Gurobi 5.0.1 (linux64) logging started Sat Nov 17 19:52:05 2012 Optimize a model with 1 rows, 7 columns and 7 nonzeros Model has 12 quadratic objective terms Presolve time: 0.00s Presolved: 13 rows, 19 columns, 43 nonzeros Variable types: 0 continuous, 19 integer (19 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 0.000000e+00, 15 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 7 7.00000 0.00000 100% - 0s 0 0 0.00000 0 14 7.00000 0.00000 100% - 0s 0 0 0.00000 0 14 7.00000 0.00000 100% - 0s 0 0 0.00000 0 7 7.00000 0.00000 100% - 0s H 0 0 4.0000000 0.00000 100% - 0s 0 2 0.00000 0 7 4.00000 0.00000 100% - 0s Cutting planes: Cover: 6 Explored 32 nodes (93 simplex iterations) in 0.01 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%