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some simplifications in cheap eqs

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Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
This commit is contained in:
Lev Nachmanson 2020-06-08 21:16:23 -07:00
parent 4de38d09e2
commit dd30b5e3af
5 changed files with 40 additions and 22 deletions
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2
src/smt/params/smt_params_helper.pyg
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@ -41,7 +41,7 @@ def_module_params(module_name='smt',
('bv.reflect', BOOL, True, 'create enode for every bit-vector term'),
('bv.enable_int2bv', BOOL, True, 'enable support for int2bv and bv2int operators'),
('arith.random_initial_value', BOOL, False, 'use random initial values in the simplex-based procedure for linear arithmetic'),
('arith.cheap_eqs', BOOL, True, 'true for extracting cheap equalities'),
('arith.cheap_eqs', UINT, 0, '0 - do not run, 1 - use tree, 2 - use table'),
('arith.solver', UINT, 6, 'arithmetic solver: 0 - no solver, 1 - bellman-ford based solver (diff. logic only), 2 - simplex based solver, 3 - floyd-warshall based solver (diff. logic only) and no theory combination 4 - utvpi, 5 - infinitary lra, 6 - lra solver'),
('arith.nl', BOOL, True, '(incomplete) nonlinear arithmetic support based on Groebner basis and interval propagation, relevant only if smt.arith.solver=2'),
('arith.nl.gb', BOOL, True, 'groebner Basis computation, this option is ignored when arith.nl=false, relevant only if smt.arith.solver=2'),

13
src/smt/theory_lra.cpp
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@ -1592,6 +1592,19 @@ public:
void reset_variable_values() {
m_variable_values.clear();
}
bool congruent_or_irrelevant(lpvar k, lpvar j) {
theory_var kv = lp().local_to_external(k);
if (kv == null_theory_var)
return true;
theory_var jv = lp().local_to_external(j);
if (jv == null_theory_var)
return true;
enode * n0 = get_enode(kv);
enode * n1 = get_enode(jv);
return n0->get_root() == n1->get_root();
}
void random_update() {
if (m_nla)