Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:16:20 2013

Optimize a model with 583 rows, 28143 columns and 56233 nonzeros
Presolve time: 0.04s
Presolved: 583 rows, 28143 columns, 56233 nonzeros
Variable types: 28090 continuous, 53 integer (53 binary)

Root relaxation: objective 5.517558e+04, 1232 iterations, 0.03 seconds

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

     0     0 55175.5849    0    4          - 55175.5849     -      -    0s
H    0     0                    55975.000000 55175.5849  1.43%     -    0s
     0     0 55390.9251    0    3 55975.0000 55390.9251  1.04%     -    0s
H    0     0                    55406.000000 55390.9251  0.03%     -    0s
     0     0 55391.1054    0    3 55406.0000 55391.1054  0.03%     -    0s
     0     0 55391.1054    0    4 55406.0000 55391.1054  0.03%     -    0s
     0     0 55391.1054    0    3 55406.0000 55391.1054  0.03%     -    0s
     0     0 55393.2318    0    3 55406.0000 55393.2318  0.02%     -    0s
     0     0 55397.7631    0    4 55406.0000 55397.7631  0.01%     -    0s
     0     0 55398.5195    0    4 55406.0000 55398.5195  0.01%     -    0s
     0     0 55399.2711    0    4 55406.0000 55399.2711  0.01%     -    0s
     0     0 55399.4562    0    4 55406.0000 55399.4562  0.01%     -    0s
     0     0 55399.4562    0    4 55406.0000 55399.4562  0.01%     -    0s
     0     0     cutoff    0      55406.0000 55406.0000   0.0%     -    0s

Cutting planes:
  Implied bound: 48
  Flow cover: 4

Explored 0 nodes (2068 simplex iterations) in 0.50 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.540600000000e+04, best bound 5.540600000000e+04, gap 0.0%