Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:30:19 2012 Optimize a model with 269 rows, 210 columns and 880 nonzeros Presolve removed 0 rows and 2 columns Presolve time: 0.00s Presolved: 269 rows, 208 columns, 878 nonzeros Variable types: 0 continuous, 208 integer (207 binary) Found heuristic solution: objective 54.0000000 Root relaxation: objective 0.000000e+00, 108 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 73 54.00000 0.00000 100% - 0s H 0 0 52.0000000 0.00000 100% - 0s H 0 0 50.0000000 0.00000 100% - 0s H 0 0 48.0000000 0.00000 100% - 0s 0 0 0.32110 0 75 48.00000 0.32110 99.3% - 0s 0 0 0.93881 0 78 48.00000 0.93881 98.0% - 0s H 0 0 44.0000000 0.93881 97.9% - 0s 0 0 0.93958 0 78 44.00000 0.93958 97.9% - 0s 0 0 0.93958 0 78 44.00000 0.93958 97.9% - 0s H 0 0 42.0000000 0.93958 97.8% - 0s H 0 0 40.0000000 0.93958 97.7% - 0s 0 2 0.94123 0 78 40.00000 0.94123 97.6% - 0s H 27 27 29.0000000 1.82067 93.7% 34.3 0s * 31 29 18 26.0000000 1.82067 93.0% 32.3 0s * 88 64 16 23.0000000 4.76560 79.3% 27.9 0s * 392 206 19 22.0000000 7.40212 66.4% 27.4 0s Explored 1903 nodes (41191 simplex iterations) in 1.31 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.200000000000e+01, best bound 2.200000000000e+01, gap 0.0%