Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:09:02 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 5.562145e+04, 1158 iterations, 0.03 seconds

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

     0     0 55621.4463    0    5          - 55621.4463     -      -    0s
H    0     0                    56868.000000 55621.4463  2.19%     -    0s
H    0     0                    55975.000000 55621.4463  0.63%     -    0s
     0     0 55762.1684    0    4 55975.0000 55762.1684  0.38%     -    0s
     0     0 55776.2261    0    3 55975.0000 55776.2261  0.36%     -    0s
     0     0 55779.2473    0    3 55975.0000 55779.2473  0.35%     -    0s
     0     0 55779.2473    0    5 55975.0000 55779.2473  0.35%     -    0s
     0     0 55779.2473    0    4 55975.0000 55779.2473  0.35%     -    0s
     0     0 55779.2473    0    3 55975.0000 55779.2473  0.35%     -    0s
     0     0 55779.2473    0    3 55975.0000 55779.2473  0.35%     -    0s
     0     0 55779.2473    0    3 55975.0000 55779.2473  0.35%     -    0s
H    0     0                    55924.000000 55779.2473  0.26%     -    0s
     0     2 55800.7302    0    3 55924.0000 55800.7302  0.22%     -    0s

Cutting planes:
  Implied bound: 50
  Flow cover: 5

Explored 7 nodes (2485 simplex iterations) in 0.60 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.592400000000e+04, best bound 5.592400000000e+04, gap 0.0%