Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:18 2012 Optimize a model with 474 rows, 100 columns and 948 nonzeros Presolve removed 159 rows and 0 columns Presolve time: 0.00s Presolved: 315 rows, 100 columns, 762 nonzeros Variable types: 0 continuous, 100 integer (100 binary) Found heuristic solution: objective 28.0000000 Root relaxation: objective 3.680435e+01, 210 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 36.80435 0 97 28.00000 36.80435 31.4% - 0s 0 0 36.41939 0 99 28.00000 36.41939 30.1% - 0s 0 0 35.98657 0 99 28.00000 35.98657 28.5% - 0s H 0 0 30.0000000 35.98657 20.0% - 0s 0 0 35.68199 0 99 30.00000 35.68199 18.9% - 0s 0 0 35.57375 0 100 30.00000 35.57375 18.6% - 0s H 0 0 32.0000000 35.57375 11.2% - 0s 0 0 35.42134 0 98 32.00000 35.42134 10.7% - 0s 0 0 35.25448 0 99 32.00000 35.25448 10.2% - 0s 0 0 35.13544 0 97 32.00000 35.13544 9.80% - 0s 0 0 35.09610 0 100 32.00000 35.09610 9.68% - 0s 0 0 35.01002 0 99 32.00000 35.01002 9.41% - 0s 0 0 34.96328 0 100 32.00000 34.96328 9.26% - 0s 0 0 34.93618 0 100 32.00000 34.93618 9.18% - 0s 0 0 34.92298 0 100 32.00000 34.92298 9.13% - 0s 0 0 34.92298 0 100 32.00000 34.92298 9.13% - 0s 0 2 34.92219 0 100 32.00000 34.92219 9.13% - 0s Cutting planes: Zero half: 58 Mod-K: 1 Explored 51 nodes (2343 simplex iterations) in 0.15 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.200000000000e+01, best bound 3.200000000000e+01, gap 0.0%