Build (method = -2) #dp: 56 Step-3' Graph: 13 vertices and 35 arcs (0.00s) Step-4' Graph: 6 vertices and 21 arcs (0.00s) #V4/#V3 = 0.46 #A4/#A3 = 0.60 Ready! (0.00s) Optimize a model with 16 rows, 22 columns and 59 nonzeros Presolve removed 8 rows and 8 columns Presolve time: 0.00s Presolved: 8 rows, 14 columns, 37 nonzeros Variable types: 0 continuous, 14 integer (1 binary) Found heuristic solution: objective 98.0000000 Found heuristic solution: objective 88.0000000 Found heuristic solution: objective 69.0000000 Found heuristic solution: objective 67.0000000 Optimize a model with 8 rows, 14 columns and 37 nonzeros Presolve removed 2 rows and 3 columns Presolved: 6 rows, 11 columns, 26 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 9.000e+00 Factor NZ : 2.100e+01 Factor Ops : 9.100e+01 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 9.16676081e+01 3.45054214e+01 7.21e+00 0.00e+00 3.35e+00 0s 1 6.95423723e+01 6.07615204e+01 3.55e-15 1.11e-16 3.67e-01 0s 2 6.71218419e+01 6.64602147e+01 0.00e+00 1.11e-16 2.76e-02 0s Barrier performed 2 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 6.700000000000e+01, best bound 6.700000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 67 Solution: 16 x [8] 11 x [6] 7 x [10] 3 x [9, 10] 10 x [1, 5] 11 x [5, 9] 5 x [3, 7] 2 x [4, 7] 1 x [2, 7] 1 x [7, 7]