Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:56:56 2012 Optimize a model with 253 rows, 175 columns and 805 nonzeros Presolve time: 0.00s Presolved: 253 rows, 175 columns, 805 nonzeros Variable types: 0 continuous, 175 integer (175 binary) Found heuristic solution: objective 56.0000000 Root relaxation: objective 0.000000e+00, 89 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 48 56.00000 0.00000 100% - 0s H 0 0 50.0000000 0.00000 100% - 0s H 0 0 49.0000000 0.00000 100% - 0s H 0 0 45.0000000 0.00000 100% - 0s 0 0 0.67647 0 49 45.00000 0.67647 98.5% - 0s 0 0 0.93226 0 51 45.00000 0.93226 97.9% - 0s 0 0 0.95365 0 51 45.00000 0.95365 97.9% - 0s H 0 0 42.0000000 0.95365 97.7% - 0s 0 0 0.97317 0 52 42.00000 0.97317 97.7% - 0s 0 0 0.97446 0 53 42.00000 0.97446 97.7% - 0s 0 0 0.97446 0 53 42.00000 0.97446 97.7% - 0s 0 2 1.02941 0 53 42.00000 1.02941 97.5% - 0s H 27 27 41.0000000 2.72269 93.4% 26.4 0s * 41 41 26 40.0000000 2.72269 93.2% 21.0 0s H 72 51 32.0000000 2.72941 91.5% 21.0 0s * 76 53 21 30.0000000 2.72941 90.9% 20.5 0s * 388 162 13 29.0000000 9.13817 68.5% 20.9 0s Explored 1746 nodes (35546 simplex iterations) in 1.04 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.900000000000e+01, best bound 2.900000000000e+01, gap 0.0%