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 54 quadratic objective terms Presolve time: 0.00s Presolved: 55 rows, 99 columns, 207 nonzeros Variable types: 0 continuous, 99 integer (99 binary) Found heuristic solution: objective 21.0000000 Root relaxation: objective 0.000000e+00, 74 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 17 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 19 15.00000 0.00000 100% - 0s 0 0 0.00000 0 14 15.00000 0.00000 100% - 0s H 0 0 12.0000000 0.00000 100% - 0s H 0 0 9.0000000 0.00000 100% - 0s 0 2 0.00000 0 14 9.00000 0.00000 100% - 0s H 90 65 8.0000000 0.00000 100% 4.3 0s H 91 60 7.0000000 0.00000 100% 4.3 0s H 162 48 4.0000000 0.00000 100% 5.5 0s Cutting planes: Cover: 93 Explored 219 nodes (2304 simplex iterations) in 0.04 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%