Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:11:15 2012 Optimize a model with 754 rows, 174 columns and 1508 nonzeros Presolve removed 176 rows and 2 columns Presolve time: 0.01s Presolved: 578 rows, 172 columns, 1259 nonzeros Variable types: 0 continuous, 172 integer (172 binary) Found heuristic solution: objective 56.0000000 Root relaxation: objective 7.084783e+01, 382 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 70.84783 0 167 56.00000 70.84783 26.5% - 0s H 0 0 58.0000000 70.84783 22.2% - 0s 0 0 69.93905 0 169 58.00000 69.93905 20.6% - 0s 0 0 69.07547 0 171 58.00000 69.07547 19.1% - 0s 0 0 68.37500 0 167 58.00000 68.37500 17.9% - 0s 0 0 68.08309 0 168 58.00000 68.08309 17.4% - 0s 0 0 67.79114 0 170 58.00000 67.79114 16.9% - 0s 0 0 67.35473 0 167 58.00000 67.35473 16.1% - 0s 0 0 67.15810 0 168 58.00000 67.15810 15.8% - 0s 0 0 66.92954 0 169 58.00000 66.92954 15.4% - 0s 0 0 66.81467 0 170 58.00000 66.81467 15.2% - 0s 0 0 66.66831 0 171 58.00000 66.66831 14.9% - 0s 0 0 66.64145 0 169 58.00000 66.64145 14.9% - 0s 0 0 66.61279 0 169 58.00000 66.61279 14.8% - 0s 0 0 66.61279 0 169 58.00000 66.61279 14.8% - 0s 0 2 66.61279 0 169 58.00000 66.61279 14.8% - 0s H 83 37 59.0000000 65.71717 11.4% 54.0 0s 1114 332 60.50000 32 95 59.00000 63.91453 8.33% 44.7 5s * 2107 365 30 60.0000000 62.77273 4.62% 38.4 6s Cutting planes: Gomory: 5 Zero half: 65 Mod-K: 1 Explored 3008 nodes (106400 simplex iterations) in 7.95 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.000000000000e+01, best bound 6.000000000000e+01, gap 0.0%