20150306 
wenzelm 
20150306 
Thm.cterm_of and Thm.ctyp_of operate on local context;

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20150304 
wenzelm 
20150304 
clarified signature;

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20140917 
blanchet 
20140917 
added interface for CVC4 extensions

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20140828 
blanchet 
20140828 
renamed new SMT module from 'SMT2' to 'SMT'

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20121005 
blanchet 
20121005 
newer versions of Z3 call it "Bool" not "bool"

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20120523 
boehmes 
20120523 
extend the Z3 proof parser to accept polyadic addition (on integers and reals) due to changes introduced in Z3 4.0

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20120215 
wenzelm 
20120215 
renamed Thm.capply to Thm.apply, and Thm.cabs to Thm.lambda in conformance with similar operations in structure Term and Logic;

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20110416 
wenzelm 
20110416 
modernized structure Proof_Context;

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20110214 
boehmes 
20110214 
more explicit errors to inform users about problems related to SMT solvers;
fall back to remote SMT solver (if local version does not exist);
extend the Z3 proof parser to accommodate for slight changes introduced by Z3 2.18

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20110202 
boehmes 
20110202 
avoid ML structure aliases (especially singleletter abbreviations)

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20110108 
wenzelm 
20110108 
Ord_List.merge convenience;

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20101220 
boehmes 
20101220 
reintroduced support for nonlinear multiplication in Z3 (overriding the builtin linear multiplication of the SMTLIB class of solvers)

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20101219 
boehmes 
20101219 
only linear occurrences of multiplication are treated as builtin (SMT solvers only support linear arithmetic in general);
hide internal constants z3div and z3mod;
rewrite div/mod to z3div/z3mod instead of adding extra rules characterizing div/mod in terms of z3div/z3mod

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20101215 
boehmes 
20101215 
reimplemented etaexpansion, lambdalifting, and explicit application on terms (exploiting the control over the term structure);
abolished SMT interface concept in favor of solver classes (now also the translation configuration is stored in the context);
proof reconstruction is now expected to return a theorem stating False (and hence needs to discharge all hypothetical definitions);
builtin functions carry additionally their arity and their most general type;
slightly generalized the definition of fun_app

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20101215 
boehmes 
20101215 
reordered SMT normalization code (etanormalization, lambda abstractions and partial functions will be dealt with on the term level);
added simple trigger inference mechanism;
added syntactic checks for triggers and quantifier weights;
factored out the normalization of special quantifiers (used to be in the etanormalization part);
normalization now unfolds abs/min/max (not SMTLIBspecific);
rules for pairs and function update are not anymore added automatically to the problem;
more aggressive rewriting of natural number operations into integer operations (minimizes the number of remaining natint coercions);
normalizations are now managed in a classbased manner (similar to builtin symbols)

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20101215 
boehmes 
20101215 
moved SMT classes and dictionary functions to SMT_Utils

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20101208 
boehmes 
20101208 
be more flexible: store SMT builtin symbols in generic contexts (not in theory contexts)

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20101207 
boehmes 
20101207 
centralized handling of builtin types and constants;
also store types and constants which are rewritten during preprocessing;
interfaces are identified by classes (supporting inheritance, at least on the level of builtin symbols);
removed term_eq in favor of type replacements: termlevel occurrences of type bool are replaced by type term_bool (only for the translation)

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20101124 
boehmes 
20101124 
be more precise: only treat constant 'distinct' applied to an explicit list as builtin

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20101122 
boehmes 
20101122 
added prove reconstruction for injective functions;
added SMT_Utils to collect frequently used functions

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20101117 
boehmes 
20101117 
use the const antiquotation for constants (this checks that the constant is declared, whereas the more general term antiquotation treats undeclared names as free variable)

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20101112 
boehmes 
20101112 
preliminary support for newer versions of Z3

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20101029 
boehmes 
20101029 
introduced SMT.distinct as a representation of the solvers' builtin predicate; check that SMT.distinct is always applied to an explicit list

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20101026 
boehmes 
20101026 
joined setup of SMT solvers in one place; turned Z3specific options into SMT options (renamed configuration options from z3_* to smt_*); more detailed SMT exception; improved SMT filter interface

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20101026 
boehmes 
20101026 
keep track of theorems initially given to SMT (even if they are rewritten); provide interface to filter theorems necessary for SMT proofs

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20100924 
wenzelm 
20100924 
modernized structure Ord_List;

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20100913 
boehmes 
20100913 
added preliminary support for SMT datatypes (for now restricted to tuples and lists); only the Z3 interface (in oracle mode) makes use of it, there is especially no Z3 proof reconstruction support for datatypes yet

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20100828 
haftmann 
20100828 
formerly unnamed infix equality now named HOL.eq

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20100827 
haftmann 
20100827 
formerly unnamed infix conjunction and disjunction now named HOL.conj and HOL.disj

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20100826 
haftmann 
20100826 
formerly unnamed infix impliciation now named HOL.implies

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20100527 
boehmes 
20100527 
renamed constant "apply" to "fun_app" (which is closer to the related "fun_upd")

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20100527 
boehmes 
20100527 
use Z3's builtin support for div and mod

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20100512 
boehmes 
20100512 
layered SMT setup, adapted SMT clients, added further tests, made Z3 proof abstraction configurable

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20100512 
boehmes 
20100512 
integrated SMT into the HOL image

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