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|
(**************************************************************************)
(* *)
(* SMTCoq *)
(* Copyright (C) 2011 - 2022 *)
(* *)
(* See file "AUTHORS" for the list of authors *)
(* *)
(* This file is distributed under the terms of the CeCILL-C licence *)
(* *)
(**************************************************************************)
open Format
type result = Sat | Unsat
type t = {
pid : int;
stdin : Unix.file_descr;
stdout : Unix.file_descr;
stderr : Unix.file_descr;
lexbuf : Lexing.lexbuf;
}
let create cmd =
let executable = cmd.(0) in
(* Create pipes for input, output and error output *)
let stdin_in, stdin_out = Unix.pipe () in
let stdout_in, stdout_out = Unix.pipe () in
let stderr_in, stderr_out = Unix.pipe () in
(* Create solver process *)
let pid =
Unix.create_process
executable
cmd
stdin_in
stdout_out
stderr_out
in
(* Close our end of the pipe which has been duplicated by the
process *)
Unix.close stdin_in;
Unix.close stdout_out;
Unix.close stderr_out;
(* Get an output channel to read from solver's stdout *)
let stdout_ch = Unix.in_channel_of_descr stdout_in in
let lexbuf = Lexing.from_channel stdout_ch in
(* Create the solver instance *)
{ pid;
stdin = stdin_out; stdout = stdout_in; stderr = stderr_in; lexbuf }
let kill s =
try
Unix.close s.stdin;
Unix.close s.stdout;
Unix.close s.stderr;
Unix.kill s.pid Sys.sigkill;
with _ -> ()
let read_response { lexbuf } =
SExprParser.sexp SExprLexer.main lexbuf
let error s sexp =
kill s;
CoqInterface.error (asprintf "Solver error: %a." SExpr.print sexp)
let read_success s =
match SExprParser.sexp SExprLexer.main s.lexbuf with
| SExpr.Atom "success" -> ()
| r -> error s r
(* let no_response _ = () *)
let read_check_result s =
match SExprParser.sexp SExprLexer.main s.lexbuf with
| SExpr.Atom "sat" -> Sat
| SExpr.Atom "unsat" -> Unsat
| SExpr.Atom "unknown" -> CoqInterface.error ("Solver returned uknown.")
| r -> error s r
let send_command s cmd read =
eprintf "%s@." cmd;
(* let err_p1 = Unix.((fstat s.stderr).st_size) in *)
try
let in_ch = Unix.out_channel_of_descr s.stdin in
let fmt = formatter_of_out_channel in_ch in
pp_print_string fmt cmd;
pp_print_newline fmt ();
read s
with e ->
(* After the exception, the file descriptor is invalid *)
(* let err_p2 = Unix.((fstat s.stderr).st_size) in
* let len = err_p2 - err_p1 in
* (\* Was something written to stderr? *\)
* if len <> 0 then begin
* let buf = Bytes.create err_p2 in
* Unix.read s.stderr buf 0 err_p2 |> ignore;
* let err_msg = Bytes.sub_string buf err_p1 len in
* CoqInterface.error ("Solver error: "^err_msg);
* end
* else (kill s; raise e) *)
kill s; raise e
let set_option s name b =
send_command s
(asprintf "(set-option :%s %b)" name b)
read_success
let set_logic s l =
send_command s
(sprintf "(set-logic %s)" l)
read_success
let declare_sort s name arity =
send_command s
(asprintf "(declare-sort %s %d)" name arity)
read_success
let declare_fun s name args ret =
send_command s
(asprintf "(declare-fun %s (%a) %s)"
name
(fun fmt -> List.iter (fprintf fmt "%s ")) args
ret)
read_success
let assume s f =
send_command s
(sprintf "(assert %s)" f)
read_success
let check_sat s =
send_command s "(check-sat)" read_check_result
let get_proof s process_proof =
send_command s "(get-proof)" (fun s -> process_proof s.lexbuf)
let get_model s =
send_command s "(get-model)" read_response
let quit s =
try
send_command s "(exit)" read_success;
with Unix.Unix_error _ -> ();
kill s
|
