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working on model extraction

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2023-12-11 12:53:51 -08:00
parent fbecbd7d70
commit 45b0be3b37
2 changed files with 16 additions and 13 deletions
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10
src/sat/smt/polysat_internalize.cpp
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@ -347,13 +347,13 @@ namespace polysat {
unsigned sz2 = sz - arg_sz;
var2pdd(expr2enode(e)->get_th_var(get_id()));
if (arg_sz == sz)
add_clause(eq_internalize(e, arg), false);
add_clause(eq_internalize(e, arg), nullptr);
else {
sat::literal lt0 = ctx.mk_literal(bv.mk_slt(arg, bv.mk_numeral(0, arg_sz)));
// arg < 0 ==> e = concat(arg, 1...1)
// arg >= 0 ==> e = concat(arg, 0...0)
add_clause(lt0, eq_internalize(e, bv.mk_concat(arg, bv.mk_numeral(rational::power_of_two(sz2) - 1, sz2))), false);
add_clause(~lt0, eq_internalize(e, bv.mk_concat(arg, bv.mk_numeral(0, sz2))), false);
add_clause(lt0, eq_internalize(e, bv.mk_concat(arg, bv.mk_numeral(rational::power_of_two(sz2) - 1, sz2))), nullptr);
add_clause(~lt0, eq_internalize(e, bv.mk_concat(arg, bv.mk_numeral(0, sz2))), nullptr);
}
}
@ -364,10 +364,10 @@ namespace polysat {
unsigned sz2 = sz - arg_sz;
var2pdd(expr2enode(e)->get_th_var(get_id()));
if (arg_sz == sz)
add_clause(eq_internalize(e, arg), false);
add_clause(eq_internalize(e, arg), nullptr);
else
// e = concat(arg, 0...0)
add_clause(eq_internalize(e, bv.mk_concat(arg, bv.mk_numeral(0, sz2))), false);
add_clause(eq_internalize(e, bv.mk_concat(arg, bv.mk_numeral(0, sz2))), nullptr);
}
void solver::internalize_div_rem(app* e, bool is_div) {