Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:48:24 2012 Optimize a model with 325 rows, 244 columns and 1054 nonzeros Presolve removed 0 rows and 2 columns Presolve time: 0.00s Presolved: 325 rows, 242 columns, 1052 nonzeros Variable types: 0 continuous, 242 integer (241 binary) Found heuristic solution: objective 75.0000000 Root relaxation: objective 0.000000e+00, 135 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 79 75.00000 0.00000 100% - 0s H 0 0 56.0000000 0.00000 100% - 0s 0 0 0.55389 0 80 56.00000 0.55389 99.0% - 0s H 0 0 55.0000000 0.55389 99.0% - 0s 0 0 1.00000 0 82 55.00000 1.00000 98.2% - 0s H 0 0 53.0000000 1.00000 98.1% - 0s 0 0 1.22080 0 85 53.00000 1.22080 97.7% - 0s H 0 0 50.0000000 1.22080 97.6% - 0s 0 0 1.22546 0 86 50.00000 1.22546 97.5% - 0s 0 0 1.22546 0 86 50.00000 1.22546 97.5% - 0s H 0 0 44.0000000 1.22546 97.2% - 0s 0 2 1.23524 0 86 44.00000 1.23524 97.2% - 0s * 29 27 16 33.0000000 3.51756 89.3% 40.9 0s * 76 61 31 30.0000000 4.59206 84.7% 33.0 0s * 77 52 31 29.0000000 4.59206 84.2% 32.6 0s * 527 211 13 28.0000000 12.01979 57.1% 27.9 0s * 727 216 19 26.0000000 13.73219 47.2% 26.5 0s * 1116 172 9 25.0000000 16.55107 33.8% 25.3 1s Cutting planes: Gomory: 4 Mod-K: 1 Explored 1638 nodes (40431 simplex iterations) in 1.46 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.500000000000e+01, best bound 2.500000000000e+01, gap 0.0%