Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:14:17 2013 Optimize a model with 572 rows, 27092 columns and 54132 nonzeros Presolve time: 0.04s Presolved: 572 rows, 27092 columns, 54132 nonzeros Variable types: 27040 continuous, 52 integer (52 binary) Root relaxation: objective 5.550468e+04, 1047 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 55504.6783 0 9 - 55504.6783 - - 0s H 0 0 59099.000000 55504.6783 6.08% - 0s H 0 0 56679.000000 55504.6783 2.07% - 0s 0 0 55833.8390 0 4 56679.0000 55833.8390 1.49% - 0s 0 0 55847.9980 0 4 56679.0000 55847.9980 1.47% - 0s 0 0 55859.7572 0 4 56679.0000 55859.7572 1.45% - 0s 0 0 55866.3408 0 4 56679.0000 55866.3408 1.43% - 0s 0 0 55867.4813 0 4 56679.0000 55867.4813 1.43% - 0s 0 0 55867.6642 0 4 56679.0000 55867.6642 1.43% - 0s 0 0 55867.9075 0 4 56679.0000 55867.9075 1.43% - 0s 0 0 55867.9703 0 4 56679.0000 55867.9703 1.43% - 0s 0 2 55868.1575 0 4 56679.0000 55868.1575 1.43% - 0s H 5 5 56051.416667 55916.6435 0.24% 30.8 0s H 6 4 56016.186667 55916.6435 0.18% 28.3 0s H 7 4 55986.941176 55916.6435 0.13% 25.4 0s * 11 3 10 55938.000000 55916.6435 0.04% 20.6 0s Cutting planes: Implied bound: 78 Flow cover: 5 Explored 14 nodes (1704 simplex iterations) in 0.80 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.593800000000e+04, best bound 5.593503703704e+04, gap 0.0053%