Gurobi 5.0.1 (linux64) logging started Fri Nov 16 14:21:20 2012 Optimize a model with 22124 rows, 5700 columns and 71698 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.77s Presolved: 22122 rows, 5698 columns, 71108 nonzeros Variable types: 0 continuous, 5698 integer (5698 binary) Found heuristic solution: objective 75.0000000 Root relaxation: objective 2.000000e+00, 4387 iterations, 0.21 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 150 75.00000 2.00000 97.3% - 1s H 0 0 6.0000000 2.00000 66.7% - 1s 0 0 2.66667 0 214 6.00000 2.66667 55.6% - 15s 0 0 2.66972 0 5323 6.00000 2.66972 55.5% - 16s 0 0 2.66972 0 5321 6.00000 2.66972 55.5% - 19s 0 0 2.66972 0 5322 6.00000 2.66972 55.5% - 19s 0 0 2.66972 0 4960 6.00000 2.66972 55.5% - 22s 0 0 2.66972 0 5009 6.00000 2.66972 55.5% - 24s 0 0 2.66972 0 5004 6.00000 2.66972 55.5% - 26s 0 0 2.66972 0 4990 6.00000 2.66972 55.5% - 28s 0 0 2.66972 0 4935 6.00000 2.66972 55.5% - 30s 0 0 2.66972 0 5057 6.00000 2.66972 55.5% - 31s 0 0 2.66972 0 5064 6.00000 2.66972 55.5% - 34s 0 0 2.66972 0 5063 6.00000 2.66972 55.5% - 36s 0 0 2.66972 0 5047 6.00000 2.66972 55.5% - 37s 0 0 2.66972 0 5055 6.00000 2.66972 55.5% - 39s 0 0 2.66972 0 4970 6.00000 2.66972 55.5% - 40s 0 2 2.80000 0 4970 6.00000 2.80000 53.3% - 125s * 29 3 18 4.0000000 3.00000 25.0% 347 127s Cutting planes: Clique: 156 Zero half: 6 Explored 33 nodes (81528 simplex iterations) in 127.67 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%