Gurobi 5.0.1 (linux64) logging started Fri Nov 16 12:10:00 2012 Optimize a model with 17323 rows, 5112 columns and 56727 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.59s Presolved: 17392 rows, 5110 columns, 61280 nonzeros Variable types: 0 continuous, 5110 integer (5110 binary) Found heuristic solution: objective 71.0000000 Root relaxation: objective 2.000000e+00, 3543 iterations, 0.15 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 142 71.00000 2.00000 97.2% - 1s H 0 0 5.0000000 2.00000 60.0% - 1s 0 0 2.66667 0 384 5.00000 2.66667 46.7% - 8s 0 0 2.67980 0 4312 5.00000 2.67980 46.4% - 9s 0 0 2.67980 0 4263 5.00000 2.67980 46.4% - 11s 0 0 2.67980 0 4255 5.00000 2.67980 46.4% - 12s 0 0 2.67980 0 4254 5.00000 2.67980 46.4% - 13s 0 0 2.67980 0 4214 5.00000 2.67980 46.4% - 14s H 0 0 4.0000000 2.67980 33.0% - 14s 0 0 2.67980 0 4253 4.00000 2.67980 33.0% - 15s 0 0 2.67980 0 4126 4.00000 2.67980 33.0% - 18s 0 0 2.67980 0 4009 4.00000 2.67980 33.0% - 20s 0 0 2.67980 0 3983 4.00000 2.67980 33.0% - 24s 0 0 2.67980 0 3948 4.00000 2.67980 33.0% - 26s 0 0 2.67980 0 3960 4.00000 2.67980 33.0% - 28s 0 0 2.67980 0 3837 4.00000 2.67980 33.0% - 31s 0 0 2.67980 0 3736 4.00000 2.67980 33.0% - 33s 0 0 2.67980 0 3730 4.00000 2.67980 33.0% - 35s 0 0 2.67980 0 3723 4.00000 2.67980 33.0% - 37s 0 0 2.67980 0 3724 4.00000 2.67980 33.0% - 39s 0 0 2.67980 0 3530 4.00000 2.67980 33.0% - 41s 0 0 2.67980 0 3695 4.00000 2.67980 33.0% - 44s 0 0 2.67980 0 3695 4.00000 2.67980 33.0% - 45s 0 1 3.00000 0 3695 4.00000 3.00000 25.0% - 70s Cutting planes: Clique: 194 Zero half: 8 Explored 10 nodes (109734 simplex iterations) in 70.85 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%