Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:55:26 2012 Optimize a model with 1 rows, 48 columns and 48 nonzeros Model has 96 quadratic objective terms Presolve time: 0.00s Presolved: 97 rows, 144 columns, 336 nonzeros Variable types: 0 continuous, 144 integer (144 binary) Found heuristic solution: objective 36.0000000 Found heuristic solution: objective 34.0000000 Root relaxation: objective 0.000000e+00, 120 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 35 34.00000 0.00000 100% - 0s H 0 0 30.0000000 0.00000 100% - 0s 0 0 0.00000 0 51 30.00000 0.00000 100% - 0s 0 0 0.00000 0 35 30.00000 0.00000 100% - 0s 0 0 0.00000 0 40 30.00000 0.00000 100% - 0s 0 0 0.00000 0 27 30.00000 0.00000 100% - 0s H 0 0 27.0000000 0.00000 100% - 0s H 0 0 24.0000000 0.00000 100% - 0s H 0 0 23.0000000 0.00000 100% - 0s 0 2 0.00000 0 23 23.00000 0.00000 100% - 0s H 3 3 22.0000000 0.00000 100% 1.0 0s * 205 145 20 21.0000000 0.00000 100% 6.3 0s * 222 148 16 20.0000000 0.00000 100% 7.5 0s H 720 97 19.0000000 10.35000 45.5% 20.6 0s Cutting planes: Cover: 186 MIR: 12 Zero half: 6 Explored 920 nodes (18334 simplex iterations) in 0.36 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.900000000000e+01, best bound 1.900000000000e+01, gap 0.0%