Gurobi 5.0.1 (linux64) logging started Wed Apr 24 03:39:36 2013 Optimize a model with 880 rows, 64080 columns and 128080 nonzeros Presolve time: 0.10s Presolved: 880 rows, 64080 columns, 128080 nonzeros Variable types: 64000 continuous, 80 integer (80 binary) Root relaxation: objective 9.128050e+04, 2261 iterations, 0.08 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 91280.5044 0 11 - 91280.5044 - - 0s H 0 0 100970.00000 91280.5044 9.60% - 0s H 0 0 92058.000000 91280.5044 0.84% - 0s 0 0 91726.7518 0 8 92058.0000 91726.7518 0.36% - 0s 0 0 91726.7518 0 11 92058.0000 91726.7518 0.36% - 0s 0 0 91729.2736 0 8 92058.0000 91729.2736 0.36% - 1s 0 0 91747.8033 0 9 92058.0000 91747.8033 0.34% - 1s 0 0 91754.7232 0 8 92058.0000 91754.7232 0.33% - 1s 0 0 91756.0101 0 8 92058.0000 91756.0101 0.33% - 1s 0 0 91758.1479 0 8 92058.0000 91758.1479 0.33% - 1s 0 0 91761.6692 0 8 92058.0000 91761.6692 0.32% - 1s 0 0 91761.8435 0 8 92058.0000 91761.8435 0.32% - 1s 0 0 91762.9195 0 8 92058.0000 91762.9195 0.32% - 1s 0 0 91830.6974 0 4 92058.0000 91830.6974 0.25% - 1s 0 2 91833.6097 0 4 92058.0000 91833.6097 0.24% - 2s * 12 0 4 92018.000000 92018.0000 0.0% 52.9 2s Cutting planes: Implied bound: 148 Flow cover: 4 Explored 13 nodes (6018 simplex iterations) in 2.33 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.201800000000e+04, best bound 9.201800000000e+04, gap 0.0%