54 lines
1.3 KiB
Diff
54 lines
1.3 KiB
Diff
--- src/prop/cryptominisat.cpp.orig 2019-04-09 10:14:31.000000000 -0600
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+++ src/prop/cryptominisat.cpp 2020-04-26 14:04:26.086833393 -0600
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@@ -68,15 +68,8 @@ CryptoMinisatSolver::CryptoMinisatSolver
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d_okay(true),
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d_statistics(registry, name)
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{
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- d_true = newVar();
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- d_false = newVar();
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-
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- std::vector<CMSat::Lit> clause(1);
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- clause[0] = CMSat::Lit(d_true, false);
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- d_solver->add_clause(clause);
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-
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- clause[0] = CMSat::Lit(d_false, true);
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- d_solver->add_clause(clause);
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+ d_true = undefSatVariable;
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+ d_false = undefSatVariable;
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}
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@@ -154,10 +147,32 @@ SatVariable CryptoMinisatSolver::newVar
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}
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SatVariable CryptoMinisatSolver::trueVar() {
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+ if (d_true == undefSatVariable) {
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+ d_true = newVar();
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+ d_false = newVar();
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+
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+ std::vector<CMSat::Lit> clause(1);
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+ clause[0] = CMSat::Lit(d_true, false);
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+ d_solver->add_clause(clause);
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+
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+ clause[0] = CMSat::Lit(d_false, true);
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+ d_solver->add_clause(clause);
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+ }
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return d_true;
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}
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SatVariable CryptoMinisatSolver::falseVar() {
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+ if (d_true == undefSatVariable) {
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+ d_true = newVar();
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+ d_false = newVar();
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+
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+ std::vector<CMSat::Lit> clause(1);
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+ clause[0] = CMSat::Lit(d_true, false);
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+ d_solver->add_clause(clause);
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+
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+ clause[0] = CMSat::Lit(d_false, true);
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+ d_solver->add_clause(clause);
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+ }
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return d_false;
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}
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