Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:10:32 2012 Optimize a model with 1 rows, 44 columns and 44 nonzeros Model has 56 quadratic objective terms Presolve removed 0 rows and 1 columns Presolve time: 0.00s Presolved: 57 rows, 99 columns, 211 nonzeros Variable types: 0 continuous, 99 integer (98 binary) Found heuristic solution: objective 17.0000000 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 19 17.00000 0.00000 100% - 0s 0 0 0.00000 0 27 17.00000 0.00000 100% - 0s H 0 0 13.0000000 0.00000 100% - 0s 0 0 0.00000 0 11 13.00000 0.00000 100% - 0s H 0 0 9.0000000 0.00000 100% - 0s 0 0 0.00000 0 12 9.00000 0.00000 100% - 0s 0 0 0.00000 0 11 9.00000 0.00000 100% - 0s 0 2 0.00000 0 11 9.00000 0.00000 100% - 0s H 98 61 8.0000000 0.00000 100% 4.2 0s H 108 56 7.0000000 0.00000 100% 4.5 0s * 175 42 6 6.0000000 1.00000 83.3% 7.5 0s Cutting planes: Cover: 104 MIR: 1 Explored 222 nodes (2694 simplex iterations) in 0.05 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.000000000000e+00, best bound 6.000000000000e+00, gap 0.0%