bv-gauss-elim: fatal failure at preprocessing/passes/bv_gauss.cpp:574

[rainoftime]

Hi,
For this formula:

(set-logic UFBV)
(set-option :bv-gauss-elim true)
(assert (= (_ bv0 10) (_ bv0 10) (bvurem (bvadd #b1010010000 #b1010010000) (_ bv0 10)) (_ bv0 10) #b1010010000))
(check-sat)

CVC4 throws out a fatal failure:

Fatal failure within static CVC4::preprocessing::passes::BVGauss::Result CVC4::preprocessing::passes::BVGauss::gaussElimRewriteForUrem(const std::vector<CVC4::NodeTemplate<true> >&, std::unordered_map<CVC4::NodeTemplate<true>, CVC4::NodeTemplate<true>, CVC4::NodeHashFunction>&) at /home/peisen/test/tofuzz/CVC4/src/preprocessing/passes/bv_gauss.cpp:574
Check failure

 nvars

OS: Ubuntu 16.04
Commit: 7d3df3b