Solution status: Optimal, Feasible, Infeasible or Inconsistent.
Solution and model are inconsistent.
The solver was able to prove that the model admits no feasible solution. Note that even a model without any constraint can be infeasible because some expressions induce implicit constraints: for instance defining sqrt(x) implicitly constrains x to be non-negative.
Solution is infeasible (some constraints are violated).
Solution is feasible but optimality was not proven.
Solution is optimal (all objective bounds are reached).