Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:11:12 2012 Optimize a model with 489 rows, 452 columns and 1672 nonzeros Presolve removed 0 rows and 16 columns Presolve time: 0.00s Presolved: 489 rows, 436 columns, 1656 nonzeros Variable types: 0 continuous, 436 integer (435 binary) Found heuristic solution: objective 88.0000000 Root relaxation: objective 0.000000e+00, 256 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 0 174 88.00000 0.00000 100% - 0s H 0 0 76.0000000 0.00000 100% - 0s H 0 0 75.0000000 0.00000 100% - 0s H 0 0 72.0000000 0.00000 100% - 0s 0 0 0.36939 0 175 72.00000 0.36939 99.5% - 0s H 0 0 66.0000000 0.36939 99.4% - 0s 0 0 1.00000 0 180 66.00000 1.00000 98.5% - 0s H 0 0 56.0000000 1.00000 98.2% - 0s H 0 0 42.0000000 1.00000 97.6% - 0s 0 0 1.00000 0 179 42.00000 1.00000 97.6% - 0s H 0 0 36.0000000 1.00000 97.2% - 0s 0 0 1.00000 0 176 36.00000 1.00000 97.2% - 0s 0 0 1.00000 0 177 36.00000 1.00000 97.2% - 0s 0 0 1.00000 0 177 36.00000 1.00000 97.2% - 0s 0 2 1.00000 0 176 36.00000 1.00000 97.2% - 0s H 27 27 29.0000000 1.00000 96.6% 60.9 0s * 90 59 56 19.0000000 1.00000 94.7% 27.8 0s H 122 56 17.0000000 1.00000 94.1% 28.7 0s * 1107 153 20 16.0000000 10.58333 33.9% 31.2 1s Explored 1446 nodes (43795 simplex iterations) in 2.12 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.600000000000e+01, best bound 1.600000000000e+01, gap 0.0%