Gurobi 5.0.1 (linux64) logging started Thu Jan 17 23:44:44 2013 Optimize a model with 950 rows, 25850 columns and 52050 nonzeros Presolve removed 100 rows and 150 columns Presolve time: 0.13s Presolved: 850 rows, 25700 columns, 51400 nonzeros Variable types: 25500 continuous, 200 integer (200 binary) Root relaxation: objective 2.208160e+05, 2476 iterations, 0.08 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 220815.985 0 4 - 220815.985 - - 0s H 0 0 243352.68555 220815.985 9.26% - 0s H 0 0 228505.19903 220815.985 3.37% - 0s 0 0 220899.042 0 2 228505.199 220899.042 3.33% - 0s 0 0 220951.276 0 4 228505.199 220951.276 3.31% - 0s 0 0 220953.119 0 3 228505.199 220953.119 3.30% - 0s 0 0 220954.409 0 3 228505.199 220954.409 3.30% - 0s 0 0 220955.255 0 3 228505.199 220955.255 3.30% - 0s 0 0 220959.078 0 3 228505.199 220959.078 3.30% - 0s 0 0 220962.187 0 3 228505.199 220962.187 3.30% - 0s 0 0 220962.883 0 3 228505.199 220962.883 3.30% - 0s 0 0 220963.341 0 3 228505.199 220963.341 3.30% - 0s 0 0 220963.756 0 3 228505.199 220963.756 3.30% - 0s 0 0 220964.317 0 3 228505.199 220964.317 3.30% - 0s 0 0 220964.317 0 3 228505.199 220964.317 3.30% - 0s 0 2 220974.638 0 3 228505.199 220974.638 3.30% - 1s * 58 13 55 221699.43453 221183.572 0.23% 17.2 1s * 74 9 6 221606.00454 221466.254 0.06% 30.4 2s * 77 0 13 221466.25414 221466.254 0.0% 29.8 2s Cutting planes: Flow cover: 19 Explored 78 nodes (5047 simplex iterations) in 2.19 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.214662541417e+05, best bound 2.214662541417e+05, gap 0.0%