Gurobi 5.0.1 (linux64) logging started Wed Nov 28 11:44:24 2012

Optimize a model with 4971 rows, 9660 columns and 28773 nonzeros
Presolve removed 69 rows and 69 columns
Presolve time: 0.11s
Presolved: 4902 rows, 9591 columns, 28635 nonzeros
Variable types: 4761 continuous, 4830 integer (4830 binary)
Found heuristic solution: objective 87817.000000
Found heuristic solution: objective 48400.000000

Root relaxation: objective 3.825142e+04, 11023 iterations, 0.93 seconds

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

     0     0 38251.4191    0   66 48400.0000 38251.4191  21.0%     -    1s
     0     0 38289.5333    0   65 48400.0000 38289.5333  20.9%     -    1s
     0     0 38400.3276    0   73 48400.0000 38400.3276  20.7%     -    1s
H    0     0                    39828.000000 38400.3276  3.58%     -    2s
     0     0 38400.3948    0   85 39828.0000 38400.3948  3.58%     -    2s
     0     0 38400.3948    0   85 39828.0000 38400.3948  3.58%     -    3s
H    0     0                    39266.000000 38400.3948  2.20%     -    4s
H    0     0                    38984.000000 38400.3948  1.50%     -    4s
     0     2 38410.0882    0   85 38984.0000 38410.0882  1.47%     -    4s
     4     6 38472.9069    3   44 38984.0000 38454.0575  1.36%   388    5s
H   27     8                    38737.000000 38454.0575  0.73%   119    6s
H   59    14                    38675.000000 38500.6939  0.45%  91.1    7s
H  144    48                    38673.000000 38503.5754  0.44%  50.1    8s
   269    47 38579.7908   36   51 38673.0000 38527.0495  0.38%  60.1   10s

Cutting planes:
  Gomory: 5
  Implied bound: 90
  Flow cover: 69

Explored 425 nodes (35231 simplex iterations) in 11.06 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.867300000000e+04, best bound 3.867100000000e+04, gap 0.0052%