Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:31:00 2012 Optimize a model with 138 rows, 350 columns and 350 nonzeros Model has 274 quadratic constraints Presolve removed 0 rows and 3 columns Presolve time: 1.62s Presolved: 138 rows, 347 columns, 347 nonzeros Variable types: 274 continuous, 73 integer (72 binary) Root relaxation: objective 0.000000e+00, 35 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time H 0 0 65.0000000 - - - 1s 0 0 0.00000 0 68 65.00000 0.00000 100% - 1s 0 0 0.48467 0 72 65.00000 0.48467 99.3% - 1s 0 2 0.51724 0 72 65.00000 0.51724 99.2% - 1s * 34 34 21 28.0000000 1.05305 96.2% 24.6 1s H 61 50 27.0000000 2.72000 89.9% 31.1 1s H 84 62 25.0000000 5.00000 80.0% 29.6 1s * 112 79 20 24.0000000 5.00000 79.2% 28.9 1s * 476 149 18 23.0000000 10.76271 53.2% 24.2 1s * 572 151 14 22.0000000 11.12500 49.4% 24.8 2s * 635 136 13 21.0000000 12.46429 40.6% 24.7 2s * 1209 57 13 20.0000000 17.17949 14.1% 25.9 2s Cutting planes: Gomory: 1 Explored 1274 nodes (33254 simplex iterations) in 2.46 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.000000000000e+01, best bound 2.000000000000e+01, gap 0.0%