Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:30:13 2013 Optimize a model with 6600 rows, 110300 columns and 235500 nonzeros Presolve removed 100 rows and 100 columns Presolve time: 0.78s Presolved: 6500 rows, 110200 columns, 230400 nonzeros Variable types: 105200 continuous, 5000 integer (5000 binary) Root relaxation: objective 8.951303e+05, 8439 iterations, 1.84 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 895130.293 0 8 - 895130.293 - - 2s 0 0 895208.909 0 8 - 895208.909 - - 4s 0 0 895217.425 0 8 - 895217.425 - - 5s 0 0 895217.935 0 8 - 895217.935 - - 5s 0 0 895218.539 0 8 - 895218.539 - - 5s 0 0 895222.551 0 8 - 895222.551 - - 6s 0 0 895222.602 0 8 - 895222.602 - - 6s 0 0 895222.965 0 8 - 895222.965 - - 7s 0 0 895222.980 0 8 - 895222.980 - - 7s 0 0 895223.074 0 8 - 895223.074 - - 7s 0 0 895223.074 0 8 - 895223.074 - - 8s 0 0 895223.074 0 8 - 895223.074 - - 9s H 0 0 911910.80873 895223.074 1.83% - 10s 0 2 895223.074 0 8 911910.809 895223.074 1.83% - 11s 9 11 899506.436 5 2 911910.809 895550.054 1.79% 305 15s H 27 18 903350.61812 896074.601 0.81% 212 19s 31 19 896130.174 19 2 903350.618 896130.174 0.80% 187 20s 68 23 897959.594 55 2 903350.618 896211.254 0.79% 99.5 25s 102 25 896473.337 84 2 903350.618 896211.254 0.79% 74.3 30s 135 26 896597.657 108 2 903350.618 896211.254 0.79% 67.9 35s 161 27 897337.897 129 2 903350.618 896211.254 0.79% 64.3 40s H 162 10 898475.87174 896211.254 0.25% 63.9 40s 187 13 897559.288 154 2 898475.872 896211.254 0.25% 59.2 45s 211 13 897667.976 175 2 898475.872 896211.254 0.25% 57.5 50s 239 13 897886.114 200 2 898475.872 896211.254 0.25% 55.6 55s 264 13 898152.238 224 2 898475.872 896211.254 0.25% 53.1 60s 290 14 896634.324 3 2 898475.872 896211.254 0.25% 53.3 65s 362 17 898335.608 48 2 898475.872 896211.254 0.25% 49.5 70s * 389 8 10 896949.94038 896549.978 0.04% 50.9 72s * 400 4 12 896634.43616 896634.324 0.00% 50.8 73s Cutting planes: Implied bound: 33 Flow cover: 19 Explored 401 nodes (31999 simplex iterations) in 73.34 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.966344361626e+05, best bound 8.966343243635e+05, gap 0.0000%