Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:01:54 2013 Optimize a model with 19006 rows, 18576 columns and 74046 nonzeros Presolve removed 43 rows and 0 columns Presolve time: 0.08s Presolved: 18963 rows, 18576 columns, 74003 nonzeros Variable types: 18533 continuous, 43 integer (43 binary) Root relaxation: objective 4.379787e+04, 3704 iterations, 0.87 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 43797.8709 0 34 - 43797.8709 - - 1s H 0 0 55860.000000 43797.8709 21.6% - 1s 0 0 50321.0903 0 5 55860.0000 50321.0903 9.92% - 2s H 0 0 51509.501109 50321.0903 2.31% - 2s H 0 0 50811.000000 50321.0903 0.96% - 2s H 0 0 50438.000000 50321.0903 0.23% - 2s 0 0 50343.1008 0 6 50438.0000 50343.1008 0.19% - 2s 0 0 50343.6089 0 3 50438.0000 50343.6089 0.19% - 2s 0 0 50407.0361 0 2 50438.0000 50407.0361 0.06% - 2s 0 0 50407.8182 0 1 50438.0000 50407.8182 0.06% - 2s 0 0 50407.8182 0 28 50438.0000 50407.8182 0.06% - 3s 0 0 50407.8182 0 2 50438.0000 50407.8182 0.06% - 4s 0 0 50407.8182 0 1 50438.0000 50407.8182 0.06% - 4s * 0 0 0 50432.000000 50432.0000 0.0% - 4s Cutting planes: Gomory: 3 Implied bound: 27 Explored 0 nodes (9463 simplex iterations) in 4.66 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.043200000000e+04, best bound 5.043200000000e+04, gap 0.0%