(** Why3 driver for CVC4 1.4 *)

prelude ";; produced by cvc4_14.drv ;;"
prelude "(set-info :smt-lib-version 2.5)"
prelude "(set-logic AUFBVDTNIRA)"
(*
    A    : Array
    UF   : Uninterpreted Function
    BV   : BitVectors
    DT   : Datatypes
    NIRA : NonLinear Integer+Real Arithmetic
*)
prelude "(set-info :source |VC generated by SPARK 2014|)"
prelude "(set-info :category industrial)"
prelude "(set-info :status unknown)"

import "smt-libv2.gen"
printer "smtv2"
import "smt-libv2-bv.gen"
import "cvc4_bv.gen"
import "discrimination.gen"

(* Performed introductions depending on whether counterexamples are
   requested, as said by the meta "get_counterexmp". When this meta
   set, this transformation introduces the model variables that are
   still embedded in the goal. When it is not set, it removes all
   these unused-ce-related variables, even in the context.  *)
transformation "counterexamples_dependent_intros"

transformation "inline_trivial"
transformation "eliminate_builtin"
transformation "detect_polymorphism"
transformation "eliminate_definition"
(* We could keep more definitions by using
   transformation "eliminate_definition_conditionally"
   instead, but some proofs are lost
   (examples/logic/triangle_inequality.why)
*)
transformation "eliminate_inductive"
transformation "eliminate_epsilon"
transformation "eliminate_algebraic_if_poly"
transformation "eliminate_literal"

transformation "simplify_formula"
(*transformation "simplify_trivial_quantification"*)

transformation "discriminate_if_poly"
transformation "encoding_smt_if_poly"

(* remove pointless quantifiers from the goal *)
transformation "introduce_premises"

(** Error messages specific to CVC4 *)

outofmemory "(error \".*out of memory\")"
outofmemory "CVC4 suffered a segfault"
outofmemory "CVC4::BVMinisat::OutOfMemoryException"
outofmemory "std::bad_alloc"
outofmemory "Cannot allocate memory"
timeout "interrupted by timeout"
steps "smt::SmtEngine::resourceUnitsUsed, \\([0-9]+.?[0-9]*\\)" 1
(**
Unfortunately, there is no specific output message when CVC4 (<1.6) reaches its resource limit
steplimitexceeded "??"
*)

(** Extra theories supported by CVC4 *)

(* Disabled:
   CVC4 seems less efficient with its built-in implementation than
   with the axiomatic version
*)
(*
theory int.EuclideanDivision
  syntax function div "(div %1 %2)"
  syntax function mod "(mod %1 %2)"
  remove prop Mod_bound
  remove prop Div_mod
  remove prop Mod_1
  remove prop Div_1
end
*)
