Build (method = -2) #dp: 337 Step-3' Graph: 29 vertices and 103 arcs (0.00s) Step-4' Graph: 15 vertices and 75 arcs (0.00s) #V4/#V3 = 0.52 #A4/#A3 = 0.73 Ready! (0.00s) Optimize a model with 52 rows, 76 columns and 202 nonzeros Presolve removed 39 rows and 46 columns Presolve time: 0.00s Presolved: 13 rows, 30 columns, 72 nonzeros Variable types: 0 continuous, 30 integer (7 binary) Found heuristic solution: objective 38.0000000 Found heuristic solution: objective 36.0000000 Optimize a model with 13 rows, 30 columns and 72 nonzeros Presolve removed 1 rows and 1 columns Presolved: 12 rows, 29 columns, 70 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 2.100e+01 Factor NZ : 7.800e+01 Factor Ops : 6.500e+02 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.56604427e+02 -1.06082895e+02 2.84e+01 2.22e-16 9.93e+00 0s 1 5.24339916e+01 -1.00153031e+01 1.47e+00 2.78e-16 1.19e+00 0s 2 4.19055360e+01 1.94993749e+01 1.73e-01 1.92e-15 3.71e-01 0s 3 3.57823585e+01 3.13721781e+01 2.13e-03 1.78e-15 7.23e-02 0s 4 3.35712137e+01 3.29733233e+01 1.86e-04 5.55e-16 9.80e-03 0s 5 3.35073975e+01 3.34932503e+01 5.48e-06 1.11e-15 2.32e-04 0s 6 3.35000000e+01 3.34999999e+01 5.88e-11 8.55e-16 1.60e-09 0s 7 3.35000000e+01 3.35000000e+01 5.28e-15 1.22e-15 1.62e-15 0s Barrier solved model in 7 iterations and 0.00 seconds Optimal objective 3.35000000e+01 Root relaxation: objective 3.350000e+01, 14 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 33.50000 0 1 36.00000 33.50000 6.94% - 0s H 0 0 34.0000000 33.50000 1.47% - 0s Explored 0 nodes (15 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 3.400000000000e+01, best bound 3.400000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 34 Solution: 1 x [37] 1 x [36] 1 x [35] 3 x [34] 1 x [33] 2 x [32] 2 x [31] 1 x [30] 1 x [29] 3 x [28] 1 x [1, 27] 1 x [26] 1 x [3, 25] 1 x [2, 24] 1 x [4, 23] 1 x [5, 22] 2 x [7, 21] 1 x [8, 20] 1 x [9, 19] 1 x [7, 19] 1 x [10, 18] 1 x [4, 17] 1 x [12, 16] 1 x [13, 15] 1 x [14, 14] 1 x [12] 1 x [6, 11]