Gurobi 5.0.1 (linux64) logging started Fri Nov 16 08:13:01 2012 Optimize a model with 11906 rows, 4032 columns and 39436 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.32s Presolved: 11967 rows, 4030 columns, 43027 nonzeros Variable types: 0 continuous, 4030 integer (4030 binary) Found heuristic solution: objective 63.0000000 Root relaxation: objective 2.000000e+00, 2886 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 0 124 63.00000 2.00000 96.8% - 0s H 0 0 55.0000000 2.00000 96.4% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 170 5.00000 2.66667 46.7% - 1s 0 0 2.67033 0 3476 5.00000 2.67033 46.6% - 2s 0 0 2.67033 0 3479 5.00000 2.67033 46.6% - 3s 0 0 2.67033 0 3279 5.00000 2.67033 46.6% - 4s 0 0 2.67033 0 3280 5.00000 2.67033 46.6% - 5s 0 0 2.67033 0 3213 5.00000 2.67033 46.6% - 6s 0 0 2.67033 0 3154 5.00000 2.67033 46.6% - 7s 0 0 2.67033 0 3137 5.00000 2.67033 46.6% - 8s 0 0 2.67033 0 3176 5.00000 2.67033 46.6% - 8s 0 0 2.67033 0 3079 5.00000 2.67033 46.6% - 10s 0 0 2.67033 0 3116 5.00000 2.67033 46.6% - 11s 0 0 2.67033 0 3131 5.00000 2.67033 46.6% - 12s 0 0 2.67033 0 3131 5.00000 2.67033 46.6% - 13s H 0 0 4.0000000 2.67033 33.2% - 15s 0 2 2.80000 0 3131 4.00000 2.80000 30.0% - 16s Cutting planes: Clique: 84 Zero half: 5 Explored 11 nodes (40110 simplex iterations) in 17.80 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%