Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:15:09 2013

Optimize a model with 27664 rows, 27144 columns and 108264 nonzeros
Presolve removed 52 rows and 0 columns
Presolve time: 0.12s
Presolved: 27612 rows, 27144 columns, 108212 nonzeros
Variable types: 27092 continuous, 52 integer (52 binary)

Root relaxation: objective 4.806695e+04, 4408 iterations, 1.90 seconds

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

     0     0 48066.9515    0   45          - 48066.9515     -      -    2s
H    0     0                    70309.000000 48066.9515  31.6%     -    3s
     0     0 59635.5946    0    6 70309.0000 59635.5946  15.2%     -    4s
H    0     0                    63289.025259 59635.5946  5.77%     -    4s
H    0     0                    61723.000000 59635.5946  3.38%     -    4s
     0     0 60363.6063    0    4 61723.0000 60363.6063  2.20%     -    5s
H    0     0                    61612.000000 60363.6063  2.03%     -    5s
     0     0 60439.0709    0    5 61612.0000 60439.0709  1.90%     -    5s
     0     0 60443.3424    0    3 61612.0000 60443.3424  1.90%     -    5s
H    0     0                    61169.000000 60443.3424  1.19%     -    5s
H    0     0                    61053.000000 60443.3424  1.00%     -    6s
     0     2 60447.7181    0    3 61053.0000 60447.7181  0.99%     -    6s
H    3     3                    60689.000000 60522.7188  0.27%  74.3    6s
H    5     3                    60633.772727 60526.5349  0.18%  86.4    6s
*    7     3               6    60599.000000 60530.4851  0.11%  82.7    6s
*   10     1               2    60538.000000 60538.0000   0.0%  83.9    6s

Cutting planes:
  Gomory: 1
  Implied bound: 49

Explored 11 nodes (8681 simplex iterations) in 6.54 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.053800000000e+04, best bound 6.053800000000e+04, gap 0.0%