Gurobi 5.0.1 (linux64) logging started Wed Apr 24 03:00:30 2013 Optimize a model with 58596 rows, 57836 columns and 231116 nonzeros Presolve removed 5125 rows and 0 columns Presolve time: 0.37s Presolved: 53471 rows, 57836 columns, 220866 nonzeros Variable types: 57760 continuous, 76 integer (76 binary) Root relaxation: objective 9.043550e+04, 13262 iterations, 2.82 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 90435.5000 0 1 - 90435.5000 - - 3s H 0 0 90866.000000 90435.5000 0.47% - 3s 0 0 90438.8704 0 1 90866.0000 90438.8704 0.47% - 3s 0 0 90438.8704 0 1 90866.0000 90438.8704 0.47% - 7s 0 0 90439.2703 0 3 90866.0000 90439.2703 0.47% - 7s 0 0 90439.2703 0 3 90866.0000 90439.2703 0.47% - 7s 0 2 90441.8937 0 3 90866.0000 90441.8937 0.47% - 10s H 4 4 90696.640000 90508.3595 0.21% 110 10s H 5 2 90688.000000 90508.3595 0.20% 93.0 10s H 7 2 90668.000000 90508.3595 0.18% 118 10s * 8 1 7 90604.000000 90508.3595 0.11% 110 10s Cutting planes: Gomory: 2 Flow cover: 1 Explored 10 nodes (19607 simplex iterations) in 10.86 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.060400000000e+04, best bound 9.060400000000e+04, gap 0.0%