Gurobi 5.0.1 (linux64) logging started Wed Apr 24 14:07:15 2013 Optimize a model with 2970 rows, 729270 columns and 1458270 nonzeros Presolve time: 4.59s Presolved: 2970 rows, 729270 columns, 1458270 nonzeros Variable types: 729000 continuous, 270 integer (270 binary) Starting sifting (using dual simplex for sub-problems)... Iter Pivots Primal Obj Dual Obj Time 0 0 infinity 4.7397000e+04 0s 1 11536 1.4490000e+10 6.4448325e+04 0s 2 20103 1.6532711e+08 6.8039849e+04 1s 3 27560 1.0514324e+06 9.5677050e+04 1s 4 38410 7.6069403e+05 1.6749441e+05 1s 5 49588 7.1517209e+05 2.7905924e+05 1s 6 60857 6.9349916e+05 4.3759518e+05 1s 7 69991 6.9006230e+05 6.3777784e+05 2s Sifting complete Root relaxation: objective 6.900314e+05, 78446 iterations, 1.82 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 690031.418 0 5 - 690031.418 - - 7s H 0 0 714727.00000 690031.418 3.46% - 8s 0 0 690200.559 0 4 714727.000 690200.559 3.43% - 12s H 0 0 691557.00000 690200.559 0.20% - 14s 0 0 690217.711 0 4 691557.000 690217.711 0.19% - 15s 0 0 690217.711 0 5 691557.000 690217.711 0.19% - 20s 0 0 690217.711 0 4 691557.000 690217.711 0.19% - 22s 0 0 690217.711 0 4 691557.000 690217.711 0.19% - 24s 0 0 690217.711 0 4 691557.000 690217.711 0.19% - 24s 0 0 690220.602 0 3 691557.000 690220.602 0.19% - 25s 0 0 690220.602 0 3 691557.000 690220.602 0.19% - 25s 0 0 690220.602 0 3 691557.000 690220.602 0.19% - 26s 0 0 690220.602 0 3 691557.000 690220.602 0.19% - 27s 0 0 690220.602 0 3 691557.000 690220.602 0.19% - 28s 0 2 690258.393 0 3 691557.000 690258.393 0.19% - 30s 12 13 690656.520 12 1 691557.000 690428.141 0.16% 131 35s H 20 14 691475.00000 690428.141 0.15% 120 38s * 21 12 20 691382.00000 690428.141 0.14% 117 38s * 23 4 3 690744.00000 690543.184 0.03% 150 39s 24 3 cutoff 3 690744.000 690642.887 0.01% 148 40s Cutting planes: Implied bound: 155 Flow cover: 4 Explored 29 nodes (94814 simplex iterations) in 40.58 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.907440000000e+05, best bound 6.907025287253e+05, gap 0.0060%