Build (method = -2) #dp: 2940 Step-3' Graph: 141 vertices and 414 arcs (0.02s) Step-4' Graph: 17 vertices and 166 arcs (0.02s) #V4/#V3 = 0.12 #A4/#A3 = 0.40 Ready! (0.02s) Optimize a model with 60 rows, 167 columns and 473 nonzeros Presolve removed 3 rows and 3 columns Presolve time: 0.00s Presolved: 57 rows, 164 columns, 466 nonzeros Variable types: 0 continuous, 164 integer (36 binary) Found heuristic solution: objective 88.0000000 Found heuristic solution: objective 87.0000000 Optimize a model with 57 rows, 164 columns and 466 nonzeros Presolved: 57 rows, 164 columns, 466 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.770e+02 Factor NZ : 6.400e+02 Factor Ops : 1.195e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 2.56450678e+02 -2.78567773e+02 5.56e+01 3.58e-02 3.55e+00 0s 1 6.06703841e+01 -1.10625753e+02 1.95e-13 2.22e-16 4.94e-01 0s 2 3.73438299e+01 2.43155326e+01 3.15e-14 2.22e-16 3.65e-02 0s 3 3.33740479e+01 3.31709736e+01 9.57e-14 1.11e-16 5.67e-04 0s 4 3.33333745e+01 3.33331714e+01 3.01e-14 2.22e-16 5.67e-07 0s 5 3.33333333e+01 3.33333333e+01 6.11e-14 1.82e-16 5.67e-13 0s Barrier solved model in 5 iterations and 0.00 seconds Optimal objective 3.33333333e+01 Root relaxation: objective 3.333333e+01, 125 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 33.33333 0 4 87.00000 33.33333 61.7% - 0s H 0 0 34.0000000 33.33333 1.96% - 0s Explored 0 nodes (158 simplex iterations) in 0.01 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: 0.03 seconds Gurobi run time: 0.01 seconds Total run time: 0.04 seconds Objective: 34 Solution: 1 x [22, 38, 43] 1 x [42] 1 x [2, 6, 42] 1 x [26, 41, 41] 3 x [7, 13, 40] 4 x [12, 36, 39] 1 x [33, 37, 37] 3 x [19, 34, 35] 1 x [18, 32, 35] 2 x [21, 27, 31] 3 x [5, 8, 30] 3 x [4, 27, 29] 1 x [10, 19, 28] 3 x [1, 3, 25] 2 x [11, 14, 24] 1 x [9, 12, 23] 2 x [15, 17, 20] 1 x [4, 9, 16]