Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:04:39 2013

Optimize a model with 506 rows, 21206 columns and 42366 nonzeros
Presolve time: 0.03s
Presolved: 506 rows, 21206 columns, 42366 nonzeros
Variable types: 21160 continuous, 46 integer (46 binary)

Root relaxation: objective 5.646691e+04, 1237 iterations, 0.03 seconds

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

     0     0 56466.9074    0    4          - 56466.9074     -      -    0s
H    0     0                    57953.000000 56466.9074  2.56%     -    0s
H    0     0                    57573.000000 56466.9074  1.92%     -    0s
H    0     0                    57458.000000 56466.9074  1.72%     -    0s
     0     0 56585.0479    0    2 57458.0000 56585.0479  1.52%     -    0s
H    0     0                    56884.073727 56585.0479  0.53%     -    0s
H    0     0                    56648.000000 56585.0479  0.11%     -    0s
     0     0 56638.9176    0    3 56648.0000 56638.9176  0.02%     -    0s
     0     0 56638.9494    0    2 56648.0000 56638.9494  0.02%     -    0s
     0     0 56638.9494    0    4 56648.0000 56638.9494  0.02%     -    0s
     0     0 56638.9494    0    2 56648.0000 56638.9494  0.02%     -    0s
     0     0 56638.9494    0    3 56648.0000 56638.9494  0.02%     -    0s
     0     0 56638.9494    0    2 56648.0000 56638.9494  0.02%     -    0s
     0     0 56638.9494    0    2 56648.0000 56638.9494  0.02%     -    0s

Cutting planes:
  Implied bound: 32
  Flow cover: 1

Explored 0 nodes (1922 simplex iterations) in 0.36 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.664800000000e+04, best bound 5.664800000000e+04, gap 0.0%