Better handling of "out of memory" in particular from CVC3

drivers/cvc3_bare.drv

@@ -7,8 +7,8 @@ filename "%f-%t-%g.cvc"
 
 (* 'fail' must be before 'valid'; otherwise it is ignored *)
 fail "Parse Error: \\(.*\\)" "\\1"
-valid "Valid."
-unknown "Unknown." ""
+valid "Valid\\."
+unknown "Unknown\\." ""
 outofmemory "Out of memory\\|std::bad_alloc"
 time "why3cpulimit time : %s s"
 

src/driver/call_provers.ml

@@ -181,10 +181,10 @@ let call_on_file ~command ?(timelimit=0) ?(memlimit=0)
         let ans = match ret with
           | Unix.WSTOPPED n ->
               Debug.dprintf debug "Call_provers: stopped by signal %d@." n;
-              HighFailure
+              grep out regexps
           | Unix.WSIGNALED n ->
               Debug.dprintf debug "Call_provers: killed by signal %d@." n;
-              HighFailure
+              grep out regexps
           | Unix.WEXITED n ->
               Debug.dprintf debug "Call_provers: exited with status %d@." n;
               (try List.assoc n exitcodes with Not_found -> grep out regexps)