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https://github.com/c-cube/sidekick.git
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422 lines
11 KiB
INI
422 lines
11 KiB
INI
c File: pret150_60.cnf
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c
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c SOURCE: Daniel Pretolani (daniele@crt.umontreal.ca)
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c
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c DESCRIPTION: Unsatisfiable instances of a graph 2-coloring with
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c parity constraints.
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c
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c ----------- DIMACS Challenge - CNF format -----------
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c
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c TRISAT Generator (Pretolani 1990)
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c
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c (Even) number of nodes ==> 100
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c Charge ( 0 = sat. / 1 = unsat. ) ==> 1
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c Horn Percentage (min -> 25; max -> 75) ==> 60
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c Number of Propositional variables ==> 150
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c Number of Clauses ==> 400
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c Nodes with Charge = 1 ==> 71
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c Horn Percentage (exact) ==> 60.000
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c
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c -----------------------------------------------------
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p cnf 150 400
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-3 -2 -1 0
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3 2 -1 0
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2 1 -3 0
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3 1 -2 0
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-6 -5 -4 0
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6 5 -4 0
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5 4 -6 0
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6 4 -5 0
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9 8 -7 0
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8 7 -9 0
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-21 -20 -19 0
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