Gurobi 5.0.1 (linux64) logging started Fri Nov 16 06:47:06 2012 Optimize a model with 11445 rows, 3540 columns and 37581 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.28s Presolved: 11502 rows, 3538 columns, 40674 nonzeros Variable types: 0 continuous, 3538 integer (3538 binary) Found heuristic solution: objective 59.0000000 Root relaxation: objective 2.000000e+00, 2597 iterations, 0.08 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 118 59.00000 2.00000 96.6% - 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 2134 5.00000 2.66667 46.7% - 1s H 0 0 4.0000000 2.66667 33.3% - 3s 0 0 2.66667 0 2134 4.00000 2.66667 33.3% - 3s 0 0 2.66667 0 172 4.00000 2.66667 33.3% - 7s 0 0 2.67059 0 2696 4.00000 2.67059 33.2% - 8s 0 0 2.67059 0 2869 4.00000 2.67059 33.2% - 9s 0 0 2.67059 0 2765 4.00000 2.67059 33.2% - 10s 0 0 2.67059 0 2769 4.00000 2.67059 33.2% - 12s 0 0 2.67059 0 2790 4.00000 2.67059 33.2% - 13s 0 0 2.67059 0 2801 4.00000 2.67059 33.2% - 14s 0 0 2.67059 0 2696 4.00000 2.67059 33.2% - 15s 0 0 2.67059 0 2709 4.00000 2.67059 33.2% - 16s 0 0 2.67059 0 2703 4.00000 2.67059 33.2% - 16s 0 2 2.67059 0 2703 4.00000 2.67059 33.2% - 19s 5 1 cutoff 2 4.00000 3.00000 25.0% 818 20s Cutting planes: Clique: 80 Zero half: 3 Explored 7 nodes (49679 simplex iterations) in 21.40 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%