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working on duality and quantified arithmetic in interpolation

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Ken McMillan 2013-11-21 18:10:21 -08:00
parent 8320144af0
commit a93f8b04e5
10 changed files with 829 additions and 60 deletions
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16
src/interp/iz3mgr.cpp
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@ -815,6 +815,22 @@ iz3mgr::ast iz3mgr::subst(ast var, ast t, ast e){
return subst(memo,var,t,e);
}
iz3mgr::ast iz3mgr::subst(stl_ext::hash_map<ast,ast> &subst_memo,ast e){
std::pair<ast,ast> foo(e,ast());
std::pair<hash_map<ast,ast>::iterator,bool> bar = subst_memo.insert(foo);
ast &res = bar.first->second;
if(bar.second){
int nargs = num_args(e);
std::vector<ast> args(nargs);
for(int i = 0; i < nargs; i++)
args[i] = subst(subst_memo,arg(e,i));
opr f = op(e);
if(f == Equal && args[0] == args[1]) res = mk_true();
else res = clone(e,args);
}
return res;
}
// apply a quantifier to a formula, with some optimizations
// 1) bound variable does not occur -> no quantifier
// 2) bound variable must be equal to some term -> substitute