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add an assert test_find_b_c()

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Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
This commit is contained in:
Lev Nachmanson 2019-12-13 20:43:22 -10:00
parent 2fbb4cac9d
commit 9661f75246
2 changed files with 25 additions and 7 deletions
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24
src/math/lp/nla_grobner.cpp
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@ -429,7 +429,9 @@ bool grobner::simplify_source_target(equation * source, equation * target) {
TRACE("grobner_d", tout << "no simplification\n";);
return false;
}
void grobner::process_simplified_target(equation* target, ptr_buffer<equation>& to_remove) {
if (is_trivial(target)) {
to_remove.push_back(target);
@ -597,6 +599,7 @@ bool grobner::find_b_c(const nex* ab, const nex* ac, nex_mul*& b, nex_mul*& c) {
nex_mul *a = divide_ignore_coeffs_perform(m_nex_creator.clone(ab), b);
SASSERT(ab->get_degree() == a->get_degree() + b->get_degree());
SASSERT(ac->get_degree() == a->get_degree() + c->get_degree());
SASSERT(test_find_b_c(ab, ac, b, c));
return true;
}
@ -700,11 +703,9 @@ bool grobner::compute_basis_loop(){
while (!done()) {
if (compute_basis_step()) {
TRACE("grobner", tout << "progress in compute_basis_step\n";);
TRACE("grobner_stats", print_stats(tout););
return true;
}
TRACE("grobner", tout << "continue compute_basis_loop\n";);
TRACE("grobner_stats", print_stats(tout););
}
TRACE("grobner", tout << "return false from compute_basis_loop\n";);
TRACE("grobner_stats", print_stats(tout););
@ -816,4 +817,19 @@ std::ostream& grobner::display_dependency(std::ostream& out, ci_dependency* dep)
}
return out;
}
#ifdef Z3DEBUG
bool grobner::test_find_b(const nex* ab, const nex_mul* b) {
nex_mul& ab_clone = m_nex_creator.clone(ab)->to_mul();
nex_mul * a= divide_ignore_coeffs_perform(&ab_clone, b);
ab_clone.coeff() = rational(1);
SASSERT(b->coeff().is_one());
nex * m = m_nex_creator.mk_mul(a, m_nex_creator.clone(b));
m = m_nex_creator.simplify(m);
return m_nex_creator.equal(m, &ab_clone);
}
bool grobner::test_find_b_c(const nex* ab, const nex* ac, const nex_mul* b, const nex_mul* c) {
return test_find_b(ab, b) && test_find_b(ac, c);
}
#endif