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fixes and performance improvements for interp and duality

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This commit is contained in:
Ken McMillan 2014-10-30 17:22:34 -07:00
parent 61905a10db
commit a6f58bdd17
5 changed files with 88 additions and 45 deletions
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6
src/interp/iz3mgr.cpp
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@ -778,6 +778,8 @@ int iz3mgr::occurs_in(ast var, ast e){
bool iz3mgr::solve_arith(const ast &v, const ast &x, const ast &y, ast &res){
if(occurs_in(v,y))
return false;
if(op(x) == Plus){
int n = num_args(x);
for(int i = 0; i < n; i++){
@ -801,8 +803,8 @@ iz3mgr::ast iz3mgr::cont_eq(stl_ext::hash_set<ast> &cont_eq_memo, bool truth, as
return ast();
cont_eq_memo.insert(e);
if(!truth && op(e) == Equal){
if(arg(e,0) == v) return(arg(e,1));
if(arg(e,1) == v) return(arg(e,0));
if(arg(e,0) == v && !occurs_in(v,arg(e,1))) return(arg(e,1));
if(arg(e,1) == v && !occurs_in(v,arg(e,0))) return(arg(e,0));
ast res;
if(solve_arith(v,arg(e,0),arg(e,1),res)) return res;
if(solve_arith(v,arg(e,1),arg(e,0),res)) return res;