20131214 
wenzelm 
20131214 
proper context for basic Simplifier operations: rewrite_rule, rewrite_goals_rule, rewrite_goals_tac etc.;
clarified tool context in some boundary cases;

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20130727 
wenzelm 
20130727 
standardized aliases;

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20130530 
wenzelm 
20130530 
standardized aliases;

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20130418 
wenzelm 
20130418 
simplifier uses proper Proof.context instead of historic type simpset;

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20121031 
blanchet 
20121031 
soft SMT timeout

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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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20120214 
wenzelm 
20120214 
normalized aliases;

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20111107 
boehmes 
20111107 
try different alternatives in discharging extra assumptions when schematic theorems obtained from lambdalifting can be instantiated in different ways

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20111107 
boehmes 
20111107 
replace higherorder matching against schematic theorem with dedicated reconstruction method

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20111028 
wenzelm 
20111028 
tuned Named_Thms: proper binding;

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20110912 
nipkow 
20110912 
new fastforce replacing fastsimp  less confusing name

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20110825 
boehmes 
20110825 
improved completeness and efficiency of Z3 proof reconstruction, especially by an improved handling of Skolemization

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20110808 
wenzelm 
20110808 
misc tuning  eliminated oldfashioned rep_thm;

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20110718 
boehmes 
20110718 
allow rules with premises to be declared as z3_rule (to circumvent incompleteness of Z3 proof reconstruction)

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20110526 
boehmes 
20110526 
iteratively deepen abstractions to avoid rare Z3 proof reconstruction failures, e.g. when pulling ifthenelse from below uninterpreted constants (suggested by Jasmin Christian Blanchette)

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20110513 
wenzelm 
20110513 
proper Proof.context for classical tactics;
reduced claset to snapshot of classical context;
discontinued clasimpset;

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20110416 
wenzelm 
20110416 
modernized structure Proof_Context;

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20110408 
boehmes 
20110408 
corrected order of steps in Z3 proof reconstruction for elimination of unused quantified variables: first try to eliminate unused variables, then skip over used variables

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20110401 
boehmes 
20110401 
save reflexivity steps in discharging Z3 Skolemization hypotheses

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20110401 
boehmes 
20110401 
reimplemented proof reconstruction for Z3 skolemization: do not explicitly construct definitions for Skolem constants, and let higherorder resolution do most of the work in the end

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20110309 
boehmes 
20110309 
finished and tested Z3 proof reconstruction for injective functions;
only treat variables as atomic, and especially abstract constants (Isabelle's interpretation of these constants is most likely not known to Z3 and thus irrelevant for the proof)

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20110103 
boehmes 
20110103 
reimplemented support for datatypes (including records and typedefs);
added test cases for datatypes, records and typedefs

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20101220 
boehmes 
20101220 
avoid ML structure aliases (especially singleletter abbreviations)

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20101215 
boehmes 
20101215 
the functions term_of and prop_of are also needed in earlier stages, not only for Z3 proof reconstruction, so they really belong in SMT_Utils

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20101215 
boehmes 
20101215 
fixed proof reconstruction for lambdalifted problems (which broke when the lambdalifting code was changed to operate on terms instead of on theorems)

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20101215 
boehmes 
20101215 
adapted the Z3 proof parser to recent changes in Z3's proof format;
keep the proof steps in an ordered list instead of in an Inttab (simplifies proof reconstruction code)

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

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20101124 
boehmes 
20101124 
be more liberal in reconstructing congruences from Z3 (sometimes the symmetric version of a premise is needed)

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20101122 
boehmes 
20101122 
added support for quantifier weight annotations

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20101122 
boehmes 
20101122 
share and use more utility functions;
slightly reduced complexity for Z3 proof rule 'rewrite'

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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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20101108 
boehmes 
20101108 
better modularization: moved SMT configuration options and diagnostics as well as SMT failure and exception into separate structures (both of which are loaded first and consequently are available to other SMT structures)

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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 
added a mode to only filter assumptions used in a Z3 proof (in which no proof reconstruction is performed)

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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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20100920 
wenzelm 
20100920 
renamed structure PureThy to Pure_Thy and moved most content to Global_Theory, to emphasize that this is globalonly;

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20100901 
haftmann 
20100901 
replaced Table.map' by Table.map

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

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20100526 
boehmes 
20100526 
try logical and theory abstraction before full abstraction (avoids warnings of linarith)

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20100515 
wenzelm 
20100515 
incorporated further conversions and conversionals, after some minor tuning;

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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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