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interpolation fix (add simplify_cong)

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This commit is contained in:
Ken McMillan 2014-03-24 17:21:29 -07:00
parent e3c1cdfe8c
commit c9fcf7ee96
1 changed files with 15 additions and 1 deletions
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16
src/interp/iz3proof_itp.cpp
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@ -551,8 +551,8 @@ class iz3proof_itp_impl : public iz3proof_itp {
else if(g == modpon) res = simplify_modpon(args);
else if(g == sum) res = simplify_sum(args);
else if(g == exmid) res = simplify_exmid(args);
#if 0
else if(g == cong) res = simplify_cong(args);
#if 0
else if(g == modpon) res = simplify_modpon(args);
else if(g == leq2eq) res = simplify_leq2eq(args);
else if(g == eq2leq) res = simplify_eq2leq(args);
@ -1109,6 +1109,20 @@ class iz3proof_itp_impl : public iz3proof_itp {
throw "bad exmid";
}
ast simplify_cong(const std::vector<ast> &args){
ast Aproves = mk_true(), Bproves = mk_true();
ast chain = destruct_cond_ineq(args[0],Aproves,Bproves);
rational pos;
if(is_numeral(args[1],pos)){
int ipos = pos.get_unsigned();
chain = chain_pos_add(ipos,chain);
ast Q2 = destruct_cond_ineq(args[2],Aproves,Bproves);
ast interp = contra_chain(Q2,chain);
return my_and(Aproves,my_implies(Bproves,interp));
}
throw "bad cong";
}
bool is_equivrel(const ast &p){
opr o = op(p);
return o == Equal || o == Iff;