Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:10:40 2012 Optimize a model with 1 rows, 45 columns and 45 nonzeros Model has 68 quadratic objective terms Presolve removed 0 rows and 1 columns Presolve time: 0.00s Presolved: 69 rows, 112 columns, 248 nonzeros Variable types: 0 continuous, 112 integer (111 binary) Found heuristic solution: objective 25.0000000 Root relaxation: objective 0.000000e+00, 85 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 22 25.00000 0.00000 100% - 0s H 0 0 21.0000000 0.00000 100% - 0s 0 0 0.00000 0 27 21.00000 0.00000 100% - 0s H 0 0 17.0000000 0.00000 100% - 0s H 0 0 15.0000000 0.00000 100% - 0s 0 0 0.00000 0 18 15.00000 0.00000 100% - 0s 0 0 0.00000 0 20 15.00000 0.00000 100% - 0s 0 0 0.00000 0 23 15.00000 0.00000 100% - 0s 0 0 0.00000 0 13 15.00000 0.00000 100% - 0s H 0 0 12.0000000 0.00000 100% - 0s 0 2 0.00000 0 13 12.00000 0.00000 100% - 0s H 27 27 11.0000000 0.00000 100% 1.7 0s H 152 61 9.0000000 0.00000 100% 6.1 0s H 179 52 8.0000000 0.00000 100% 8.1 0s Cutting planes: Gomory: 1 Cover: 129 Explored 248 nodes (4642 simplex iterations) in 0.07 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.000000000000e+00, best bound 8.000000000000e+00, gap 0.0%