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fix #1729

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2018-07-05 07:17:08 -07:00
parent adb9a1c797
commit f96133f4d9
4 changed files with 33 additions and 7 deletions
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4
src/api/api_goal.cpp
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@ -199,8 +199,8 @@ extern "C" {
RESET_ERROR_CODE();
std::ostringstream buffer;
if (!to_goal_ref(g)->is_cnf()) {
warning_msg("goal is not in CNF. This will produce a propositional abstraction. "
"If this is not what you want, then preprocess by optional bit-blasting and applying tseitin-cnf");
SET_ERROR_CODE(Z3_INVALID_ARG, "If this is not what you want, then preprocess by optional bit-blasting and applying tseitin-cnf");
RETURN_Z3(nullptr);
}
to_goal_ref(g)->display_dimacs(buffer);
// Hack for removing the trailing '\n'

5
src/api/z3_api.h
View file

@ -5525,6 +5525,11 @@ extern "C" {
/**
\brief Convert a goal into a DIMACS formatted string.
The goal must be in CNF. You can convert a goal to CNF
by applying the tseitin-cnf tactic. Bit-vectors are not automatically
converted to Booleans either, so the caller intends to
preserve satisfiability, it should apply bit-blasting tactics.
Quantifiers and theory atoms will not be encoded.
def_API('Z3_goal_to_dimacs_string', STRING, (_in(CONTEXT), _in(GOAL)))
*/