Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:20:33 2013

Optimize a model with 605 rows, 30305 columns and 60555 nonzeros
Presolve time: 0.04s
Presolved: 605 rows, 30305 columns, 60555 nonzeros
Variable types: 30250 continuous, 55 integer (55 binary)

Root relaxation: objective 5.503375e+04, 1021 iterations, 0.02 seconds

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

     0     0 55033.7517    0   10          - 55033.7517     -      -    0s
H    0     0                    58788.000000 55033.7517  6.39%     -    0s
H    0     0                    56057.000000 55033.7517  1.83%     -    0s
     0     0 55485.3948    0    9 56057.0000 55485.3948  1.02%     -    0s
     0     0 55530.7247    0    8 56057.0000 55530.7247  0.94%     -    0s
H    0     0                    55702.000000 55530.7247  0.31%     -    0s
     0     0 55531.7675    0    7 55702.0000 55531.7675  0.31%     -    0s
     0     0 55532.2136    0    8 55702.0000 55532.2136  0.30%     -    0s
     0     0 55533.2623    0    6 55702.0000 55533.2623  0.30%     -    0s
     0     0 55533.4850    0    7 55702.0000 55533.4850  0.30%     -    0s
     0     0 55558.3220    0    8 55702.0000 55558.3220  0.26%     -    0s
     0     0 55559.4717    0    7 55702.0000 55559.4717  0.26%     -    0s
H    0     0                    55635.000000 55559.4717  0.14%     -    0s
     0     0 55559.4717    0    8 55635.0000 55559.4717  0.14%     -    0s
     0     0 55559.4717    0    6 55635.0000 55559.4717  0.14%     -    0s
     0     0 55568.8178    0    5 55635.0000 55568.8178  0.12%     -    0s
     0     0 55573.8395    0    5 55635.0000 55573.8395  0.11%     -    0s
     0     0 55574.0923    0    3 55635.0000 55574.0923  0.11%     -    0s
     0     0 55574.0923    0    3 55635.0000 55574.0923  0.11%     -    0s
     0     0 55574.3766    0    3 55635.0000 55574.3766  0.11%     -    0s
     0     0 55574.6808    0    2 55635.0000 55574.6808  0.11%     -    1s
     0     0 55589.4339    0    3 55635.0000 55589.4339  0.08%     -    1s
     0     0 55610.9176    0    2 55635.0000 55610.9176  0.04%     -    1s
     0     0 55617.5300    0    3 55635.0000 55617.5300  0.03%     -    1s
     0     0 55617.5798    0    3 55635.0000 55617.5798  0.03%     -    1s
     0     0 55618.0588    0    1 55635.0000 55618.0588  0.03%     -    1s
H    0     0                    55621.000000 55618.0588  0.01%     -    1s

Cutting planes:
  Implied bound: 50
  Flow cover: 1

Explored 0 nodes (2454 simplex iterations) in 1.17 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.562100000000e+04, best bound 5.561805882353e+04, gap 0.0053%