In reply to hisingh:
Add clocking event in the $stable
reject_on( ! $stable( Sig1, @(posedge clk) ) ) $stable( Sig1 ) s_until_with $rose( Sig2 ) ;
The reject_on (expression_or_dist) property_expr rejects the property as false if the abort condition is true. Otherwise, with the abort condition as false, the property expression evaluates to completionlog]