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add verbose output to capture cases for empty cube

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2018-09-25 23:54:48 -07:00
parent af41255a9d
commit 26d40865fa
1 changed files with 6 additions and 1 deletions
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7
src/sat/sat_solver/inc_sat_solver.cpp
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@ -311,7 +311,10 @@ public:
expr_ref_vector cube(expr_ref_vector& vs, unsigned backtrack_level) override {
if (!is_internalized()) {
lbool r = internalize_formulas();
if (r != l_true) return expr_ref_vector(m);
if (r != l_true) {
IF_VERBOSE(0, verbose_stream() << "internalize produced " << r << "\n");
return expr_ref_vector(m);
}
}
convert_internalized();
obj_hashtable<expr> _vs;
@ -329,6 +332,7 @@ public:
return result;
}
if (result == l_true) {
IF_VERBOSE(1, verbose_stream() << "formulas are SAT\n");
return expr_ref_vector(m);
}
expr_ref_vector fmls(m);
@ -345,6 +349,7 @@ public:
vs.push_back(x);
}
}
if (fmls.empty()) { IF_VERBOSE(0, verbose_stream() << "no literals were produced in cube\n"); }
return fmls;
}