NEWS

   1 This file contains a summary of important user-visible changes.
   2
   3 Changes since 1.2
   4 =================
   5
   6 * SMT-LIB support for abs, to_real, to_int, is_int
   7 * Expr::substitute() now capable of substituting operators (e.g.,
   8   function symbols under an APPLY_UF)
   9 * Support in linear logics for /, div, and mod by constants.
  10 * Support for TPTP's TFF and TFA formats.
  11 * We no longer permit model or proof generation if there's been an
  12   intervening push/pop.
  13 * Increased compliance to SMT-LIBv2, numerous bugs and usability issues
  14   resolved.
  15 * New :command-verbosity SMT option to silence success and error messages
  16   on a per-command basis.  API changes to Command infrastructure to support.
  17 * A new theory of strings.  Currently, only word equations are supported.
  18
  19 Changes since 1.1
  20 =================
  21
  22 * Real arithmetic now has three simplex solvers for exact precision linear
  23   arithmetic: the classical dual solver and two new solvers based on
  24   techniques for minimizing the sum of infeasibilities. GLPK can now be used
  25   as a heuristic backup to the exact precision solvers.  GLPK must be enabled
  26   at configure time. See --help for more information on enabling these solvers.
  27 * added support for "bit0" and "bit1" bitvector constants in SMT-LIB v1.2
  28 * support for theory "alternates": new ability to prototype new decision
  29   procedures that are selectable at runtime
  30 * various bugfixes
  31
  32 Changes since 1.0
  33 =================
  34
  35 * bit-vector solver now has a specialized decision procedure for unsigned bit-
  36   vector inequalities
  37 * numerous important bug fixes, performance improvements, and usability
  38   improvements
  39 * support for multiline input in interactive mode
  40 * Win32-building support via mingw
  41 * SMT-LIB get-model output now is easier to machine-parse: contains (model...)
  42 * user patterns for quantifier instantiation are now supported in the
  43   SMT-LIBv1.2 parser
  44 * --finite-model-find was incomplete when using --incremental, now fixed
  45 * the E-matching procedure is slightly improved
  46 * Boolean terms are now supported in datatypes
  47 * tuple and record support have been added to the compatibility library
  48 * driver verbosity change: for printing all commands as they're executed, you
  49   now need verbosity level >= 3 (e.g., -vvv) instead of level 1 (-v).  This
  50   allows tracing the solver's activities (with -v and -vv) without having too
  51   much output.
  52 * to make CVC4 quieter in abnormal (e.g., "warning" conditions), you can
  53   use -q.  Previously, this would silence all output (including "sat" or
  54   "unsat") as well.  Now, single -q silences messages and warnings, and
  55   double -qq silences all output (except on exception or signal).
  56
  57 -- Morgan Deters <mdeters@cs.nyu.edu>  Wed, 03 Apr 2013 13:06:35 -0400