Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:24:07 2012 Optimize a model with 779 rows, 178 columns and 1558 nonzeros Presolve removed 160 rows and 0 columns Presolve time: 0.00s Presolved: 619 rows, 178 columns, 1341 nonzeros Variable types: 0 continuous, 178 integer (178 binary) Found heuristic solution: objective 53.0000000 Root relaxation: objective 7.200000e+01, 340 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 72.00000 0 134 53.00000 72.00000 35.8% - 0s 0 0 71.30128 0 177 53.00000 71.30128 34.5% - 0s 0 0 70.05607 0 176 53.00000 70.05607 32.2% - 0s H 0 0 55.0000000 70.05607 27.4% - 0s 0 0 69.48643 0 175 55.00000 69.48643 26.3% - 0s 0 0 69.10608 0 174 55.00000 69.10608 25.6% - 0s 0 0 68.65460 0 176 55.00000 68.65460 24.8% - 0s 0 0 68.42830 0 176 55.00000 68.42830 24.4% - 0s 0 0 68.29554 0 176 55.00000 68.29554 24.2% - 0s 0 0 68.14766 0 178 55.00000 68.14766 23.9% - 0s H 0 0 56.0000000 68.14766 21.7% - 0s 0 0 68.01382 0 176 56.00000 68.01382 21.5% - 0s 0 0 67.98320 0 177 56.00000 67.98320 21.4% - 0s 0 0 67.98320 0 177 56.00000 67.98320 21.4% - 0s 0 2 67.98306 0 177 56.00000 67.98306 21.4% - 0s H 30 20 58.0000000 67.88556 17.0% 59.2 0s H 329 114 60.0000000 65.77713 9.63% 44.2 0s 731 243 64.92600 15 146 60.00000 64.92600 8.21% 50.5 5s Cutting planes: Gomory: 3 Zero half: 68 Mod-K: 1 Explored 3940 nodes (132336 simplex iterations) in 9.52 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%