diff options
| -rw-r--r-- | src/theory/arith/nl_model.cpp | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/src/theory/arith/nl_model.cpp b/src/theory/arith/nl_model.cpp index 54ae4c52a..8a4145552 100644 --- a/src/theory/arith/nl_model.cpp +++ b/src/theory/arith/nl_model.cpp @@ -534,8 +534,11 @@ bool NlModel::solveEqualitySimple(Node eq, if (ArithMSum::isolate(uv, msum, veqc, slv, EQUAL) != 0) { Assert(!slv.isNull()); - // currently do not support substitution-with-coefficients - if (veqc.isNull() && !expr::hasSubterm(slv, uv)) + // Currently do not support substitution-with-coefficients. + // We also ensure types are correct here, which avoids substituting + // a term of non-integer type for a variable of integer type. + if (veqc.isNull() && !expr::hasSubterm(slv, uv) + && slv.getType().isSubtypeOf(uv.getType())) { Trace("nl-ext-cm") << "check-model-subs : " << uv << " -> " << slv << std::endl; |