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fixing interpolation bugs

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This commit is contained in:
Ken McMillan 2013-11-01 11:03:55 -07:00
parent 81df4932fb
commit ac212ec54c
8 changed files with 336 additions and 293 deletions
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50
src/interp/iz3mgr.cpp
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@ -536,6 +536,56 @@ void iz3mgr::get_assign_bounds_coeffs(const ast &proof, std::vector<rational>& r
}
rats[i-1] = r;
}
if(rats[1].is_neg()){ // work around bug -- if all coeffs negative, negate them
for(unsigned i = 1; i < rats.size(); i++){
if(!rats[i].is_neg())
throw "Bad Farkas coefficients";
rats[i] = -rats[i];
}
}
extract_lcd(rats);
}
void iz3mgr::get_assign_bounds_rule_coeffs(const ast &proof, std::vector<ast>& coeffs){
std::vector<rational> rats;
get_assign_bounds_rule_coeffs(proof,rats);
coeffs.resize(rats.size());
for(unsigned i = 0; i < rats.size(); i++){
coeffs[i] = make_int(rats[i]);
}
}
void iz3mgr::get_assign_bounds_rule_coeffs(const ast &proof, std::vector<rational>& rats){
symb s = sym(proof);
int numps = s->get_num_parameters();
rats.resize(numps-1);
rats[0] = rational(1);
ast conseq = arg(conc(proof),0);
opr conseq_o = is_not(conseq) ? op(arg(conseq,0)) : op(conseq);
bool conseq_neg = is_not(conseq) ? (conseq_o == Leq || conseq_o == Lt) : (conseq_o == Geq || conseq_o == Gt);
for(int i = 2; i < numps; i++){
rational r;
bool ok = s->get_parameter(i).is_rational(r);
if(!ok)
throw "Bad Farkas coefficient";
{
ast con = conc(prem(proof,i-2));
ast temp = make_real(r); // for debugging
opr o = is_not(con) ? op(arg(con,0)) : op(con);
if(is_not(con) ? (o == Leq || o == Lt) : (o == Geq || o == Gt))
r = -r;
if(conseq_neg)
r = -r;
}
rats[i-1] = r;
}
if(rats[1].is_neg()){ // work around bug -- if all coeffs negative, negate them
for(unsigned i = 1; i < rats.size(); i++){
if(!rats[i].is_neg())
throw "Bad Farkas coefficients";
rats[i] = -rats[i];
}
}
extract_lcd(rats);
}