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#include "../../src/cadical.hpp"
#ifdef NDEBUG
#undef NDEBUG
#endif
#include <cassert>
#include <cstdlib>
#include <iostream>
#include <string>
using namespace std;
using namespace CaDiCaL;
static string path (const char *suffix) {
const char *prefix = getenv ("CADICALBUILD");
string res = prefix ? prefix : ".";
res += "/test-api-traverse.";
res += suffix;
return res;
}
struct WitnessChecker : WitnessIterator {
bool match (int a, int b) {
if (a == -3 && b == 1)
return true;
if (a == 1 && b == -3)
return true;
if (a == -3 && b == 2)
return true;
if (a == 2 && b == -3)
return true;
return false;
}
bool match (int a, int b, int c) {
if (a == 3 && b == -1 && c == -2)
return true;
if (a == 3 && b == -2 && c == -1)
return true;
if (a == -1 && b == 3 && c == -2)
return true;
if (a == -2 && b == 3 && c == -1)
return true;
if (a == -1 && b == -2 && c == 3)
return true;
if (a == -2 && b == -1 && c == 3)
return true;
return false;
}
public:
bool witness (const vector<int> &c, const vector<int> &w, uint64_t) {
for (const auto &lit : w)
cout << lit << ' ';
cout << "0 ";
for (const auto &lit : c)
cout << lit << ' ';
cout << '0' << endl;
if (c.size () == 1) {
assert (c[0] == 5);
assert (w.size () == 1);
assert (w[0] == 5);
} else {
assert (w.size () == 1);
assert (w[0] != -3);
assert (w[0] != 3);
assert (abs (w[0]) == 1 || abs (w[0]) == 2);
if (c.size () == 2)
assert (match (c[0], c[1]));
else
assert (c.size () == 3), assert (match (c[0], c[1], c[2]));
}
return true;
}
};
struct ClauseChecker : ClauseIterator {
bool clause (const vector<int> &c) {
for (const auto &lit : c)
cout << lit << ' ';
cout << '0' << endl;
assert (c.size () == 1);
assert (c[0] == 4);
return true;
}
};
int main () {
Solver cadical;
// And gate 3 = 1 & 2>
cadical.add (-3);
cadical.add (1);
cadical.add (0);
cadical.add (-3);
cadical.add (2);
cadical.add (0);
cadical.add (3);
cadical.add (-1);
cadical.add (-2);
cadical.add (0);
// Force 4 to true.
cadical.add (4);
cadical.add (1);
cadical.add (2);
cadical.add (0);
cadical.add (4);
cadical.add (-1);
cadical.add (2);
cadical.add (0);
cadical.add (4);
cadical.add (1);
cadical.add (-2);
cadical.add (0);
cadical.add (4);
cadical.add (-1);
cadical.add (-2);
cadical.add (0);
// Force 5 to true too.
cadical.add (5);
cadical.add (1);
cadical.add (0);
cadical.add (5);
cadical.add (-1);
cadical.add (0);
cadical.freeze (3);
cadical.freeze (4);
cadical.simplify (1);
// Now we expect '5' to be part of the witness, but '3' and '4' to be part
// the traversed clauses and check this too. See the long comment on
// 'frozen' versus 'non-frozen' unit traversal in 'external.cpp'.
cadical.write_dimacs (path ("clauses").c_str (), 5);
cadical.write_extension (path ("extensions").c_str ());
cout << "clauses" << endl;
ClauseChecker clause_checker;
cadical.traverse_clauses (clause_checker);
cout << "witnesses" << endl;
WitnessChecker witness_checker;
cadical.traverse_witnesses_backward (witness_checker);
return 0;
}
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