# Preprocessing time       : 0.030 s
# Problem is unsatisfiable (or provable), constructing proof object
# SZS status Theorem
# SZS output start CNFRefutation.
fof(2, axiom,![X1]:![X2]:cong(X1,X2,X2,X1),file('th1.p', ax3_cong_pseudo_reflexivity)).
fof(4, axiom,![X1]:![X2]:![X3]:![X4]:![X5]:![X6]:((cong(X1,X2,X3,X4)&cong(X1,X2,X5,X6))=>cong(X3,X4,X5,X6)),file('th1.p', ax5_cong_inner_transitivity)).
fof(13, conjecture,![X7]:![X8]:cong(X7,X8,X7,X8),file('th1.p', goal)).
fof(14, negated_conjecture,~(![X7]:![X8]:cong(X7,X8,X7,X8)),inference(assume_negation,[status(cth)],[13])).
fof(19, plain,![X3]:![X4]:cong(X3,X4,X4,X3),inference(variable_rename,[status(thm)],[2])).
cnf(20,plain,(cong(X1,X2,X2,X1)),inference(split_conjunct,[status(thm)],[19])).
fof(26, plain,![X1]:![X2]:![X3]:![X4]:![X5]:![X6]:((~(cong(X1,X2,X3,X4))|~(cong(X1,X2,X5,X6)))|cong(X3,X4,X5,X6)),inference(fof_nnf,[status(thm)],[4])).
fof(27, plain,![X7]:![X8]:![X9]:![X10]:![X11]:![X12]:((~(cong(X7,X8,X9,X10))|~(cong(X7,X8,X11,X12)))|cong(X9,X10,X11,X12)),inference(variable_rename,[status(thm)],[26])).
cnf(28,plain,(cong(X1,X2,X3,X4)|~cong(X5,X6,X3,X4)|~cong(X5,X6,X1,X2)),inference(split_conjunct,[status(thm)],[27])).
fof(64, negated_conjecture,?[X7]:?[X8]:~(cong(X7,X8,X7,X8)),inference(fof_nnf,[status(thm)],[14])).
fof(65, negated_conjecture,?[X9]:?[X10]:~(cong(X9,X10,X9,X10)),inference(variable_rename,[status(thm)],[64])).
fof(66, negated_conjecture,~(cong(esk8_0,esk9_0,esk8_0,esk9_0)),inference(skolemize,[status(esa)],[65])).
cnf(67,negated_conjecture,(~cong(esk8_0,esk9_0,esk8_0,esk9_0)),inference(split_conjunct,[status(thm)],[66])).
cnf(74,plain,(cong(X1,X2,X3,X4)|~cong(X4,X3,X1,X2)),inference(spm,[status(thm)],[28,20,theory(equality)])).
cnf(81,plain,(cong(X1,X2,X1,X2)),inference(spm,[status(thm)],[74,20,theory(equality)])).
cnf(85,negated_conjecture,($false),inference(rw,[status(thm)],[67,81,theory(equality)])).
cnf(86,negated_conjecture,($false),inference(cn,[status(thm)],[85,theory(equality)])).
cnf(87,negated_conjecture,($false),86,['proof']).
# SZS output end CNFRefutation
