Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:26:05 2013 Optimize a model with 51262 rows, 50552 columns and 201782 nonzeros Presolve removed 71 rows and 0 columns Presolve time: 0.23s Presolved: 51191 rows, 50552 columns, 201711 nonzeros Variable types: 50481 continuous, 71 integer (71 binary) Root relaxation: objective 5.416832e+04, 5562 iterations, 2.79 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 54168.3151 0 50 - 54168.3151 - - 3s H 0 0 80396.000000 54168.3151 32.6% - 4s H 0 0 72115.000000 54168.3151 24.9% - 15s 0 0 65297.6597 0 16 72115.0000 65297.6597 9.45% - 21s 0 0 68574.5323 0 9 72115.0000 68574.5323 4.91% - 23s 0 0 69025.3027 0 5 72115.0000 69025.3027 4.28% - 24s 0 0 69026.3744 0 4 72115.0000 69026.3744 4.28% - 24s H 0 0 71818.000000 69026.3744 3.89% - 24s 0 2 69030.6919 0 4 71818.0000 69030.6919 3.88% - 25s H 3 3 71697.963604 69106.1505 3.61% 105 26s H 4 4 70921.770833 69108.6154 2.56% 110 26s H 5 5 69757.142857 69109.1565 0.93% 103 26s H 11 9 69322.000000 69109.1565 0.31% 118 27s H 14 8 69261.000000 69109.1565 0.22% 121 27s * 19 10 15 69249.000000 69109.1565 0.20% 127 28s * 27 11 9 69235.000000 69138.6251 0.14% 117 28s Cutting planes: Gomory: 1 Implied bound: 67 Explored 58 nodes (18467 simplex iterations) in 29.97 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.923500000000e+04, best bound 6.923500000000e+04, gap 0.0%