Build (method = -2) #dp: 736 Step-3' Graph: 46 vertices and 147 arcs (0.00s) Step-4' Graph: 18 vertices and 91 arcs (0.00s) #V4/#V3 = 0.39 #A4/#A3 = 0.62 Ready! (0.00s) Optimize a model with 57 rows, 92 columns and 245 nonzeros Presolve removed 38 rows and 42 columns Presolve time: 0.00s Presolved: 19 rows, 50 columns, 117 nonzeros Variable types: 0 continuous, 50 integer (12 binary) Found heuristic solution: objective 30.0000000 Found heuristic solution: objective 25.0000000 Optimize a model with 19 rows, 50 columns and 117 nonzeros Presolve removed 1 rows and 1 columns Presolved: 18 rows, 49 columns, 115 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 3.300e+01 Factor NZ : 1.710e+02 Factor Ops : 2.109e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 4.39504592e+02 -3.68841532e+02 1.21e+02 1.11e-16 1.87e+01 0s 1 8.59105167e+01 -9.65997463e+01 9.01e+00 4.44e-16 2.30e+00 0s 2 4.03958852e+01 8.11556636e+00 9.64e-02 1.01e-14 3.21e-01 0s 3 3.40047654e+01 1.97643548e+01 2.82e-02 1.78e-15 1.41e-01 0s 4 2.69932053e+01 2.37152316e+01 1.16e-03 5.55e-16 3.25e-02 0s 5 2.51769333e+01 2.48842731e+01 1.49e-04 2.22e-16 2.90e-03 0s Barrier performed 5 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 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: 0.02 seconds Objective: 25 Solution: 1 x [2, 39] 2 x [1, 38] 1 x [6, 37] 1 x [5, 37] 1 x [4, 36] 1 x [7, 35] 1 x [8, 34] 1 x [11, 33] 1 x [10, 33] 1 x [12, 32] 1 x [13, 31] 1 x [9, 30] 1 x [14, 29] 1 x [3, 29] 1 x [17, 28] 1 x [16, 27] 2 x [18, 26] 1 x [15, 25] 1 x [20, 24] 2 x [19, 24] 1 x [21, 23] 1 x [22, 22]