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author | Morgan Deters <mdeters@gmail.com> | 2011-09-30 23:01:58 +0000 |
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committer | Morgan Deters <mdeters@gmail.com> | 2011-09-30 23:01:58 +0000 |
commit | 33e3657c15d6c760206aeaca10b5690af4a78223 (patch) | |
tree | a75475200584ab5e11981827182d979d84f6e1ff /examples/SimpleVC.java | |
parent | 192c5592424e5db0afc72e7316c4698949a2f7e5 (diff) |
interfaces fixes and cleanups...and examples of each interface!
Diffstat (limited to 'examples/SimpleVC.java')
-rw-r--r-- | examples/SimpleVC.java | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/examples/SimpleVC.java b/examples/SimpleVC.java new file mode 100644 index 000000000..e6a667e16 --- /dev/null +++ b/examples/SimpleVC.java @@ -0,0 +1,73 @@ +/********************* */ +/*! \file SimpleVC.java + ** \verbatim + ** Original author: mdeters + ** Major contributors: none + ** Minor contributors (to current version): none + ** This file is part of the CVC4 prototype. + ** Copyright (c) 2009, 2010, 2011 The Analysis of Computer Systems Group (ACSys) + ** Courant Institute of Mathematical Sciences + ** New York University + ** See the file COPYING in the top-level source directory for licensing + ** information.\endverbatim + ** + ** \brief A simple demonstration of the Java interface + ** + ** A simple demonstration of the Java interface. + ** + ** To run the resulting class file, you need to do something like the + ** following: + ** + ** java \ + ** -classpath path/to/cvc4.jar \ + ** -Djava.library.path=/dir/containing/libcvc4bindings_java.so \ + ** SimpleVC + ** + ** For example, if you are building CVC4 without specifying your own + ** build directory, the build process puts everything in builds/, and + ** you can run this example (after building it with "make") like this: + ** + ** java \ + ** -classpath builds/examples:builds/src/bindings/cvc4.jar \ + ** -Djava.library.path=builds/src/bindings/.libs \ + ** SimpleVC + **/ + +import edu.nyu.acsys.CVC4.*; +import edu.nyu.acsys.CVC4.Integer;// to override java.lang.Integer name lookup + +public class SimpleVC { + public static void main(String[] args) { + System.loadLibrary("cvc4bindings_java"); + + ExprManager em = new ExprManager(); + SmtEngine smt = new SmtEngine(em); + + // Prove that for integers x and y: + // x > 0 AND y > 0 => 2x + y >= 3 + + Type integer = em.integerType(); + + Expr x = em.mkVar("x", integer); + Expr y = em.mkVar("y", integer); + Expr zero = em.mkConst(new Integer(0)); + + Expr x_positive = em.mkExpr(Kind.GT, x, zero); + Expr y_positive = em.mkExpr(Kind.GT, y, zero); + + Expr two = em.mkConst(new Integer(2)); + Expr twox = em.mkExpr(Kind.MULT, two, x); + Expr twox_plus_y = em.mkExpr(Kind.PLUS, twox, y); + + Expr three = em.mkConst(new Integer(3)); + Expr twox_plus_y_geq_3 = em.mkExpr(Kind.GEQ, twox_plus_y, three); + + BoolExpr formula = + new BoolExpr(em.mkExpr(Kind.AND, x_positive, y_positive)). + impExpr(new BoolExpr(twox_plus_y_geq_3)); + + System.out.println("Checking validity of formula " + formula + " with CVC4."); + System.out.println("CVC4 should report VALID."); + System.out.println("Result from CVC4 is: " + smt.query(formula)); + } +} |