Build (method = -2) #dp: 207 Step-3' Graph: 11 vertices and 79 arcs (0.00s) Step-4' Graph: 11 vertices and 79 arcs (0.00s) #V4/#V3 = 1.00 #A4/#A3 = 1.00 Ready! (0.00s) Optimize a model with 31 rows, 80 columns and 225 nonzeros Presolve removed 11 rows and 11 columns Presolve time: 0.00s Presolved: 20 rows, 69 columns, 193 nonzeros Variable types: 0 continuous, 69 integer (10 binary) Found heuristic solution: objective 84.0000000 Found heuristic solution: objective 76.0000000 Optimize a model with 20 rows, 69 columns and 193 nonzeros Presolved: 20 rows, 69 columns, 193 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 9.500e+01 Factor NZ : 2.100e+02 Factor Ops : 2.870e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 3.38799516e+02 -5.04612560e+02 1.25e+02 1.15e-01 1.82e+01 0s 1 1.31131208e+02 -2.00749785e+02 1.39e+01 5.00e-16 3.25e+00 0s 2 7.60674533e+01 1.39206359e+01 4.64e-01 3.55e-15 4.34e-01 0s 3 5.72717129e+01 4.70455779e+01 2.94e-02 2.22e-16 6.97e-02 0s 4 5.45194239e+01 5.28557459e+01 8.48e-03 1.14e-16 1.13e-02 0s 5 5.40157206e+01 5.39400853e+01 1.12e-04 1.67e-16 5.14e-04 0s 6 5.40000037e+01 5.39999856e+01 9.30e-09 3.33e-16 1.23e-07 0s 7 5.40000000e+01 5.40000000e+01 2.13e-14 3.33e-16 1.23e-13 0s Barrier solved model in 7 iterations and 0.00 seconds Optimal objective 5.40000000e+01 Root relaxation: objective 5.400000e+01, 37 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 54.0000000 54.00000 0.0% - 0s Explored 0 nodes (37 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 5.400000000000e+01, best bound 5.400000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.02 seconds Objective: 54 Solution: 8 x [8] 2 x [6] 1 x [2] 5 x [1] 7 x [13, 14] 3 x [5, 13] 1 x [9, 10] 2 x [4, 20] 6 x [11, 20] 1 x [7, 20] 1 x [16, 17] 4 x [9, 12, 17] 3 x [3, 17] 2 x [18, 19] 1 x [15, 18] 2 x [5, 9, 18] 4 x [3, 5, 18] 1 x [4, 9, 11]