ground sat refutation from spacer (wip)

src/muz/spacer/spacer_sat_answer.h

@@ -0,0 +1,55 @@
+/*++
+Copyright (c) 2018 Arie Gurfinkel
+
+Module Name:
+
+    spacer_sat_answer.h
+
+Abstract:
+
+  Compute refutation proof for CHC
+
+Author:
+
+    Arie Gurfinkel
+
+Revision History:
+
+--*/
+
+#ifndef _SPACER_SAT_ANSWER_H_
+#define _SPACER_SAT_ANSWER_H_
+
+#include "muz/spacer/spacer_context.h"
+#include "ast/ast.h"
+#include "util/obj_hashtable.h"
+#include "model/model.h"
+#include "solver/solver.h"
+
+namespace spacer {
+
+class ground_sat_answer_op {
+    context &m_ctx;
+    ast_manager &m;
+    manager &m_pm;
+
+    expr_ref_vector m_pinned;
+    obj_map<expr, proof*> m_cache;
+
+    ref<solver> m_solver;
+
+    struct frame;
+
+    proof *mk_proof_step(frame &fr);
+    void mk_children(frame &fr, vector<frame> &todo);
+    void mk_child_subst_from_model(func_decl *pred, unsigned i,
+                                   model_ref &mdl, expr_ref_vector &subst);
+
+public:
+    ground_sat_answer_op(context &ctx);
+
+    proof_ref operator() (pred_transformer &query);
+};
+}
+
+#endif