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bounds

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
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Nikolaj Bjorner 2021-07-13 14:40:32 +02:00
parent 0752b1385c
commit 82e477ac02
1 changed files with 3 additions and 0 deletions
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3
src/ast/rewriter/seq_axioms.cpp
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@ -806,9 +806,12 @@ namespace seq {
expr_ref ge10k(m), ge10k1(m), eq(m);
bv_util bv(m);
sort* bv_sort = b->get_sort();
unsigned sz = bv.get_bv_size(bv_sort);
rational pow(1);
for (unsigned i = 1; i < k; ++i)
pow *= 10;
if (pow * 10 >= rational::power_of_two(sz))
return; // TODO: add conflict when k is too large or avoid overflow bounds and limits
ge10k = bv.mk_ule(bv.mk_numeral(pow, bv_sort), b);
ge10k1 = bv.mk_ule(bv.mk_numeral(pow * 10, bv_sort), b);
eq = m.mk_eq(seq.str.mk_length(seq.str.mk_ubv2s(b)), a.mk_int(k));