Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:13:14 2012 Optimize a model with 1 rows, 58 columns and 58 nonzeros Model has 100 quadratic objective terms Presolve time: 0.00s Presolved: 101 rows, 158 columns, 358 nonzeros Variable types: 0 continuous, 158 integer (158 binary) Found heuristic solution: objective 39.0000000 Root relaxation: objective 0.000000e+00, 144 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 31 39.00000 0.00000 100% - 0s H 0 0 26.0000000 0.00000 100% - 0s 0 0 0.00000 0 33 26.00000 0.00000 100% - 0s 0 0 0.00000 0 30 26.00000 0.00000 100% - 0s 0 0 0.00000 0 25 26.00000 0.00000 100% - 0s H 0 0 25.0000000 0.00000 100% - 0s H 0 0 24.0000000 0.00000 100% - 0s H 0 0 21.0000000 0.00000 100% - 0s 0 0 0.00000 0 28 21.00000 0.00000 100% - 0s 0 0 0.00000 0 33 21.00000 0.00000 100% - 0s 0 0 0.00000 0 33 21.00000 0.00000 100% - 0s H 0 0 20.0000000 0.00000 100% - 0s H 0 0 19.0000000 0.00000 100% - 0s 0 2 0.00000 0 33 19.00000 0.00000 100% - 0s H 188 126 18.0000000 0.00000 100% 5.9 0s * 292 165 18 17.0000000 1.00000 94.1% 7.7 0s H 299 147 16.0000000 1.00000 93.8% 7.5 0s * 321 129 15 15.0000000 1.00000 93.3% 7.7 0s Cutting planes: Cover: 192 Explored 699 nodes (13371 simplex iterations) in 0.26 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.500000000000e+01, best bound 1.500000000000e+01, gap 0.0%