Build (method = -2) #dp: 557 Step-3' Graph: 37 vertices and 255 arcs (0.00s) Step-4' Graph: 31 vertices and 243 arcs (0.00s) #V4/#V3 = 0.84 #A4/#A3 = 0.95 Ready! (0.00s) Optimize a model with 67 rows, 244 columns and 674 nonzeros Presolve removed 32 rows and 41 columns Presolve time: 0.00s Presolved: 35 rows, 203 columns, 565 nonzeros Variable types: 0 continuous, 203 integer (150 binary) Found heuristic solution: objective 38.0000000 Found heuristic solution: objective 34.0000000 Optimize a model with 35 rows, 203 columns and 565 nonzeros Presolved: 35 rows, 203 columns, 565 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 2.470e+02 Factor NZ : 5.220e+02 Factor Ops : 9.510e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 2.84415788e+02 -1.85610113e+02 2.07e+02 1.51e-01 2.69e+00 0s 1 8.77632964e+01 -4.66896098e+01 3.62e+01 4.44e-16 5.51e-01 0s 2 4.05481360e+01 1.46147553e+01 2.99e+00 1.61e-15 7.46e-02 0s 3 3.40556092e+01 2.88534954e+01 2.59e-01 7.49e-16 1.31e-02 0s 4 3.26912646e+01 3.17498162e+01 4.42e-02 8.88e-16 2.38e-03 0s 5 3.25035234e+01 3.24863410e+01 8.33e-04 6.23e-16 4.34e-05 0s 6 3.25000001e+01 3.24999997e+01 2.00e-08 9.72e-16 1.06e-09 0s 7 3.25000000e+01 3.25000000e+01 2.31e-14 9.99e-16 1.09e-15 0s Barrier solved model in 7 iterations and 0.00 seconds Optimal objective 3.25000000e+01 Root relaxation: objective 3.250000e+01, 78 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 32.50000 0 2 34.00000 32.50000 4.41% - 0s H 0 0 33.0000000 32.50000 1.52% - 0s Explored 0 nodes (95 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 3.300000000000e+01, best bound 3.300000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.01 seconds Total run time: 0.02 seconds Objective: 33 Solution: 1 x [1, 36] 4 x [35] 1 x [34] 1 x [2, 34] 1 x [4, 33] 1 x [3, 32] 2 x [31] 3 x [30] 1 x [6, 29] 1 x [6, 28] 2 x [27] 1 x [26] 1 x [5, 25] 1 x [8, 24] 1 x [9, 23] 1 x [7, 23] 2 x [22] 1 x [11, 21] 1 x [10, 21] 1 x [12, 20] 1 x [13, 19] 1 x [14, 18] 1 x [17] 1 x [15, 16] 1 x [15, 15]