Gurobi 5.0.1 (linux64) logging started Fri Jan 18 06:57:02 2013 Optimize a model with 3200 rows, 151200 columns and 753100 nonzeros Presolve removed 100 rows and 100 columns Presolve time: 0.90s Presolved: 3100 rows, 151100 columns, 703000 nonzeros Variable types: 150200 continuous, 900 integer (900 binary) Root relaxation: objective 7.918217e+05, 7428 iterations, 0.77 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 791821.709 0 6 - 791821.709 - - 2s 0 0 791835.159 0 6 - 791835.159 - - 2s 0 0 791842.002 0 8 - 791842.002 - - 3s 0 0 791843.056 0 9 - 791843.056 - - 3s 0 0 791844.507 0 8 - 791844.507 - - 4s 0 0 791844.554 0 8 - 791844.554 - - 4s 0 0 791844.781 0 8 - 791844.781 - - 5s 0 0 791844.812 0 8 - 791844.812 - - 5s 0 0 791844.827 0 8 - 791844.827 - - 6s 0 0 791844.854 0 8 - 791844.854 - - 7s 0 0 791844.854 0 8 - 791844.854 - - 8s 0 2 791867.470 0 8 - 791867.470 - - 16s 11 13 793414.099 10 3 - 792440.055 - 89.3 20s 30 32 793753.502 29 3 - 792440.055 - 44.1 25s 50 52 793836.888 49 3 - 792440.055 - 28.4 30s 74 76 793948.237 73 1 - 792440.055 - 20.0 35s 96 98 794070.510 95 1 - 792440.055 - 16.1 40s 124 126 794232.714 123 1 - 792440.055 - 12.9 45s 151 153 794451.420 150 1 - 792440.055 - 11.1 50s * 163 19 162 794562.29496 792440.055 0.27% 10.8 51s H 193 18 793513.73177 792576.606 0.12% 14.1 54s 202 22 793506.835 30 3 793513.732 792576.606 0.12% 13.6 55s * 215 22 43 793508.99991 792576.606 0.12% 13.2 56s 277 55 793006.459 7 3 793509.000 792704.059 0.10% 14.8 60s * 280 16 10 793200.24980 792704.059 0.06% 15.3 60s Cutting planes: Flow cover: 13 Explored 353 nodes (16593 simplex iterations) in 64.76 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.932002498024e+05, best bound 7.931482602591e+05, gap 0.0066%