Gurobi 5.0.1 (linux64) logging started Fri Nov 16 09:36:41 2012 Optimize a model with 15377 rows, 4422 columns and 50224 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.47s Presolved: 15441 rows, 4420 columns, 54114 nonzeros Variable types: 0 continuous, 4420 integer (4420 binary) Found heuristic solution: objective 66.0000000 Root relaxation: objective 2.000000e+00, 3173 iterations, 0.11 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 132 66.00000 2.00000 97.0% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 182 5.00000 2.66667 46.7% - 7s 0 0 2.67016 0 4218 5.00000 2.67016 46.6% - 8s 0 0 2.67016 0 4213 5.00000 2.67016 46.6% - 10s 0 0 2.67016 0 4216 5.00000 2.67016 46.6% - 11s 0 0 2.67016 0 3946 5.00000 2.67016 46.6% - 12s 0 0 2.67016 0 3895 5.00000 2.67016 46.6% - 13s 0 0 2.67016 0 3852 5.00000 2.67016 46.6% - 14s 0 0 2.67016 0 3897 5.00000 2.67016 46.6% - 15s 0 0 2.67016 0 3919 5.00000 2.67016 46.6% - 16s 0 0 2.67016 0 3888 5.00000 2.67016 46.6% - 18s 0 0 2.67016 0 3893 5.00000 2.67016 46.6% - 18s 0 0 2.67016 0 3899 5.00000 2.67016 46.6% - 19s 0 0 2.67016 0 3876 5.00000 2.67016 46.6% - 20s 0 2 2.67016 0 3876 5.00000 2.67016 46.6% - 31s * 30 3 22 4.0000000 3.00000 25.0% 246 33s Cutting planes: Clique: 144 Zero half: 16 Explored 34 nodes (57049 simplex iterations) in 34.28 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%