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tune generation of drat files, add helpful binary clause in lookahead simplification

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2019-02-01 13:35:54 -08:00
parent 7fa9768c36
commit e07f0c0284
2 changed files with 49 additions and 21 deletions
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44
src/sat/sat_drat.cpp
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@ -76,24 +76,54 @@ namespace sat {
return;
}
#if 0
if (st == status::deleted) (*m_out) << "d ";
for (unsigned i = 0; i < n; ++i) (*m_out) << c[i] << " ";
(*m_out) << "0\n";
return;
#endif
char buffer[10000];
char digits[20]; // enough for storing unsigned
char* lastd = digits + sizeof(digits);
int len = 0;
if (st == status::deleted) {
buffer[0] = 'd';
buffer[1] = ' ';
len = 2;
}
for (unsigned i = 0; i < n && len >= 0; ++i) {
for (unsigned i = 0; i < n && len < sizeof(buffer); ++i) {
literal lit = c[i];
int _lit = lit.var();
if (lit.sign()) _lit = -_lit;
len += snprintf(buffer + len, sizeof(buffer) - len, "%d ", _lit);
unsigned v = lit.var();
if (lit.sign()) buffer[len++] = '-';
char* d = lastd;
while (v > 0) {
d--;
*d = (v % 10) + '0';
v /= 10;
SASSERT(d > digits);
}
if (len + lastd - d < sizeof(buffer)) {
memcpy(buffer + len, d, lastd - d);
len += static_cast<unsigned>(lastd - d);
}
else {
len = sizeof(buffer) + 1;
}
if (len < sizeof(buffer)) {
buffer[len++] = ' ';
}
}
if (len >= 0) {
len += snprintf(buffer + len, sizeof(buffer) - len, "0\n");
if (len < sizeof(buffer) + 2) {
buffer[len++] = '0';
buffer[len++] = '\n';
}
if (len >= 0) {
else {
len = sizeof(buffer) + 1;
}
if (len <= sizeof(buffer)) {
m_out->write(buffer, len);
}
else {