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fix for github issue 54

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This commit is contained in:
Ken McMillan 2015-05-19 18:47:13 -07:00
parent 69a3590490
commit ccc1f02216
3 changed files with 25 additions and 3 deletions
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6
src/interp/iz3mgr.h
View file

@ -279,6 +279,12 @@ class iz3mgr {
res[i] = arg(t,i);
}
std::vector<ast> args(const ast &t){
std::vector<ast> res;
get_args(t,res);
return res;
}
symb sym(ast t){
raw_ast *_ast = t.raw();
return is_app(_ast) ? to_app(_ast)->get_decl() : 0;

8
src/interp/iz3proof_itp.cpp
View file

@ -2215,8 +2215,12 @@ class iz3proof_itp_impl : public iz3proof_itp {
}
else {
if(get_term_type(p) == LitA){
if(get_term_type(q) == LitA)
itp = mk_false();
if(get_term_type(q) == LitA){
if(op(q) == Or)
itp = make_assumption(rng.hi,args(q));
else
itp = mk_false();
}
else {
if(get_term_type(p_eq_q) == LitA)
itp = q;

14
src/interp/iz3translate.cpp
View file

@ -1702,14 +1702,16 @@ public:
return res;
}
}
if(dk == PR_MODUS_PONENS && expect_clause && op(con) == Or){
if(dk == PR_MODUS_PONENS && expect_clause && op(con) == Or && op(conc(prem(proof,0))) == Or){
Iproof::node clause = translate_main(prem(proof,0),true);
res = RewriteClause(clause,prem(proof,1));
return res;
}
#if 0
if(dk == PR_MODUS_PONENS && expect_clause && op(con) == Or)
std::cout << "foo!\n";
#endif
// no idea why this shows up
if(dk == PR_MODUS_PONENS_OEQ){
@ -1965,6 +1967,16 @@ public:
res = make(commute,pf,comm_equiv);
break;
}
case PR_AND_ELIM: {
std::vector<ast> rule_ax, res_conc;
ast piv = conc(prem(proof,0));
rule_ax.push_back(make(Not,piv));
rule_ax.push_back(con);
ast pf = iproof->make_axiom(rule_ax);
res_conc.push_back(con);
res = iproof->make_resolution(piv,res_conc,pf,args[0]);
break;
}
default:
pfgoto(proof);
assert(0 && "translate_main: unsupported proof rule");