Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:16:51 2013 Optimize a model with 2600 rows, 113600 columns and 291300 nonzeros Presolve removed 100 rows and 2900 columns Presolve time: 0.61s Presolved: 2500 rows, 110700 columns, 281300 nonzeros Variable types: 110100 continuous, 600 integer (600 binary) Root relaxation: objective 8.951303e+05, 7849 iterations, 1.34 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 895130.293 0 12 - 895130.293 - - 2s 0 0 895186.364 0 12 - 895186.364 - - 3s 0 0 895195.818 0 12 - 895195.818 - - 3s 0 0 895199.899 0 12 - 895199.899 - - 4s 0 0 895200.562 0 12 - 895200.562 - - 4s 0 0 895203.312 0 12 - 895203.312 - - 5s 0 0 895204.214 0 12 - 895204.214 - - 5s 0 0 895205.402 0 12 - 895205.402 - - 5s 0 0 895205.843 0 12 - 895205.843 - - 6s 0 0 895205.933 0 12 - 895205.933 - - 6s 0 0 895206.277 0 12 - 895206.277 - - 7s 0 0 895206.473 0 12 - 895206.473 - - 7s 0 0 895206.473 0 12 - 895206.473 - - 9s H 0 0 911910.80873 895206.473 1.83% - 10s 0 2 895215.215 0 12 911910.809 895215.215 1.83% - 11s 7 9 895556.548 7 2 911910.809 895514.420 1.80% 111 15s H 27 27 903350.61812 895514.420 0.87% 46.9 20s 63 49 897083.388 63 5 903350.618 895514.420 0.87% 30.2 25s 74 50 897772.183 74 4 903350.618 895514.420 0.87% 30.2 30s * 77 41 77 898078.20513 895514.420 0.29% 30.2 30s 95 45 898022.964 18 3 898078.205 895578.013 0.28% 37.3 35s 154 71 897680.567 45 3 898078.205 895768.124 0.26% 31.7 40s H 192 52 897092.52451 895866.128 0.14% 34.0 43s 217 43 896817.243 4 3 897092.525 896293.899 0.09% 33.3 45s * 230 31 17 896949.94038 896293.899 0.07% 32.9 45s * 266 8 19 896634.43616 896582.089 0.01% 34.6 48s Cutting planes: Flow cover: 19 Explored 267 nodes (19262 simplex iterations) in 48.46 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.966344361626e+05, best bound 8.965820890370e+05, gap 0.0058%