Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:08:22 2012 Optimize a model with 439 rows, 424 columns and 1519 nonzeros Presolve removed 0 rows and 18 columns Presolve time: 0.00s Presolved: 439 rows, 406 columns, 1501 nonzeros Variable types: 0 continuous, 406 integer (405 binary) Found heuristic solution: objective 78.0000000 Root relaxation: objective 0.000000e+00, 260 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 0 173 78.00000 0.00000 100% - 0s H 0 0 55.0000000 0.00000 100% - 0s 0 0 0.40688 0 175 55.00000 0.40688 99.3% - 0s H 0 0 39.0000000 0.40688 99.0% - 0s 0 0 0.79784 0 178 39.00000 0.79784 98.0% - 0s H 0 0 33.0000000 0.79784 97.6% - 0s 0 0 0.79990 0 180 33.00000 0.79990 97.6% - 0s 0 0 0.79990 0 180 33.00000 0.79990 97.6% - 0s 0 2 0.80083 0 180 33.00000 0.80083 97.6% - 0s H 27 18 11.0000000 2.76413 74.9% 32.4 0s * 32 12 21 10.0000000 2.76413 72.4% 33.8 0s Cutting planes: Gomory: 3 Mod-K: 1 Explored 73 nodes (3613 simplex iterations) in 0.23 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.000000000000e+01, best bound 1.000000000000e+01, gap 0.0%