Gurobi 5.0.1 (linux64) logging started Wed Apr 24 03:36:42 2013 Optimize a model with 64880 rows, 64080 columns and 256080 nonzeros Presolve removed 1784 rows and 0 columns Presolve time: 0.41s Presolved: 63096 rows, 64080 columns, 252512 nonzeros Variable types: 64000 continuous, 80 integer (80 binary) Root relaxation: objective 9.384871e+04, 15786 iterations, 3.57 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 93848.7061 0 3 - 93848.7061 - - 4s H 0 0 96431.000000 93848.7061 2.68% - 4s H 0 0 95017.000000 93848.7061 1.23% - 4s H 0 0 94661.000000 93848.7061 0.86% - 4s 0 0 93850.8639 0 4 94661.0000 93850.8639 0.86% - 4s 0 0 93850.8639 0 4 94661.0000 93850.8639 0.86% - 5s 0 2 93852.2769 0 4 94661.0000 93852.2769 0.85% - 7s H 13 8 94549.571429 94036.6046 0.54% 177 9s H 15 9 94543.000000 94036.6046 0.54% 158 9s 17 10 94472.3256 14 1 94543.0000 94036.6046 0.54% 147 10s * 19 9 16 94534.000000 94036.6046 0.53% 141 10s * 51 27 13 94421.000000 94056.0986 0.39% 96.6 12s H 83 32 94393.000000 94075.1442 0.34% 92.7 13s * 85 28 6 94354.000000 94090.4737 0.28% 94.7 13s 112 4 94347.9091 5 1 94354.0000 94320.6621 0.04% 90.4 15s Cutting planes: Gomory: 1 Flow cover: 4 Explored 116 nodes (26000 simplex iterations) in 15.07 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.435400000000e+04, best bound 9.434586030109e+04, gap 0.0086%