Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:35:26 2013 Optimize a model with 2200 rows, 103800 columns and 214900 nonzeros Presolve removed 100 rows and 1300 columns Presolve time: 0.31s Presolved: 2100 rows, 102500 columns, 212900 nonzeros Variable types: 102100 continuous, 400 integer (400 binary) Root relaxation: objective 7.918217e+05, 6642 iterations, 0.65 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 791821.709 0 4 - 791821.709 - - 1s H 0 0 924415.35381 791821.709 14.3% - 1s 0 0 791887.633 0 4 924415.354 791887.633 14.3% - 1s 0 0 791952.257 0 4 924415.354 791952.257 14.3% - 2s 0 0 791953.861 0 4 924415.354 791953.861 14.3% - 2s 0 0 791953.861 0 4 924415.354 791953.861 14.3% - 2s 0 0 791959.521 0 4 924415.354 791959.521 14.3% - 2s 0 0 791959.521 0 4 924415.354 791959.521 14.3% - 3s 0 0 791960.358 0 4 924415.354 791960.358 14.3% - 3s 0 0 791965.479 0 4 924415.354 791965.479 14.3% - 4s 0 0 791967.520 0 4 924415.354 791967.520 14.3% - 4s 0 0 791967.520 0 4 924415.354 791967.520 14.3% - 4s 0 0 791967.976 0 4 924415.354 791967.976 14.3% - 5s 0 0 791968.216 0 4 924415.354 791968.216 14.3% - 5s 0 0 791968.216 0 4 924415.354 791968.216 14.3% - 6s 0 2 792018.152 0 4 924415.354 792018.152 14.3% - 6s 18 20 793232.322 16 2 924415.354 792666.717 14.3% 68.3 10s * 27 16 25 793505.77764 792666.717 0.11% 60.5 11s 42 19 793346.904 12 2 793505.778 792728.959 0.10% 54.1 15s * 43 16 13 793357.35859 792728.959 0.08% 53.9 15s * 63 7 5 793200.24980 792858.022 0.04% 69.7 18s Cutting planes: Flow cover: 19 Explored 75 nodes (13820 simplex iterations) in 18.56 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.932002498024e+05, best bound 7.931451205771e+05, gap 0.0070%