Gurobi 5.0.1 (linux64) logging started Sun Nov 18 08:42:42 2012 Optimize a model with 276 rows, 788 columns and 788 nonzeros Model has 550 quadratic constraints Presolve removed 0 rows and 17 columns Presolve time: 3.19s Presolved: 276 rows, 771 columns, 771 nonzeros Variable types: 550 continuous, 221 integer (220 binary) Root relaxation: objective 0.000000e+00, 83 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time H 0 0 145.0000000 - - - 3s 0 0 0.00000 0 96 145.00000 0.00000 100% - 3s 0 0 0.00000 0 128 145.00000 0.00000 100% - 3s 0 0 0.00000 0 126 145.00000 0.00000 100% - 3s 0 2 0.00000 0 125 145.00000 0.00000 100% - 3s H 54 54 30.0000000 2.58065 91.4% 34.1 3s * 74 67 58 29.0000000 2.58065 91.1% 30.5 3s H 162 111 28.0000000 3.28235 88.3% 25.3 3s H 254 139 26.0000000 3.37391 87.0% 22.0 3s * 268 141 39 25.0000000 3.37391 86.5% 22.1 3s H 464 125 20.0000000 4.59016 77.0% 20.0 3s 606 176 5.64167 15 479 20.00000 5.64167 71.8% 24.6 5s * 1289 276 43 19.0000000 10.36508 45.4% 34.7 7s * 1529 277 38 18.0000000 11.33803 37.0% 34.6 8s 2313 230 cutoff 34 18.00000 13.39161 25.6% 34.8 10s Explored 2920 nodes (101502 simplex iterations) in 11.30 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.800000000000e+01, best bound 1.800000000000e+01, gap 0.0%