Build (method = -2) #dp: 515 Step-3' Graph: 126 vertices and 371 arcs (0.00s) Step-4' Graph: 60 vertices and 239 arcs (0.00s) #V4/#V3 = 0.48 #A4/#A3 = 0.64 Ready! (0.00s) Optimize a model with 80 rows, 240 columns and 604 nonzeros Presolve removed 19 rows and 29 columns Presolve time: 0.00s Presolved: 61 rows, 211 columns, 554 nonzeros Variable types: 0 continuous, 211 integer (24 binary) Found heuristic solution: objective 97.0000000 Optimize a model with 61 rows, 211 columns and 554 nonzeros Presolved: 61 rows, 211 columns, 554 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 3.710e+02 Factor NZ : 1.163e+03 Factor Ops : 2.609e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 2.48198454e+02 -2.77116051e+03 1.17e+03 1.11e-16 3.14e+01 0s 1 1.84804125e+02 -1.01777937e+03 1.56e+02 6.66e-16 5.41e+00 0s 2 1.17873832e+02 -1.89930761e+02 1.17e+01 3.44e-15 8.43e-01 0s 3 8.87057043e+01 1.45991808e+01 6.17e-01 9.99e-16 1.75e-01 0s 4 7.73734525e+01 4.86752782e+01 1.71e-01 6.66e-16 6.70e-02 0s 5 7.20884412e+01 6.07904694e+01 6.45e-02 3.69e-16 2.63e-02 0s 6 7.01922895e+01 6.78845613e+01 1.42e-02 3.79e-16 5.38e-03 0s 7 7.00019267e+01 6.99963941e+01 2.96e-04 4.10e-16 1.37e-05 0s 8 7.00000023e+01 6.99999964e+01 6.75e-13 3.47e-16 1.37e-08 0s 9 7.00000000e+01 7.00000000e+01 4.26e-13 4.44e-16 1.38e-14 0s Barrier solved model in 9 iterations and 0.00 seconds Optimal objective 7.00000000e+01 Root relaxation: objective 7.000000e+01, 122 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 70.0000000 70.00000 0.0% - 0s Explored 0 nodes (122 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 7.000000000000e+01, best bound 7.000000000000e+01, gap 0.0% Preprocessing time: 0.02 seconds Gurobi run time: 0.01 seconds Total run time: 0.03 seconds Objective: 70 Solution: 1 x [1, 19, 20] 1 x [2] 4 x [2, 12] 4 x [3, 11] 9 x [4, 11] 1 x [4, 14, 20] 1 x [5, 10] 11 x [5, 14, 18] 1 x [6, 11, 19] 9 x [6, 12, 19, 20] 2 x [6, 13, 15] 3 x [6, 13, 19] 7 x [6, 15, 17, 18] 6 x [7, 14, 15] 3 x [7, 15, 16] 2 x [7, 15, 16, 18] 3 x [8] 2 x [8, 9]