Gurobi 5.0.1 (linux64) logging started Fri Nov 16 09:42:16 2012 Optimize a model with 16103 rows, 4422 columns and 52402 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.49s Presolved: 16167 rows, 4420 columns, 56270 nonzeros Variable types: 0 continuous, 4420 integer (4420 binary) Found heuristic solution: objective 66.0000000 Root relaxation: objective 2.000000e+00, 3310 iterations, 0.13 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 65.0000000 2.00000 96.9% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 4157 5.00000 2.66667 46.7% - 7s 0 0 2.66667 0 4156 5.00000 2.66667 46.7% - 9s 0 0 2.66667 0 4156 5.00000 2.66667 46.7% - 9s 0 0 2.66667 0 310 5.00000 2.66667 46.7% - 12s 0 0 2.67725 0 3782 5.00000 2.67725 46.5% - 15s 0 0 2.67725 0 3760 5.00000 2.67725 46.5% - 15s 0 0 2.67725 0 3770 5.00000 2.67725 46.5% - 16s 0 0 2.67725 0 3743 5.00000 2.67725 46.5% - 17s 0 0 2.67725 0 3744 5.00000 2.67725 46.5% - 19s 0 0 2.67725 0 3745 5.00000 2.67725 46.5% - 20s 0 0 2.67725 0 3755 5.00000 2.67725 46.5% - 22s 0 0 2.67725 0 3755 5.00000 2.67725 46.5% - 22s 0 2 3.00000 0 3755 5.00000 3.00000 40.0% - 68s * 20 4 19 4.0000000 3.00000 25.0% 336 69s Cutting planes: Clique: 233 Zero half: 13 Explored 27 nodes (57485 simplex iterations) in 69.22 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%