Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:26:00 2012 Optimize a model with 1 rows, 148 columns and 148 nonzeros Model has 120 quadratic objective terms Presolve removed 0 rows and 30 columns Presolve time: 0.00s Presolved: 121 rows, 238 columns, 478 nonzeros Variable types: 0 continuous, 238 integer (237 binary) Found heuristic solution: objective 25.0000000 Root relaxation: objective 0.000000e+00, 142 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 23 25.00000 0.00000 100% - 0s H 0 0 22.0000000 0.00000 100% - 0s 0 0 0.00000 0 23 22.00000 0.00000 100% - 0s H 0 0 20.0000000 0.00000 100% - 0s 0 0 0.00000 0 16 20.00000 0.00000 100% - 0s H 0 0 15.0000000 0.00000 100% - 0s H 0 0 14.0000000 0.00000 100% - 0s H 0 0 13.0000000 0.00000 100% - 0s 0 0 0.00000 0 17 13.00000 0.00000 100% - 0s 0 0 0.00000 0 17 13.00000 0.00000 100% - 0s H 0 0 12.0000000 0.00000 100% - 0s 0 2 0.00000 0 17 12.00000 0.00000 100% - 0s H 27 27 11.0000000 0.00000 100% 2.5 0s H 47 17 7.0000000 0.00000 100% 2.1 0s H 54 19 5.0000000 0.00000 100% 2.1 0s H 189 51 4.0000000 0.00000 100% 2.9 0s * 384 50 6 3.0000000 1.00000 66.7% 12.0 0s Cutting planes: Cover: 218 Explored 435 nodes (8771 simplex iterations) in 0.15 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+00, best bound 3.000000000000e+00, gap 0.0%