Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:19:35 2013 Optimize a model with 2600 rows, 113600 columns and 291300 nonzeros Presolve removed 100 rows and 2900 columns Presolve time: 0.56s Presolved: 2500 rows, 110700 columns, 281300 nonzeros Variable types: 110100 continuous, 600 integer (600 binary) Root relaxation: objective 9.053666e+05, 6432 iterations, 0.74 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 905366.638 0 6 - 905366.638 - - 1s 0 0 905392.238 0 6 - 905392.238 - - 2s 0 0 905424.453 0 6 - 905424.453 - - 2s 0 0 905433.954 0 6 - 905433.954 - - 3s 0 0 905436.261 0 6 - 905436.261 - - 3s 0 0 905437.760 0 6 - 905437.760 - - 3s 0 0 905438.356 0 6 - 905438.356 - - 4s 0 0 905441.493 0 6 - 905441.493 - - 4s 0 0 905442.058 0 6 - 905442.058 - - 4s 0 0 905445.977 0 6 - 905445.977 - - 5s 0 0 905446.435 0 6 - 905446.435 - - 5s 0 0 905447.438 0 6 - 905447.438 - - 5s 0 0 905447.613 0 6 - 905447.613 - - 6s 0 0 905447.748 0 6 - 905447.748 - - 6s 0 0 905447.965 0 6 - 905447.965 - - 6s 0 0 905448.087 0 6 - 905448.087 - - 7s 0 0 905448.087 0 6 - 905448.087 - - 8s H 0 0 933001.06450 905448.087 2.95% - 9s 0 2 905464.551 0 6 933001.064 905464.551 2.95% - 10s 17 19 907894.738 17 3 933001.064 905622.703 2.93% 98.8 15s H 27 13 908088.24476 905622.703 0.27% 67.3 16s * 47 17 13 908018.35356 906343.749 0.18% 75.1 18s 52 18 906590.670 5 6 908018.354 906469.912 0.17% 79.3 20s 71 22 cutoff 3 908018.354 906590.670 0.16% 81.4 25s 117 18 907340.600 5 4 908018.354 907340.600 0.07% 93.7 30s Cutting planes: Flow cover: 24 Explored 190 nodes (24528 simplex iterations) in 34.06 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.080183535562e+05, best bound 9.079359792140e+05, gap 0.0091%