Gurobi 5.0.1 (linux64) logging started Sat Nov 17 19:57:08 2012 Optimize a model with 297 rows, 172 columns and 912 nonzeros Presolve time: 0.00s Presolved: 297 rows, 172 columns, 912 nonzeros Variable types: 0 continuous, 172 integer (172 binary) Found heuristic solution: objective 78.0000000 Found heuristic solution: objective 72.0000000 Root relaxation: objective 0.000000e+00, 51 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 24 72.00000 0.00000 100% - 0s H 0 0 71.0000000 0.00000 100% - 0s H 0 0 67.0000000 0.00000 100% - 0s 0 0 0.85427 0 37 67.00000 0.85427 98.7% - 0s 0 0 0.95455 0 26 67.00000 0.95455 98.6% - 0s 0 0 0.95967 0 51 67.00000 0.95967 98.6% - 0s 0 0 1.04545 0 26 67.00000 1.04545 98.4% - 0s 0 0 1.04545 0 26 67.00000 1.04545 98.4% - 0s 0 0 1.04545 0 26 67.00000 1.04545 98.4% - 0s 0 0 1.04545 0 26 67.00000 1.04545 98.4% - 0s H 0 0 66.0000000 1.04545 98.4% - 0s 0 2 1.15923 0 26 66.00000 1.15923 98.2% - 0s H 165 87 63.0000000 19.26316 69.4% 27.7 0s * 233 118 15 62.0000000 20.14973 67.5% 26.6 0s * 470 193 15 61.0000000 26.55556 56.5% 23.5 0s * 935 248 25 59.0000000 31.33333 46.9% 24.0 0s Cutting planes: Gomory: 1 Mod-K: 4 Explored 5816 nodes (103541 simplex iterations) in 3.02 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.900000000000e+01, best bound 5.900000000000e+01, gap 0.0%