Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:19:20 2012 Optimize a model with 247 rows, 185 columns and 800 nonzeros Presolve time: 0.00s Presolved: 247 rows, 185 columns, 800 nonzeros Variable types: 0 continuous, 185 integer (185 binary) Found heuristic solution: objective 48.0000000 Root relaxation: objective 0.000000e+00, 91 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 61 48.00000 0.00000 100% - 0s H 0 0 42.0000000 0.00000 100% - 0s 0 0 0.61475 0 62 42.00000 0.61475 98.5% - 0s 0 0 1.00000 0 63 42.00000 1.00000 97.6% - 0s 0 0 1.07241 0 64 42.00000 1.07241 97.4% - 0s H 0 0 32.0000000 1.07241 96.6% - 0s 0 2 1.11010 0 64 32.00000 1.11010 96.5% - 0s * 27 27 17 27.0000000 3.51852 87.0% 24.6 0s * 50 38 13 24.0000000 3.54815 85.2% 26.5 0s * 629 169 24 23.0000000 13.67257 40.6% 21.6 0s Explored 1226 nodes (26832 simplex iterations) in 0.85 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.300000000000e+01, best bound 2.300000000000e+01, gap 0.0%