Boeing has withdrawn a contract offer that would have given striking workers 30% raises over four years after talks broke down.

Negotiation broke off during the latest negotiations between the plane manufacturer and the International Association of Machinists. The union posted about it on social media, reiterating demands for higher pay and to bring back pensions.

The strike, which started Sept. 13, will continue as the planemaker struggles to raise cash and address production safety problems.

Boeing Co.’s stock slid 2.5% Wednesday after the company said it has reached an impasse in its talks with its machinists union to end a strike that estimates say is costing it more than $1 billion a month.

The company pulls an offer to striking workers as its financial woes mount and its planes get another safety warning.