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added sequences to get-interpolant and compute-interpolant

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This commit is contained in:
Ken McMillan 2013-04-09 15:52:30 -07:00
parent bbe036bc03
commit e651f45bc0
5 changed files with 253 additions and 38 deletions
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62
src/interp/iz3interp.cpp
View file

@ -278,6 +278,37 @@ public:
interps[i] = i < _interps.size() ? _interps[i] : mk_false();
}
bool has_interp(hash_map<ast,bool> &memo, const ast &t){
if(memo.find(t) != memo.end())
return memo[t];
bool res = false;
if(op(t) == Interp)
res = true;
else if(op(t) == And){
int nargs = num_args(t);
for(int i = 0; i < nargs; i++)
res |= has_interp(memo, arg(t,i));
}
memo[t] = res;
return res;
}
void collect_conjuncts(std::vector<ast> &cnsts, hash_map<ast,bool> &memo, const ast &t){
if(!has_interp(memo,t))
cnsts.push_back(t);
else {
int nargs = num_args(t);
for(int i = 0; i < nargs; i++)
collect_conjuncts(cnsts, memo, arg(t,i));
}
}
void assert_conjuncts(solver &s, std::vector<ast> &cnsts, const ast &t){
hash_map<ast,bool> memo;
collect_conjuncts(cnsts,memo,t);
for(unsigned i = 0; i < cnsts.size(); i++)
s.assert_expr(to_expr(cnsts[i].raw()));
}
iz3interp(ast_manager &_m_manager)
: iz3base(_m_manager) {}
@ -329,6 +360,37 @@ void iz3interpolate(ast_manager &_m_manager,
interps[i] = itp.uncook(_interps[i]);
}
lbool iz3interpolate(ast_manager &_m_manager,
solver &s,
ast *tree,
ptr_vector<ast> &cnsts,
ptr_vector<ast> &interps,
model_ref &m,
interpolation_options_struct * options)
{
iz3interp itp(_m_manager);
iz3mgr::ast _tree = itp.cook(tree);
std::vector<iz3mgr::ast> _cnsts;
itp.assert_conjuncts(s,_cnsts,_tree);
lbool res = s.check_sat(0,0);
if(res == l_false){
ast *proof = s.get_proof();
iz3mgr::ast _proof = itp.cook(proof);
std::vector<iz3mgr::ast> _interps;
itp.proof_to_interpolant(_proof,_cnsts,_tree,_interps,options);
interps.resize(_interps.size());
for(unsigned i = 0; i < interps.size(); i++)
interps[i] = itp.uncook(_interps[i]);
}
else if(m){
s.get_model(m);
}
cnsts.resize(_cnsts.size());
for(unsigned i = 0; i < cnsts.size(); i++)
cnsts[i] = itp.uncook(_cnsts[i]);
return res;
}

21
src/interp/iz3interp.h
View file

@ -21,6 +21,7 @@ Revision History:
#define IZ3_INTERP_H
#include "iz3hash.h"
#include "solver.h"
struct interpolation_options_struct {
stl_ext::hash_map<std::string,std::string> map;
@ -37,6 +38,9 @@ struct iz3_incompleteness {
typedef interpolation_options_struct *interpolation_options;
/* Compute an interpolant from a proof. This version uses the parents vector
representation, for compatibility with the old API. */
void iz3interpolate(ast_manager &_m_manager,
ast *proof,
const ptr_vector<ast> &cnsts,
@ -45,6 +49,9 @@ void iz3interpolate(ast_manager &_m_manager,
const ptr_vector<ast> &theory,
interpolation_options_struct * options = 0);
/* Compute an interpolant from a proof. This version uses the ast
representation, for compatibility with the new API. */
void iz3interpolate(ast_manager &_m_manager,
ast *proof,
const ptr_vector<ast> &cnsts,
@ -52,4 +59,18 @@ void iz3interpolate(ast_manager &_m_manager,
ptr_vector<ast> &interps,
interpolation_options_struct * options);
/* Compute an interpolant from an ast representing an interpolation
problem, if unsat, else return a model (if enabled). Uses the
given solver to produce the proof/model. Also returns a vector
of the constraints in the problem, helpful for checking correctness.
*/
lbool iz3interpolate(ast_manager &_m_manager,
solver &s,
ast *tree,
ptr_vector<ast> &cnsts,
ptr_vector<ast> &interps,
model_ref &m,
interpolation_options_struct * options);
#endif