Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:14:23 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 6.028512e+04, 1458 iterations, 0.03 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 60285.1220 0 4 - 60285.1220 - - 0s H 0 0 61954.000000 60285.1220 2.69% - 0s 0 0 60388.5793 0 4 61954.0000 60388.5793 2.53% - 0s H 0 0 61860.000000 60388.5793 2.38% - 0s 0 0 60422.3437 0 3 61860.0000 60422.3437 2.32% - 0s H 0 0 61818.000000 60422.3437 2.26% - 0s 0 0 60427.6700 0 3 61818.0000 60427.6700 2.25% - 0s H 0 0 61537.000000 60427.6700 1.80% - 0s 0 0 60437.9745 0 3 61537.0000 60437.9745 1.79% - 0s 0 0 60442.6158 0 3 61537.0000 60442.6158 1.78% - 0s H 0 0 61389.000000 60442.6158 1.54% - 0s 0 0 60442.6158 0 3 61389.0000 60442.6158 1.54% - 0s 0 0 60442.6158 0 3 61389.0000 60442.6158 1.54% - 0s 0 0 60443.3424 0 3 61389.0000 60443.3424 1.54% - 0s 0 2 60443.5123 0 3 61389.0000 60443.5123 1.54% - 0s H 5 4 60704.793103 60497.8750 0.34% 20.6 0s H 6 3 60578.000000 60500.9384 0.13% 24.7 0s * 7 2 6 60538.000000 60500.9384 0.06% 25.4 0s Cutting planes: Implied bound: 49 Flow cover: 1 Explored 12 nodes (1912 simplex iterations) in 0.69 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.053800000000e+04, best bound 6.053800000000e+04, gap 0.0%