BICGSTAB                    ! Iterative method: BiCGSTAB BiCG CGS RGMRES BiCGSTABL CG
CSR                         ! Storage format CSR COO JAD 
30                          ! IDIM; domain size is idim**3
2                           ! ISTOPC
00800                       ! ITMAX
01                          ! ITRACE
30                          ! IRST     (restart for RGMRES and BiCGSTABL) 
1.d-6                       ! EPS
2L-M-RAS-S-D4               ! Longer descriptive name for preconditioner (up to 20 chars) 
ML                          ! Preconditioner NONE  DIAG  BJAC  AS ML
0                           ! Number of overlap layers for AS preconditioner at finest level
HALO                        ! Restriction operator NONE HALO 
NONE                        ! Prolongation operator NONE SUM AVG
ILU                         ! Subdomain solver ILU MILU ILUT UMF SLU 
1                           ! Level-set N for ILU(N)
1.d-4                       ! Threshold T for ILU(T,P) 
3                           ! Number of levels in a multilevel preconditioner
SMOOTH                      ! Kind of aggregation: RAW,  SMOOTH 
DEC                         ! Type of aggregation DEC SYMDEC GLB
MULT                        ! Type of multilevel correction: ADD MULT
POST                        ! Side of multiplicative correction PRE POST BOTH (ignored for ADD)
DIST                        ! Coarse level: matrix distribution DIST  REPL           
SLU                         ! Coarse level: solver  ILU  ILUT UMF SLU  SLUDIST
0                           ! Coarse level: Level-set N for ILU(N)
1.d-4                       ! Coarse level: Threshold T for ILU(T,P) 
4                           ! Coarse level: Number of Jacobi sweeps 
-1.0d0                      ! Smoother Omega: if < 0 means library choice.