Gurobi 5.0.1 (linux64) logging started Sun Nov 18 00:04:38 2012 Optimize a model with 273 rows, 186 columns and 866 nonzeros Presolve time: 0.00s Presolved: 273 rows, 186 columns, 866 nonzeros Variable types: 0 continuous, 186 integer (186 binary) Found heuristic solution: objective 51.0000000 Root relaxation: objective 0.000000e+00, 80 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 50 51.00000 0.00000 100% - 0s H 0 0 46.0000000 0.00000 100% - 0s 0 0 0.91176 0 52 46.00000 0.91176 98.0% - 0s H 0 0 43.0000000 0.91176 97.9% - 0s 0 0 0.94118 0 52 43.00000 0.94118 97.8% - 0s 0 0 1.02941 0 53 43.00000 1.02941 97.6% - 0s H 0 0 38.0000000 1.02941 97.3% - 0s 0 0 1.02941 0 52 38.00000 1.02941 97.3% - 0s 0 0 1.05882 0 52 38.00000 1.05882 97.2% - 0s 0 0 1.09244 0 55 38.00000 1.09244 97.1% - 0s 0 0 1.14706 0 53 38.00000 1.14706 97.0% - 0s 0 0 1.17647 0 53 38.00000 1.17647 96.9% - 0s 0 0 1.17647 0 52 38.00000 1.17647 96.9% - 0s 0 0 1.18954 0 56 38.00000 1.18954 96.9% - 0s 0 2 1.25320 0 56 38.00000 1.25320 96.7% - 0s * 29 27 17 35.0000000 4.51621 87.1% 25.9 0s * 57 47 15 33.0000000 4.52941 86.3% 25.4 0s * 60 40 15 32.0000000 4.52941 85.8% 24.3 0s * 1242 169 25 31.0000000 17.51724 43.5% 21.9 0s Explored 3349 nodes (61150 simplex iterations) in 2.03 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.100000000000e+01, best bound 3.100000000000e+01, gap 0.0%