Gurobi 5.0.1 (linux64) logging started Thu Jan 17 23:43:51 2013 Optimize a model with 420 rows, 4260 columns and 8800 nonzeros Presolve removed 40 rows and 40 columns Presolve time: 0.01s Presolved: 380 rows, 4220 columns, 8660 nonzeros Variable types: 4140 continuous, 80 integer (80 binary) Root relaxation: objective 3.839329e+04, 438 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 38393.2919 0 2 - 38393.2919 - - 0s 0 0 38444.4557 0 3 - 38444.4557 - - 0s 0 0 38444.4901 0 3 - 38444.4901 - - 0s 0 0 38444.4901 0 3 - 38444.4901 - - 0s 0 0 38444.4901 0 3 - 38444.4901 - - 0s H 0 0 42357.627598 38444.4901 9.24% - 0s 0 2 38445.0695 0 3 42357.6276 38445.0695 9.24% - 0s * 14 6 14 38645.010978 38528.7401 0.30% 12.7 0s * 17 2 4 38632.970298 38565.7064 0.17% 14.1 0s Cutting planes: Flow cover: 6 Explored 20 nodes (761 simplex iterations) in 0.21 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.863297029776e+04, best bound 3.863297029776e+04, gap 0.0%