Gurobi 5.0.1 (linux64) logging started Wed Apr 24 04:24:20 2013 Optimize a model with 71484 rows, 70644 columns and 282324 nonzeros Presolve removed 7042 rows and 0 columns Presolve time: 0.46s Presolved: 64442 rows, 70644 columns, 268240 nonzeros Variable types: 70560 continuous, 84 integer (84 binary) Root relaxation: objective 8.781887e+04, 13439 iterations, 3.30 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 87818.8676 0 4 - 87818.8676 - - 3s H 0 0 89941.000000 87818.8676 2.36% - 4s H 0 0 88514.000000 87818.8676 0.79% - 4s 0 0 87822.2647 0 5 88514.0000 87822.2647 0.78% - 4s H 0 0 88279.000000 87822.2647 0.52% - 5s 0 0 87822.2647 0 5 88279.0000 87822.2647 0.52% - 5s 0 0 87822.2647 0 5 88279.0000 87822.2647 0.52% - 6s 0 0 87822.2647 0 4 88279.0000 87822.2647 0.52% - 11s 0 0 87822.2647 0 5 88279.0000 87822.2647 0.52% - 11s 0 0 87822.2647 0 5 88279.0000 87822.2647 0.52% - 12s 0 0 87822.2647 0 5 88279.0000 87822.2647 0.52% - 12s 0 2 87824.0552 0 5 88279.0000 87824.0552 0.52% - 14s 1 4 88053.1079 1 4 88279.0000 87971.6649 0.35% 283 15s H 4 2 88226.446154 88064.1084 0.18% 263 15s H 6 3 88188.000000 88064.1084 0.14% 229 15s * 7 2 5 88154.000000 88064.1084 0.10% 198 15s Cutting planes: Gomory: 2 Flow cover: 3 Explored 10 nodes (22160 simplex iterations) in 15.66 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.815400000000e+04, best bound 8.815400000000e+04, gap 0.0%