Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:54:30 2013

Optimize a model with 352 rows, 10272 columns and 20512 nonzeros
Presolve time: 0.01s
Presolved: 352 rows, 10272 columns, 20512 nonzeros
Variable types: 10240 continuous, 32 integer (32 binary)

Root relaxation: objective 3.098488e+04, 382 iterations, 0.01 seconds

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

     0     0 30984.8795    0    6          - 30984.8795     -      -    0s
H    0     0                    31344.000000 30984.8795  1.15%     -    0s
     0     0 31186.7900    0    3 31344.0000 31186.7900  0.50%     -    0s
H    0     0                    31335.000000 31186.7900  0.47%     -    0s
     0     0 31194.0880    0    3 31335.0000 31194.0880  0.45%     -    0s
H    0     0                    31291.000000 31194.0880  0.31%     -    0s
     0     0 31195.2323    0    3 31291.0000 31195.2323  0.31%     -    0s
     0     0 31196.4072    0    3 31291.0000 31196.4072  0.30%     -    0s
     0     0 31196.4144    0    3 31291.0000 31196.4144  0.30%     -    0s
     0     0 31197.4047    0    3 31291.0000 31197.4047  0.30%     -    0s
     0     0 31197.6200    0    3 31291.0000 31197.6200  0.30%     -    0s
     0     0 31197.9709    0    3 31291.0000 31197.9709  0.30%     -    0s
     0     0 31198.2039    0    2 31291.0000 31198.2039  0.30%     -    0s
     0     2 31204.5714    0    2 31291.0000 31204.5714  0.28%     -    0s
H    3     2                    31253.000000 31222.8696  0.10%   8.0    0s
*    4     0               4    31223.000000 31223.0000   0.0%  11.0    0s

Cutting planes:
  Implied bound: 40
  Flow cover: 6

Explored 5 nodes (517 simplex iterations) in 0.23 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.122300000000e+04, best bound 3.122300000000e+04, gap 0.0%