Build (method = -2) #dp: 673 Step-3' Graph: 51 vertices and 155 arcs (0.00s) Step-4' Graph: 11 vertices and 75 arcs (0.00s) #V4/#V3 = 0.22 #A4/#A3 = 0.48 Ready! (0.00s) Optimize a model with 47 rows, 76 columns and 210 nonzeros Presolve removed 30 rows and 36 columns Presolve time: 0.00s Presolved: 17 rows, 40 columns, 101 nonzeros Variable types: 0 continuous, 40 integer (7 binary) Found heuristic solution: objective 34.0000000 Found heuristic solution: objective 26.0000000 Optimize a model with 17 rows, 40 columns and 101 nonzeros Presolved: 17 rows, 40 columns, 101 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 3.100e+01 Factor NZ : 1.530e+02 Factor Ops : 1.785e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 2.83214355e+02 -2.92827998e+02 4.25e+01 2.22e-16 1.85e+01 0s 1 7.13220294e+01 -9.38498207e+01 3.98e+00 6.66e-16 2.62e+00 0s 2 3.48930433e+01 6.52011762e+00 1.61e-02 7.33e-15 3.23e-01 0s 3 2.65998846e+01 1.66294259e+01 2.18e-04 2.44e-15 1.13e-01 0s 4 2.50336042e+01 2.47831482e+01 2.96e-06 3.33e-16 2.85e-03 0s 5 2.50000004e+01 2.49999959e+01 1.10e-10 4.44e-16 5.03e-08 0s 6 2.50000000e+01 2.50000000e+01 5.55e-15 3.33e-16 5.04e-14 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 2.50000000e+01 Root relaxation: objective 2.500000e+01, 19 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 25.0000000 25.00000 0.0% - 0s Explored 0 nodes (19 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 2.500000000000e+01, best bound 2.500000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 25 Solution: 1 x [13, 36] 1 x [15, 35] 1 x [12, 34] 1 x [11, 33] 2 x [19, 32] 1 x [5, 31] 1 x [4, 30] 2 x [18, 29] 2 x [16, 28] 2 x [7, 27] 1 x [22, 26] 2 x [6, 25] 1 x [2, 24] 1 x [1, 23] 1 x [2, 21] 1 x [8, 20] 1 x [9, 18] 1 x [14, 17] 2 x [3, 10]