Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:52:29 2013

Optimize a model with 11521 rows, 1681 columns and 35301 nonzeros
Presolve removed 2075 rows and 880 columns
Presolve time: 0.07s
Presolved: 9446 rows, 801 columns, 28907 nonzeros
Variable types: 15 continuous, 786 integer (786 binary)
Found heuristic solution: objective 41120.000000

Root relaxation: objective 3.155125e+04, 2362 iterations, 0.08 seconds

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

     0     0 31551.2500    0    4 41120.0000 31551.2500  23.3%     -    0s
H    0     0                    31557.000000 31551.2500  0.02%     -    0s
     0     0 31551.5896    0   16 31557.0000 31551.5896  0.02%     -    0s
     0     0 31551.5896    0    4 31557.0000 31551.5896  0.02%     -    0s
     0     0 31551.7489    0   17 31557.0000 31551.7489  0.02%     -    0s
     0     2 31552.2481    0   17 31557.0000 31552.2481  0.02%     -    0s
H    5     5                    31556.000000 31552.9688  0.01%   0.0    0s

Cutting planes:
  Gomory: 1
  Cover: 1
  MIR: 6

Explored 5 nodes (2552 simplex iterations) in 0.25 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.155600000000e+04, best bound 3.155300000000e+04, gap 0.0095%