PetscRegressor Object: 1 MPI process
  type: linear
    PetscRegressor Linear Type: ols
    Intercept=0.0857143
  Tao Object: (regressor_linear_) 1 MPI process
    type: brgn
      Regularizer weight: 0.
      BRGN Regularization Type: l2prox
      Tao Object: (tao_brgn_subsolver_) 1 MPI process
        type: bnls
          Tao Object: (tao_brgn_subsolver_tao_bnk_cg_) 1 MPI process
            type: bncg
              CG Type: ssml_bfgs
              Skipped Stepdirection Updates: 0
              Scaled gradient steps: 0
              Pure gradient steps: 0
              Not a descent direction: 0
              Line search fails: 0
              Matrix has not been preallocated yet
            TaoLineSearch Object: (tao_brgn_subsolver_tao_bnk_cg_) 1 MPI process
              type: more-thuente
              maximum function evaluations=30
              tolerances: ftol=0.0001, rtol=1e-10, gtol=0.9
              total number of function evaluations=0
              total number of gradient evaluations=0
              total number of function/gradient evaluations=0
              Termination reason: CONTINUE_ITERATING
            convergence tolerances: gatol=1e-08,             grtol=1e-08,             steptol=0.,             gttol=0.
            Residual in Function/Gradient:=0.
            Objective value=0.
            total number of iterations=0,                                    (max: 2000)
            Solver never run
          Rejected BFGS updates: 0
          CG steps: 0
          Newton steps: 1
          BFGS steps: 0
          Scaled gradient steps: 0
          Gradient steps: 0
          KSP termination reasons:
            atol: 0
            rtol: 1
            ctol: 0
            negc: 0
            dtol: 0
            iter: 0
            othr: 0
        TaoLineSearch Object: (tao_brgn_subsolver_) 1 MPI process
          type: more-thuente
          maximum function evaluations=30
          tolerances: ftol=0.0001, rtol=1e-10, gtol=0.9
          total number of function evaluations=0
          total number of gradient evaluations=0
          total number of function/gradient evaluations=1
          Termination reason: SUCCESS
        KSP Object: (tao_brgn_subsolver_tao_bnk_) 1 MPI process
          type: stcg
          maximum iterations=10000, initial guess is zero
          tolerances: relative=1e-05, absolute=1e-50, divergence=10000.
          left preconditioning
          using UNPRECONDITIONED norm type for convergence test
        PC Object: (tao_brgn_subsolver_tao_bnk_) 1 MPI process
          type: lmvm
          Mat Object: (tao_brgn_subsolver_tao_bnk_pc_lmvm_) 1 MPI process
            type: lmvmbfgs
            rows=2, cols=2
              Max. storage: 5
              Used storage: 0
              Number of updates: 0
              Number of rejects: 0
              Number of resets: 0
              J0:
                Mat Object: (tao_brgn_subsolver_tao_bnk_pc_lmvm_mat_lmvm_J0_) 1 MPI process
                  type: diagonal
                  rows=2, cols=2
                    Vec Object: 1 MPI process
                      type: seq
              Rescale type: diagonal
              Rescale history: 1
              Rescale params: alpha=1., beta=0.5, rho=1.
              Rescale convex factor: theta=0.125
          linear system matrix, which is also used to construct the preconditioner:
          Mat Object: 1 MPI process
            type: shell
            rows=2, cols=2
        total KSP iterations: 2
        convergence tolerances: gatol=1e-08,         grtol=1e-08,         steptol=0.,         gttol=0.
        Residual in Function/Gradient:=1.00074e-16
        Objective value=0.0571429
        total number of iterations=1,                                (max: 10000)
        total number of function evaluations=3,                        (max: unlimited)
        total number of function/gradient evaluations=3,            (max: unlimited)
        total number of Hessian evaluations=1
        total number of Jacobian evaluations=4
        Solution converged:          ||g(X)|| <= gatol
    convergence tolerances: gatol=1e-08,     grtol=1e-08,     steptol=0.,     gttol=0.
    Residual in Function/Gradient:=0.
    Objective value=1.15
    total number of iterations=1,                            (max: 10000)
    total number of function evaluations=3,                    (max: unlimited)
    total number of function/gradient evaluations=3,        (max: unlimited)
    total number of Hessian evaluations=1
    Solution converged:      ||g(X)|| <= gatol
Intercept is 0.085714
Coefficients are
Vec Object: 1 MPI process
  type: seq
0.4
1.42857
Predicted values are
Vec Object: 1 MPI process
  type: seq
1.11429
0.242857
0.0857143
0.642857
1.91429