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fix out-of-scope variable bug in theory_str::process_concat_eq_type6

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this fix will have to be made to all functions that use varForBreakConcat
This commit is contained in:
Murphy Berzish 2016-07-23 16:02:11 -04:00
parent 0f38203779
commit ac16aa7c81
1 changed files with 41 additions and 6 deletions
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47
src/smt/theory_str.cpp
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@ -3363,18 +3363,53 @@ void theory_str::process_concat_eq_type6(expr * concatAst1, expr * concatAst2) {
expr * xorFlag = NULL;
std::pair<expr*, expr*> key1(concatAst1, concatAst2);
std::pair<expr*, expr*> key2(concatAst2, concatAst1);
if (varForBreakConcat.find(key1) == varForBreakConcat.end() && varForBreakConcat.find(key2) == varForBreakConcat.end()) {
// check the entries in this map to make sure they're still in scope
// before we use them.
// TODO something very similar might have to be done elsewhere when we use this map, if this works.
std::map<std::pair<expr*,expr*>, std::map<int, expr*> >::iterator entry1 = varForBreakConcat.find(key1);
std::map<std::pair<expr*,expr*>, std::map<int, expr*> >::iterator entry2 = varForBreakConcat.find(key2);
bool entry1InScope;
if (entry1 == varForBreakConcat.end()) {
entry1InScope = false;
} else {
if (internal_variable_set.find((entry1->second)[0]) == internal_variable_set.end()
|| internal_variable_set.find((entry1->second)[1]) == internal_variable_set.end()) {
entry1InScope = false;
} else {
entry1InScope = true;
}
}
bool entry2InScope;
if (entry2 == varForBreakConcat.end()) {
entry2InScope = false;
} else {
if (internal_variable_set.find((entry2->second)[0]) == internal_variable_set.end()
|| internal_variable_set.find((entry2->second)[1]) == internal_variable_set.end()) {
entry2InScope = false;
} else {
entry2InScope = true;
}
}
TRACE("t_str_detail", tout << "entry 1 " << (entry1InScope ? "in scope" : "not in scope") << std::endl
<< "entry 2 " << (entry2InScope ? "in scope" : "not in scope") << std::endl;);
if (!entry1InScope && !entry2InScope) {
commonVar = mk_nonempty_str_var();
xorFlag = mk_internal_xor_var();
varForBreakConcat[key1][0] = commonVar;
varForBreakConcat[key1][1] = xorFlag;
} else {
if (varForBreakConcat.find(key1) != varForBreakConcat.end()) {
commonVar = varForBreakConcat[key1][0];
xorFlag = varForBreakConcat[key1][1];
if (entry1InScope) {
commonVar = (entry1->second)[0];
xorFlag = (entry1->second)[1];
} else {
commonVar = varForBreakConcat[key2][0];
xorFlag = varForBreakConcat[key2][1];
commonVar = (entry2->second)[0];
xorFlag = (entry2->second)[1];
}
}