Build (method = -2) #dp: 90 Step-3' Graph: 25 vertices and 68 arcs (0.00s) Step-4' Graph: 7 vertices and 32 arcs (0.00s) #V4/#V3 = 0.28 #A4/#A3 = 0.47 Ready! (0.00s) Optimize a model with 27 rows, 33 columns and 89 nonzeros Presolve removed 23 rows and 27 columns Presolve time: 0.00s Presolved: 4 rows, 6 columns, 14 nonzeros Variable types: 0 continuous, 6 integer (0 binary) Found heuristic solution: objective 1174.0000000 Found heuristic solution: objective 1173.0000000 Found heuristic solution: objective 1172.0000000 Found heuristic solution: objective 1076.0000000 Optimize a model with 4 rows, 6 columns and 14 nonzeros Presolved: 4 rows, 6 columns, 14 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 6.000e+00 Factor NZ : 1.000e+01 Factor Ops : 3.000e+01 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.18256410e+03 7.00069800e+02 1.36e+02 1.11e-16 6.37e+01 0s 1 1.12476628e+03 1.02433880e+03 2.41e-01 1.11e-16 7.76e+00 0s 2 1.07665012e+03 1.06999527e+03 9.85e-03 2.08e-17 5.12e-01 0s 3 1.07604336e+03 1.07595761e+03 2.84e-14 2.22e-16 6.60e-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 1.076000000000e+03, best bound 1.076000000000e+03, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 1076 Solution: 57 x [12] 92 x [7] 96 x [4] 50 x [9] 71 x [8] 19 x [14] 86 x [5] 82 x [1] 29 x [13] 30 x [16] 26 x [2, 16] 75 x [10] 95 x [6] 21 x [11] 42 x [11, 19] 72 x [3, 18] 67 x [15, 17] 19 x [20] 31 x [15, 20] 16 x [3, 20]