Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:29:16 2012 Optimize a model with 1 rows, 158 columns and 158 nonzeros Model has 126 quadratic objective terms Presolve removed 0 rows and 28 columns Presolve time: 0.00s Presolved: 127 rows, 256 columns, 508 nonzeros Variable types: 0 continuous, 256 integer (255 binary) Found heuristic solution: objective 35.0000000 Root relaxation: objective 0.000000e+00, 162 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 35.00000 0.00000 100% - 0s H 0 0 25.0000000 0.00000 100% - 0s 0 0 0.00000 0 19 25.00000 0.00000 100% - 0s H 0 0 21.0000000 0.00000 100% - 0s 0 0 0.00000 0 22 21.00000 0.00000 100% - 0s H 0 0 17.0000000 0.00000 100% - 0s H 0 0 13.0000000 0.00000 100% - 0s 0 0 0.00000 0 13 13.00000 0.00000 100% - 0s H 0 0 9.0000000 0.00000 100% - 0s 0 0 0.00000 0 9 9.00000 0.00000 100% - 0s H 0 0 7.0000000 0.00000 100% - 0s 0 0 0.00000 0 8 7.00000 0.00000 100% - 0s 0 0 0.00000 0 8 7.00000 0.00000 100% - 0s 0 0 0.00000 0 13 7.00000 0.00000 100% - 0s 0 0 0.00000 0 13 7.00000 0.00000 100% - 0s 0 2 0.00000 0 13 7.00000 0.00000 100% - 0s H 23 16 5.0000000 0.00000 100% 3.2 0s H 54 32 4.0000000 0.00000 100% 3.4 0s H 205 52 3.0000000 0.00000 100% 5.3 0s H 270 31 2.0000000 0.00000 100% 6.6 0s Cutting planes: Cover: 205 MIR: 1 Explored 417 nodes (4745 simplex iterations) in 0.11 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.000000000000e+00, best bound 2.000000000000e+00, gap 0.0%