%     -    0s
H    0     0                    44688.000000 44674.4231  0.03%     -    0s
     0     0 44674.7136    0   26 44688.0000 44674.7136  0.03%     -    0s
     0     0 44674.7136    0    8 44688.0000 44674.7136  0.03%     -    0s
     0     0 44675.0064    0   27 44688.0000 44675.0064  0.03%     -    0s
H    0     0                    44687.000000 44675.0064  0.03%     -    0s
     0     2 44675.3736    0   27 44687.0000 44675.3736  0.03%     -    0s
H    5     4                    44683.000000 44676.2004  0.02%   0.8    0s

Cutting planes:
  Gomory: 4
  MIR: 15
  Zero half: 2

Explored 24 nodes (6168 simplex iterations) in 0.82 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.468300000000e+04, best bound 4.468000000000e+04, gap 0.0067%