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 129 quadratic objective terms Presolve removed 0 rows and 26 columns Presolve time: 0.00s Presolved: 130 rows, 258 columns, 516 nonzeros Variable types: 0 continuous, 258 integer (257 binary) Found heuristic solution: objective 38.0000000 Root relaxation: objective 0.000000e+00, 164 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 37 38.00000 0.00000 100% - 0s H 0 0 32.0000000 0.00000 100% - 0s 0 0 0.00000 0 15 32.00000 0.00000 100% - 0s H 0 0 13.0000000 0.00000 100% - 0s H 0 0 12.0000000 0.00000 100% - 0s 0 0 0.00000 0 19 12.00000 0.00000 100% - 0s H 0 0 10.0000000 0.00000 100% - 0s 0 0 0.00000 0 19 10.00000 0.00000 100% - 0s 0 0 0.00000 0 19 10.00000 0.00000 100% - 0s H 0 0 9.0000000 0.00000 100% - 0s 0 2 0.00000 0 19 9.00000 0.00000 100% - 0s * 39 35 26 8.0000000 0.00000 100% 3.4 0s * 41 33 26 7.0000000 0.00000 100% 3.3 0s H 54 40 6.0000000 0.00000 100% 3.4 0s * 189 98 26 5.0000000 0.00000 100% 3.8 0s * 426 107 7 4.0000000 1.00000 75.0% 10.5 0s Cutting planes: Cover: 240 Explored 538 nodes (10721 simplex iterations) in 0.20 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%