{
  "assisted_by": [
    "Claude Opus 5.5 (Anthropic)"
  ],
  "canonical_sha256": "4628185a3e7815930fb6dc1aa49b1c709aa0ab8499b380358e090560d89ef263",
  "checker": {
    "canon_script_sha256": "bbd11227d45dc1365f27597fd45c565fe721ba2648450588fc4fd983d00b367b",
    "extractor_sha256": "4930696021c588c75dc890034c534c95560ad9a28a4955b87d1f8d68b5edbc0c",
    "files": {
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      "check/Comparator.lean": "3145eb578ca71e452eff05a398e8ad04673e6c72ca5343b234cb22e2cefe65a6",
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      "check/clocked_rules.py": "73856a45905724544247ad29042bdc2f1778271ec07b15cdb3a5f214685165c1",
      "check/envelope.py": "076db01a9791bcc25ee84e9b0033604a4b675f00b212eab0c864078e6a4748b7",
      "check/postsynth.py": "4e1ee2110c63f24e033dd689c929ea686ddf10f4db23b9057c6fb711394c7558",
      "lakefile.toml": "f35a88404367d22906effc14d644aac9a9cad47dfd3b704ea8fec88acfaf9c4d",
      "lean-toolchain": "62c2d9c0fc1ec4c67e151c11eff41ca004ef38e179cf9476c230406e6defedef",
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      "score/fourstate.py": "95332451ae3754226fb87b46027385b46a91121e7eb9ae25b302bce756d90475",
      "score/ge.json": "6a29196a3f4b58241f4c9af650c9141e4632b737214d563a11ba142a725c4bea",
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      "score/score.py": "71d2e3b82f8813ec64a58f0a46909ca23dfab377db44eda6f294b713f45ae781",
      "score/srcgate.py": "11952f61058051c9e8de91a801b672d07e66a29308e978156c04ffd9f0dbef45",
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      "score/svgolf_seq.ys": "c3874dbfc85921a87df6eacdfc6b2c9a0e2b34edd5738951e0d8bdb51f4558b2"
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    "ge_table_sha256": "6a29196a3f4b58241f4c9af650c9141e4632b737214d563a11ba142a725c4bea",
    "lean_surfaces_revision": "d1f3cae6f01a088007a57b31ff8baa6b839d6f74",
    "lean_toolchain": "leanprover/lean4:v4.33.0-rc1",
    "script_sha256": "ea58219d8ef14c3bad265218ee266ccdb709ac9d4dc5258edc34d51ee83a0445",
    "statement": {
      "SvGolf/Task.lean": "b3f184fea55550ad95a76f0af490899f2d69f39dc5205d7408c69e1cf6de4e75",
      "tasks/mul/Spec.lean": "8791b67eebf44034f5d825561fc6d472bae2347a7ba3a75461ebd4dc59d00880"
    },
    "svgolf_revision": "d1f3cae6f01a088007a57b31ff8baa6b839d6f74",
    "verilator": "Verilator 5.042 2025-11-02 rev UNKNOWN.REV",
    "yosys": "Yosys 0.53 (git sha1 53c22ab7c0ced80861c7536c5dae682c30fb5834, clang++ 17.0.0 -fPIC -O3)"
  },
  "files": {
    "lean": {
      "name": "Solution.lean",
      "sha256": "82239e66a52649df67647c70b7fc6fb8941a73b0d72c3d1a7dfb01aada559d35"
    },
    "sv": {
      "name": "solution.sv",
      "sha256": "90943a571f7f69892a084a2045add583e1cafaee9bf623ceb18aa108f69b0192"
    }
  },
  "notes": "Made by an AI agent (Claude Opus, Anthropic) in the maintainers' newcomer study on 2026-11-05, as a new design rather than a variation of a shipped one; the agent chose the player name. The design is an unsigned radix-4 (modified) Booth multiplier for every N >= 1: b is recoded into K = (N+3)/2 digits in {-2..2}; each digit selects a, 2a or 0 as an (N+1)-bit magnitude XORed with the digit's sign, with the standard sign-extension constants and each negative row's +1 placed in a free column of the next row, all modulo 2^(2N); the K rows are reduced by a carry-save tape of full adders (adder g reads rows 3g..3g+2 and appends a sum row and a carry row), and a 2N-bit ripple-carry adder adds the last two rows. Of two sign-extension variants, both scored with score/ppa.py and simulated with sim.py, the one with the constants (rather than a sign fill) was kept. The proof is plain Lean over CombLib: a bfVal toolkit for rows built from windows and single bits, each Booth row's integer value by a case split on its three recoded bits, the Booth sum identity by induction on the number of rows, and a carry-save tape theorem for any number of leaf rows, generalized from the Wallace reference's argument; it is connected to the netlist by sv_structure (with its own rank function), sv_interface, sv_equations, sv_bridge and sv_cover. The comments in both files are the agent's. Proof ported by the maintainers for the 2026-11-06 range change; design unchanged.",
  "player": "plus-minus-two",
  "postsynth": {
    "full_vectors": 330,
    "mismatches": 0,
    "mode": "full",
    "point": "N=16",
    "salted": false,
    "seed": "4e2bbe4e2c8b22a42cb606fb59c6f2af2de620234e2433a45a6c2c90970cd247",
    "vectors": 330
  },
  "ppa": {
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    "area_um2_sky130": 7978.9024,
    "available": true,
    "cell_hist_sky130": {
      "and2_1": 208,
      "inv_1": 1,
      "mux2_1": 11,
      "nand2_1": 590,
      "nand2b_1": 33,
      "nor2_1": 17,
      "nor2b_1": 25,
      "or2_1": 48,
      "xnor2_1": 201,
      "xor2_1": 211
    },
    "cells_sky130": 1345,
    "constants": false,
    "critical": {
      "cells": 63,
      "edge": "r",
      "output": "p[31]"
    },
    "delay_ps_sky130": 6329,
    "legality": {
      "cells_outside_tables": 0,
      "over_max_capacitance": 0,
      "over_max_transition": 0,
      "table_reads_outside": 0,
      "worst_load_ratio": 0.464,
      "worst_transition_ratio": 0.468
    },
    "liberty_file": "sky130_fd_sc_hd__tt_025C_1v80.lib",
    "liberty_sha256": "ef34f999d582044cad9c1f4d5422504ae99702ad42baa432d75215476e5d23d5",
    "mapped": {
      "abc_version": "UC Berkeley, ABC 1.01 (compiled May  6 2025 05:45:16)",
      "area_e4um2_sky130_mapped_v1": 69641792,
      "area_um2_sky130_mapped_v1": 6964.1792,
      "available": true,
      "constants": false,
      "critical": {
        "cells": 33,
        "edge": "r",
        "output": "p[31]"
      },
      "equivalence": {
        "seed": "svgolf-ppa-mapped/1",
        "vectors": 2048
      },
      "liberty_file": "sky130_fd_sc_hd__tt_025C_1v80.lib",
      "liberty_sha256": "ef34f999d582044cad9c1f4d5422504ae99702ad42baa432d75215476e5d23d5",
      "mapped_buffers_sky130_v1": 0,
      "mapped_cell_hist_sky130_v1": {
        "a211oi_1": 1,
        "a21bo_1": 1,
        "a21boi_0": 6,
        "a21o_1": 8,
        "a21oi_1": 31,
        "a221o_1": 1,
        "a22oi_1": 98,
        "a31oi_1": 2,
        "a32o_1": 2,
        "a32oi_1": 9,
        "and2_0": 10,
        "and3_1": 5,
        "and3b_1": 7,
        "inv_1": 19,
        "maj3_1": 57,
        "nand2_1": 100,
        "nand2b_1": 31,
        "nand3_1": 17,
        "nand3b_1": 1,
        "nor2_1": 44,
        "nor2b_1": 36,
        "nor3_1": 3,
        "nor3b_1": 1,
        "o21a_1": 6,
        "o21ai_0": 54,
        "o22ai_1": 1,
        "o32ai_1": 1,
        "or2_0": 6,
        "or3_1": 5,
        "or4_1": 1,
        "xnor2_1": 276,
        "xnor3_1": 11,
        "xor2_1": 93,
        "xor3_1": 3
      },
      "mapped_cells_sky130_v1": 947,
      "mapped_delay_sky130_v1": 7694,
      "mapped_inverters_sky130_v1": 19,
      "mapped_levels_sky130_v1": 33,
      "netlist_sha256": "9383c96887626b075e285065361c71e6fce98fddc1db255aa6a44b5779b9fdf7",
      "ppa_mapped_pins_sha256": "4b8688ba3f4d67681658e5944afe878592adf588cd416a8b47597ebe06deb045",
      "ppa_mapped_script_sha256": "93547b343dbac135737e98516b1004a780e1cf2f579e1bd7fed82c908c6d4125",
      "ppa_mapped_version": "sky130_a1_v1",
      "ppa_pins_sha256": "d66a6086a37a97f5985266057051979fb6a8a3c557d3ef9c42acc1b5e41502d8",
      "ppa_script_sha256": "912031912c3e3f6790725161753e95415df34846bd8c27dde3eb707747ddbcbe",
      "rtlil_sha256": "0af7b7eb8a7a66ddc1d805060f6d0968880d97f36cf9e853b36f1f83e87a330a",
      "setup": {
        "pi_slew_ps": 50,
        "po_load_ff": 10,
        "wires": "none"
      },
      "yosys_version": "Yosys 0.53 (git sha1 53c22ab7c0ced80861c7536c5dae682c30fb5834, clang++ 17.0.0 -fPIC -O3)"
    },
    "netlist_sha256": "46a50b3df3a6df6134d40b1e2d2cdb2065e0788bd4db0324736c4c77f2d97656",
    "ppa_pins_sha256": "d66a6086a37a97f5985266057051979fb6a8a3c557d3ef9c42acc1b5e41502d8",
    "ppa_script_sha256": "912031912c3e3f6790725161753e95415df34846bd8c27dde3eb707747ddbcbe",
    "ppa_version": "sky130_a0_v3",
    "repair": {
      "buffers": 0,
      "cells_before": 1345,
      "method": "buffer_trees_v1",
      "netlist_sha256": "f004d9322750b545d2b544289bf33e7b8519a7baeba01b5f278b7992e5b91e7f",
      "nets_buffered": 0,
      "rounds": 1,
      "tie_cells": 0
    },
    "setup": {
      "input_drive": "sky130_fd_sc_hd__buf_8",
      "pi_slew_ps": 50,
      "po_load_ff": 10,
      "tables": "no extrapolation",
      "wires": "none"
    },
    "unit_depth": 64
  },
  "proof": {
    "axioms": [
      "Classical.choice",
      "Quot.sound",
      "propext"
    ],
    "build_seconds": 97.59,
    "imports": [
      "Submission.Design",
      "SvGolf.Comb",
      "LeanModels.Sv.CombEqTactic",
      "LeanModels.Sv.CombLib"
    ],
    "lines": 768,
    "tactics": [
      "decide",
      "grind",
      "induction",
      "omega",
      "simp",
      "sv_cover",
      "sv_equations",
      "sv_interface",
      "sv_rowmajor",
      "sv_structure"
    ],
    "uses_comb_eq": true,
    "uses_comb_view": false
  },
  "record_hash": "adce0bcea63056598ae7a54894b5e77d82a0dbcc331eece073a123e4cc25ae1a",
  "schema": "svgolf-leaderboard-record/1",
  "score": {
    "area_ge": 1875.892,
    "area_mge": 1875892,
    "depth": 64,
    "gates": {
      "AND": 208,
      "ANDNOT": 25,
      "MUX": 11,
      "NAND": 590,
      "NOR": 17,
      "NOT": 1,
      "OR": 48,
      "ORNOT": 33,
      "XNOR": 201,
      "XOR": 211
    },
    "num_gates": 1345,
    "rtlil_sha256": "0af7b7eb8a7a66ddc1d805060f6d0968880d97f36cf9e853b36f1f83e87a330a",
    "scoring_point": {
      "N": 16
    },
    "top": "mul_n"
  },
  "submitted_at": "2026-11-05",
  "task": "mul"
}