Build (method = -2) #dp: 459 Step-3' Graph: 33 vertices and 204 arcs (0.00s) Step-4' Graph: 26 vertices and 190 arcs (0.00s) #V4/#V3 = 0.79 #A4/#A3 = 0.93 Ready! (0.00s) Optimize a model with 59 rows, 191 columns and 527 nonzeros Presolve removed 27 rows and 45 columns Presolve time: 0.00s Presolved: 32 rows, 146 columns, 384 nonzeros Variable types: 0 continuous, 146 integer (97 binary) Found heuristic solution: objective 34.0000000 Optimize a model with 32 rows, 146 columns and 384 nonzeros Presolve removed 1 rows and 1 columns Presolved: 31 rows, 145 columns, 382 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.660e+02 Factor NZ : 4.060e+02 Factor Ops : 6.636e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 8.46619599e+01 -1.20714496e+02 8.18e+01 2.21e-01 1.67e+00 0s 1 4.26107067e+01 -1.22998177e+01 6.19e+00 2.22e-16 2.41e-01 0s 2 3.21370232e+01 2.17278217e+01 1.15e-01 2.22e-16 3.62e-02 0s 3 2.92485161e+01 2.76982404e+01 6.05e-03 5.20e-04 5.32e-03 0s 4 2.90045633e+01 2.89902573e+01 7.33e-15 2.43e-16 4.87e-05 0s 5 2.90000000e+01 2.90000000e+01 4.51e-14 3.33e-16 1.55e-10 0s 6 2.90000000e+01 2.90000000e+01 7.99e-15 2.24e-16 1.56e-16 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 2.90000000e+01 Root relaxation: objective 2.900000e+01, 62 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 29.0000000 29.00000 0.0% - 0s Explored 0 nodes (62 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 2.900000000000e+01, best bound 2.900000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.01 seconds Total run time: 0.01 seconds Objective: 29 Solution: 2 x [1, 33] 1 x [1, 32] 2 x [31] 1 x [3, 30] 1 x [29] 1 x [2, 29] 1 x [28] 1 x [5, 28] 1 x [6, 27] 1 x [9, 26] 1 x [9, 25] 1 x [4, 24] 3 x [23] 1 x [12, 22] 1 x [13, 21] 3 x [11, 20] 1 x [8, 19] 1 x [18] 1 x [14, 18] 1 x [7, 18] 1 x [11, 17] 1 x [10, 16] 1 x [15, 15]