65 lines
2.4 KiB
C++
65 lines
2.4 KiB
C++
#include "../../src/cadical.hpp"
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#ifdef NDEBUG
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#undef NDEBUG
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#endif
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#include <cassert>
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// This is the example from the header file
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int main () {
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CaDiCaL::Solver * solver = new CaDiCaL::Solver;
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// ------------------------------------------------------------------
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// Encode Problem and check without assumptions.
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enum { TIE = 1, SHIRT = 2 };
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solver->add (-TIE), solver->add (SHIRT), solver->add (0);
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solver->add (TIE), solver->add (SHIRT), solver->add (0);
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solver->add (-TIE), solver->add (-SHIRT), solver->add (0);
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int res = solver->solve (); // Solve instance.
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assert (res == 10); // Check it is 'SATISFIABLE'.
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res = solver->val (TIE); // Obtain assignment of 'TIE'.
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assert (res < 0); // Check 'TIE' assigned to 'false'.
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res = solver->val (SHIRT); // Obtain assignment of 'SHIRT'.
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assert (res > 0); // Check 'SHIRT' assigned to 'true'.
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// ------------------------------------------------------------------
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// Incrementally solve again under one assumption.
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solver->assume (TIE); // Now force 'TIE' to true.
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res = solver->solve (); // Solve again incrementally.
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assert (res == 20); // Check it is 'UNSATISFIABLE'.
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res = solver->failed (TIE); // Check 'TIE' responsible.
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assert (res); // Yes, 'TIE' in core.
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res = solver->failed (SHIRT); // Check 'SHIRT' responsible.
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assert (!res); // No, 'SHIRT' not in core.
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// ------------------------------------------------------------------
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// Incrementally solve once more under another assumption.
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solver->assume (-SHIRT); // Now force 'SHIRT' to false.
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res = solver->solve (); // Solve again incrementally.
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assert (res == 20); // Check it is 'UNSATISFIABLE'.
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res = solver->failed (TIE); // Check 'TIE' responsible.
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assert (!res); // No, 'TIE' not in core.
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res = solver->failed (-SHIRT); // Check '!SHIRT' responsible.
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assert (res); // Yes, '!SHIRT' in core.
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// ------------------------------------------------------------------
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delete solver;
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return 0;
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}
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