Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:18:23 2013

Optimize a model with 594 rows, 29214 columns and 58374 nonzeros
Presolve time: 0.04s
Presolved: 594 rows, 29214 columns, 58374 nonzeros
Variable types: 29160 continuous, 54 integer (54 binary)

Root relaxation: objective 4.823016e+04, 737 iterations, 0.02 seconds

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

     0     0 48230.1586    0    9          - 48230.1586     -      -    0s
H    0     0                    50061.000000 48230.1586  3.66%     -    0s
H    0     0                    49897.000000 48230.1586  3.34%     -    0s
     0     0 48915.3285    0    8 49897.0000 48915.3285  1.97%     -    0s
     0     0 49009.9118    0    8 49897.0000 49009.9118  1.78%     -    0s
H    0     0                    49319.000000 49009.9118  0.63%     -    0s
     0     0 49017.5653    0    8 49319.0000 49017.5653  0.61%     -    0s
     0     0 49017.5653    0    9 49319.0000 49017.5653  0.61%     -    0s
     0     0 49017.5653    0    8 49319.0000 49017.5653  0.61%     -    0s
     0     0 49017.5653    0    8 49319.0000 49017.5653  0.61%     -    0s
     0     0 49017.5653    0    8 49319.0000 49017.5653  0.61%     -    0s
     0     0 49017.8838    0    7 49319.0000 49017.8838  0.61%     -    0s
     0     0 49018.0630    0    7 49319.0000 49018.0630  0.61%     -    0s
     0     2 49021.3291    0    7 49319.0000 49021.3291  0.60%     -    0s
*   13     9              12    49151.000000 49080.3720  0.14%  19.8    0s

Cutting planes:
  Implied bound: 142
  Flow cover: 8

Explored 26 nodes (2583 simplex iterations) in 1.04 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.915100000000e+04, best bound 4.915100000000e+04, gap 0.0%