Bonmin 1.8.8 using Cbc 2.10.5 and Ipopt 3.12.13 bonmin: bonmin.algorithm=B-OA ****************************************************************************** This program contains Ipopt, a library for large-scale nonlinear optimization. Ipopt is released as open source code under the Eclipse Public License (EPL). For more information visit http://projects.coin-or.org/Ipopt ****************************************************************************** NLP0012I Num Status Obj It time Location NLP0014I 1 OPT 0 5 0.00524 build initial OA NLP0014I 2 INFEAS 0.024970779 6 0.011611 OA decomposition OA0008I OA converged in 0.018601 seconds found solution of value 1e+50 (lower bound 1e+50 ). OA0010I Performed 1 iterations, explored 0 branch-and-bound nodes in total Cbc0031I 9 added rows had average density of 2 Cbc0013I At root node, 9 cuts changed objective from 0 to 0 in 2 passes Cbc0014I Cut generator 0 (Outer Approximation decomposition.) - 9 row cuts average 2.0 elements, 0 column cuts (0 active) Cbc0014I Cut generator 1 (Outer Approximation feasibility check.) - 0 row cuts average 0.0 elements, 0 column cuts (0 active) Cbc0014I Cut generator 2 (Outer Approximation strong branching solution check.) - 0 row cuts average 0.0 elements, 0 column cuts (0 active) Cbc0001I Search completed - best objective 1e+50, took 9 iterations and 0 nodes (0.02 seconds) Cbc0035I Maximum depth 0, 0 variables fixed on reduced cost Outer Approximation decomposition. was tried 2 times and created 9 cuts of which 0 were active after adding rounds of cuts "Finished"