diff options
Diffstat (limited to 'Source/Provers/SMTLib/SMTLibLineariser.cs')
| -rw-r--r-- | Source/Provers/SMTLib/SMTLibLineariser.cs | 31 |
1 files changed, 28 insertions, 3 deletions
diff --git a/Source/Provers/SMTLib/SMTLibLineariser.cs b/Source/Provers/SMTLib/SMTLibLineariser.cs index dcf95bd2..06aa5bbe 100644 --- a/Source/Provers/SMTLib/SMTLibLineariser.cs +++ b/Source/Provers/SMTLib/SMTLibLineariser.cs @@ -34,14 +34,14 @@ namespace Microsoft.Boogie.SMTLib public class SMTLibExprLineariser : IVCExprVisitor<bool, LineariserOptions/*!*/> { - public static string ToString(VCExpr e, UniqueNamer namer, SMTLibProverOptions opts) + public static string ToString(VCExpr e, UniqueNamer namer, SMTLibProverOptions opts, ISet<VCExprVar> namedAssumes = null, IList<string> optReqs = null, ISet<VCExprVar> tryAssumes = null) { Contract.Requires(e != null); Contract.Requires(namer != null); Contract.Ensures(Contract.Result<string>() != null); StringWriter sw = new StringWriter(); - SMTLibExprLineariser lin = new SMTLibExprLineariser(sw, namer, opts); + SMTLibExprLineariser lin = new SMTLibExprLineariser(sw, namer, opts, namedAssumes, optReqs); Contract.Assert(lin != null); lin.Linearise(e, LineariserOptions.Default); return cce.NonNull(sw.ToString()); @@ -74,12 +74,17 @@ namespace Microsoft.Boogie.SMTLib internal int UnderQuantifier = 0; internal readonly SMTLibProverOptions ProverOptions; - public SMTLibExprLineariser(TextWriter wr, UniqueNamer namer, SMTLibProverOptions opts) + readonly IList<string> OptimizationRequests; + readonly ISet<VCExprVar> NamedAssumes; + + public SMTLibExprLineariser(TextWriter wr, UniqueNamer namer, SMTLibProverOptions opts, ISet<VCExprVar> namedAssumes = null, IList<string> optReqs = null) { Contract.Requires(wr != null); Contract.Requires(namer != null); this.wr = wr; this.Namer = namer; this.ProverOptions = opts; + this.OptimizationRequests = optReqs; + this.NamedAssumes = namedAssumes; } public void Linearise(VCExpr expr, LineariserOptions options) @@ -263,6 +268,26 @@ namespace Microsoft.Boogie.SMTLib } return true; } + if (OptimizationRequests != null + && (node.Op.Equals(VCExpressionGenerator.MinimizeOp) || node.Op.Equals(VCExpressionGenerator.MaximizeOp))) + { + string optOp = node.Op.Equals(VCExpressionGenerator.MinimizeOp) ? "minimize" : "maximize"; + OptimizationRequests.Add(string.Format("({0} {1})", optOp, ToString(node[0], Namer, ProverOptions, NamedAssumes))); + Linearise(node[1], options); + return true; + } + if (node.Op is VCExprSoftOp) + { + Linearise(node[1], options); + return true; + } + if (node.Op.Equals(VCExpressionGenerator.NamedAssumeOp)) + { + var exprVar = node[0] as VCExprVar; + NamedAssumes.Add(exprVar); + Linearise(node[1], options); + return true; + } return node.Accept<bool, LineariserOptions/*!*/>(OpLineariser, options); } |