Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:11:38 2012 Optimize a model with 1 rows, 51 columns and 51 nonzeros Model has 80 quadratic objective terms Presolve time: 0.00s Presolved: 81 rows, 131 columns, 291 nonzeros Variable types: 0 continuous, 131 integer (131 binary) Found heuristic solution: objective 32.0000000 Root relaxation: objective 0.000000e+00, 97 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 19 32.00000 0.00000 100% - 0s H 0 0 19.0000000 0.00000 100% - 0s 0 0 0.00000 0 28 19.00000 0.00000 100% - 0s H 0 0 17.0000000 0.00000 100% - 0s 0 0 0.00000 0 25 17.00000 0.00000 100% - 0s 0 0 0.00000 0 17 17.00000 0.00000 100% - 0s 0 0 0.00000 0 19 17.00000 0.00000 100% - 0s 0 0 0.00000 0 25 17.00000 0.00000 100% - 0s 0 0 0.00000 0 25 17.00000 0.00000 100% - 0s 0 2 0.00000 0 25 17.00000 0.00000 100% - 0s H 105 74 16.0000000 0.00000 100% 4.0 0s H 130 90 15.0000000 0.00000 100% 4.5 0s H 177 108 14.0000000 0.00000 100% 7.0 0s H 253 116 13.0000000 1.00000 92.3% 8.7 0s * 443 82 10 12.0000000 5.54545 53.8% 16.0 0s Cutting planes: Cover: 156 Explored 573 nodes (9945 simplex iterations) in 0.18 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.200000000000e+01, best bound 1.200000000000e+01, gap 0.0%