To avoid further price-gouging, Norway's Ministry of Government Administration announced that it was freezing prices on lodging, food and beverages in the Lillehammer area during the Winter Olympics.
Lodging prices in Norway had never been higher than during the Winter Olympics due to the price-gouging.
There is no mention of the historic level of lodging prices in this paragraph, just that price-gouging had occurred.  It's possible that prices were as high as they'd ever been, but there's no evidence of that either way.  The system is confused for a reason I can't discern.  Perhaps it doesn't like the term "never," and thinks that makes the statement unlikely to be correct.
( z1 have-degree :polarity - :ARG1 ( z2 monetary-quantity :ARG2-of ( z3 price :ARG1 ( z4 lodge ) :location ( z5 country :name ( z6 name :op "Norway" ) ) ) ) :ARG2 ( z7 high :ARG1 z2 ) :ARG3 ( z8 more ) :ARG4 ( z9 monetary-quantity :ARG2-of ( z10 price :time ( z11 game :name ( z12 name :op "Winter" :op "Olympics" ) ) ) ) :time ( z13 ever ) :ARG1-of ( z14 cause :ARG0 ( z15 gouge :ARG1 ( z16 thing :ARG2-of ( z17 price ) ) ) ) )