C# (CSharp) Z3_context Examples

Programming Language: C# (CSharp)

Class/Type: Z3_context

Examples at hotexamples.com: 33

Z3_context is a library package in C# that allows developers to build and execute programs that perform automated reasoning and constraint solving.

Here are some code examples of how Z3_context can be used:

Example 1: Solving an equation

using Microsoft.Z3;

Z3_context context = new Z3_context();

Expr x = context.MkIntConst("x");
Expr y = context.MkIntConst("y");

// Define the equation
Expr eq = context.MkAdd(x, y) == context.MkInt(10);

// Solve the equation
Solver s = context.MkSolver();
s.Assert(eq);

if (s.Check() == Status.SATISFIABLE)
{
    Console.WriteLine("Solution found: x = " + s.Model.Eval(x) + ", y = " + s.Model.Eval(y));
}
else
{
    Console.WriteLine("No solution found.");
}

This code creates a Z3_context instance and defines an equation that needs to be solved. The equation is then passed to a Solver instance and the solver checks if the equation has a valid solution. If a solution is found, it is displayed in the console.

Example 2: Finding prime numbers

using Microsoft.Z3;

Z3_context context = new Z3_context();

FuncDecl isPrime = context.MkFuncDecl("isPrime", context.IntSort(), context.BoolSort());

IntExpr n = context.MkIntConst("n");
IntExpr i = context.MkIntConst("i");

// Define the predicate for prime numbers
Expr primePredicate = context.MkForall(new Expr[] { n },
    context.MkImplies(context.MkAnd(context.MkLe(context.MkInt(2), n), context.MkLt(n, context.MkInt(100))),
        context.MkEq(isPrime.Apply(n), context.MkNot(context.MkExists(new Expr[] { i },
            context.MkAnd(context.MkLe(context.MkInt(2), i), context.MkLt(i, n),
                context.MkEq(context.MkRem(n, i), context.MkInt(0))))))),
    1, null, null, null, null);

Solver s = context.MkSolver();
s.Assert(primePredicate);

// Check if there are any prime numbers between 50 and 100
for (int j = 50; j <= 100; j++)
{
    Expr expr = isPrime.Apply(context.MkInt(j));

    if (s.Check(expr) == Status.SATISFIABLE && s.Model.Eval(expr).BoolValue)
    {
        Console.WriteLine(j + " is prime.");
    }
    else
    {
        Console.WriteLine(j + " is not prime.");
    }
}

This code creates a Z3_context instance and defines a predicate for prime numbers. The predicate is then passed to a Solver instance and the solver checks if there are any prime numbers between 50 and 100. If a number is prime, it is displayed in the console. Z3_context is a part of the Z3 library package and can be found in the Microsoft.Z3 namespace.

C# (CSharp) Z3_context - 33 examples found. These are the top rated real world C# (CSharp) examples of Z3_context extracted from open source projects. You can rate examples to help us improve the quality of examples.

Example #1

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File: NativeFuncInterp.cs Project: rainoftime/z3

        internal NativeFuncInterp(NativeContext ctx, NativeModel mdl, Z3_func_decl decl, Z3_func_interp fi)
        {
            Debug.Assert(ctx != null);
            Z3_context nCtx = ctx.nCtx;

            Native.Z3_func_interp_inc_ref(nCtx, fi);

            Declaration = decl;
            Else        = Native.Z3_func_interp_get_else(nCtx, fi);
            uint numEntries = Native.Z3_func_interp_get_num_entries(nCtx, fi);
            uint numArgs    = Native.Z3_func_interp_get_arity(nCtx, fi);

            Entries = new Entry[numEntries];

            for (uint j = 0; j < numEntries; ++j)
            {
                var entry = Native.Z3_func_interp_get_entry(nCtx, fi, j);
                Native.Z3_func_entry_inc_ref(nCtx, entry);
                Entries[j].Arguments = new Z3_ast[numArgs];
                for (uint i = 0; i < numArgs; ++i)
                {
                    Entries[j].Arguments[i] = Native.Z3_func_entry_get_arg(nCtx, entry, i);
                }
                Entries[j].Result = Native.Z3_func_entry_get_value(nCtx, entry);
                Native.Z3_func_entry_dec_ref(nCtx, entry);
            }

            Native.Z3_func_interp_dec_ref(nCtx, fi);
        }

Example #2

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        internal static Entry[] NativeEntries(Z3_context ctx, Z3_stats stats)
        {
            uint n = Native.Z3_stats_size(ctx, stats);

            Entry[] res = new Entry[n];
            for (uint i = 0; i < n; i++)
            {
                Entry  e;
                string k = Native.Z3_stats_get_key(ctx, stats, i);
                if (Native.Z3_stats_is_uint(ctx, stats, i) != 0)
                {
                    e = new Entry(k, Native.Z3_stats_get_uint_value(ctx, stats, i));
                }
                else if (Native.Z3_stats_is_double(ctx, stats, i) != 0)
                {
                    e = new Entry(k, Native.Z3_stats_get_double_value(ctx, stats, i));
                }
                else
                {
                    throw new Z3Exception("Unknown data entry value");
                }
                res[i] = e;
            }
            return(res);
        }

Example #3

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        static voidp _fresh(voidp _ctx, Z3_context new_context)
        {
            var prop  = (UserPropagator)GCHandle.FromIntPtr(_ctx).Target;
            var ctx   = new Context(new_context);
            var prop1 = prop.Fresh(prop.ctx);

            return(GCHandle.ToIntPtr(prop1.gch));
        }

Example #4

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