Build (method = -2) #dp: 358 Step-3' Graph: 79 vertices and 230 arcs (0.00s) Step-4' Graph: 37 vertices and 146 arcs (0.00s) #V4/#V3 = 0.47 #A4/#A3 = 0.63 Ready! (0.00s) Optimize a model with 57 rows, 147 columns and 371 nonzeros Presolve removed 18 rows and 24 columns Presolve time: 0.00s Presolved: 39 rows, 123 columns, 325 nonzeros Variable types: 0 continuous, 123 integer (14 binary) Found heuristic solution: objective 123.0000000 Found heuristic solution: objective 116.0000000 Optimize a model with 39 rows, 123 columns and 325 nonzeros Presolved: 39 rows, 123 columns, 325 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 2.090e+02 Factor NZ : 5.290e+02 Factor Ops : 8.379e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 2.34456957e+02 -1.46100764e+03 7.13e+02 1.11e-16 3.06e+01 0s 1 1.80149758e+02 -5.14849608e+02 1.18e+02 5.55e-16 5.90e+00 0s 2 1.31935896e+02 -9.05378994e+01 6.29e+00 5.11e-15 9.83e-01 0s 3 1.13157373e+02 3.21205261e+01 5.06e-01 1.55e-15 3.24e-01 0s 4 1.06817670e+02 8.60987764e+01 1.37e-01 6.66e-16 8.23e-02 0s 5 1.03290594e+02 1.00401311e+02 2.65e-02 4.44e-16 1.15e-02 0s 6 1.03001108e+02 1.02998191e+02 5.82e-05 4.02e-16 1.18e-05 0s 7 1.03000000e+02 1.03000000e+02 5.88e-11 6.69e-16 1.20e-11 0s Barrier solved model in 7 iterations and 0.00 seconds Optimal objective 1.03000000e+02 Root relaxation: objective 1.030000e+02, 70 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 103.0000000 103.00000 0.0% - 0s Explored 0 nodes (70 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 1.030000000000e+02, best bound 1.030000000000e+02, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.01 seconds Total run time: 0.02 seconds Objective: 103 Solution: 6 x [1] 1 x [2] 1 x [2, 19] 4 x [3] 4 x [3, 17] 5 x [4, 14] 3 x [4, 15] 4 x [4, 16] 7 x [4, 17] 2 x [4, 19] 6 x [5, 18] 11 x [6, 13] 4 x [6, 20] 5 x [7, 15, 20] 11 x [8, 15] 4 x [8, 20] 4 x [9] 1 x [9, 12] 2 x [9, 14] 1 x [9, 17] 4 x [9, 17, 20] 6 x [10, 11] 7 x [11, 13]