Gurobi 5.0.1 (linux64) logging started Sat Dec  8 03:33:12 2012

Optimize a model with 1635 rows, 1620 columns and 5890 nonzeros
Presolve removed 208 rows and 76 columns
Presolve time: 0.02s
Presolved: 1427 rows, 1544 columns, 5451 nonzeros
Variable types: 1373 continuous, 171 integer (171 binary)

Root relaxation: objective 5.596547e+04, 262 iterations, 0.00 seconds

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

     0     0 55965.4664    0   14          - 55965.4664     -      -    0s
H    0     0                    58701.000000 55965.4664  4.66%     -    0s
H    0     0                    56797.000000 55965.4664  1.46%     -    0s
     0     0 55973.4786    0   28 56797.0000 55973.4786  1.45%     -    0s
     0     0 55973.5207    0   29 56797.0000 55973.5207  1.45%     -    0s
     0     2 55978.1045    0   29 56797.0000 55978.1045  1.44%     -    0s
H   27    19                    56269.000000 56029.2460  0.43%   8.4    0s

Cutting planes:
  Gomory: 4
  Flow cover: 7

Explored 304 nodes (2261 simplex iterations) in 0.29 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.626900000000e+04, best bound 5.626900000000e+04, gap 0.0%