Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:12:28 2013

Optimize a model with 561 rows, 26061 columns and 52071 nonzeros
Presolve time: 0.04s
Presolved: 561 rows, 26061 columns, 52071 nonzeros
Variable types: 26010 continuous, 51 integer (51 binary)

Root relaxation: objective 5.112012e+04, 971 iterations, 0.02 seconds

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

     0     0 51120.1162    0    9          - 51120.1162     -      -    0s
H    0     0                    54126.000000 51120.1162  5.55%     -    0s
     0     0 51490.6415    0    5 54126.0000 51490.6415  4.87%     -    0s
H    0     0                    53367.616333 51490.6415  3.52%     -    0s
H    0     0                    52576.000000 51490.6415  2.06%     -    0s
H    0     0                    51626.000000 51490.6415  0.26%     -    0s
     0     0 51508.3695    0    4 51626.0000 51508.3695  0.23%     -    0s
     0     0 51508.3695    0    9 51626.0000 51508.3695  0.23%     -    0s
     0     0 51508.3695    0    5 51626.0000 51508.3695  0.23%     -    0s
     0     0 51508.3695    0    4 51626.0000 51508.3695  0.23%     -    0s
     0     0 51511.2584    0    4 51626.0000 51511.2584  0.22%     -    0s
     0     0 51511.6919    0    4 51626.0000 51511.6919  0.22%     -    0s
     0     0 51517.2463    0    3 51626.0000 51517.2463  0.21%     -    0s
     0     2 51522.1158    0    3 51626.0000 51522.1158  0.20%     -    0s

Cutting planes:
  Implied bound: 79
  Flow cover: 1

Explored 9 nodes (2322 simplex iterations) in 0.62 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.162600000000e+04, best bound 5.162600000000e+04, gap 0.0%