Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:54:22 2013

Optimize a model with 10592 rows, 10272 columns and 40992 nonzeros
Presolve removed 391 rows and 0 columns
Presolve time: 0.06s
Presolved: 10201 rows, 10272 columns, 40210 nonzeros
Variable types: 10240 continuous, 32 integer (32 binary)

Root relaxation: objective 3.141775e+04, 1390 iterations, 0.07 seconds

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

     0     0 31417.7548    0    3          - 31417.7548     -      -    0s
H    0     0                    31593.000000 31417.7548  0.55%     -    0s
     0     0 31419.8453    0    4 31593.0000 31419.8453  0.55%     -    0s
     0     0 31419.8453    0    4 31593.0000 31419.8453  0.55%     -    0s
     0     2 31419.9470    0    4 31593.0000 31419.9470  0.55%     -    0s
*    3     3               3    31464.000000 31464.0000   0.0%  38.0    0s

Cutting planes:
  Gomory: 1
  Flow cover: 6

Explored 4 nodes (1533 simplex iterations) in 0.47 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.146400000000e+04, best bound 3.146400000000e+04, gap 0.0%