Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:06:05 2013 Optimize a model with 517 rows, 22137 columns and 44227 nonzeros Presolve time: 0.03s Presolved: 517 rows, 22137 columns, 44227 nonzeros Variable types: 22090 continuous, 47 integer (47 binary) Root relaxation: objective 5.236174e+04, 982 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 52361.7372 0 7 - 52361.7372 - - 0s H 0 0 54245.000000 52361.7372 3.47% - 0s H 0 0 52736.000000 52361.7372 0.71% - 0s 0 0 52496.4319 0 5 52736.0000 52496.4319 0.45% - 0s 0 0 52502.7184 0 5 52736.0000 52502.7184 0.44% - 0s 0 0 52504.4006 0 4 52736.0000 52504.4006 0.44% - 0s 0 0 52505.2000 0 4 52736.0000 52505.2000 0.44% - 0s 0 0 52505.2000 0 4 52736.0000 52505.2000 0.44% - 0s H 0 0 52634.000000 52505.2000 0.24% - 0s 0 2 52512.5636 0 4 52634.0000 52512.5636 0.23% - 0s Cutting planes: Implied bound: 63 Flow cover: 3 Explored 6 nodes (1458 simplex iterations) in 0.45 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.263400000000e+04, best bound 5.263400000000e+04, gap 0.0%