Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:09:11 2013

Optimize a model with 539 rows, 24059 columns and 48069 nonzeros
Presolve time: 0.03s
Presolved: 539 rows, 24059 columns, 48069 nonzeros
Variable types: 24010 continuous, 49 integer (49 binary)

Root relaxation: objective 5.644466e+04, 1011 iterations, 0.03 seconds

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

     0     0 56444.6630    0    6          - 56444.6630     -      -    0s
H    0     0                    57617.000000 56444.6630  2.03%     -    0s
     0     0 56818.4646    0    5 57617.0000 56818.4646  1.39%     -    0s
H    0     0                    56977.000000 56818.4646  0.28%     -    0s
     0     0 56845.1721    0    4 56977.0000 56845.1721  0.23%     -    0s
     0     0 56845.1721    0    6 56977.0000 56845.1721  0.23%     -    0s
     0     0 56845.1721    0    5 56977.0000 56845.1721  0.23%     -    0s
     0     0 56845.1721    0    4 56977.0000 56845.1721  0.23%     -    0s
     0     0 56845.2493    0    3 56977.0000 56845.2493  0.23%     -    0s
H    0     0                    56923.000000 56845.2493  0.14%     -    0s
H    0     0                    56861.000000 56845.2493  0.03%     -    0s
     0     0 infeasible    0      56861.0000 56861.0000   0.0%     -    0s

Cutting planes:
  Implied bound: 49
  Flow cover: 4

Explored 1 nodes (1963 simplex iterations) in 0.49 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.686100000000e+04, best bound 5.686100000000e+04, gap 0.0%