working on smt2 and api

src/api/z3_api.h

@@ -249,6 +249,8 @@ typedef enum
    - Z3_OP_OEQ Binary equivalence modulo namings. This binary predicate is used in proof terms.
         It captures equisatisfiability and equivalence modulo renamings.
 
+   - Z3_OP_INTERP Marks a sub-formula for interpolation.
+
    - Z3_OP_ANUM Arithmetic numeral.
 
    - Z3_OP_AGNUM Arithmetic algebraic numeral. Algebraic numbers are used to represent irrational numbers in Z3.
@@ -890,6 +892,7 @@ typedef enum {
     Z3_OP_NOT,
     Z3_OP_IMPLIES,
     Z3_OP_OEQ,
+    Z3_OP_INTERP,
 
     // Arithmetic
     Z3_OP_ANUM = 0x200,
@@ -2102,6 +2105,16 @@ END_MLAPI_EXCLUDE
     */
     Z3_ast Z3_API Z3_mk_not(__in Z3_context c, __in Z3_ast a);
     
+    /**
+        \brief \mlh mk_interp c a \endmlh 
+        Create an AST node marking a formula position for interpolation.
+        
+        The node \c a must have Boolean sort.
+
+        def_API('Z3_mk_interp', AST, (_in(CONTEXT), _in(AST)))
+    */
+    Z3_ast Z3_API Z3_mk_interp(__in Z3_context c, __in Z3_ast a);
+    
     /**
        \brief \mlh mk_ite c t1 t2 t2 \endmlh 
        Create an AST node representing an if-then-else: <tt>ite(t1, t2,
@@ -7807,6 +7820,7 @@ END_MLAPI_EXCLUDE
      valuation of the vertices that makes all the implications true
      where each value is represented using the common symbols between
      the formulas in the subtree and the remainder of the formulas.
+
   */
   
 
@@ -7822,6 +7836,51 @@ END_MLAPI_EXCLUDE
 
 
 
+  /** Check the correctness of an interpolant. The Z3 context must
+      have no constraints asserted when this call is made. That means
+      that after interpolating, you must first fully pop the Z3
+      context before calling this. See Z3_interpolate for meaning of parameters.
+
+      \param ctx The Z3 context. Must be generated by Z3_mk_interpolation_context
+      \param num The number of constraints in the sequence
+      \param cnsts Array of constraints (AST's in context ctx)
+      \param parents The parents vector (or NULL for sequence)
+      \param interps The interpolant to check
+      \param error Returns an error message if interpolant incorrect (do not free the string)
+
+      Return value is Z3_L_TRUE if interpolant is verified, Z3_L_FALSE if
+      incorrect, and Z3_L_UNDEF if unknown.
+
+  */
+  
+  int Z3_API
+  Z3_check_interpolant(Z3_context ctx, int num, Z3_ast *cnsts, int *parents, Z3_ast *interps, const char **error,
+                                       int num_theory, Z3_ast *theory);
+
+  /** Write an interpolation problem to file suitable for reading with
+      Z3_read_interpolation_problem. The output file is a sequence
+      of SMT-LIB2 format commands, suitable for reading with command-line Z3
+      or other interpolating solvers.
+
+      \param ctx The Z3 context. Must be generated by z3_mk_interpolation_context
+      \param num The number of constraints in the sequence
+      \param cnsts Array of constraints
+      \param parents The parents vector (or NULL for sequence)
+      \param filename The file name to write
+
+  */
+
+  void Z3_API
+  Z3_write_interpolation_problem(Z3_context ctx,
+				 int num, 
+				 Z3_ast *cnsts, 
+				 int *parents,
+				 const char *filename,
+                                 int num_theory,
+				 Z3_ast *theory);
+
+
+
 #endif