Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:49:08 2013 Optimize a model with 41728 rows, 41088 columns and 163968 nonzeros Presolve removed 64 rows and 0 columns Presolve time: 0.18s Presolved: 41664 rows, 41088 columns, 163904 nonzeros Variable types: 41024 continuous, 64 integer (64 binary) Root relaxation: objective 5.697109e+04, 5399 iterations, 3.61 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 56971.0864 0 53 - 56971.0864 - - 4s H 0 0 92163.000000 56971.0864 38.2% - 6s 0 0 72265.2069 0 17 92163.0000 72265.2069 21.6% - 12s H 0 0 80521.000000 72265.2069 10.3% - 12s 0 0 75300.6213 0 6 80521.0000 75300.6213 6.48% - 14s H 0 0 78357.000000 75300.6213 3.90% - 14s 0 0 75301.6976 0 4 78357.0000 75301.6976 3.90% - 14s H 0 0 78304.000000 75301.6976 3.83% - 14s 0 0 75301.6976 0 4 78304.0000 75301.6976 3.83% - 14s H 0 0 77724.000000 75301.6976 3.12% - 15s 0 2 75302.5609 0 4 77724.0000 75302.5609 3.12% - 15s H 8 8 76668.000000 75344.2232 1.73% 54.4 15s H 11 11 76054.304348 75344.2232 0.93% 59.6 16s H 12 11 75782.571429 75344.2232 0.58% 59.1 16s * 24 10 24 75587.000000 75344.2232 0.32% 50.7 16s * 29 4 9 75458.000000 75394.0462 0.08% 68.2 17s Cutting planes: Implied bound: 62 Explored 34 nodes (14629 simplex iterations) in 17.26 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.545800000000e+04, best bound 7.545800000000e+04, gap 0.0%