Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:42:00 2012 Optimize a model with 1 rows, 174 columns and 174 nonzeros Model has 168 quadratic objective terms Presolve removed 0 rows and 17 columns Presolve time: 0.00s Presolved: 169 rows, 325 columns, 661 nonzeros Variable types: 0 continuous, 325 integer (324 binary) Found heuristic solution: objective 57.0000000 Root relaxation: objective 0.000000e+00, 223 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 55 57.00000 0.00000 100% - 0s H 0 0 44.0000000 0.00000 100% - 0s 0 0 0.00000 0 42 44.00000 0.00000 100% - 0s H 0 0 39.0000000 0.00000 100% - 0s 0 0 0.00000 0 42 39.00000 0.00000 100% - 0s H 0 0 32.0000000 0.00000 100% - 0s H 0 0 27.0000000 0.00000 100% - 0s 0 0 0.00000 0 29 27.00000 0.00000 100% - 0s H 0 0 24.0000000 0.00000 100% - 0s 0 0 0.00000 0 27 24.00000 0.00000 100% - 0s H 0 0 20.0000000 0.00000 100% - 0s 0 0 0.00000 0 29 20.00000 0.00000 100% - 0s 0 0 0.00000 0 15 20.00000 0.00000 100% - 0s H 0 0 15.0000000 0.00000 100% - 0s H 0 0 13.0000000 0.00000 100% - 0s 0 2 0.00000 0 15 13.00000 0.00000 100% - 0s H 81 55 11.0000000 0.00000 100% 2.0 0s H 407 219 9.0000000 0.00000 100% 6.7 0s H 564 259 8.0000000 0.00000 100% 9.3 0s * 637 261 14 7.0000000 1.00000 85.7% 9.6 0s Cutting planes: Cover: 316 MIR: 2 Zero half: 1 Explored 1012 nodes (35101 simplex iterations) in 0.66 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.000000000000e+00, best bound 7.000000000000e+00, gap 0.0%