Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:44 2012 Optimize a model with 550 rows, 105 columns and 1100 nonzeros Presolve removed 207 rows and 0 columns Presolve time: 0.00s Presolved: 343 rows, 105 columns, 870 nonzeros Variable types: 0 continuous, 105 integer (105 binary) Found heuristic solution: objective 27.0000000 Root relaxation: objective 3.723058e+01, 267 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 37.23058 0 93 27.00000 37.23058 37.9% - 0s H 0 0 29.0000000 37.23058 28.4% - 0s 0 0 36.63346 0 97 29.00000 36.63346 26.3% - 0s 0 0 36.22429 0 94 29.00000 36.22429 24.9% - 0s H 0 0 30.0000000 36.22429 20.7% - 0s 0 0 36.16625 0 99 30.00000 36.16625 20.6% - 0s H 0 0 31.0000000 36.16625 16.7% - 0s 0 0 35.95406 0 99 31.00000 35.95406 16.0% - 0s H 0 0 32.0000000 35.95406 12.4% - 0s 0 0 35.85298 0 99 32.00000 35.85298 12.0% - 0s H 0 0 33.0000000 35.85298 8.65% - 0s 0 0 35.66912 0 101 33.00000 35.66912 8.09% - 0s 0 0 35.59506 0 103 33.00000 35.59506 7.86% - 0s 0 0 35.58201 0 102 33.00000 35.58201 7.82% - 0s 0 0 35.58175 0 103 33.00000 35.58175 7.82% - 0s 0 0 35.58175 0 101 33.00000 35.58175 7.82% - 0s 0 2 35.58088 0 101 33.00000 35.58088 7.82% - 0s Cutting planes: Gomory: 1 Clique: 2 Zero half: 30 Explored 34 nodes (2251 simplex iterations) in 0.13 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.300000000000e+01, best bound 3.300000000000e+01, gap 0.0%