Build (method = -2) #dp: 201 Step-3' Graph: 28 vertices and 93 arcs (0.00s) Step-4' Graph: 7 vertices and 51 arcs (0.00s) #V4/#V3 = 0.25 #A4/#A3 = 0.55 Ready! (0.00s) Optimize a model with 38 rows, 52 columns and 147 nonzeros Presolve removed 29 rows and 31 columns Presolve time: 0.00s Presolved: 9 rows, 21 columns, 53 nonzeros Variable types: 0 continuous, 21 integer (5 binary) Found heuristic solution: objective 42.0000000 Found heuristic solution: objective 36.0000000 Optimize a model with 9 rows, 21 columns and 53 nonzeros Presolved: 9 rows, 21 columns, 53 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.500e+01 Factor NZ : 4.500e+01 Factor Ops : 2.850e+02 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 6.90476696e+01 -1.25315546e+01 5.65e+00 2.22e-16 3.16e+00 0s 1 4.19166478e+01 2.32370920e+01 8.07e-02 2.22e-16 4.16e-01 0s 2 3.62934945e+01 3.37283902e+01 7.01e-05 2.22e-16 5.58e-02 0s 3 3.55100497e+01 3.52867330e+01 3.54e-06 2.22e-16 4.85e-03 0s Barrier performed 3 iterations in 0.00 seconds Objective cutoff exceeded Root relaxation: cutoff, 0 iterations, 0.00 seconds Explored 0 nodes (0 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 3.600000000000e+01, best bound 3.600000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 36 Solution: 1 x [31] 1 x [30] 2 x [29] 4 x [28] 1 x [27] 1 x [26] 2 x [25] 5 x [24] 1 x [23] 2 x [22] 1 x [21] 2 x [2, 20] 1 x [3, 19] 2 x [6, 18] 1 x [5, 18] 1 x [4, 17] 1 x [1, 16] 1 x [7, 15] 1 x [12, 14] 1 x [10, 14] 1 x [9, 13] 1 x [11, 12] 1 x [8, 12] 1 x [1]