Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:28:17 2012 Optimize a model with 1 rows, 155 columns and 155 nonzeros Model has 127 quadratic objective terms Presolve removed 0 rows and 28 columns Presolve time: 0.00s Presolved: 128 rows, 254 columns, 508 nonzeros Variable types: 0 continuous, 254 integer (253 binary) Found heuristic solution: objective 28.0000000 Root relaxation: objective 0.000000e+00, 156 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 39 28.00000 0.00000 100% - 0s 0 0 0.00000 0 31 28.00000 0.00000 100% - 0s H 0 0 25.0000000 0.00000 100% - 0s 0 0 0.00000 0 30 25.00000 0.00000 100% - 0s H 0 0 14.0000000 0.00000 100% - 0s H 0 0 12.0000000 0.00000 100% - 0s 0 0 0.00000 0 28 12.00000 0.00000 100% - 0s H 0 0 11.0000000 0.00000 100% - 0s 0 0 0.00000 0 19 11.00000 0.00000 100% - 0s 0 0 0.00000 0 22 11.00000 0.00000 100% - 0s 0 0 0.00000 0 15 11.00000 0.00000 100% - 0s 0 2 0.00000 0 15 11.00000 0.00000 100% - 0s H 352 171 10.0000000 0.00000 100% 4.8 0s * 366 170 26 9.0000000 0.00000 100% 5.1 0s H 379 114 6.0000000 0.00000 100% 5.3 0s H 404 94 5.0000000 0.00000 100% 5.2 0s H 543 134 4.0000000 0.00000 100% 7.4 0s * 562 85 9 3.0000000 1.00000 66.7% 8.2 0s Cutting planes: Cover: 219 MIR: 1 Zero half: 1 Explored 648 nodes (8297 simplex iterations) in 0.16 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+00, best bound 3.000000000000e+00, gap 0.0%