Gurobi 5.0.1 (linux64) logging started Fri Nov 16 08:38:17 2012 Optimize a model with 13887 rows, 4160 columns and 45502 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.40s Presolved: 13949 rows, 4158 columns, 49164 nonzeros Variable types: 0 continuous, 4158 integer (4158 binary) Found heuristic solution: objective 64.0000000 Root relaxation: objective 2.000000e+00, 2937 iterations, 0.10 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 126 64.00000 2.00000 96.9% - 0s H 0 0 59.0000000 2.00000 96.6% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 187 5.00000 2.66667 46.7% - 3s 0 0 2.67027 0 3770 5.00000 2.67027 46.6% - 3s 0 0 2.67027 0 3764 5.00000 2.67027 46.6% - 5s 0 0 2.67027 0 3761 5.00000 2.67027 46.6% - 5s 0 0 2.67027 0 3767 5.00000 2.67027 46.6% - 6s 0 0 2.67027 0 3452 5.00000 2.67027 46.6% - 7s 0 0 2.67027 0 3452 5.00000 2.67027 46.6% - 9s 0 0 2.67027 0 3456 5.00000 2.67027 46.6% - 10s 0 0 2.67027 0 3541 5.00000 2.67027 46.6% - 11s 0 0 2.67027 0 3544 5.00000 2.67027 46.6% - 12s 0 0 2.67027 0 3544 5.00000 2.67027 46.6% - 13s 0 2 2.67027 0 3544 5.00000 2.67027 46.6% - 19s 11 3 4.00000 2 112 5.00000 3.00000 40.0% 902 22s * 36 4 24 4.0000000 3.00000 25.0% 365 22s 40 0 cutoff 1 4.00000 4.00000 0.0% 532 25s Cutting planes: Clique: 111 Zero half: 11 Explored 41 nodes (47427 simplex iterations) in 25.16 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%