Gurobi 5.0.1 (linux64) logging started Sat Nov 17 19:54:01 2012 Optimize a model with 229 rows, 135 columns and 705 nonzeros Presolve time: 0.00s Presolved: 229 rows, 135 columns, 705 nonzeros Variable types: 0 continuous, 135 integer (135 binary) Found heuristic solution: objective 64.0000000 Root relaxation: objective 0.000000e+00, 41 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 21 64.00000 0.00000 100% - 0s H 0 0 55.0000000 0.00000 100% - 0s 0 0 0.73810 0 23 55.00000 0.73810 98.7% - 0s 0 0 1.07143 0 23 55.00000 1.07143 98.1% - 0s 0 0 1.11169 0 35 55.00000 1.11169 98.0% - 0s 0 0 1.13241 0 36 55.00000 1.13241 97.9% - 0s H 0 0 53.0000000 1.13241 97.9% - 0s 0 0 1.17502 0 47 53.00000 1.17502 97.8% - 0s 0 0 1.23810 0 23 53.00000 1.23810 97.7% - 0s 0 0 1.40476 0 24 53.00000 1.40476 97.3% - 0s 0 0 1.40476 0 24 53.00000 1.40476 97.3% - 0s 0 0 1.40476 0 24 53.00000 1.40476 97.3% - 0s 0 2 1.70000 0 24 53.00000 1.70000 96.8% - 0s * 68 36 10 49.0000000 13.00000 73.5% 23.7 0s * 157 81 13 48.0000000 19.00000 60.4% 22.5 0s * 161 80 14 47.0000000 19.00000 59.6% 22.0 0s * 1094 117 12 46.0000000 36.23077 21.2% 15.1 0s Cutting planes: Gomory: 1 Mod-K: 6 Explored 1542 nodes (22012 simplex iterations) in 0.51 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.600000000000e+01, best bound 4.600000000000e+01, gap 0.0%