Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:06:13 2013 Optimize a model with 22654 rows, 22184 columns and 88454 nonzeros Presolve removed 47 rows and 0 columns Presolve time: 0.10s Presolved: 22607 rows, 22184 columns, 88407 nonzeros Variable types: 22137 continuous, 47 integer (47 binary) Root relaxation: objective 4.472693e+04, 3031 iterations, 0.75 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 44726.9281 0 38 - 44726.9281 - - 0s H 0 0 56517.000000 44726.9281 20.9% - 1s 0 0 50736.7596 0 7 56517.0000 50736.7596 10.2% - 2s H 0 0 54668.124659 50736.7596 7.19% - 2s H 0 0 53183.000000 50736.7596 4.60% - 2s H 0 0 52270.000000 50736.7596 2.93% - 2s 0 0 51013.9350 0 3 52270.0000 51013.9350 2.40% - 2s 0 0 51015.9203 0 4 52270.0000 51015.9203 2.40% - 2s 0 0 51018.2808 0 3 52270.0000 51018.2808 2.39% - 2s H 0 0 52208.871524 51018.2808 2.28% - 2s H 0 0 51810.000000 51018.2808 1.53% - 2s H 0 0 51666.000000 51018.2808 1.25% - 3s 0 2 51022.8696 0 3 51666.0000 51022.8696 1.24% - 3s * 9 5 7 51573.000000 51062.9744 0.99% 74.7 3s * 11 3 6 51561.000000 51062.9744 0.97% 63.0 3s H 14 2 51315.000000 51080.9972 0.46% 57.1 3s * 23 3 14 51292.000000 51080.9972 0.41% 53.5 3s H 25 3 51243.739496 51114.5352 0.25% 53.2 4s H 26 3 51233.388060 51114.5352 0.23% 54.8 4s * 27 2 7 51199.000000 51114.5352 0.16% 55.7 4s Cutting planes: Implied bound: 42 Explored 31 nodes (6829 simplex iterations) in 4.14 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.119900000000e+04, best bound 5.119900000000e+04, gap 0.0%