Gurobi 5.0.1 (linux64) logging started Thu Jan 17 23:18:14 2013 Optimize a model with 800 rows, 25350 columns and 50950 nonzeros Presolve removed 50 rows and 50 columns Presolve time: 0.12s Presolved: 750 rows, 25300 columns, 50750 nonzeros Variable types: 25250 continuous, 50 integer (50 binary) Root relaxation: objective 2.198499e+05, 1953 iterations, 0.07 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 219849.939 0 2 - 219849.939 - - 0s H 0 0 224116.92822 219849.939 1.90% - 0s 0 0 219872.711 0 2 224116.928 219872.711 1.89% - 0s 0 0 219881.378 0 2 224116.928 219881.378 1.89% - 0s 0 0 219886.158 0 2 224116.928 219886.158 1.89% - 0s 0 0 219894.272 0 2 224116.928 219894.272 1.88% - 0s 0 0 219895.776 0 2 224116.928 219895.776 1.88% - 0s 0 0 219899.963 0 2 224116.928 219899.963 1.88% - 0s 0 0 219899.963 0 2 224116.928 219899.963 1.88% - 0s 0 0 219899.963 0 2 224116.928 219899.963 1.88% - 0s 0 0 219899.963 0 2 224116.928 219899.963 1.88% - 0s 0 0 219899.963 0 2 224116.928 219899.963 1.88% - 0s 0 0 219901.914 0 2 224116.928 219901.914 1.88% - 0s 0 0 219901.914 0 2 224116.928 219901.914 1.88% - 1s 0 0 219901.914 0 2 224116.928 219901.914 1.88% - 1s 0 2 219909.558 0 2 224116.928 219909.558 1.88% - 1s * 7 6 7 220916.27003 220306.336 0.28% 69.6 1s Cutting planes: Flow cover: 12 Explored 12 nodes (3432 simplex iterations) in 1.48 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.209162700342e+05, best bound 2.208981767488e+05, gap 0.0082%